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Preparation method of super-weather-resistance polysiloxane modified resin and finish paint

A technology of siloxane modification and acrylic resin, applied in the direction of coating, can solve the problems of high labor cost and environmental pollution, and achieve the effect of high molecular weight and good weather resistance of paint film

Inactive Publication Date: 2017-08-11
NANJING CHANGJIANG PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Now, due to the high labor cost and frequent coating construction and maintenance, it is easy to cause environmental pollution, causing safety and environmental problems

Method used

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  • Preparation method of super-weather-resistance polysiloxane modified resin and finish paint
  • Preparation method of super-weather-resistance polysiloxane modified resin and finish paint
  • Preparation method of super-weather-resistance polysiloxane modified resin and finish paint

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with embodiment, but protection scope of the present invention is not limited to this:

[0025] The formulation components and mass percentages of the super weather-resistant siloxane-modified acrylic resin used in the present invention are shown in Table 1.

[0026] The preparation method of super weather-resistant siloxane modified acrylic resin embodiment 1 to embodiment 3 in the present invention is as follows:

[0027] Add the components of ethyl silicate and vinyl triethoxysilane into the reaction flask, mix well, and raise the temperature to 70-75°C, keeping the temperature constant. Catalyst is prepared according to the formula quantity of water and hydrochloric acid. Then slowly and continuously add the catalyst, react for 2-2.5 hours, and then distill under reduced pressure to remove ethanol and low boilers to obtain a polysiloxane prepolymer.

[0028] Nitrogen gas is blown in, and the temp...

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Abstract

The invention discloses a preparation method of super-weather-resistance polysiloxane modified resin and finish paint. The super-weather-resistance polysiloxane modified resin is synthesized by using ethyl silicate, vinyl alkoxy silane, acrylate monomer, azodiisobutyronitrile, ditert-butyl peroxide and the like as the raw materials according to a specific proportion through a chemical synthesizing and modification method. The finish paint is prepared by using the super-weather-resistance polysiloxane modified resin as the base material and coordinating the base material with pigment, filler, a solvent and a cosolvent through dispersing, grinding and the like. The super-weather-resistance polysiloxane modified resin has a cost advantage as compared with pure organic silicon resin and has higher molecular weight and more reactive groups as compared with common organic silicon modified acrylic resin, and the cured finish paint prepared by the resin is good in paint film weather resistance.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a super-weather-resistant polysiloxane-modified acrylic resin and a preparation method for a topcoat. Background technique [0002] At present, alkyd resins and acrylic resins are mostly used in outdoor weather-resistant coatings, and their weather resistance is maintained at about 2-3 years. Siloxane has Si-O-Si as the main chain. Since the bond energy (450kJ / mol) of the Si-O bond is greater than the bond energy (345kJ / mol) of the C-C bond (345kJ / mol) and the bond energy (351kJ / mol) of the C-O bond of ordinary organic polymers, the siloxane resin has excellent Heat resistance, UV aging resistance. Silicone and acrylic resin have good miscibility. Polysiloxane containing active groups and acrylic resin containing active groups are often used for condensation modification to combine the weather resistance and adhesion properties of the two. [0003] The siloxane-mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/12C08F220/14C08F220/28C08F220/18C08F220/06C08G77/20C09D151/08C09D7/12
CPCC08F283/124C08K2003/2241C08K2003/2251C08K2003/2296C08K2003/3045C09D7/61C09D151/08C08F220/14
Inventor 许驰
Owner NANJING CHANGJIANG PAINT
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