JPS5958079A - Bituminous waterproofing material - Google Patents

Abstract

PURPOSE:To provide a bituminous waterproofing material applicable at normal temperature, decomposable and curable rapidly, having excellent film-forming property, and capable of forming a waterproofing bituminous elastomer layer having excellent water resistance, wheatherability durability, etc., by mixing a cationic bitumen emulsion with a mixture of bitumen latex emulsion and a filler. CONSTITUTION:The objective waterproofing material is prepared from (A) a mixture of (i) an anionic or nonionic bitumen latex containing bitumen such as straight asphalt and a latex such as natural rubber latex and (ii) a filler such as clay and (B) an O/W-type cationic bitumen emulsion composed of bitumen and a cationic surface active agent as at least a part of emulsifiers. For example, the component (A) and the component (B) are mixed together and applied to the waterproofing substrate before the decomposition of the mixture takes place, or the component (A) and the component (B) are sprayed through separate nozzles and the mixed spray is applied to the waterproofing substrate.

Description

[Detailed description of the invention] The present invention can be constructed at room temperature, which is suitable for civil engineering and architectural waterproofing.
This invention relates to a bituminous elanuttomer waterproofing material that can form a water layer of bituminous elanuttomer, which is quick to decompose and harden, has good film-forming properties, and has excellent VC such as water resistance, weather resistance, and durability.

Recently, as an alternative to the asphalt waterproofing method using the thermal method, a construction method has been developed and implemented in which a waterproof layer is formed by mixing an asphalt coating emulsion with a particulate agent and spraying the mixture onto a waterproof base. These knob methods include a mixture of asphalt emulsion and high-concentration co-laminated latex, i.e., a method using a bituminous latte-yx emulsion together with a water-soluble salt (decomposer), and a high-concentration asphalt latex emulsion in which bituminous material is emulsified in coum latex. There is a method of using sodium silifluoride or a dispersion of sodium silifluoride in oil, oil latex, etc. (decomposition agent). In addition, there is also a method of using a polyisocyanate compound as a decomposing agent. These methods use a bituminous latex emulsion in combination with a decomposing agent, so the emulsion decomposes and hardens in a short period of time, allowing a waterproof layer to be formed quickly.The decomposing agent also prevents natural water evaporation (natural drying). Since the film is formed by one-time decomposition and curing without any build-up, it has the advantage of being able to form a waterproof layer even on a wet substrate. However, in these conventional construction methods, if the decomposition liquid comes into contact with the iron material, it may accelerate the corrosion of the iron material or may cause health problems for the human body when handled. Also, these waves 1! Blue latex 'IL? The waterproofing method by IK did not strengthen the coating film through vulcanization, prevent aging, or strengthen it with fillers, and there was room for improvement.

The purpose of the present invention is to eliminate these drawbacks, and to achieve rapid decomposition and hardening when applied at room temperature, good water release, good film forming properties, clear water separated during decomposition and hardening, and The compatibility of the latex polymer with the I14 blue of the waterproof layer formed as a film, the compatibility with the bituminous polymer phase and the compatibility with the Iv material, etc., and the latex emulsion system with improved physical properties of the waterproof layer. 1゜And the dud 11JI, which provides a waterproof material, consists of (a) an anionic or nonionic bituminous latex emulsion containing a green substance and latex mixed with a filler, and (b) a cationic bituminous latex emulsion. The gist of this invention is a bitumen-based waterproofing material that is characterized by being mixed with a bituminous emulsion.

Anionic or nonionic bituminous emulsion (a) containing warm blue matter and latex used in the present invention (
Bituminous latex emulsion (simply referred to as bituminous latex emulsion) is a mixture of anionic or nonionic bituminous emulsion and anionic or nonionic latex, or a bituminous material dispersed in the form of fine particles in the aqueous phase of anionic or nonionic latex. or a mixture thereof.

The bitumen emulsion used in the bitumen latex emulsion includes petroleum asphalts such as Nutley 1-asphalt, flown asphalt, semi-prone asphalt, propane asphalt, natural asphalts, tar), asphalt,
Bituminous products made from pitch, gills, etc./C111F or a mixture of two or more of these (mineral oil, animal 41α oil, pine oil, pine oil, anthracene oil, creole oil, etc.) Clam extract mixed with sorting oil, plasticizer, process oil, etc., or these raw materials mixed with rubber, synthetic high molecular polymer, D''-shaped rubber, petroleum resin, coumaron intene resin,
The warm blue material modified by adding lotin and its derivatives etc. is emulsified with ionic Wi7ri activator and nonionic surfactant, and if necessary, UIS is used as an emulsifying agent and dispersion. It is emulsified in water using appropriate agents, stabilizers, hφ colloids, etc. 3. The latex used for bitumen latex emulsion is anionic or nonionic rubber latex or synthetic polymer emulsion. /Con. Examples include natural comb latex, styrene/butadiene rubber (SBR), polybutace/comb (131e), styrene/isoprene rubber (
Synthetic rubber latex such as SIR), isoprene rubber (IR), acrylonitrile-butadiene rubber (NBR), chloroprene rubber (CR), and butyl rubber (II4), as well as synthetic hV of these rubbers, carboxyl/rubber latex, Polyacrylate latex, butadiene/acrylate copolymer latex, carboxylated latex thereof, styrene/butadiene resin copolymer latex, styrene/butadiene/vinylpyridine copolymer latex, vinylidene chloride resin, vinylidene resin, Vinyl chloride/vinyl acetate copolymer resin, vinyl acetate resin, acrylate/vinyl acetate copolymer resin, acrylic acid ester resin, styrene-acrylate-1 copolymer resin, ethylene/azirylate copolymer resin, ethylene/vinyl acetate copolymer Latex or emulsion such as resin, polyethylene, polyurethane, etc.

The bitumen emulsion used in the present invention can be made by mixing the above-mentioned bituminous emulsion and latex, or it can be made by mixing a heated and melted warm blue material with the latex and dispersing the bituminous material into fine particles in the aqueous phase of the latex. can. It is also possible to use a combination of these methods. When applying the bitumen latex emulsion or after making it, emulsifiers, emulsifiers, dispersants, thickeners, and preservative colloids can be added as necessary.3. , water-sprayable or water-dispersible synthetic resin (fat, etc. can also be added).

7 Bituminous latex emulsion is an oil-in-water type emulsion that contains bitumen particles and particles of rubber or synthetic polymer in the aqueous phase, and they are either negatively charged or charged. In other words, it is either anionic or nonionic. Is there any problem with latex emulsion? The ratio of blue melting material and rubber synthetic polymer in the + is determined by taking into account the evaporation residue (warm blue material) of the cationic bitumen emulsion (described later), and taking into account fillers, etc. In general, in the sum of the nonvolatile matter of the θ11・z blue tex emulsion, the cationic oil, and the evaporation residue of the blue emulsion, com, synthetic polymers, etc. are contained in an amount of 3 to 100 parts by weight per 100 parts by weight of the blue melting material. It is within the range of .

Filler compounded in J blue tex emulsion is filler,
These include vulcanizing agents, vulcanization accelerators, and anti-aging agents. rW%
Latex emulsion mixed with filler (hereinafter referred to as medium VC
C-filled bituminous latex emulsion) is the above-mentioned al.
・Add and mix fillers, vulcanizing agents, vulcanization accelerators, anti-aging agents, etc. to the ["rI]' latex emulsion, and add Nikohachi to the latex, and then make a σ1.ri blue emulsion. It can also be obtained by adding and mixing.

These fillers and the like are dispersed in the aqueous phase of the bituminous latex emulsion. To facilitate dispersion, anionic or nonionic surfactants, emulsifiers, milk aids, dispersants, stabilizers, thickeners, wetting agents, water, etc. can be added.

Examples of fillers include short fibers such as inorganic fibers, natural fibers, synthetic fibers, carbon fibers, carbon blanks, graphite powder,
Clay, talc, carbonated lime powder, slaked lime, mica powder, crushed stone powder, glue powder, iron powder, bentonite, amine-treated base/
tonite, face #1, extender pigment, etc.

Vulcanizing agents, vulcanization accelerators, anti-aging agents, etc. commonly used in glass, rubber, and plastic materials can be used. For example, vulcanizing agents include sulfur, i.e., colloidal sulfur, precipitated sulfur, and metal acid additives such as zinc oxide. Vulcanization accelerators include Kuaninka'1, thiurams,
It is dithiocarbamine HLm 5t+. Examples of anti-aging agents include argylphenols, amines, and imidazoles.

These fillers, vulcanizing agents, vulcanization accelerators, anti-aging agents, etc., are added to the Wan-Ao-Tex-Niyu-Oki 1, and the total amount of the additives is about 1 to 30% by weight. The amounts of the vulcanizing agent, vulcanization accelerator, aging J'J1 additive, etc. are about the same as those used for latex rubber, etc.1. Emulsion U is an oil-in-water bituminous emulsion prepared by using the aforementioned tthq green matter (including modified green matter, etc.) using a cationic surfactant as at least a part of the emulsifier4. In addition, in order to improve these cationic deep blue emulsions, cationic or nonionic rubbers, synthetic polymers,
A mixture of latex emulsions such as synthetic resins can also be used as the cationic bitumen emulsion in the present invention. Cationic bitumen emulsions can be produced with divine properties depending on the type of bitumen, the type and amount of emulsifier, etc., and these can also be used. Based on the type of starting material, it can be roughly divided into asphalt-based and tar-based, but the bituminous material for cationic bituminous emulsion is preferably the same type as the bituminous material for bituminous latex emulsion.

The bituminous waterproofing material of the present invention comprises the above-mentioned filler-containing bituminous latex emulsion (hereinafter referred to as component a) and the cationic bituminous emulsion (
(hereinafter referred to as component b), and both components are mixed together when used. When component a and component 1) are mixed, %'aW: Neutralization of charge and aggregation of 119 particles such as green matter and goto, adsorption of cationic r & blue emulsion to filler, etc., and aggregation proceed simultaneously. , the mixture of both decomposes rapidly and uniformly, separating the water.

Therefore, in use, mix component (1)a and component 1] and apply it to the waterproof base before it decomposes to an appropriate size. (
11) Using a plurality of spray nozzles, spray component a and component b from separate nozzles, mix the ahy component and component b in front of the nozzles, and apply to the waterproof base. (iii)
A method is used, such as spraying component A and component B onto a waterproof base so that both components are mixed. When the bituminous waterproof material of the present invention is applied to a waterproof base in this manner, a uniform and continuous coat can be formed. This coating film quickly decomposes and separates water, and the excitation material and solid latex are uniformly mixed and integrated, and furthermore, fillers, etc. are uniformly mixed into this to form a waterproof coating. do. This waterproof membrane separates water quickly and dries quickly. And you can apply it quite thickly to the pen. Over time, due to the effects of vulcanizing agents, anti-aging tL agents, fillers, etc., waterproofness improves.
Excellent weather resistance and durability (capable of forming a 7° water layer).

Next, the features and effects of the τ bitumen waterproofing material of the present invention will be explained.

(It is an anionic or nonionic bitumen latex emulsion containing a filler, a vulcanizing agent, a vulcanization accelerator, an anti-aging agent, etc., which is an anionic or nonionic bituminous latex emulsion)
It is a two-component yarn with a cationic bituminous emulsion as the b component, and both components are mixed together before use. This prevents the emulsion from decomposing due to fillers, etc. during storage, and also contains fillers, vulcanizing agents, vulcanization accelerators, and anti-aging agents necessary for reinforcing the waterproof material and improving durability. etc. 1. t1
People could.

(2) When mixing component a and single component, the filler in component a improves the mixing of both components. When both components are mixed, the charges of the dispersed particles of the emulsions of both components are neutralized and agglomerated, and the cationic positive +'; blue emulsion is adsorbed and agglomerated to the dispersed particles 7 of the filler, etc., which also causes emulsion. To promote the decomposition of
In a mixed system of both components, the entire emulsion is distributed evenly without any undecomposed residue remaining! +171 ~ At the same time, it separates clear water, heats the water well, and has very good film forming properties. When both components are mixed and immediately applied to a concrete surface, steel plate surface, etc., the recoating separates clear water and forms a film containing bitumen, rubber, etc., evenly mixed with fillers, etc. This film is continuous and has excellent elasticity and waterproof properties, and even when the film is stretched, each component is mixed homogeneously and is good.

It dries quickly, does not blister, and can be applied thickly.

(3) In a coating film made from waterproofing materials, the emulsifiers in both component emulsions are consumed and become hydrophobic, and the fillers mixed in the coating film are also coated with the cationic bituminous emulsion and become hydrophobic. It has a good affinity with bituminous particles, etc., and can form a coating film with excellent water-based and waterproof properties. 3. (1) The waterproof base is It adheres well even when it is wet or dry. The texture of the paint film is good.

In areas where the base is damp or does not dry,
A waterproof film can be formed by simultaneously blowing away component a and component b to decompose them. Decomposition of the emulsion of both components is ensured,
It is quick and has good moisture m1r, and the coating film can be formed by adhering well to the base without floating.

(5) Over time, the coating film made of waterproofing material will undergo reinforcement effects due to fillers, vulcanization agents, vulcanization accelerators, etc.
Weather resistance and durability are significantly improved due to cross-linking, anti-oxidation by anti-aging agents, and anti-fatigue effects.

(6) The waterproof layer formed by the waterproof layer contains fillers, vulcanizing agents, vulcanization accelerators, anti-aging agents, etc. in the film-forming components mixed with bitumen, rubber, synthetic polymers, etc. are mixed, the surface is non-adhesive and adhesive, 1liiii heat condition, +iiij
Cold weather, iI shock 96, etc. immediately n '''c-.

(7) Waterproofing materials should be installed at room temperature and without the use of fire. Furthermore, even if exposed to fire, it will not catch fire or explode, making it safe to handle. Additionally, the water generated during construction is clear and contains no harmful substances. ``Also, it has excellent features and effects such as being easy to apply and waterproof even if the base is uneven, a flat surface, a rising surface, or a ceiling.

The bituminous waterproofing material of the present invention can be used alone to form a waterproof layer on a waterproof base, but it can also be used in combination with a primer, or in combination with netted notebook, nonwoven fabric, etc. to form a waterproof layer. . Moreover, it can also be used in combination with a foamed plastic heat insulating material or the like to form an elastic waterproof layer.

The bituminous waterproofing material of the present invention can be widely applied to waterproofing of civil engineering and architectural structures, buildings, etc.;
It can also be applied to corrosion prevention and waterproof coating of pipelines, etc. 1. Example straight asphalt (penetration (25℃), +26)
, water 1009: emulsified with an emulsion containing 4 parts by weight of a polyoxy/ethylene nonylphenol activator and alkylnaphthalene sulfonate type 3 dissolved in the groin area, and a noniono-based 7 sulfate with an evaporation residue amount of 657jj. 7A l-emulsion is prepared. This asphalt!・Mix 70 parts by weight of emulsion and 30 parts by weight of concentrated natural rubber latex (nonvolatile content: 65%, 2.4%), and further add 0.5 parts by weight of anti-aging agent Antigen D (trade name manufactured by Sumitomo Chemical) and asbestos powder. An asphalt latex emulsion was prepared by mixing 2 parts by weight and 3 parts by weight of clay and filling the mixture, and this was designated as emulsion A.

Cationic asphalt emulsion Mr<-+ (JIS) (2
208 Petroleum asphalt emulsion cationic emulsion MK-1
Equivalent product, evaporation residue 60 double interlace, evaporation residue penetration (
25°C) +10) is designated as emulsion B.

By mixing 100 parts by weight of emulsion A and 50 parts by weight of emulsion B, the TL of the present invention obtains a good water yield. This was applied to emulsion A and emulsion B (immediately after combining 11+Z, it was applied to a wet concrete surface and a dry surface, but it was immediately separated and removed, and a good 1υ was obtained within 20 minutes). An aqueous layer was obtained.

Example 2 Emulsion A used in Example 1 is referred to as Emulsion A.

Chloroprene rubber latex Neoprene 950 (manufactured by Showa Neoprene, cationic, non-volatile content 50 parts by weight) in 50 parts by weight of water.
Straight asphalt (penetration (25°C) 132) 1 which was heated and melted with 50 parts by weight (% by weight), 1 part by weight of beef tallow propylene diamine, and 3 parts by weight of acetic acid.
50 parts by weight of the asphalt was passed through an emulsifying machine to emulsify the asphalt to produce an asphalt latex emulsion (non-volatile content 70% by weight), which was designated as emulsion B.

Emulsion A and emulsion B were sprayed in a 1:1 ratio onto a concrete surface using a double-head gun 714, and the bituminous waterproofing material of the present invention, which was a mixture of emulsion A and emulsion B, was sprayed onto the concrete surface. It was immediately decomposed to form a film, and a good waterproof layer could be formed.

Example: 3 Anionic styrene polymeric compound (non-volatile content: 9%) and polyoxygen 7-ethylene 7-nonylphenol surfactant] i1'j 'F'i: %
straight asphalt (needle!
5° C.) 118) to prepare an asphalt latex emulsion (non-volatile content: 75% by weight, non-volatile content: about 60% by weight of asphalt). 100 parts of this asphalt latex emulsion, 05 parts of colloidal sulfur, 1 part of antigen
) and 0.3 parts by weight of 11tj accelerator ZnBDC (zinc di-11-butyldithiocarbamate) were mixed to prepare a filled Asfurol I latex emulsion, which was designated as emulsion A.

A cationic asphalt emulsion (equivalent to cationic emulsion P K-r of JIS K2208, evaporation residue: 555% by weight, penetration of evaporation residue (25°C): 105) is designated as B emulsion.

Emulsion A and emulsion B were mixed at a ratio of 1=1 using a double-headed gun to spray the bituminous waterproof layer of the present invention, which is a mixture of emulsion A and emulsion 13, onto the concrete IJ-G waterproof base surface. wear. Adhesion to the concrete surface was good, and decomposition began immediately to form a membrane, forming a good waterproof layer. By this method, the waterproofing material of the present invention was sprayed thickly at a time, approximately 50% thick at a time, and it was possible to obtain a waterproof layer that adhered well to the waterproof base surface without any sag even on the rising surface.

Example 4 Adding 1% by weight of polyoxyethylene nonylphenol surfactant to anionic acrylic ester resin emulsion (main component: acrylic ester, non-volatile content: 49% by weight)
, 1 part by weight of sodium allylnaphthalene sulfonate, 1 part by weight of sodium chloride, and to this add 1 part by weight of sodium sulfonate.
An asphalt latex emulsion (non-volatile content: 80% by weight, asphalt content in the non-volatile content: about 70% by weight) is prepared by emulsifying large dust (25°C) 128) from -1. This emulsion 100
00 parts by weight, 10 parts by weight of water, 10 parts by weight of 2-thimethyl cellulose aqueous solution, 2 parts by weight of 10% sodium hexametaphosphate aqueous solution, 3 parts by weight of asbestos, 7 parts by weight of cloud four parts, and 30 parts by weight of clay. A filler-containing asphalt latex emulsion (non-volatile content 74% by weight) was prepared by adding and mixing.
Make it into an emulsion.

The same cationic asphalt emulsion PK-1 used in Example 3 is designated as Emulsion B.

Emulsion A and emulsion B are sprayed at a ratio of 1=1 onto a concrete waterproof subsurface using a double-headed gun, and the blue 1 waterproofing material of the present invention, which is a mixture of both components, is sprayed onto the concrete surface. Immediate decomposition and film formation resulted in a good waterproof layer that adhered well to the concrete surface.

patent applicant Nichiju Chemical Industry Co., Ltd. Representative Fumio Fukushima

Claims (1)

[Claims] 1 (a) Mixing an anionic or nonionic concentrated Te Nox emulsion containing foundation blue matter and latex with DU1 filler and (b) putuchion-based bituminous emulsion 11. A bituminous waterproofing material characterized by: