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Organosilicon-polyvinyl butyral coating (called S-PVB for short) with interpenetrating network structure and preparation method thereof

A polyvinyl butyral, silicone technology, applied in anti-corrosion coatings, coatings, filling slurry, etc., can solve the problems of insufficient flexibility and adhesion, insufficient hardness, water resistance and heat resistance of the coating film.

Inactive Publication Date: 2015-02-11
董思伟 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considering that it is used as a coating alone, its coating film hardness, especially water resistance and heat resistance are not enough.
As we all know, silicone resin has excellent heat resistance, weather resistance, UV aging resistance and water resistance, and has high hardness and transparency, but its flexibility and adhesion are insufficient

Method used

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  • Organosilicon-polyvinyl butyral coating (called S-PVB for short) with interpenetrating network structure and preparation method thereof
  • Organosilicon-polyvinyl butyral coating (called S-PVB for short) with interpenetrating network structure and preparation method thereof
  • Organosilicon-polyvinyl butyral coating (called S-PVB for short) with interpenetrating network structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: polyvinyl butyral (PVB)-ethanol solution preparation

[0034] Take 1 kg of low-viscosity 0 (5-8 seconds) polyvinyl butyral (PVB) powder (white or light yellow), gradually add it to 5 kg of industrial alcohol under stirring, and gradually dissolve into a translucent colloidal liquid. It is 16.7wt%. If you want to prepare a solution with a higher solid content, you can choose PVB powder with a low degree of acetalization or a low degree of polymerization. The solution is sealed and stored in a cool and dry place, and the storage period can reach more than one year.

Embodiment 2

[0035] Embodiment 2: the preparation and construction of organosilicon-polyvinyl butyral (S-PVB) varnish

[0036] 1. Coating preparation:

[0037] First prepare 5% hydrochloric acid: add 1000 g of commercially available industrial hydrochloric acid (about 36%) to dilute with 6 kg of water. Mix 1kg of silicone water repellent-3# with 100-150g of industrial alcohol, then gradually add 80-120g of 5% hydrochloric acid aqueous solution under continuous stirring, carry out pre-reaction, release heat and escape ethanol to form a transparent solution. Take a drop of the solution and put it on the glass to quickly solidify into a film, which is uniform, does not stick to hands, does not flow, and then it can be used after about half an hour. Get the above-mentioned pre-reacted organic silicon-ethanol solution and mix it with the above-mentioned 4kg (concentration 16.7wt%) PVB-ethanol solution under stirring to obtain a uniform and transparent S-PVB varnish. Then it is neutralized to ...

Embodiment 3

[0045] Embodiment 3: the preparation of polyvinyl butyral (PVB) color paste

[0046] Taking the preparation of white paste used in interior and exterior wall paint as an example, measure according to Table II, mix pigments such as titanium dioxide with a particle size of 300 mesh and additives (anti-flocculant or leveling agent, etc.) with industrial ethanol evenly under high-speed stirring, and then add Measure PVB-ethanol solution. Cross 120 mesh sieves after stirring, and obtain the color paste that fineness is 130-140 microns, and its solid content is about 30wt%.This color paste is sealed and preserved in a cool and dry place, and the storage period can reach one year. more than a year.

[0047] Table II. Proportion of polyvinyl butyral (PVB) white pulp

[0048]

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Abstract

The invention relates to a non-toxic and odorless organosilicon-polyvinyl butyral coating (called S-PVB for short) with an interpenetrating network structure. The preparation includes: subjecting polymethyl ethoxy siloxane (a waterproof agent-3#) to hydrolysis and condensation reaction to obtain a polymethyl siloxane (called S for short) cross-linked network, and interpenetrating linear polyvinyl butyral (called PVB for short) molecules into the network to form the interpenetrating network structure. The latter is blended with the thinner industrial alcohol, pigments, additives and the like to obtain the following four types of coatings: wood coating, concrete, stoneware, glazed tile coating and metal antirust coating. As the S-PVB film-forming materialszare non-toxic and odorless, and the used solvent is non-toxic and volatile ethanol and does not involve any formaldehyde, benzene or other toxic solvents, the coating making and use process does not cause harm to human health and environmental pollution. The weather resistance and high hardness of the silicon-containing macromolecule S are combined with the high strength of PVB to complement each other's advantages, thus obtaining the green environmental protection coating with excellent comprehensive properties.

Description

technical field [0001] The invention relates to a novel nontoxic and odorless silicone-polyvinyl butyral coating (S-PVB for short) with an interpenetrating network structure and a preparation method thereof. Background technique [0002] Coatings have become an important building material because they can prevent the damage and erosion of moisture, sunlight, air and other pollutants, and have bright and beautiful decorative effects. However, most of the widely used coatings are organic polymers. Both the film-forming material itself and the solvent or thinner used for dilution will release toxic volatiles and pollute the environment during the film-forming process. Especially the released formaldehyde and benzene can cause various diseases such as cancer and seriously endanger people's health. In order to avoid the hazards of solvents, people have developed solvent-free coatings and water-based coatings. Although the former avoids the hazards of solvents, it is limited by ...

Claims

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Application Information

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IPC IPC(8): C09D129/14C09D183/06C09D7/12C09D5/34C09D5/08
CPCC08K2003/2241C09D129/14C08L2205/03C09D5/084C09D5/103C09D5/34C08L83/04C08L91/00C08K3/04C08K2003/328C08K2003/0812
Inventor 董思伟张彧张榕本
Owner 董思伟