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One-component polyurethane waterproof coating with high weather resistance and exposed type and preparation method thereof

A polyurethane waterproof and exposed technology, which is applied in the field of coatings, can solve the problems of poor weather resistance and unsuitability for exposed use, and achieve the effects of good construction performance, large elongation, and increased heat resistance and weather resistance

Active Publication Date: 2021-10-08
荆门科顺新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at overcoming at least one defect of the above-mentioned prior art, and provides a kind of highly weather-resistant exposed type one-component polyurethane waterproof coating, and in the formed prepolymer, a silicon-oxygen bond (Si-O- Si) chain segment structure greatly increases the weather resistance of polyurethane waterproof coatings. It has excellent weather resistance without adding antioxidants, ultraviolet absorbers and other additives, and solves the problem of poor weather resistance of traditional one-component polyurethane waterproof sealants. Problems not suitable for exposed use

Method used

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  • One-component polyurethane waterproof coating with high weather resistance and exposed type and preparation method thereof
  • One-component polyurethane waterproof coating with high weather resistance and exposed type and preparation method thereof
  • One-component polyurethane waterproof coating with high weather resistance and exposed type and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A high weather resistance exposed type one-component polyurethane waterproof coating consists of the following components calculated in parts by weight:

[0038]

[0039] The preparation method of the high weather resistance exposed type one-component polyurethane waterproof coating is as follows:

[0040] (1) Add silicone double-ended diols, silicone single-ended diols, plasticizers, and gradually add pigments and fillers to the strong disperser to disperse evenly;

[0041] (2) Transfer the dispersed slurry to the reactor, stir and heat up to 100-110°C, and dehydrate for 2-3 hours at a relative vacuum of -0.08-0.1MPa;

[0042] (3) Lower the temperature to 70-80°C, add solvent, then gradually add diisocyanate and hexamethylene diisocyanate trimer, control the dropping rate to 1-2 parts by weight / s, stir, and then add 1 / 4 ~1 / 2 of the recipe amount of catalyst, heat up to 75~85°C, and react for 3~4 hours;

[0043] (4) Add chain extender and react at 75-85°C for 0.5-1...

Embodiment 2

[0047] A high weather resistance exposed type one-component polyurethane waterproof coating consists of the following components calculated in parts by weight:

[0048]

[0049] The preparation process of the high weather resistance exposed type one-component polyurethane waterproof coating described in this example is basically the same as that of Example 1, and will not be repeated here.

Embodiment 3

[0051] A high weather resistance exposed type one-component polyurethane waterproof coating consists of the following components calculated in parts by weight:

[0052]

[0053]

[0054] The preparation process of the high weather resistance exposed type one-component polyurethane waterproof coating described in this example is basically the same as that of Example 1, and will not be repeated here.

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Abstract

The invention discloses a high weather resistance exposed type one-component polyurethane waterproof coating and a preparation method thereof. The one-component polyurethane waterproof coating comprises the following components calculated in parts by weight: 15-25 parts of silicone double-terminal diol ; 9-19 parts of silicone single-ended diol; 4-7 parts of plasticizer; 25-36 parts of pigment and filler; 9-20 parts of diisocyanate; 0-9 parts of hexamethylene diisocyanate trimer; 1 ~2 chain extenders; 0.1~1 catalysts; 8~15 solvents. The high weather resistance exposed type one-component polyurethane waterproof coating of the present invention has excellent weather resistance without adding additives such as antioxidants and ultraviolet absorbers, and solves the problem of poor weather resistance of traditional one-component polyurethane waterproof sealants. Issues with exposed use.

Description

technical field [0001] The invention relates to the technical field of coatings, more specifically, to a high weather resistance exposed type one-component polyurethane waterproof coating and a preparation method thereof. Background technique [0002] Polyurethane waterproof coating is one of the important components of the application of polyurethane synthetic materials. Due to the elasticity and good extensibility of the polyurethane coating film, good cohesiveness, small volume shrinkage, and no seams in the waterproof layer of the coating film, it has strong adaptability to the deformation of the cracks in the base layer, and is convenient for construction and maintenance. The surface of the complex base layer is easy to construct and can be used for waterproofing and plugging in different parts of the building, so it has become one of the main materials for building waterproofing. There is no measurement error in the construction of single-component polyurethane waterp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/61C09D7/65C09D7/63C08G18/61C08G18/12C08G18/32
CPCC08G18/12C08G18/61C08K2003/2241C08L2201/08C09D175/04C09D7/61C09D7/63C09D7/65C08G18/3206C08L91/06C08K3/34C08K3/22C08K5/11
Inventor 何宏林龚兴宇陈立义
Owner 荆门科顺新材料有限公司