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Epoxy-modified polysiloxane paint and preparation method thereof

An epoxy modification and polysiloxane technology, applied in anti-corrosion coatings, coatings, etc., can solve the problems of high VOC content, poor alkali resistance, low hardness, etc., achieve low VOC content, good corrosion resistance, prolonged The effect of service life

Active Publication Date: 2016-12-07
WUXI HUADONG ZINDN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In order to overcome the high VOC content of polysiloxane coatings in the prior art, poor alkali resistance, low hardness and other deficiencies, the purpose of the present invention is to provide an epoxy-modified polysiloxane coating, which can be used at room temperature It can be cured to form a film, easy to use, no need to heat, reduce energy consumption, and has good corrosion resistance and UV aging resistance, greatly extending the service life

Method used

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  • Epoxy-modified polysiloxane paint and preparation method thereof
  • Epoxy-modified polysiloxane paint and preparation method thereof

Examples

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Embodiment 1

[0025] The preparation of embodiment 1 epoxy-modified polysiloxane resin

[0026] Mix 100kg of Dow Corning DC-3074 and 20kg of tetraethyl orthosilicate to make a polysiloxane intermediate; add 15kg of hydrogenated epoxy resin (ZD6040E) and 15kg of TPGDA to the above polysiloxane intermediate. Under protection, react at 80°C for 2 hours to synthesize epoxy-modified polysiloxane resin.

Embodiment 2

[0027] The preparation of embodiment 2 epoxy-modified polysiloxane coatings

[0028] First weigh 65kg of the prepared epoxy-modified polysiloxane resin (prepared according to the method of Example 1) and add it to the grinding tank, and then add 0.3kg of wetting and dispersing agent BYK110, 0.5kg of BYK-A530 defoamer, 2.2kg of rheology additive 201P (purchased from Deqian), 30kg of titanium dioxide and 2kg of fumed silica, stirred at 800rpm / min for 30min, then ground by a sand mill until the particle size is less than or equal to 20μm, and then filtered for 15min Component A: Dilute the amine curing agent ELNT-7010 to 60w / v% with xylene, stir at a low speed of 200rpm / min for 30min to obtain component B.

[0029] Components A and B are used in combination according to the weight ratio of 4:1, and the substrate to be coated can be coated by spraying, brushing, and rolling to form a uniform coating on the substrate .

Embodiment 3

[0031] First weigh 68kg of the prepared epoxy-modified polysiloxane resin (prepared according to the method of Example 1) and add it to the grinding tank, and add 0.3kg of wetting and dispersing agent BYK110 and 0.5kg of BYK successively under low-speed stirring -A530 defoamer, 2.2kg of rheology additive 201P (purchased from Deqian), 28kg of titanium dioxide and 1kg of fumed silica, stirred at 800rpm / min for 30min and then ground by a sand mill until the particle size is less than or equal to 20μm, Stand still for 15 minutes and filter to obtain component A; dilute acryloyloxypropyltrimethoxysilane with xylene to 60w / v%, stir at a low speed of 200rpm / min for 30min to obtain component B.

[0032] The weight ratio of component A and component B is 4:1, and the substrate to be coated can be coated by spraying, brushing and rolling to form a uniform coating on the substrate.

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Abstract

The invention discloses epoxy-modified polysiloxane paint and a preparation method thereof. The epoxy-modified polysiloxane paint comprises a component A and a component B and a weight ratio of the component A to the component B is 4-5: 1. The component A comprises 63.5-70wt% of epoxy-modified polysiloxane resin, 25-30wt% of titanium dioxide, 0.25-1wt% of a dispersant, 0.25-1wt% of an antifoaming agent, 1-2.5wt% of a theological assistant and 1-2wt% of fumed silica. The component B comprises xylene and a curing agent diluted by the xylene. The preparation method comprises preparing the epoxy-modified polysiloxane resin, uniformly mixing the epoxy-modified polysiloxane resin and other ingredients of the component B according to the above ratio and carrying out direct dilution to obtain the component B. The epoxy-modified polysiloxane paint can be cured to form a film at the normal temperature, has good corrosion resistance and UV aging resistance and greatly prolongs a service life. The preparation method is simple and fast and has low energy consumption.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to an epoxy-modified polysiloxane coating and a preparation method thereof. Background technique [0002] Polysiloxane is a polymer with Si-O-Si bond as the main chain, and is also commonly called silicone resin. The bond energy of the silicon-oxygen bond reaches 460kJ / mol, which is higher than the ultraviolet energy in sunlight (315-415kJ / mol). Therefore, polysiloxane has outstanding resistance to ultraviolet decomposition. The silicon-oxygen bond also has good thermal stability and chemical resistance. The hydrophilic / hydrophobic characteristics, softness, thermal stability, chemical reactivity and other properties of polysiloxane can also be adjusted by changing the side group, thus greatly expanding its application. In the field of coatings, polysiloxane is mainly used in the following three aspects: first, high temperature resistant silicone coatings, which have relatively mature prac...

Claims

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Application Information

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IPC IPC(8): C09D183/10C09D5/08C09D7/12C08G77/42
CPCC08G77/42C08K3/22C08K3/36C08K5/5425C08K5/544C08K2003/2241C09D5/08C09D7/61C09D7/63C09D183/10
Inventor 杨志华沈星星王京甫
Owner WUXI HUADONG ZINDN TECH
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