Asphalt polyurethane waterproof coating and preparation method thereof

A polyurethane waterproof and waterproof coating technology, used in polyurea/polyurethane coatings, asphalt coatings, coatings, etc., can solve the problems of easy adverse reactions, high surface energy, poor adhesion, etc., to improve compatibility and Adhesion, low surface energy, strong bonding effect

Active Publication Date: 2022-05-17
KESHUN WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the self-adhesive asphalt membrane is a non-polar material with low surface energy, and the polyurethane waterproof coating is a polar material with high surface energy, and when the two are combined due to the presence of solvents, adverse reactions between the two are prone to occur. , poor adhesion

Method used

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  • Asphalt polyurethane waterproof coating and preparation method thereof
  • Asphalt polyurethane waterproof coating and preparation method thereof
  • Asphalt polyurethane waterproof coating and preparation method thereof

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preparation example Construction

[0050] The second aspect of the embodiment of the present application provides a method for preparing an asphalt polyurethane waterproof coating, comprising steps:

[0051] S01. Stir and mix polyether polyol, polyolefin polyol, asphalt, plasticizer, defoamer and filler to obtain a first mixture;

[0052] S02. Under the condition that the relative vacuum degree is -0.08MPa~-0.1MPa, the first mixture is stirred and heated to 100°C-110°C, and dehydrated for 2h-3h to obtain the second mixture;

[0053] S03. Add diisocyanate, latent curing agent and catalyst to the second mixture to react for a preset time to obtain bituminous polyurethane waterproof coating.

[0054] In step S01, the polyether polyol, hydroxyl-terminated polybutadiene acrylonitrile, asphalt, filler and plasticizer can be dispersed for 4 minutes to 6 minutes at a rotation speed of 800 rpm to 1200 rpm; then the rotation speed is adjusted to 1500 rpm to 2000 rpm to further Disperse for 30 minutes to 50 minutes to ob...

Embodiment 1

[0065] A kind of asphalt polyurethane waterproof coating, raw material comprises by weight: polyether glycol 2000, 10 parts; polyether trihydric alcohol 330N, 5 parts; Acrylonitrile, 2 parts; BASF TDI-80, 2 parts; Chlorinated paraffin, 3 parts; No. 70 petroleum pitch, 5 parts; Dibutyltin dilaurate, 0.2 parts; Foaming agent, 0.1 part; 1250 mesh talcum powder, 20 parts; 800 mesh heavy calcium, 25 parts.

Embodiment 2

[0067] A kind of asphalt polyurethane waterproof coating, raw material comprises by weight: polyether glycol 2000, 10 parts; polyether trihydric alcohol 330N, 7 parts; Acrylonitrile, 4 parts; BASF TDI-80, 3 parts; chlorinated paraffin, 3 parts; No. 70 petroleum pitch, 10 parts; dibutyltin dilaurate, 0.3 parts; imine latent curing agent, 1 part; Foaming agent, 0.1 part; 1250 mesh talcum powder, 20 parts; 800 mesh heavy calcium, 25 parts.

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Abstract

The application discloses an asphalt polyurethane waterproof coating and a preparation method thereof. The main raw materials of the asphalt polyurethane waterproof coating include, in parts by weight: polyether polyol, 15-25 parts; polyolefin polyol, 2-10 parts; Diisocyanate, 2 to 6 parts; asphalt, 5 to 20 parts. This application utilizes hydroxyl-terminated polybutadiene acrylonitrile to partially replace traditional polyether polyol, reacts it with isocyanate, and introduces non-polar butadiene and highly polar acrylonitrile into the synthetic polyurethane prepolymer. This kind of chain segment greatly enhances the compatibility between polyurethane prepolymer and asphalt, and the prepared asphalt polyurethane coating has better compatibility and adhesion with asphalt coil.

Description

technical field [0001] The present application relates to the technical field of waterproof coatings, in particular to an asphalt polyurethane waterproof coating and a preparation method thereof. Background technique [0002] In recent years, the composite waterproof process represented by coatings and membranes has become a hot spot in the field of building waterproofing. The most common construction process is the composite use of polyurethane waterproof coatings and self-adhesive bitumen waterproof membranes. Since the self-adhesive asphalt membrane is a non-polar material with low surface energy, and the polyurethane waterproof coating is a polar material with high surface energy, and when the two are combined due to the presence of solvents, adverse reactions between the two are prone to occur. , poor adhesion. Contents of the invention [0003] In view of this, the present application provides an asphalt polyurethane waterproof coating with better compatibility and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D195/00C08G18/69C08G18/48C08G18/12
CPCC09D175/14C08G18/698C08G18/4812C08G18/12C08G2150/00C08L95/00
Inventor 戴小聪姜仡鹏陈立义
Owner KESHUN WATERPROOF TECH CO LTD
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