JPS5938274A - Non-stick putty sealing composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION When waterproofing the outer wall of a structure, the present invention uses acrylic resin, which is conventionally used for treating board butts, joints, joints, cracks in the base, etc. A non-adhesive putty-like sealing composition that can be used in place of polyurethane-based, polyurethane-based, thiocol-based sealants, etc. and can significantly shorten drying time. Elastic sealing materials such as urethane-based, thiocol thread, acrylic-based, and butyl rubber-based are often used as waterproofing materials.

When using these sealants, cut the large rack part, insert the back-up material, and then fill it with the sealant. Cracks with gaps of about 0.3 mm or less are treated by applying a sealant. Conventional sealants require a certain amount of drying time for each abrasive material, e.g.
It took 24 hours, and the clearing work could not begin. This is because if you apply the finishing material in the next step before the sealant dries, especially if you use a roller or brush, the applied sealant may separate from the surface it is being applied to or be pulled. This is because the sealing effect will be lost. Therefore, this waiting time for drying reduces work efficiency, and especially for factory-produced products that are made by butting together multiple panels, boards, etc., this drying time is one of the children of improving productivity. It had become.

The present invention provides a putty-like sealing composition that does not lose its sealing effect even if the next work step is started after a long period of time after construction.

The composition of the present invention uses a copolymer emulsion containing alkyl acrylate and acrylic acid (or methacrylic acid) as a binder, and is made into a high viscosity putty by adding a filler, and has a viscosity of 200.000 cps. The above is a tack-free putty-like sealing composition characterized by having a film elongation of 500% or more and a surface tack-free property.

The copolymer emulsion used in the present invention contains alkyl acrylate and acrylic acid (or methacrylic acid) as monomers, and also contains ethylene, vinyl acetate,
It may also contain monomers such as vinyl chloride, acrylonitrile, styrene, and butadiene.

Fillers include extender pigments used in paints, such as calcium carbonate, clay, kaolin, fly ash, white carbon, and titanium oxide. The composition of the present invention may also contain a nonionic surfactant, a viscosity stabilizer, an antifoaming agent, an antiseptic and fungicidal agent, a pH regulator, an antifreeze agent, and the like.

/=ON i1 As the surface active agent, polyoxyethylene ether type, polyoxyethylene ester type, oxyethylene/oxypropylene block copolymer, etc. are used, and as the viscosity stabilizer, condensed phosphate, polyacrylate, etc. are used. , lignin sulfonate, etc., and antifoaming agents include silicone antifoaming agents.

Generally, 50 to 20 parts of filler per ioo parts by weight of copolymer.
0 parts by weight, and appropriate amounts of other additives are used. The viscosity of the composition can be adjusted by selecting the amount of water absorbed by the filler and adjusting the formulation.
00,000 cps or more (normal humidity), film elongation is 50
It is adjusted so that it is 0% or more.

The composition prepared in this way takes the form of a hard putty, and if this is applied as a sealant for waterproofing a structure, a topcoat material can be applied with a roller or the like immediately or within a short period of time after application. At that time, the applied sealant will not separate or be stretched, and the sealing properties will not be impaired. Therefore, the overall working time can be significantly shortened.

Next, the present invention will be explained in detail with reference to Examples.

In the examples, "1 part" is based on weight.

Example 1 Acrylic emulsion to
Part O pigment (titanium oxide)
5-part polyoxyethylene nonylphenyl ether
2 parts sodium polyacrylate
2-part antifoaming agent
0.1 part preservative and fungicide
0.1 part pH adjuster
2 part antifreeze
Viscosity of 1 part formulation 500,000
cps Example 2 Acrylic emulsion 100 parts extender 80 parts pigment 5 parts polyoxyethylene nonylphenyl ether
2 parts sodium polyacrylate
2-part antifoaming agent
Part 01 Preservative and fungicide
0.1 part pH adjuster
2 part antifreeze
1 part water
Viscosity of 200 parts 200
,0OOcpsNext, the compositions of Examples 1 and 2 were applied to a slate board coated with acrylic primer in advance with a putty spatula to a thickness of 2 mm, and after a certain period of time, the main material of the elastic spray material was applied with a roller. The non-adhesive property was evaluated. The results are shown in the table below.

(The following is a blank space) As described above, the composition of Example 1 allows the next operation to be started immediately after construction, and the composition of Example 2 also allows the next operation to be started after 60 minutes.

Patent applicant: Isamu Paint Co., Ltd. Agent: Patent attorney Takuo Akaoka 433

Claims (1)

[Claims] It consists of a composition made into a high viscosity putty by adding a filler and using a copolymer emulsion containing alkyl acrylate and acrylic acid (or methacrylic acid) as a binder.
A non-stick putty-like sealing composition having a viscosity of 200,000 cps or more, a film elongation of 500% or more, and a non-stick surface.