JPS5927955A - Coating bituminous emulsion composition - Google Patents

Abstract

PURPOSE:To provide the titled compsn. which has good applicability and storage stability without undergoing sedimentation, can remarkably improve the vibration-damping effect and has excellent soundproofness, by dispersing ferrite powder in a clay type bituminous emulsion. CONSTITUTION:A coating bituminuous emulsion compsn. is obtd. by dispersing ferrite powder in a clay type bituminous emulsion emulsified by clay. By combining the clay type bituminous emulsion with ferrite powder having excellent vibration-damping characteristics, the ferrite powder can be uniformly dispersed in the water phase of the emulsion by structural viscosity which the clay type bituminous emulsion has, and the desired compsn. can be obtd. which has good applicability and storage stability without undergoing sedimentation, can remarkably improve the vibration-damping effect and has excellent soundproofness. This compsn. has slao radio wave absorption power and magnetic shielding power so that the compsn. is applicable to various purposes. Further, the compsn. is applicable to waterproof material, corrosionproof material, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bituminous emulsion composition for coating, which is suitable for soundproofing and corrosionproofing of vehicles, etc., and waterproofing, corrosionproofing, and soundproofing of buildings, structures, etc.

BACKGROUND ART Conventionally, bituminous coatings have been used for the purpose of soundproofing and corrosion prevention, such as in underbody coating of vehicles. These are solutions made by adding modifiers such as rubber and synthetic resins, volatile solvents, etc. to bituminous materials, and appropriately mixing asbestos, mica powder, talc, silica sand, graphite 1 halide, etc. However, regulations are gradually becoming stricter regarding solvent-based paints, especially in the painting and drying process, due to the effects of solvents on human health. What I don't want is what I want. Additionally, solvents may cause fire or explosion.
In order to be safe from fire, there is an emphasis on products that do not use solvents.

As a method that does not use a solvent, a bituminous emulsion type is considered, and its development is progressing.

The soundproofing effect of bituminous coatings is basically achieved by adding weight and stiffness to the metal plate when coated on the metal plate. Therefore, it is necessary to mix relatively large amounts of filler into the bitumen emulsion. Even if a large amount of filler is mixed in, the workability of spraying and troweling will not be affected, and there will be no sedimentation of the filler or decrease in storage stability, which tends to occur when a large amount of filler is mixed in. is desired.

Bituminous emulsion-based products have disadvantages in these respects compared to solvent-based products.

On the other hand, in recent years, technology has been developed to apply ferrite powder obtained from heavy metal-containing wastewater treatment to electromagnetic wave absorbing materials. Furthermore, the excellent vibration damping properties of ferrite powder have recently attracted attention. 71. of the present invention, ferrite powder. By taking advantage of its vibration damping properties and combining it with a clay-type bitumen emulsion, the structural viscosity of the clay-type bitumen emulsion allows the ferrite powder to be uniformly dispersed in the aqueous phase of the emulsion, resulting in storage stability and workability without sedimentation. The object of the present invention is to provide a bituminous emulsion composition for coating, which has excellent soundproofing properties and significantly improves the distribution effect. However, since the bituminous emulsion composition for coating of the present invention has radio wave absorption ability and magnetic shielding ability, it can be applied to such purposes. Furthermore, the present invention provides a bituminous emulsion composition for coating that can be applied to waterproofing and corrosion protection.

The gist of the present invention is a bitumen emulsion composition for coating, which is characterized in that ferrite powder is mixed and dispersed as a filler in a clay-based bitumen emulsion emulsified with clay.

The clay-type bitumen emulsion emulsified with clay as used in the present invention refers to an oil-in-water bitumen emulsion in which a bituminous material is emulsified using a suspension of clay dispersed in water as an emulsifying liquid, and a bituminous emulsion in which a bituminous material is emulsified using a suspension of clay dispersed in water. , latex or emulsion of synthetic polymers, and those to which water-soluble or water-dispersible resins are added.

Bituminous materials can be broadly divided into asphalt-based and coal tar-based. In the asphalt system, straight asphalt, propane IB [7 Petroleum asphalts such as spphalt, semi-blown asphalt, and blown asphalt, and natural asphalts such as Trinidad asphalt are used alone or in appropriate combinations. Modified asphalt, which is obtained by mixing crushed asphalt with rubber, synthetic polymers, etc., is also used.

Usually, straight asphalt, its modified asphalt, or a mixture of these with Trinidad Soto asphalt are used. In the coal tar type, coal tar, coal tar pitch, pitch, etc. are used as appropriate. Those that have been modified by gently mixing rubber or synthetic polymers are also used. Examples of rubber and synthetic polymers used to modify the above bituminous materials are:
Natural comb, gutta-percha, imprene rubber, butachene rubber, styrene imprene rubber, styrene butachene/rubber, chloride rubber, chloroprene rubber, butyl rubber, nitrile rubber, styrene Φ inbrene block polymer rubber,
Styrene-vinyl chloride Tft Synthetic rubber, ethylene/vinyl acetate copolymer and its partially saponified product, ethylene/acrylate copolymer, polyvinyl chloride, vinyl chloride/vinyl acetate copolymer, polyvinylidene chloride, vinylidene chloride・Vinyl chloride copolymer, acrylonitrile/styrene copolymer resin, acrylonitrile/butadiene/styrene copolymer resin, etc. When adding and mixing these polymers to bituminous materials to modify them, it is necessary to directly add and mix these polymers to the bituminous material that has been heated and melted, or to add and mix latex or emulsion, or to further disperse water. , etc.) Methods such as adding and mixing a solution of whitebait polymer are used. Process oils, pine oils, plasticizers, anthracene oils, animal and vegetable oils, drying oils, liquid rubbers, petroleum resins, derubene resins, and rosin resins can also be added and mixed with these curdled polymers.

The amount of shingle polymer added to modify the bituminous material is not more than 10% by weight of the bituminous material.

The clays used to disperse bituminous materials in water include montmorillonite, kaolinite, attutapulgite, and bentonite (montmorillonite). A suspension of clay in water has emulsifying power, and an emulsion can be prepared by dispersing bitumen into fine particles in the suspension. In this case, the standard blending ratio of the clay is 50 to 60 parts by weight of bituminous material, and the pH suitable for emulsification of the emulsion of bentonite tray dispersed in water is in the range of 5 to 9.5. It varies depending on etc. An acid, alkali, salt, etc. can be added to the emulsion as necessary to adjust the pH. In addition, pl-I can be adjusted by adding these to the emulsion by post-adding them. In addition, dispersants, protective colloids, etc. can also be added to the emulsion.

A bituminous material or a modified bituminous material obtained by adding and mixing a bituminous material with a polymer or the like can be emulsified with an emulsifying liquid as a clay VIL agent, and this bitumen emulsion can be used for the clay type bitumen emulsion of the present invention. Furthermore, the above-mentioned rubber,
Latex such as synthetic polymers, emulsions, and water-soluble or water-dispersible synthetic resins such as acrylic resins, alkyd resins, melamine resins, maleic resins, fluorocarbon resins, urea resins, etc. are added and mixed to form emulsions. Coatings with improved coating properties can also be used in the present invention. Furthermore, water, acids, alkalis, amines, salts, polymeric protective colloids, dispersants, etc. can also be added to these emulsions.

The ferrite powder used in the present invention is a magnetic ferrite powder made of a metal oxide containing iron, and may be produced by any method. An example of an economically usable ferrite powder is one in which ferrous ions are added to heavy metal-containing wastewater, which is then oxidized by blowing in air, etc., and finally turned into ferrite (precipitated as an acidic oxide). There are those that have been washed with water and dried.In the present invention, the amount of ferrite powder used for the clay-taive bitumen emulsion is 100 parts by weight of the clay-taive bitumen emulsion. On the other hand, ferrite powder is mixed in a proportion of 10 to 150, preferably 20 to 120.The ferrite powder is dispersed in the water phase of the clay-taib bitumen emulsion.The specific gravity of ferrite powder is around 5, which is heavy, but the clay-taib bitumen emulsion is heavy. can be dispersed in the aqueous phase without settling.

Thickeners such as dispersants and water-soluble polymers such as high-molecular-weight carboxyvinyl polymers can be used to adjust the pH, increase structural viscosity, and prevent sedimentation.

In addition to the above, the bituminous emulsion composition for coating of the present invention includes asbestos, short fibers such as glass fiber, synthetic fiber, carbon fiber, and natural organic fiber, finely divided silicic acid, stone powder, baryta powder, talc, Graphite, diatomaceous earth, silica sand powder, glass powder,
Fillers such as silica sand, iron sand, iron oxide, zinc oxide, pigments, etc. can also be added and mixed. In addition, water, dispersants, thickeners, and rust preventive agents are used to disperse ferrite powder and other fillers, and to adjust the workability and storage stability of bituminous emulsion compositions for coating. Agents etc. can be added. The amount of ferrite powder and filler added to the clay-taive bitumen emulsion is desirably 200 weight tons of the clay-taib bitumen emulsion.

Next, the four characteristics and effects of the coating bitumen emulsion composition of the present invention will be described.

(1) Because it is an emulsion type, there is no harm caused by volatilization of the solvent,
There is no need to worry about flammability or explosiveness.

(2) Due to the structural viscosity of the clay-tabe bituminous emulsion,
There is no sedimentation or agglomeration of ferrite powder during storage, and a uniform composition can be obtained. +31 Can be applied with a blower, brush, or trowel, and can be diluted with water.

(1) It does not sag even if it is made into a paint film and applied relatively thickly. Also, since it dries from the inside, it does not cause blisters.

Even when heated and dried, it can be dried and dried without flowing or blistering.

(5) Since the dried coating film does not use a surfactant as an emulsifier, it has excellent water resistance, weather resistance, and waterproof properties.

(6) Since it contains a large amount of ferrite powder, it has a remarkable vibration damping effect and a great vibration damping and soundproofing effect.

(7) Since it contains a large amount of ferrite powder, it has excellent radio wave absorption ability and magnetic shielding ability.

The bituminous emulsion composition for coating of the present invention has the excellent effects as described above, and therefore can be effectively applied to undercoating of vehicles, vibration isolation and corrosion prevention of ships, machinery, etc. It can also be effectively applied to walls of buildings, structures, etc. for the purpose of vibration isolation, and can also be used for waterproofing and moisture proofing. Furthermore, it can also be used for the purpose of absorbing and shielding electromagnetic waves.

Next, the present invention will be explained by examples.

Example 1 A suspension of 1.5 parts by weight of bentonite dispersed in 100 parts of water was used as an emulsion to obtain a clayey asphalt emulsion of straight asphalt sound material 551Tj-M'l) 3. This emulsion was used for 100 parts of water. Asbestos 71 (5-layered section, 40 parts by weight of ferrite powder and a small amount of water, dispersant (carboquine vinyl polymer))
11 with the coating Yf emulsion A of the present invention by adding and mixing
A product was obtained.

Example 2 Rubber-containing asphalt was modified by mixing straight asphalt rubber into an emulsified liquid containing 6 parts by weight of bentonand dispersed in 100 parts by weight of water (goto content 3% by weight, penetration rate (25°C). )116) is emulsified,
Evaporation Residue 555% by weight A clay asphalt emulsion is made. This emulsion contains 100 parts of styrene.
Isoprene rubber latex (nonvolatile content 50% by weight)
+0 parts by weight, Riopplenoco latex (non-volatile content 5
0 weight%) 10 weight; 1'L part, asbestos 5 weight parts,
Ferrite powder G O , ij. : 昂-F', ls, and a small amount of water, a dispersant, etc. were added (IX) to obtain the ``$.'' alpha blue emulsion composition of the present invention.

Example 3 An aqueous dispersion of bentonite (566% by weight clayey asphalt emulsion) is prepared by mixing styrene/isosolene rubber-containing strategic asphalt (25°C) '120) with 100 parts by weight of this emulsion and 6 parts by weight of styrene/isoprene rubber latex. Ethylene vinyl acetate copolymer emulsion/(non-volatile content 500% by weight 8 parts by weight, asbestos 5 parts by weight, ferrite powder 60 parts by weight, and a small amount of water and a dispersant etc. are added and mixed to form a bituminous emulsion composition for coating of the present invention. I got something.

Example 4 Acrylic nitrile rubber latex was mixed with a mixture of 70 itt parts of coal tar and 30 parts by weight of coal tar pinch. Water was scattered to create rubberized tar (rubber content: 3% by weight), and this was mixed with bentonite water. Emulsify with a dispersion liquid (bentonite 5% by weight) to create a clay tube cool emulsion. 100 parts by weight of this emulsion, 6 parts by weight of acrylonitrile rubber latex, 10 parts by weight of polyacrylate copolymer emulsion (converted to 50% by weight of non-volatile content), 5 parts by weight of asbestos, 60 parts by weight of ferrite powder, and a small amount of Water and a dispersant were added and mixed to prepare a bituminous emulsion composition for coating of the present invention.

Regarding the bituminous emulsion compositions for coating of the present invention obtained in Examples 1 to 4, the specifications of the Society of Automotive Engineers of Japan (JAS)
The O 7006 underbody coating was tested for storage stability, workability, drying properties, baking test (heating temperature 100℃ for vertical baking), low temperature adhesion, and vibration damping properties.
A flexibility test and a water planting test were conducted according to the standard test method of AST'M D2939 Bituminous Emulsion for Protective Coatings, and good test results were obtained in terms of collapse. The outline of the test method is as follows.

Storage stability: After being left in a JASo 7006 container (4A or higher) for 3 months, there should be no hard lumps, separation, or increase in viscosity that would impede work when the contents are stirred with a stick.

Workability: Must be able to be painted smoothly without any problems.

There should be no dripping or running of the paint film.

Drying: Two-touch dry, cure within 2 hours 2
Baking test within 4 hours (vertical baking): After coating, leave the product vertically at room temperature for 30 minutes, then place it in a thermostat at 100°C and heat it for 1 hour. There should be no blistering or falling off of the coating.

Low-temperature adhesion: No cracking or peeling in slam test at 20°C.

Anti-vibration property: Anti-vibration coefficient 0.06 or more using resonance method.

Flexibility: After drying the coated material on the surface of the iron plate for 48 hours at 25°C and further for 5 hours at 60°C, it was cooled in ice water at 0°C for 1 hour.
It should not be bent 80 times or bent, and there should be no peelings or the like.

Water resistance test: Dry at 25°C for 48 hours, soak in water at 25°C for 24 hours, no re-emulsification, swelling, etc.

1. The coating bituminous emulsion compositions of Examples 1 to 4 are not flammable per se, and flames were directly applied to the shattered dry coating film.
There is no flammability or combustibility, and no flow or blistering is observed. Furthermore, the dried coating films are completely non-tacky and have a surface that is difficult to scratch.

patent applicant Nichirei Chemical Industry Co., Ltd.

Claims (1)

[Claims] A bituminous emulsion composition for coating, which is characterized by mixing and dispersing ferrite powder as a filler in a clay-based bitumen emulsion emulsified with clay.