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Aqueous coating composition

A water-based coating agent and composition technology, applied in the direction of coatings, nuts, bolts, etc., can solve the problems of poor durability and adhesion, and achieve the effects of low environmental load, effective sealing, and high durability

Inactive Publication Date: 2011-09-28
THREEBOND FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, generally speaking, the preservation, workability, and safety are good, but the durability and adhesion of the cured material are inferior to those of the reactive resin composition.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1～15、 comparative manufacture example 1～8

[0058] Preparation of Aqueous Coating Agent Composition

[0059] The aqueous coating composition used in the Example and the comparative example was prepared using the following components.

[0060] [ingredient (A)]

[0061] Sumikaflex 410HQ (ethylene-vinyl acetate copolymer resin emulsion, Tg-18°C, viscosity 3000mPa·s, elongation 700%, solid content 53%, manufactured by Sumika Chemtex Co., Ltd., hereinafter referred to as "410HQ")

[0062] Sumikaflex 408HQE (ethylene-vinyl acetate copolymer resin emulsion, Tg0°C, viscosity 800mPa·s, elongation 650%, solid content 50%, manufactured by Sumika Chemtex Co., Ltd., hereinafter referred to as "408HQE")

[0063] ●Polysol EVA EL-851 (ethylene-vinyl acetate copolymer resin emulsion, Tg0°C, viscosity 10000mPa·s, elongation 1200%, solid content 50%, product of Showa High Molecular Co., Ltd., hereinafter referred to as "EL-851")

[0064] Polysol AP-6750 (styrene-acrylic synthetic resin emulsion, Tg 36°C, viscosity 4000mPa·s, elongation 15...

Embodiment 1～15、 comparative example 1～8

[0095] Method for evaluating properties of aqueous coating composition

[0096] ●Liquid property evaluation method: For each composition produced in the production example and the comparative production example, the initial viscosity and the initial liquid property change were evaluated. The initial viscosity was measured as follows. After each composition was prepared, it was left to stand for 10 minutes, then stirred with a stirring bar, and measured according to the viscosity measurement method specified in JIS K 7117 (BL-type viscometer, 60 rpm / min. 25° C.). Regarding the initial change in liquid properties, each composition left to stand for ten minutes immediately after production and after production was stirred with a stirring bar, and the changes in the respective liquid properties were confirmed respectively. As an evaluation of the initial change in liquid properties, the case where almost no change in properties was observed immediately after production and ten min...

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Abstract

Disclosed is an aqueous coating composition having excellent coating adhesion, workability, heat resistance and chemical resistance. Particularly disclosed is an aqueous coating composition for sealing, which is suitable for members to be screwed in. The aqueous coating composition contains, as main components, (A) an ethylene-vinyl acetate copolymer resin emulsion and (B) two or more PTFE resin powders having different particle diameters. The aqueous coating composition is characterized by containing 35-80 parts by mass of water per 100 parts by mass of the total of the components (A) and (B).

Description

technical field [0001] The present invention relates to a water-based coating agent for coating on metals, plastics, etc., and particularly relates to a water-based coating agent excellent in coating film adhesion, workability at the time of coating film formation, and oil resistance of the coating film at high temperature combination. More specifically, it relates to an aqueous coating composition for sealing that is applied to seal various oils and fats, gas, water, and the like. Background technique [0002] Currently, liquid resin compositions are used in various applications such as paints, inks, adhesives, sealants, and coating agents. These liquid resin compositions can be broadly classified into reactive resin compositions and non-reactive resin compositions. The reactive resin composition uses reactive resins such as epoxy resins, acrylic resins, and silicone resins as binder components, and various hardeners, crosslinking agents, reaction initiators, Catalyst et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D123/08C09D127/18C09D131/04C09D5/02C09D7/12C09K3/10F16B33/06C09D7/65
CPCC08L33/06C09D5/02C08L2205/22F16B33/004C08L2205/02C08L23/0853C09D123/0853C09D7/125C08L25/14C08L27/18C09D7/1283C09D127/18C09D7/65C09D7/69Y10T428/31699Y10T428/31544C08L2205/03C08L23/06C08L23/10C08L33/08C08L2666/02C08L31/04
Inventor 金泽英纪佐藤直毅
Owner THREEBOND FINE CHEM CO LTD
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