Single-component polyurethane waterproof coating and preparation method thereof

A polyurethane waterproof, single-component technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor concrete bonding strength, low bonding strength retention rate, and affecting project quality, etc., to achieve improved bonding The effect of weakening the strength

Inactive Publication Date: 2021-11-12
KESHUN WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of use, the paint sometimes has to be soaked in water for a long time, which leads to the deterioration of its bonding strength with concrete, and the low retention rate of bonding strength, which greatly affects the quality of the project

Method used

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  • Single-component polyurethane waterproof coating and preparation method thereof

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preparation example Construction

[0039] The second aspect of the embodiment of the present application provides a method for preparing a one-component polyurethane waterproof coating, comprising steps:

[0040] S01. Under vacuum conditions, mix and stir polyether polyol, telechelic polymer, plasticizer and pigments and fillers evenly to obtain the first slurry;

[0041] S02. Add diisocyanate, latent curing agent and catalyst to the first slurry and react for a preset time to obtain a one-component polyurethane waterproof coating.

[0042] In step S01, the polyether polyol, telechelic polymer, plasticizer and pigment can be stirred and heated to 100°C-120°C under the condition of vacuum degree of -0.09MPa~-0.1MPa, dehydrated for 2h-3h, A first slurry is obtained.

[0043] In some embodiments, the reaction in step S01 can be performed in a reaction vessel.

[0044] In step S02, the temperature of the first slurry can be lowered to 70°C-80°C and diisocyanate can be added, then the temperature can be raised to ...

Embodiment 1

[0049] A kind of one-component polyurethane waterproof coating, raw materials include by weight: polyoxypropylene glycol, 15 parts; hydroxyl-terminated polybutadiene, 15 parts; diphenylmethane diisocyanate, 6.9 parts; chlorinated paraffin, 16 parts heavy calcium powder, 42.5 parts; titanium dioxide, 2 parts; dibutyltin dilaurate, 0.1 part; modified oxazolidine latent curing agent, 2.5 parts.

Embodiment 2

[0051] A kind of single-component polyurethane waterproof coating, raw materials include by weight: polyoxypropylene glycol, 10 parts; hydroxyl-terminated polybutadiene, 20 parts; diphenylmethane diisocyanate, 6.9 parts; chlorinated paraffin, 16 parts heavy calcium powder, 42.5 parts; titanium dioxide, 2 parts; dibutyltin dilaurate, 0.1 part; modified oxazolidine latent curing agent, 2.5 parts.

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Abstract

The invention discloses a single-component polyurethane waterproof coating and a preparation method thereof. The single-component polyurethane waterproof coating comprises the following main raw materials in parts by weight: 5-30 parts of polyether polyol, 10-30 parts of a telechelic polymer, and 5.0-7.7 parts of diisocyanate, wherein the weight ratio X: Y of the polyether polyol to the telechelic polymer is 1: (1-6). The telechelic polymer is used for modifying the single-component polyurethane waterproof coating, the bonding performance of the polyurethane coating is greatly improved, the retention rate of the bonding strength of the polyurethane coating and concrete after long-term water soaking is still high, and the problem that the retention rate of the bonding strength of an existing coating and concrete after long-term water soaking is low is solved.

Description

technical field [0001] The present application relates to the technical field of waterproof coatings, in particular to a one-component polyurethane waterproof coating and a preparation method thereof. Background technique [0002] One-component polyurethane waterproof coatings are widely used as a new type of waterproof coatings in the field of building waterproofing because of their excellent overall waterproof effect, excellent mechanical properties, good low-temperature flexibility, and easy use. However, during use, the coating sometimes has to be soaked in water for a long time, which leads to the deterioration of its bonding strength with concrete, and the low retention rate of bonding strength, which greatly affects the quality of the project. Contents of the invention [0003] In view of this, the present application provides a one-component polyurethane waterproof coating and a preparation method thereof, which can keep the adhesion strength retention rate between...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/61C08G18/69C08G18/48C08G18/44
CPCC09D175/14C09D7/61C08G18/698C08G18/4825C08G18/4854C08G18/44C08K2003/2241C08K2003/265C08K3/22C08K3/26
Inventor 吴海洋何进
Owner KESHUN WATERPROOF TECH CO LTD
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