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Two-component polyurethane waterproof coating and preparation method thereof

A two-component polyurethane and waterproof coating technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor weather resistance, chalking, easy yellowing, etc. fast time effect

Inactive Publication Date: 2019-11-29
JIANGSU CANLON BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the technical problem to be solved by the present invention is to provide an improved two-component polyurethane waterproof coating in order to overcome the deficiencies in the prior art, which can overcome the waterproofing in the prior art on the basis of using aromatic isocyanates. After the coating is formed into a film, it is prone to yellowing, powdering, and poor weather resistance. At the same time, the film forming speed is fast, and the mechanical properties after film formation can meet the construction requirements, saving the steps of coating film maintenance

Method used

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  • Two-component polyurethane waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This example provides a two-component polyurethane waterproof coating, its raw materials include A component and B component, and the mass ratio of the feed is 1:1;

[0029] Wherein, in parts by mass, the raw materials of the A component include: 34 parts of polyether diol 2000, 5.6 parts of toluene diisocyanate, 5 parts of hydroxyethyl acrylate, 5 parts of polymethyl methacrylate, 5 parts of methyl 33 parts of methyl acrylate, 6.3 parts of heavy calcium, 7 parts of kaolin, 2 parts of titanium dioxide, 2 parts of fumed silica and 0.1 part of N,N-dimethyl-p-toluidine;

[0030] In terms of parts by mass, the raw materials of the B component include: 34 parts of polyether glycol 2000, 5.6 parts of toluene diisocyanate, 5 parts of hydroxyethyl acrylate, 5 parts of polymethyl methacrylate, 5 parts of methyl methacrylate 33 parts of ester, 6.3 parts of heavy calcium, 7 parts of kaolin, 2 parts of titanium dioxide, 2 parts of fumed silica and 0.1 part of benzoyl peroxide.

[...

Embodiment 2

[0036] This example provides a two-component polyurethane waterproof coating, its raw materials include A component and B component, and the mass ratio of the feed is 1:1;

[0037] Wherein, in parts by mass, the raw materials of the A component include: 34 parts of polyether glycol 2000, 7 parts of diphenylmethane diisocyanate, 5 parts of hydroxyethyl acrylate, and 5 parts of polymethyl methacrylate , 33 parts of methyl methacrylate, 5.9 parts of heavy calcium, 7 parts of kaolin, 2 parts of titanium dioxide, 2 parts of fumed silica and 0.1 part of N,N-dimethyl-p-toluidine;

[0038] In terms of parts by mass, the raw materials of the B component include: 34 parts of polyether glycol 2000, 7 parts of diphenylmethane diisocyanate, 5 parts of hydroxyethyl acrylate, 5 parts of polymethyl methacrylate, 33 parts of methyl acrylate, 5.9 parts of heavy calcium, 7 parts of kaolin, 2 parts of titanium dioxide, 2 parts of fumed silica and 0.1 part of benzoyl peroxide.

[0039] The prepar...

Embodiment 3

[0044] This example provides a two-component polyurethane waterproof coating, its raw materials include A component and B component, and the mass ratio of the feed is 1:1;

[0045] Wherein, in terms of parts by mass, the raw materials of the A component include: 40 parts of polyether glycol 2000, 8 parts of diphenylmethane diisocyanate, 5 parts of hydroxyethyl acrylate, and 5 parts of polymethyl methacrylate , 28 parts of methyl methacrylate, 3.9 parts of heavy calcium, 6 parts of kaolin, 3 parts of titanium dioxide, 2 parts of fumed silica and 0.1 part of N,N-dimethyl-p-toluidine;

[0046] In terms of parts by mass, the raw materials of the B component include: 40 parts of polyether glycol 2000, 8 parts of diphenylmethane diisocyanate, 5 parts of hydroxyethyl acrylate, 5 parts of polymethyl methacrylate, 28 parts of methyl acrylate, 3.9 parts of heavy calcium, 6 parts of kaolin, 3 parts of titanium dioxide, 2 parts of fumed silica and 0.1 part of benzoyl peroxide.

[0047] T...

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Abstract

The invention discloses a two-component polyurethane waterproof coating and a preparation method thereof. The raw materials of the two-component polyurethane waterproof coating comprise a component Aand a component B, the raw materials of the component A and the component B all comprise polyol, polyisocyanate, hydroxyl-terminated acrylate, an acrylate monomer mixture without hydroxyl, a filler and a thixotropic agent; according to the mass percentage content, the component A also comprises 0.1-1% of an accelerant, the mass ratio of hydroxyl-terminated acrylate to polyisocyanate is 0.6-0.95: 1, and the component B further comprises 0.1-1% of an initiator. The preparation method comprises the following steps: reacting the polyol with the polyisocyanate, then adding the hydroxyl-terminated acrylate and the acrylate monomer mixture without hydroxyl, adding the rest raw materials to prepare the component A, reacting the polyol with the polyisocyanate, then adding the hydroxyl-terminated acrylate and the acrylate monomer mixture without hydroxyl, adding the rest raw materials to prepare the component B, and then mixing the components A and B to obtain the product; the waterproof coatinghas the advantages of low cost, fast curing speed, good weather resistance, fast mechanical property rise and the like.

Description

technical field [0001] The invention belongs to the field of polyurethane waterproof coatings, in particular to a two-component polyurethane waterproof coating and a preparation method thereof. Background technique [0002] At present, the polyurethane waterproof coatings on the market are basically dehydrated polyether, plasticizer and powder filler under vacuum conditions, and then react with isocyanate to form polyurethane prepolymers, which are all moisture-curing types, and the surface is dry in about 8 hours. The time is about 24 hours, and the surface and hard drying time are greatly affected by the ambient temperature and humidity. Under the conditions of low temperature and dry air, it is difficult for conventional one-component polyurethane coatings to dry and form a film, which is inconvenient for application and construction. In an environment with rapid weather changes, such as the rainy season in the south, it will be difficult for the newly constructed polyur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/61C08G18/67C08G18/48
CPCC08G18/4825C08G18/672C08K2003/2241C08K2003/265C09D175/14C09D7/61C08K3/26C08K3/346C08K3/22C08K3/36C08K13/02
Inventor 赵祖兵贺小刚李忠人李俊
Owner JIANGSU CANLON BUILDING MATERIALS
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