Bicomponent normal temperature crosslinked aqueous organosilicon rubber waterproof paint and method for preparing same

A silicone rubber, room temperature cross-linking technology, applied in antifouling/underwater coatings, coatings, paints containing biocide, etc., can solve problems such as poor crack resistance and difficult preparation technology, and achieve excellent hydrophobicity , Good crack resistance, good waterproof performance

Inactive Publication Date: 2005-09-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-emulsion silicone resin can be prepared as a single component, which is convenient for storage, transportation and use, but the crack resistance is not good, and the preparation technology is difficult; water-emulsion silicone rubber not only has the waterproof performance of silicone resin, but also It has high elasticity and excellent crack resistance, but there is also the problem of how to achieve cross-linking and curing of silicone rubber

Method used

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  • Bicomponent normal temperature crosslinked aqueous organosilicon rubber waterproof paint and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In parts by weight, add 5 parts of superfine silica to 10 parts of 30% by weight silica sol, and after dispersion and mixing, add 100 parts of silicone rubber latex with a solid content of 20%, and then add 0.2 Part of dibutyltin dilaurate, stirred for 30 minutes, and mixed evenly to prepare component A. Component B was prepared by mixing 0.2 parts of ethyl orthosilicate (tetraethoxysilane) and 1.2 parts of gamma-aminopropyltriethoxysilane. When in use, calculated by weight percentage, the usage amount of component B is 1.5% of component A, slowly add component B into component A under the condition of stirring, and continue to stir for 30 minutes. Mix evenly to prepare water-based silicone rubber waterproof coating crosslinked at room temperature. After testing, the performance parameters of the two-component room temperature crosslinking and curing waterborne silicone rubber waterproof coating are shown in Table 1.

[0038] The obtained two-component room temperatur...

Embodiment 2

[0042] In parts by weight, add 10 parts of superfine calcium carbonate, 20 parts of fumed silica and 7 parts of iron oxide yellow into 15 parts of water, and after dispersing and mixing evenly, add 100 parts of 50% silicone rubber latex, and then add 1.5 parts of stannous octoate, stirred for 30 minutes, and mixed evenly to obtain component A. Component B was prepared by mixing 2 parts of methyl tributylketoxime silane and 0.2 part of γ-glycidyl etheroxypropyl trimethoxysilane. When in use, calculated by weight percentage, the usage amount of component B is 6% of component A, slowly add component B to component A under the condition of stirring, continue to stir for 40 minutes, and mix well to obtain room temperature cross Linked water-based silicone rubber waterproof coating. After testing, the performance parameters of the two-component room temperature crosslinking and curing waterborne silicone rubber waterproof coating are shown in Table 2.

[0043] The obtained two-com...

Embodiment 3

[0046] In parts by weight, 15 parts of precipitated silica, 5 parts of fumed silica and 10 parts of red iron oxide were added to 25 parts of water, after high-speed dispersion and mixing, 100 parts of 60% silicone rubber latex were added, and then Add 1.0 parts of dibutyltin oxide, stir for 10 minutes, and mix well to obtain Component A. Component B was prepared by mixing 0.2 parts of methyltributanoximinosilane and 3.6 parts of gamma-aminopropyltriethoxysilane. When in use, calculated by weight percentage, the usage amount of component B is 4% of component A, slowly add component B to component A under the condition of stirring, continue to stir for 40 minutes, and mix well to obtain room temperature cross Linked water-based silicone rubber waterproof coating. After testing, the performance parameters of the two-component room temperature crosslinking and curing waterborne silicone rubber waterproof coating are shown in Table 3.

[0047] The obtained two-component room temp...

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Abstract

The invention relates to a dual-component environment-friendly type organic silicon rubber waterproofing paint and its preparation process. The paint contains component A which is made of organosilicon emulsion, strengthening agents, fillers and catalyst, and component B which is made of polyfunctional group organosilicon cross linking agents and tackiness agent. The dual-component environment-friendly type organic silicon rubber waterproofing paint is preparing by compounding of the said components A and B in definite proportions. The tensile strength of the said organic silicon rubber waterproofing paint solidified film is more than 2.0 MPa and the elongation percentage is more than 500%. It also has strong adhesive force for the surface of many base materials such as metal, treatment or untreatment wood, tar mats, ceramic tiles, roofing and asphalt felts.

Description

technical field [0001] The invention relates to the field of environment-friendly waterproof coatings, in particular to a two-component room-temperature cross-linking environment-friendly silicone rubber waterproof coating and a preparation method thereof. Background technique [0002] According to statistics, in the past 10 years, my country's cities and towns have completed an average of more than 100 million square meters of houses every year, and about one-third of the houses have leaked in the year of completion. According to the sample survey of 22 cities in China such as Beijing, Shanghai, Wuhan, and Changsha by the Ministry of Construction, the average leakage rate of newly built houses is as high as 60%. There are so many house leaks, which are related to the commonly used house wall and roof water leakage treatment materials. At present, the new building waterproof materials used in the market are mainly divided into 5 categories: polymer modified bitumen waterpro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/16C09D183/00
Inventor 马文石邓卫星
Owner SOUTH CHINA UNIV OF TECH
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