JPH0812814A - Rubber composition and production of rubber product used therefor - Google Patents
Rubber composition and production of rubber product used thereforInfo
- Publication number
- JPH0812814A JPH0812814A JP15137294A JP15137294A JPH0812814A JP H0812814 A JPH0812814 A JP H0812814A JP 15137294 A JP15137294 A JP 15137294A JP 15137294 A JP15137294 A JP 15137294A JP H0812814 A JPH0812814 A JP H0812814A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- keratin
- natural rubber
- casein
- solid content
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、蛋白質を配合したゴム
組成物およびこれを用いるゴム製品の製造方法に関し、
より詳しくは脱蛋白天然ゴムに蛋白質を配合することに
より未加硫状態であっても実用上充分な強度を有し、し
かも即時型アレルギーおよび遅延型アレルギーを起こさ
ないゴム組成物およびこれを用いるゴム製品の製造方法
に関する。TECHNICAL FIELD The present invention relates to a rubber composition containing a protein and a method for producing a rubber product using the same.
More specifically, by blending a protein with deproteinized natural rubber, a rubber composition that has practically sufficient strength even in an unvulcanized state and does not cause immediate allergy or delayed allergy, and a rubber using the same It relates to a method of manufacturing a product.
【０００２】[0002]
【従来の技術および発明が解決しようとする課題】生ゴ
ムは単独で使用するには 強度が低すぎるため実用的で
はない。そのため、従来より、生ゴムは加硫して用いる
のが常である。加硫には、硫黄加硫法、過酸化物加硫
法、放射線加硫法などが知られている。これらの加硫法
は、固形ゴムのほかラテックスゴムについても適用でき
る。BACKGROUND OF THE INVENTION Raw rubber is not practical because it has too low strength to be used alone. Therefore, conventionally, raw rubber is usually vulcanized before use. Known vulcanization methods include sulfur vulcanization, peroxide vulcanization, and radiation vulcanization. These vulcanization methods can be applied to latex rubber as well as solid rubber.
【０００３】しかしながら、上記した加硫方法によって
得られるゴム製品には、以下に述べるような問題があ
る。すなわち、硫黄加硫により得られるゴム製品におい
ては、これを酸性溶液中で使用した場合、製造時に添加
された亜鉛華から亜鉛イオンが溶出することがある。ま
た、添加した加硫促進剤の種類によっては、ゴム製品自
体が皮膚刺激性を有し、遅延型アレルギーを起こす場合
がある。However, the rubber product obtained by the above-mentioned vulcanization method has the following problems. That is, in a rubber product obtained by sulfur vulcanization, when this is used in an acidic solution, zinc ions may be eluted from the zinc white added during the production. Further, depending on the type of the vulcanization accelerator added, the rubber product itself may have skin irritation and cause delayed allergy.
【０００４】また、過酸化物加硫により得られるゴム製
品においては、過酸化物が強い皮膚刺激性を有するた
め、過酸化物を含有するゴム製品自体が皮膚刺激性を有
する場合がある。さらに、放射線加硫は設備が大掛かり
になり、また得られるゴム製品は、架橋剤として四塩化
炭素や有機多官能性モノマーを含有しているため、人体
にきわめて有毒である。Further, in a rubber product obtained by peroxide vulcanization, since the peroxide has strong skin irritation, the rubber product itself containing the peroxide may have skin irritation. Further, radiation vulcanization requires a large amount of equipment, and the obtained rubber product is extremely toxic to the human body because it contains carbon tetrachloride and an organic polyfunctional monomer as a crosslinking agent.
【０００５】一方、通常の天然ゴムは特有の蛋白質を含
有しているために、過敏な人には皮膚接触により即時型
アレルギーを起こさせ、ひどい場合には死亡にいたるこ
ともある。On the other hand, since ordinary natural rubber contains a unique protein, it may cause an immediate allergy to a sensitive person due to skin contact, and may even cause death in severe cases.
【０００６】本発明の主たる目的は、上述の技術的課題
を解決し、即時型アレルギーや遅延型アレルギーをひき
起こすおそれがなく、しかもゴム製品を簡単に製造でき
るゴム組成物およびこれを用いたゴム製品の製造方法を
提供することである。A main object of the present invention is to solve the above-mentioned technical problems, to prevent immediate allergy or delayed allergy, and to easily manufacture a rubber product, and a rubber composition using the same. It is to provide a manufacturing method of a product.
【０００７】本発明の他の目的は、充填剤を用いずに従
来の加硫ゴムよりも高いモジュラスを有するゴム製品を
得ることができるゴム組成物およびこれを用いるゴム製
品の製造方法を提供することである。Another object of the present invention is to provide a rubber composition capable of obtaining a rubber product having a higher modulus than conventional vulcanized rubber without using a filler, and a method for producing a rubber product using the same. That is.
【０００８】[0008]
【課題を解決するための手段および作用】本発明者ら
は、上記課題を達成すべく鋭意研究を重ねた結果、実質
的に蛋白質を含有しない脱蛋白天然ゴムにケラチンおよ
び／またはカゼインを配合したゴム組成物を使用すると
きは、たとえ加硫しなくても、実用上充分な強度を有
し、しかも加硫剤や加硫促進剤を含まず、また天然ゴム
に含有される蛋白質が除去されているため、即時型アレ
ルギーや遅延型アレルギーをひき起こすおそれもないゴ
ム製品が得られるという新たな事実を見出し、本発明を
完成するに到った。Means and Actions for Solving the Problems As a result of intensive studies to achieve the above objects, the present inventors have blended keratin and / or casein with deproteinized natural rubber containing substantially no protein. When a rubber composition is used, it has practically sufficient strength even without vulcanization, contains no vulcanizing agent or vulcanization accelerator, and removes proteins contained in natural rubber. Therefore, the present invention has been completed by discovering a new fact that a rubber product which does not cause immediate type allergy or delayed type allergy can be obtained.
【０００９】すなわち、本発明のゴム組成物は、実質的
に蛋白質を含有しない脱蛋白天然ゴム１００重量部に、
ケラチンおよび／またはカゼインを固形分で０．５〜２
０重量部配合したことを特徴とするものである。That is, the rubber composition of the present invention contains 100 parts by weight of deproteinized natural rubber containing substantially no protein,
Keratin and / or casein in solid content of 0.5-2
It is characterized by containing 0 parts by weight.
【００１０】また、本発明のゴム製品の製造方法は、実
質的に蛋白質を含有しない脱蛋白天然ゴムラテックスに
ケラチンおよび／またはカゼインの水溶液を、ゴム固形
分１００重量部に対して固形分で０．５〜２０重量部の
割合で加えた後、成形・乾燥することを特徴とする。前
記ケラチンは爪、髪の毛、角、蹄、羊毛などに含まれる
硬蛋白質の一種であり、人体に無害である。また、カゼ
インは牛乳に含まれているリン蛋白質の一種であり、栄
養上重要な蛋白質であり、これも人体に安全である。Further, in the method for producing a rubber product of the present invention, a deproteinized natural rubber latex containing substantially no protein is mixed with an aqueous solution of keratin and / or casein in a solid content of 0 to 100 parts by weight of the rubber solid content. It is characterized in that it is added at a ratio of 0.5 to 20 parts by weight, and then molded and dried. Keratin is a kind of hard protein contained in nails, hair, horns, hoofs, and wool, and is harmless to the human body. In addition, casein is a kind of phosphoprotein contained in milk and is an important protein for nutrition, which is also safe for humans.
【００１１】ケラチンはそのままの状態では水にほとん
ど溶解しない。これはシスチンの含量が多いため、ペプ
チド鎖同士が−Ｓ−Ｓ−結合で橋架けされているためと
考えられている。本発明において使用されるケラチン
は、天然ゴムラテックスにブレンドする場合、水溶性で
あることが必要である。このような水溶性ケラチンは日
本化学会第６３会春季年会講演２ Ａ２ ４７で公表さ
れている方法で調製することができる。すなわち、羊毛
を８モル尿素、還元剤２−メルカプトエタノール、界面
活性剤と共に５０℃で１２時間振盪し、ついでろ過した
後、セロファン・チューブで透析することによってケラ
チン水溶液が得られる。Keratin hardly dissolves in water as it is. It is considered that this is because the cystine content is high, and thus the peptide chains are bridged by -SS-bonds. The keratin used in the present invention needs to be water-soluble when blended with a natural rubber latex. Such water-soluble keratin can be prepared by the method disclosed in the Chemical Society of Japan 63rd Spring Annual Meeting Lecture 2 A2 47. That is, wool is shaken with 8 mol urea, a reducing agent 2-mercaptoethanol, and a surfactant at 50 ° C. for 12 hours, filtered, and then dialyzed with a cellophane tube to obtain an aqueous keratin solution.
【００１２】また、カゼインは少なくとも３種の成分か
らなり、全体では窒素量が１５〜１６％、リン量０．９
％程度である。工業的には接着剤、水性塗料、乳化剤な
どに使用される。通常、カゼインは純水に不溶である
が、アンモニアなどでアルカリ性にすると、容易に溶解
させることができる。また、前記した水溶性ケラチンと
同様の調製法で中性のカゼイン水溶液を得ることもでき
る。[0012] Casein is composed of at least three kinds of components, and the total amount of nitrogen is 15 to 16% and the amount of phosphorus is 0.9.
%. Industrially used as adhesives, water-based paints, emulsifiers, etc. Usually, casein is insoluble in pure water, but can be easily dissolved by making it alkaline with ammonia or the like. Also, a neutral casein aqueous solution can be obtained by the same preparation method as that for the water-soluble keratin described above.
【００１３】本発明においては、ケラチンとカゼインの
いずれを用いてもよく、また両者を混合して用いてもよ
いが、ＳＨ基が多いため架橋が期待できかつ粘度上昇が
ないのでラテックス状態のゴムに添加しやすいという特
質を有するケラチンを用いるのが望ましい。本発明にお
けるケラチンやカゼインの配合量は、ゴム（固形分）１
００重量部に対して固形分で０．５〜２０重量部であ
る。ケラチンやカゼインの配合量が０．５重量部を下回
る場合はそれらを添加する効果がなく、強度の向上を図
ることができない。一方、ケラチンやカゼインの配合量
が２０重量部を越える場合は、ケラチンやカゼインの水
溶液の量が多大となり、固形分が少なくなり加工性が悪
くなったり、長時間の乾燥工程が必要となるなど、無駄
が多くなってしまうためである。すなわち、ケラチンや
カゼインの水溶液は、前述した還元法で調製すると、蛋
白質成分が２〜３重量％のものしか得られず、限外ろ過
で濃縮しても１０重量％程度が限界だからである。In the present invention, either keratin or casein may be used, or both may be used as a mixture. However, since there are many SH groups, crosslinking can be expected and viscosity does not increase, so that rubber in latex state can be used. It is desirable to use keratin, which has the characteristic that it is easy to add to keratin. The compounding amount of keratin or casein in the present invention is 1 (rubber (solid content))
The solid content is 0.5 to 20 parts by weight with respect to 00 parts by weight. When the blending amount of keratin or casein is less than 0.5 parts by weight, there is no effect of adding them and strength cannot be improved. On the other hand, when the blending amount of keratin or casein exceeds 20 parts by weight, the amount of the aqueous solution of keratin or casein becomes large, the solid content decreases, the processability deteriorates, and a long drying process is required. This is because there is a lot of waste. That is, when an aqueous solution of keratin or casein is prepared by the above-mentioned reduction method, only 2 to 3% by weight of protein component can be obtained, and even if it is concentrated by ultrafiltration, it is about 10% by weight.
【００１４】本発明のゴム組成物を使用してゴム製品を
得るには、前記したように、ゴムラテックスに前記した
水溶性ケラチンまたはカゼインを所定の割合で加えたラ
テックス組成物からゴム製品を作製すると、強度のすぐ
れたものが得られる。この場合、ラテックス組成物を乾
燥してから成形することもできるし、所定の型（例えば
手袋の型など）をラテックスに浸漬し、それを引き上げ
て乾燥することもできる。乾燥を早めるために、または
架橋を早めるために加熱することも可能である。ケラチ
ンとカゼインはそれ自身で架橋するほか、ゴムとも反応
して結合するため、乾燥後に水中に浸漬しても、ケラチ
ンは抽出されることはない。To obtain a rubber product using the rubber composition of the present invention, as described above, a rubber product is prepared from a latex composition obtained by adding the above-mentioned water-soluble keratin or casein to the rubber latex in a predetermined ratio. Then, a product having excellent strength can be obtained. In this case, the latex composition can be dried and then molded, or a predetermined mold (for example, a glove mold) can be dipped in the latex and then pulled up and dried. It is also possible to heat to accelerate drying or to accelerate crosslinking. Since keratin and casein crosslink by themselves and also react with rubber to bond, keratin is not extracted even when immersed in water after drying.
【００１５】脱蛋白天然ゴムは、特願平４−２０８７５
４号〜特願平４−２０８７５８号に詳細に記載されてい
る。すなわち、脱蛋白天然ゴムは、プロテアーゼと特定
の界面活性剤とを含む処理剤を天然ゴムラテックスに添
加して、ラテックス粒子を洗浄して得られる。また、単
に酵素分解で天然ゴム中の蛋白質を分解するだけであっ
ても、アレルギー性は消失するので、用途によっては、
蛋白質の分解により生成したアミノ酸が残存していても
構わない。Deproteinized natural rubber is disclosed in Japanese Patent Application No. 4-20875.
No. 4 to Japanese Patent Application No. 4-208758. That is, the deproteinized natural rubber is obtained by adding a treatment agent containing a protease and a specific surfactant to the natural rubber latex and washing the latex particles. In addition, even if the protein in natural rubber is simply decomposed by enzymatic decomposition, allergenicity disappears.
Amino acids generated by protein degradation may remain.
【００１６】天然ゴム中の蛋白質が分解されたか否か
は、天然ゴムの赤外分光光度計を用いて、ポリペプチド
に特有の３２８０ｃｍ -1 に吸収が認められるか否かで
確認することができる。本発明における脱蛋白天然ゴム
は、かかる３２８０ｃｍ -1 に吸収が実質的に認められ
ないものをいう。脱蛋白天然ゴムを調製する際に使用す
る原料としては、市販のハイアンモニアラテックスでも
よいし、採取されたばかりのフィールドラテックスでも
よい。Whether or not the protein in the natural rubber has been decomposed can be confirmed by using an infrared spectrophotometer of the natural rubber, by determining whether or not absorption at 3280 cm -1 peculiar to the polypeptide is recognized. . The deproteinized natural rubber in the present invention is one in which absorption is not substantially observed at 3280 cm -1 . The raw material used when preparing the deproteinized natural rubber may be a commercially available high-ammonia latex or a freshly collected field latex.
【００１７】成形は、通常のラテックスの成形方法、例
えば流延法、凝着法、感熱法などがいずれも適用可能で
ある。また、ゴム組成物に従来より使用されている充填
剤、補強剤を添加してもよい。For the molding, any of the usual latex molding methods such as casting method, coagulation method and heat sensitive method can be applied. Further, conventionally used fillers and reinforcing agents may be added to the rubber composition.
【００１８】[0018]
【実施例】実施例１ ０．７重量％のアンモニアを含む天然ゴムラテックス
（ハイアンモニアラテックス、以下、ＨＡという）を脱
蛋白処理剤（プロテアーゼと界面活性剤とからなる）で
処理して、天然ゴム中の蛋白質を分解してアミノ酸を除
去し、濃縮した。得られた脱蛋白天然ゴムのラテックス
に水溶性のケラチンを、脱蛋白天然ゴム（固形分）１０
０重量部に対して固形分で０．５重量部の割合で配合し
た。得られたゴム組成物をガラス製のプレートに流し込
み、室温で乾燥・成形して厚さ０．３mmのフィルムを得
た。乾燥後、プレートから剥がしてゴム被膜を得た。EXAMPLES Example 1 Natural rubber latex (high ammonia latex, hereinafter referred to as HA) containing 0.7% by weight of ammonia was treated with a deproteinizing agent (comprising a protease and a surfactant) to give a natural product. The protein in the rubber was decomposed to remove amino acids and concentrated. Water-soluble keratin was added to the obtained deproteinized natural rubber latex, and deproteinized natural rubber (solid content) 10
It was compounded in a proportion of 0.5 parts by weight in terms of solid content with respect to 0 parts by weight. The obtained rubber composition was poured into a glass plate, dried and molded at room temperature to obtain a film having a thickness of 0.3 mm. After drying, it was peeled from the plate to obtain a rubber coating.
【００１９】水溶性のケラチンは、前述の「日本化学会
第６３回春季年会講演２ Ａ２ ４７」で公表されてい
る方法で作成したものである。この方法で得られた水溶
液中のケラチン濃度は２〜３％程度であった。実施例２ 脱蛋白天然ゴムのラテックスに水溶性のケラチンを、脱
蛋白天然ゴム（固形分）１００重量部に対して固形分で
５重量部の割合で配合したほかは実施例１と同様にして
厚さ０．３mmのフィルムを得た。実施例３ 脱蛋白天然ゴムのラテックスに水溶性のケラチンを、脱
蛋白天然ゴム（固形分）１００重量部に対して固形分で
２０重量部の割合で配合したほかは実施例１と同様にし
て厚さ０．３mmのフィルムを得た。実施例４ 天然ゴムの木から採取したばかりのフィールドラテック
ス（以下、ＦＬという）を実施例１のＨＡと同様にして
脱蛋白した。これに水溶性のケラチンを、脱蛋白天然ゴ
ム（固形分）１００重量部に対して固形分で５重量部の
割合で配合したほかは実施例１と同様にして厚さ０．３
mmのフィルムを得た。実施例５ 水溶性のカゼインを固形分で０．５重量部の割合で用い
たほかは実施例１と同様にして厚さ０．３mmのフィルム
を得た。水溶性のカゼインは実施例１の水溶性のケラチ
ンと同様にして調製した。実施例６ 実施例５と同じ水溶性のカゼインを固形分で５重量部の
割合で用いたほかは実施例１と同様にして厚さ０．３mm
のフィルムを得た。実施例７ 実施例５と同じ水溶性のカゼインを固形分で２０重量部
の割合で用いたほかは実施例１と同様にして厚さ０．３
mmのフィルムを得た。実施例８ 実施例４で使用した脱蛋白天然ゴムを用い、かつケラチ
ンに代えて実施例５と同じ水溶性のカゼインを固形分で
５重量部の割合で用いたほかは実施例１と同様にして厚
さ０．３mmのフィルムを得た。比較例１ 実施例１で使用した脱蛋白天然ゴムをそのまま使用し、
ケラチンを添加しなかったほかは実施例１と同様にし
て、厚さ０．３mmのフィルムを得た。比較例２ 実施例４で使用した脱蛋白天然ゴムをそのまま使用し、
ケラチンを添加しなかったほかは実施例４と同様にし
て、厚さ０．３mmのフィルムを得た。比較例３ 水溶性のケラチンを固形分で０．３重量部の割合で添加
したほかは実施例１と同様にして厚さ０．３mmのフィル
ムを得た。比較例４ 水溶性のケラチンを固形分で２５重量部の割合で添加し
たほかは実施例１と同様にして厚さ０．３mmのフィルム
を得た。比較例５ 実施例５と同じ水溶性のカゼインを固形分で０．３重量
部の割合で添加したほかは実施例１と同様にして厚さ
０．３mmのフィルムを得た。比較例６ 実施例５と同じ水溶性のカゼインを固形分で２５重量部
の割合で添加したほかは実施例１と同様にして厚さ０．
３mmのフィルムを得た。比較例７ 実施例１における脱蛋白していない天然ゴムラテックス
をそのまま使用し、ケラチンを添加しなかったほかは実
施例１と同様にして厚さ０．３mmのフィルムを得た。比較例８ 脱蛋白天然ゴムに代えて、脱蛋白していない天然ゴムラ
テックスを使用したほかは実施例１と同様にして、厚さ
０．３mmのフィルムを得た。比較例９ 脱蛋白天然ゴムに代えて、脱蛋白していない天然ゴムラ
テックスを使用したほかは実施例５と同様にして、厚さ
０．３mmのフィルムを得た。評価試験 各実施例および比較例で得たフィルムをＪＩＳ−４号形
のダンベル状に打ち抜き、ＪＩＳ−Ｋ６３０１に準じて
引っ張り試験を行い、破断強度を測定した。すなわち、
試験は、試料数を３個とし、測定値は大きいものから順
に並べて、Ｓ1≧Ｓ2 ≧Ｓ3 とし、次式を用いて平均値
を求めた。The water-soluble keratin was prepared by the method disclosed in the above-mentioned "Chemical Society of Japan 63rd Spring Annual Meeting Lecture 2 A247". The keratin concentration in the aqueous solution obtained by this method was about 2-3%. Example 2 In the same manner as in Example 1 except that water-soluble keratin was added to the latex of deproteinized natural rubber at a ratio of 5 parts by weight in solid content to 100 parts by weight of deproteinized natural rubber (solid content). A film having a thickness of 0.3 mm was obtained. Example 3 In the same manner as in Example 1 except that water-soluble keratin was added to the latex of deproteinized natural rubber in a proportion of 20 parts by weight based on 100 parts by weight of deproteinized natural rubber (solid content). A film having a thickness of 0.3 mm was obtained. Example 4 A field latex (hereinafter referred to as FL) just collected from a natural rubber tree was deproteinized in the same manner as HA of Example 1. A thickness of 0.3 was obtained in the same manner as in Example 1 except that water-soluble keratin was added to the deproteinized natural rubber (solid content) in an amount of 5 parts by weight based on 100 parts by weight.
A film of mm was obtained. Example 5 A film having a thickness of 0.3 mm was obtained in the same manner as in Example 1 except that water-soluble casein was used in a proportion of 0.5 part by weight in terms of solid content. The water-soluble casein was prepared in the same manner as the water-soluble keratin of Example 1. Example 6 A thickness of 0.3 mm was obtained in the same manner as in Example 1 except that the same water-soluble casein as in Example 5 was used in a solid content of 5 parts by weight.
Was obtained. Example 7 A thickness of 0.3 was obtained in the same manner as in Example 1 except that the same water-soluble casein as in Example 5 was used in a solid content of 20 parts by weight.
A film of mm was obtained. Example 8 The same as Example 1 except that the deproteinized natural rubber used in Example 4 was used, and the same water-soluble casein as in Example 5 was used in place of keratin at a solid content of 5 parts by weight. A film having a thickness of 0.3 mm was obtained. Comparative Example 1 The deproteinized natural rubber used in Example 1 was used as is,
A film having a thickness of 0.3 mm was obtained in the same manner as in Example 1 except that keratin was not added. Comparative Example 2 The deproteinized natural rubber used in Example 4 was used as is,
A film having a thickness of 0.3 mm was obtained in the same manner as in Example 4 except that keratin was not added. Comparative Example 3 A film having a thickness of 0.3 mm was obtained in the same manner as in Example 1 except that water-soluble keratin was added in a proportion of 0.3 parts by weight in terms of solid content. Comparative Example 4 A 0.3 mm thick film was obtained in the same manner as in Example 1 except that water-soluble keratin was added in a proportion of 25 parts by weight in terms of solid content. Comparative Example 5 A film having a thickness of 0.3 mm was obtained in the same manner as in Example 1 except that the same water-soluble casein as in Example 5 was added in a proportion of 0.3 parts by weight in terms of solid content. Comparative Example 6 In the same manner as in Example 1, except that the same water-soluble casein as in Example 5 was added in a proportion of 25 parts by weight in terms of solid content, the thickness was 0.1.
A 3 mm film was obtained. Comparative Example 7 A film having a thickness of 0.3 mm was obtained in the same manner as in Example 1 except that the undeproteinized natural rubber latex in Example 1 was used as it was and no keratin was added. Comparative Example 8 A film having a thickness of 0.3 mm was obtained in the same manner as in Example 1 except that natural rubber latex that had not been deproteinized was used in place of the deproteinized natural rubber. Comparative Example 9 A film having a thickness of 0.3 mm was obtained in the same manner as in Example 5 except that natural rubber latex that was not deproteinized was used in place of the deproteinized natural rubber. Evaluation Test The films obtained in the respective examples and comparative examples were punched out into a JIS-4 type dumbbell shape and subjected to a tensile test according to JIS-K6301 to measure the breaking strength. That is,
In the test, the number of samples was set to three, the measured values were arranged in descending order, S 1 ≧ S 2 ≧ S 3, and the average value was calculated using the following equation.
【００２０】[0020]
【数１】 [Equation 1]
【００２１】測定結果を表１および表２に示す。The measurement results are shown in Tables 1 and 2.
【００２２】[0022]
【表１】 [Table 1]
【００２３】[0023]
【表２】 [Table 2]
【００２４】表１，表２に示すように、各実施例で得た
フィルムは、脱蛋白天然ゴムにケラチンまたはカゼイン
を配合しているため、比較例１〜６のフィルムに比べて
破断強度が向上している。しかも、脱蛋白天然ゴムを使
用することにより、蛋白質を除去していない天然ゴムに
比べても、破断強度の向上が顕著である。As shown in Tables 1 and 2, since the films obtained in the respective examples contain keratin or casein in the deproteinized natural rubber, they have a breaking strength higher than those of the films of Comparative Examples 1-6. Has improved. Moreover, by using the deproteinized natural rubber, the breaking strength is remarkably improved as compared with the natural rubber in which the protein is not removed.
【００２５】[0025]
【発明の効果】以上のように、本発明のゴム組成物およ
びこれを用いるゴム製品の製造方法によれば、脱蛋白天
然ゴムに所定量のケラチンおよび／またはカゼインを配
合して、高い強度を有しかつアレルギーをひき起こすこ
とのない安全なゴム製品を得ることができる。従って、
ゴム製の人工臓器、手袋、コンドーム、カテーテル、装
身具（ピアス、イアリングなどの装身具に補助的に用い
られるゴム）、ゴルフクラブのグリップ等のように直接
人体に接触させて使用し、しかも強度を必要とするもの
の用途に好適に適用することができる。As described above, according to the rubber composition of the present invention and the method for producing a rubber product using the same, high strength can be obtained by blending deproteinized natural rubber with a predetermined amount of keratin and / or casein. It is possible to obtain a safe rubber product that has and does not cause allergies. Therefore,
Used in direct contact with the human body, such as rubber artificial organs, gloves, condoms, catheters, accessories (rubber used as accessory for accessories such as piercings and earrings), and grips of golf clubs. It can be suitably applied to the intended use.
【００２６】また、本発明の方法によれば、脱蛋白天然
ゴムラテックスにケラチンおよび／またはカゼインを水
溶液の形態で配合するだけであるから、簡単にゴム製品
を製造することができる。しかも、従来のような加硫工
程を必要としないので、大掛かりな加硫設備が不要とな
るという効果がある。Further, according to the method of the present invention, since the deproteinized natural rubber latex is merely blended with keratin and / or casein in the form of an aqueous solution, a rubber product can be easily produced. Moreover, since a conventional vulcanization step is not required, there is an effect that a large-scale vulcanization facility is unnecessary.
Claims (3)
ム１００重量部に、ケラチンおよび／またはカゼインを
固形分で０．５〜２０重量部配合したことを特徴とする
ゴム組成物。1. A rubber composition comprising 100 parts by weight of deproteinized natural rubber containing substantially no protein and 0.5 to 20 parts by weight of keratin and / or casein in solid content.
求項１記載のゴム組成物。2. The rubber composition according to claim 1, wherein the deproteinized natural rubber is in an unvulcanized state.
ムラテックスにケラチンおよび／またはカゼインの水溶
液を、ゴム固形分１００重量部に対して固形分で０．５
〜２０重量部の割合で加えた後、成形・乾燥することを
特徴とするゴム製品の製造方法。3. A deproteinized natural rubber latex containing substantially no protein, and an aqueous solution of keratin and / or casein are added in a solid content of 0.5 to 100 parts by weight of the rubber solid content.
A method for producing a rubber product, which comprises molding the composition in an amount of 20 parts by weight, followed by molding and drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15137294A JPH0812814A (en) | 1994-07-01 | 1994-07-01 | Rubber composition and production of rubber product used therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15137294A JPH0812814A (en) | 1994-07-01 | 1994-07-01 | Rubber composition and production of rubber product used therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0812814A true JPH0812814A (en) | 1996-01-16 |
Family
ID=15517124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15137294A Pending JPH0812814A (en) | 1994-07-01 | 1994-07-01 | Rubber composition and production of rubber product used therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0812814A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09249863A (en) * | 1996-03-14 | 1997-09-22 | Sumitomo Rubber Ind Ltd | Adhesive and tackifier |
| WO2010071106A1 (en) | 2008-12-15 | 2010-06-24 | 住友ゴム工業株式会社 | Natural rubber and manufacturing method thereof, rubber composition and pneumatic tire utilizing the same, modified natural rubber and manufacturing method thereof, and rubber composite for covering threads or carcass cords and pneumatic tire utilizing the same |
| EP2366558A1 (en) | 2010-03-17 | 2011-09-21 | Sumitomo Rubber Industries, Ltd. | Tire rubber composition and heavy-load tire |
| US8857482B2 (en) | 2011-07-28 | 2014-10-14 | Sumitomo Rubber Industries, Ltd. | Rubber composition for tread, method for producing the same, and heavy-load tire |
| US8875765B2 (en) | 2011-10-25 | 2014-11-04 | Sumitomo Rubber Industries, Ltd. | Rubber composition for clinch apex and pneumatic tire |
| WO2014188901A1 (en) | 2013-05-23 | 2014-11-27 | 住友ゴム工業株式会社 | Pneumatic tire, studless tire, method for manufacturing pneumatic tire, and method for manufacturing studless tire |
| US8952091B2 (en) | 2010-01-18 | 2015-02-10 | Sumitomo Rubber Industries, Ltd. | Rubber composition for inner liner and pneumatic tire |
| US9068060B2 (en) | 2013-01-10 | 2015-06-30 | Sumitomo Rubber Industries, Ltd. | Composite and method for producing the same, rubber composition, and pneumatic tire |
| US9181355B2 (en) | 2010-06-10 | 2015-11-10 | Sumitomo Rubber Industries, Ltd. | Modified natural rubber, method for producing same, rubber composition, and pneumatic tire |
| US9217075B2 (en) | 2012-01-24 | 2015-12-22 | Sumitomo Rubber Industries, Ltd. | Rubber composition for tire, and pneumatic tire |
| EP3015283A2 (en) | 2014-10-08 | 2016-05-04 | Sumitomo Rubber Industries Limited | Rubber composition for tires and pneumatic tire |
| US9410033B2 (en) | 2011-11-11 | 2016-08-09 | Sumitomo Rubber Industries, Ltd. | Rubber composition for undertread, and pneumatic tire |
| US10336890B2 (en) | 2014-03-17 | 2019-07-02 | Sumitomo Rubber Industries, Ltd. | Rubber composition for studless winter tires, and studless winter tire |
-
1994
- 1994-07-01 JP JP15137294A patent/JPH0812814A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09249863A (en) * | 1996-03-14 | 1997-09-22 | Sumitomo Rubber Ind Ltd | Adhesive and tackifier |
| WO2010071106A1 (en) | 2008-12-15 | 2010-06-24 | 住友ゴム工業株式会社 | Natural rubber and manufacturing method thereof, rubber composition and pneumatic tire utilizing the same, modified natural rubber and manufacturing method thereof, and rubber composite for covering threads or carcass cords and pneumatic tire utilizing the same |
| KR20110103946A (en) | 2008-12-15 | 2011-09-21 | 스미토모 고무 고교 가부시키가이샤 | Natural rubber and manufacturing method thereof, rubber composition and pneumatic tire utilizing the same, modified natural rubber and manufacturing method thereof, and rubber composite for covering threads or carcass cords and pneumatic tire utilizing the same |
| US8658728B2 (en) | 2008-12-15 | 2014-02-25 | Sumitomo Rubber Industries, Ltd. | Natural rubber and method for producing the same, rubber composition and pneumatic tire using the same, modified natural rubber and method for producing the same, and rubber composition for tread or for covering carcass cord and pneumatic tire using the same |
| US8952091B2 (en) | 2010-01-18 | 2015-02-10 | Sumitomo Rubber Industries, Ltd. | Rubber composition for inner liner and pneumatic tire |
| EP2366558A1 (en) | 2010-03-17 | 2011-09-21 | Sumitomo Rubber Industries, Ltd. | Tire rubber composition and heavy-load tire |
| US8163821B2 (en) | 2010-03-17 | 2012-04-24 | Sumitomo Rubber Industries, Ltd. | Tire rubber composition and heavy-load tire |
| US9181355B2 (en) | 2010-06-10 | 2015-11-10 | Sumitomo Rubber Industries, Ltd. | Modified natural rubber, method for producing same, rubber composition, and pneumatic tire |
| US8857482B2 (en) | 2011-07-28 | 2014-10-14 | Sumitomo Rubber Industries, Ltd. | Rubber composition for tread, method for producing the same, and heavy-load tire |
| US8875765B2 (en) | 2011-10-25 | 2014-11-04 | Sumitomo Rubber Industries, Ltd. | Rubber composition for clinch apex and pneumatic tire |
| US9410033B2 (en) | 2011-11-11 | 2016-08-09 | Sumitomo Rubber Industries, Ltd. | Rubber composition for undertread, and pneumatic tire |
| US9217075B2 (en) | 2012-01-24 | 2015-12-22 | Sumitomo Rubber Industries, Ltd. | Rubber composition for tire, and pneumatic tire |
| US9068060B2 (en) | 2013-01-10 | 2015-06-30 | Sumitomo Rubber Industries, Ltd. | Composite and method for producing the same, rubber composition, and pneumatic tire |
| WO2014188901A1 (en) | 2013-05-23 | 2014-11-27 | 住友ゴム工業株式会社 | Pneumatic tire, studless tire, method for manufacturing pneumatic tire, and method for manufacturing studless tire |
| US9862814B2 (en) | 2013-05-23 | 2018-01-09 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire, studless tire, method for manufacturing pneumatic tire, and method for manufacturing studless tire |
| US10336890B2 (en) | 2014-03-17 | 2019-07-02 | Sumitomo Rubber Industries, Ltd. | Rubber composition for studless winter tires, and studless winter tire |
| EP3015283A2 (en) | 2014-10-08 | 2016-05-04 | Sumitomo Rubber Industries Limited | Rubber composition for tires and pneumatic tire |
| US10138359B2 (en) | 2014-10-08 | 2018-11-27 | Sumitomo Rubber Industries, Ltd. | Rubber composition for tires and pneumatic tire |
| US10538647B2 (en) | 2014-10-08 | 2020-01-21 | Sumitomo Rubber Industries, Ltd. | Rubber composition for tires and pneumatic tire |
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