CN111763383B - Good-touch glass fiber reinforced polypropylene composite and preparation method thereof - Google Patents
Good-touch glass fiber reinforced polypropylene composite and preparation method thereof Download PDFInfo
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- CN111763383B CN111763383B CN202010912798.2A CN202010912798A CN111763383B CN 111763383 B CN111763383 B CN 111763383B CN 202010912798 A CN202010912798 A CN 202010912798A CN 111763383 B CN111763383 B CN 111763383B
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
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- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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- C08J2323/14—Copolymers of propene
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
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- C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2453/02—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
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- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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Abstract
The invention relates to a good-touch glass fiber reinforced polypropylene compound and a preparation method thereof, wherein the good-touch glass fiber reinforced polypropylene compound comprises the following steps: polypropylene, a toughening agent A, a toughening agent B, glass fiber, maleic anhydride graft, a nucleating agent, an antioxidant and a light stabilizer. According to the invention, by adding the unique compound toughening agent, the precipitation and stickiness properties of the produced good-touch polypropylene material are obviously improved, the requirements of the material standard PV1306 of the public can be met, the performance bottleneck is broken through, and the application field of the reinforced polypropylene in plastic parts on automobiles is greatly widened.
Description
Technical Field
The invention belongs to the field of polypropylene modification, and particularly relates to a good-touch glass fiber reinforced polypropylene compound and a preparation method thereof.
Background
As one of five general resins, polypropylene has the advantages of light weight, easy processing, good chemical resistance and the like, and is widely applied to the industrial fields of chemical industry, electrical appliances, packaging and the like. However, as the demand of polypropylene in the industries of construction, automobile, ship, etc. is gradually expanding, people put forward higher requirements on the material performance, and polypropylene generally meets more applications through modification modes such as reinforcement, toughening, blending, etc.
The automobile instrument panel can be divided into a hard plastic instrument panel and a soft cladding instrument panel according to comfort. The hard plastic instrument panel is generally a single-layer structure plastic instrument panel formed by direct injection molding, and PP or TPO (acrylonitrile-butadiene-styrene) is mostly adopted (ABS is rarely adopted). The method is widely applied due to the advantages of simple process, low investment and the like. The good touch material is a brand new technical scheme developed in recent years for applying automotive interior parts, and compared with the traditional automotive TPO interior material, the material has the characteristics of soft touch, low gloss, good scratch resistance, high rigidity and the like, and can overcome the defects of strong plastic sense, high gloss, poor scratch resistance and the like of the traditional TPO material. Compared with a soft instrument board, particularly a slush molding instrument board, the good touch material has the advantages of recoverability and high cost performance. The idea of the formula of the good touch material is to adopt the idea of PP + glass fiber to improve the rigidity of the material, and simultaneously add the elastomer with higher proportion to improve the touch of the material and reduce the glossiness of the material. However, the problem of the material becoming tacky when exposed to the sun is caused by the increase of the elastomer content in the production process of the good-touch glass fiber reinforced polypropylene, and the current solution is basically to reduce the elastomer content, but the touch of the material is obviously reduced by the methods. How to improve the precipitation and stickiness properties of the material under the condition of maintaining the mechanical properties of the good-touch glass fiber reinforced polypropylene is a problem to be solved urgently by the short glass fiber reinforced material.
Disclosure of Invention
The invention aims to solve the technical problem of providing a good-touch glass fiber reinforced polypropylene compound and a preparation method thereof, wherein the material has excellent rigidity and toughness balance, maintains the mechanical property and touch of the material and improves the precipitation and stickiness of the material.
The invention provides a good-touch glass fiber reinforced polypropylene compound which comprises the following components in parts by weight:
40-70 parts of polypropylene;
5-20 parts of a toughening agent A;
5-20 parts of a toughening agent B;
5-30 parts of glass fiber;
1-5 parts of maleic anhydride graft;
0.05-1.0 part of nucleating agent;
0.1-0.5 part of antioxidant;
0.1-0.5 part of light stabilizer;
wherein the toughening agent A is a copolymer of ethylene and an alpha-olefin containing 3 to 10 carbon atoms; the toughening agent B is a styrene block copolymer, and the content of styrene is 20-30%.
The polypropylene is homo-polypropylene or co-polypropylene, and the melt index is 30-100g/10min at 230 ℃ under the test condition of 2.16 kg. Preferably a co-polypropylene.
The melt index of the toughening agent A is 0.5-30g/10min under the test conditions of 190 ℃ and 2.16 kg.
The glass fiber is chopped alkali-free glass fiber, the length is 3.0-9.0mm, and the diameter is 7-17 μm. S-1 glass fiber is preferred.
The nucleating agent is at least one of sorbitol nucleating agent, organic phosphate nucleating agent and talcum powder.
The antioxidant is at least one of phenol, amine, phosphite and hindered phenol antioxidants.
The light stabilizer is at least one of hindered amine, benzotriazole, benzophenone and triazine benzylidene malonate light stabilizers.
The invention also provides a preparation method of the good-touch glass fiber reinforced polypropylene compound, which comprises the following steps:
according to the weight portion, the raw materials except the glass fiber are uniformly premixed, the mixture is put into a double-screw extruder from a main feeding port, the glass fiber is fed into the double-screw extruder from the 7 th to the 9 th sections of screw cylinders in a side feeding mode, and then the mixture is subjected to melt extrusion and granulation to obtain the good-touch glass fiber reinforced polypropylene compound.
The technological parameters of the double-screw extruder are set as follows: the length-diameter ratio is 40: 1-48: 1; the temperature of a first area of the main machine is 100-120 ℃, the temperature of a second area is 200-220 ℃, the temperature of a third area is 200-220 ℃, the temperature of a fourth area is 200-220 ℃, the temperature of a fifth area is 200-220 ℃, the temperature of a sixth area is 180-200 ℃, the temperature of a seventh area is 180-200 ℃, the temperature of an eighth area is 180-200 ℃, the temperature of a ninth area is 200-220 ℃, and the temperature of a tenth area is 200-220 ℃; the rotation speed of the main machine is 200-350 rpm.
The invention also provides application of the good-touch glass fiber reinforced polypropylene compound.
Advantageous effects
According to the invention, by adding the unique compound toughening agent, the precipitation and stickiness properties of the produced good-touch polypropylene material are obviously improved, the tensile strength is more than 30MPa, the flexural modulus is more than 200MPa, and the notch impact is more than or equal to 30kJ/m2And the separated stickiness can reach level 1, the requirement of the material standard PV1306 of the public can be met, the performance bottleneck is broken through, and the application field of the reinforced polypropylene on plastic parts on automobiles is greatly widened.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The materials used in the examples and comparative examples are as follows:
polypropylene resin: the homo-polypropylene is produced by PP M60RHC Zhenhai refining, and the melt index is 65 g/10min (ISO 1133);
a toughening agent A: POE 7467 Dow chemical production, melt index 1.0g/10min (2.16 KG/190 ℃);
a toughening agent B: styrene block copolymer kraton, SEBS G1657 styrene content 13%, SEBS MD1653 styrene content 30%;
maleic anhydride graft: manufactured by the company aco ;
glass fiber: selecting a product with the model number of T538A produced by Taishan glass fiber company Limited, wherein the chopped length is 4.5mm, and the average diameter is 13 mu m;
nucleating agent: TMP-5, produced by the institute of chemical engineering, Shanxi province;
antioxidant: antioxidant 1010, zhengzhou jiajie chemical products limited; antioxidant 168, basf;
light stabilizer: UV-3808PP5, Shanghai Yisheng chemical Co., Ltd;
the preparation method comprises the following steps:
uniformly premixing raw materials except the chopped glass fibers, and putting the raw materials into a main feeding port of a double-screw extruder from the main feeding port, wherein the chopped glass fibers are put into a side feeding port by a side feeding device;
the length-diameter ratio of the twin-screw extruder is 40: 1. The temperature of the first section is 110 ℃, the temperature of the second section is 200 ℃, the temperature of the third section is 200 ℃, the temperature of the fourth section is 200 ℃, the temperature of the fifth section is 200 ℃, the temperature of the sixth section is 200 ℃, the temperature of the seventh section is 200 ℃, the temperature of the eighth section is 200 ℃, the temperature of the ninth section is 200-220 ℃, the temperature of the tenth section is 200 ℃, and the rotation speed of a main engine is 300 rpm.
Examples 1 to 3 and comparative examples 1 to 4 polypropylene compositions were prepared according to the formulation shown in table 1 by the above-mentioned method, and then the compositions were injection-molded into corresponding sample bars according to respective test standards, and the tensile strength, flexural modulus and impact strength of a simple beam notch of the material were respectively tested, and PV1306 was performed using a small color plate.
The performance test method comprises the following steps:
tensile strength: ISO 527;
flexural modulus: ISO 178;
notched impact strength: DIN EN 179-1;
and (4) separating out and sticking: PV 13065 cycles.
TABLE 1 formulation of Polypropylene compositions of the examples and comparative examples
TABLE 2 test data Table for examples and comparative examples
From the test results in table 2, it can be derived: the experimental results of the examples 1 to 3 show that the POE and SEBS compounding technology can meet the requirement of mass PV1306 release stickiness on the premise of meeting the mechanical property, and the comparison between the example 2 and the comparative example 2 and the comparison between the example 3 and the comparative example 3 can show that the MD1653 with the polystyrene content of 30% of the block copolymer used can meet the release stickiness, the SEBS G1657 can fail to release stickiness, and the experimental results between the example 3 and the comparative examples 1 and 4 can show that the elastomer compounding mode can meet the release stickiness requirement without affecting the performance.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.
Claims (10)
1. A fine-touch glass fiber reinforced polypropylene compound is characterized in that: the paint comprises the following components in parts by weight:
40-70 parts of polypropylene;
5-20 parts of a toughening agent A;
10-20 parts of a toughening agent B;
5-30 parts of glass fiber;
1-5 parts of maleic anhydride graft;
0.05-1.0 part of nucleating agent;
0.1-0.5 part of antioxidant;
0.1-0.5 part of light stabilizer;
wherein, the toughening agent A is POE; the toughening agent B is SEBS, wherein the content of styrene is 30%.
2. The compound of claim 1, wherein: the polypropylene is homo-polypropylene or co-polypropylene, and the melt index is 30-100g/10min at 230 ℃ under the test condition of 2.16 kg.
3. The compound of claim 1, wherein: the melt index of the toughening agent A is 0.5-30g/10min under the test conditions of 190 ℃ and 2.16 kg.
4. The compound of claim 1, wherein: the glass fiber is chopped alkali-free glass fiber, the length is 3.0-9.0mm, and the diameter is 7-17 μm.
5. The compound of claim 1, wherein: the nucleating agent is at least one of sorbitol nucleating agent, organic phosphate nucleating agent and talcum powder.
6. The compound of claim 1, wherein: the antioxidant is at least one of phenols, amines and phosphites.
7. The compound of claim 1, wherein: the light stabilizer is at least one of hindered amine, benzotriazole, benzophenone and triazine benzylidene malonate light stabilizers.
8. A method for preparing the fine glass fiber reinforced polypropylene composite of claim 1, comprising:
according to the weight portion, the raw materials except the glass fiber are uniformly premixed, the mixture is put into a double-screw extruder from a main feeding port, the glass fiber is fed into the double-screw extruder from the 7 th to the 9 th sections of screw cylinders in a side feeding mode, and then the mixture is subjected to melt extrusion and granulation to obtain the good-touch glass fiber reinforced polypropylene compound.
9. The method of claim 8, wherein: the technological parameters of the double-screw extruder are set as follows: the length-diameter ratio is 40: 1-48: 1; the temperature of a first area of the main machine is 100-120 ℃, the temperature of a second area is 200-220 ℃, the temperature of a third area is 200-220 ℃, the temperature of a fourth area is 200-220 ℃, the temperature of a fifth area is 200-220 ℃, the temperature of a sixth area is 180-200 ℃, the temperature of a seventh area is 180-200 ℃, the temperature of an eighth area is 180-200 ℃, the temperature of a ninth area is 200-220 ℃, and the temperature of a tenth area is 200-220 ℃; the rotation speed of the main machine is 200-350 rpm.
10. Use of the fine-touch glass fiber reinforced polypropylene composite of claim 1 in plastic parts for automobiles.
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| CN112679859B (en) * | 2020-12-11 | 2022-11-18 | 上海金发科技发展有限公司 | Transparent polypropylene composite material for new energy automobile and preparation method thereof |
| CN114163737A (en) * | 2021-12-27 | 2022-03-11 | 昆山禾振瑞新复合材料有限公司 | Glass fiber modified polypropylene suitable for automotive interior instrument panel and preparation method thereof |
| CN116063796A (en) * | 2022-12-29 | 2023-05-05 | 上海普利特复合材料股份有限公司 | Scratch-resistant, precipitation-resistant and photo-aging-resistant glass fiber reinforced polypropylene composite material for automobile upright posts and preparation method thereof |
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| CN102140202A (en) * | 2011-04-26 | 2011-08-03 | 苏州工业园区润佳工程塑料有限公司 | Anti-sticking polypropylene composite material and preparation method thereof |
| CN105885208A (en) * | 2014-12-09 | 2016-08-24 | 吉林恒辉新材料有限公司 | Anti-sticking polypropylene composite material and preparation method thereof |
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