Water-resistant paint composition

A composition and water resistance technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of water resistance and insufficient strength, and achieve the effects of excellent comprehensive performance, excellent water resistance, increased durability and hydrophobicity

Inactive Publication Date: 2015-04-29
北京虹霞正升装饰装修工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problems of insufficient water resistance and insufficient strength of the existing coating film, the present invention provides a coating with excellent water resistance. The coating uses a specific composition and proportion to modify polyurethane resin emulsion, modified diphenyl Methane diisocyanate and alkyd resin are used as the film-forming substances of the coating, which effectively improves the hydrophobicity, hardness and service life of the coating film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation of modified polyurethane resin emulsion: Add polypropylene carbonate to the reactor, heat up to 100°C at a rate of 10°C / min, filter with suction for 1 hour, add isophorone diisocyanate and dibutyltin dilaurate after cooling down , heated to 75°C for 2 hours, then added 3,5-diamino-4-chlorobenzoic acid isobutanol and 2,2-bismethylol propionic acid, reacted for 2 hours, then added The base branched silicone oil was reacted for 5 hours, then an appropriate amount of triethylamine was added, stirred for 30 minutes at a stirring rate of 400 rpm, and then water was added to emulsify and disperse to obtain a modified polyurethane resin emulsion.

[0017] Preparation of modified diphenylmethane diisocyanate: Take 4,4'-diphenylmethane diisocyanate, methyl acetate and antioxidant 1010 into the reaction vessel, raise the temperature to 70°C under the condition of nitrogen atmosphere protection, add Tris-(dimethylaminomethyl)phenol, wherein the amount of tris-(dimethyla...

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Abstract

The invention provides a water-resistant paint composition which comprises the following components in parts by weight: 10 parts of modified polyurethane resin emulsion, 16 parts of modified diphenylmethane diisocyanate, 15 parts of alkyd resin, 6 parts of alumina powder with the granularity of 1000 meshes, 5 parts of nano bentonite, 3 parts of mica powder, 4 parts of dispersing agent, 6 parts of trimethyl hexamethylenediamine, 4 parts of vegetable oil, 4 parts of defoaming agent, 3 parts of zinc sulfate and 35 parts of deionized water. The modified polyurethane resin emulsion, modified diphenylmethane diisocyanate and alkyd resin are used as film forming matters of the paint, thereby effectively enhancing the hydrophobicity, hardness and service life of the coated film.

Description

technical field [0001] The present invention relates to a water-resistant coating composition. Background technique [0002] With the increase of my country's infrastructure construction, a large number of constructions such as railways, highways, and urban subways, the amount of waterproofing projects is huge. In these construction projects, polyurethane waterproof coating is the most commonly used waterproof coating. [0003] On April 5, 2007, the Department of Science and Technology of the Ministry of Railways issued an opinion on passenger dedicated lines, especially high-speed passenger lines, based on the application of foreign high-speed railway bridge waterproof layers, the latest test and research results, and the opinions reflected by the current construction units in the construction of waterproof layers. The waterproof coating used on the special line puts forward higher requirements, including higher standards for the strength and elongation at break of the coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/12C08G18/75C08G18/65C08G18/44C08G18/34
CPCC08G18/348C08G18/4009C08G18/44C08G18/61C08G18/6659C08G18/68C08G18/755C08K2201/011C08L2205/025C09D7/48C09D7/61C09D7/63C09D175/14C08L75/06C08K13/02C08K3/34C08K3/346C08K2003/2227C08K5/17C08K5/1345C08K2003/3045
Inventor 李程伟
Owner 北京虹霞正升装饰装修工程有限责任公司
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