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Solvent-free prime coat for prefabricated building sealant as well as preparation method and application of solvent-free prime coat

A sealant and assembly technology, applied in coatings, polyether coatings, etc., can solve problems affecting human health and strong carcinogenic risks

Active Publication Date: 2022-07-12
HANGZHOU ZHIJIANG SILICONE CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The volatilization of a large number of solvents, especially benzene solvents, has a strong risk of carcinogenicity and seriously affects human health. Therefore, the development of solvent-free primers is of great significance to protect the health of operators and the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of Silane Terminated Polymers:

[0041] 850g of polyether polyol (molecular weight 2000) was dehydrated at 120°C for 2h, then cooled to 40°C, added with 150g of 3-isocyanatopropyltrimethoxysilane, reacted at 70°C for 2h, cooled to below 40°C to obtain a silane-terminated polymer .

[0042] Preparation of Solvent Free Primer:

[0043] 800g of silane-terminated polymer, 70g of adhesion promoter KH560, 50g of adhesion promoter KH550, 60g of tetramethoxysilane crosslinking agent, and 20g of tetrabutyl titanate catalyst were stirred and reacted at 40°C for 2h; The primer for assembly-type sealant is obtained.

Embodiment 2

[0065] Preparation of Silane Terminated Polymers:

[0066] 840g of polyether polyol (molecular weight 2000) was dehydrated at 120°C for 2h, then cooled to 40°C, added with 160g of 3-isocyanatopropyltriethoxysilane, reacted at 70°C for 2h, cooled to below 40°C to obtain silane-terminated polymerization thing.

[0067] Preparation of Solvent Free Primer:

[0068] 800g of silane-terminated polymer, 70g of adhesion promoter KH560, 50g of adhesion promoter KH550, 60g of tetramethoxysilane crosslinking agent, and 20g of tetrabutyl titanate catalyst were stirred and reacted at 40°C for 2h; The primer for assembly-type sealant is obtained.

Embodiment 3

[0070] Preparation of Silane Terminated Polymers:

[0071] 750g of polyether polyol (molecular weight 1000) was dehydrated at 110°C for 2h, then cooled to 30°C, added with 250g of 3-isocyanatopropyltrimethoxysilane, reacted at 65°C for 2h, and cooled to below 40°C to obtain a silane-terminated polymer .

[0072] Preparation of Solvent Free Primer:

[0073] 850g of silane-terminated polymer, 100g of adhesion promoter KH560, 40g of methyltrimethoxysilane cross-linking agent, and 10g of tetrabutyl titanate catalyst were stirred and reacted at 30°C for 2h; Primer.

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Abstract

The invention provides a solvent-free prime coat for a prefabricated building sealant as well as a preparation method and application of the solvent-free prime coat, the prime coat comprises the following components in parts by weight: 70-90 parts of a silane-terminated polymer; 3 to 15 parts of an adhesion promoter; 5-15 parts of a cross-linking agent; and 0.1 to 5 parts of a catalyst. The silane-terminated polymer is prepared from isocyanate silane and polyether polyol through a reaction; the adhesion promoter is selected from at least one of epoxy silane and amino silane; the cross-linking agent is selected from at least one of tetramethoxysilane, methyltrimethoxysilane, propyltrimethoxysilane, tetraethoxysilane, methyltriethoxysilane and propyltriethoxysilane, and the cross-linking agent is selected from at least one of tetramethoxysilane, methyltrimethoxysilane, propyltriethoxysilane, tetraethoxysilane, methyltriethoxysilane and propyltriethoxysilane; the catalyst is selected from at least one of titanate, zirconate and aluminate. The solvent-free prime coat for the fabricated building sealant has excellent bonding matching performance on the fabricated sealant under two tests of normal temperature and water immersion on a cement base material surface, is odorless and environment-friendly, and is convenient for online workers to use.

Description

technical field [0001] The invention belongs to the technical field of polymer sealing materials, and in particular relates to a solvent-free primer for prefabricated building sealants, a preparation method and an application. Background technique [0002] With the development of construction technology, residential industrialization has become an inevitable trend in the development of residential technology due to its advantages of shortening construction period, improving safety, energy conservation and environmental protection, cost saving, stabilizing construction quality, and reducing labor costs. The component used in residential industrialization is a prefabricated concrete component that can be processed in the factory. The manufacturing process of the component includes formwork making and installation, concrete preparation and transportation, component pouring, vibrating and curing, demoulding and stacking. During the processing of components, surface treatment age...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D171/00C09D5/00
CPCC09D171/00C09D5/002
Inventor 李云龙方康峻陶小乐刘伟明何永富
Owner HANGZHOU ZHIJIANG SILICONE CHEM