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Aqueous silicone resin emulsion and applications thereof

A technology of resin emulsion and silicone resin solution, which is applied in antifouling/underwater coatings, coatings, paints containing biocide, etc., and can solve problems such as long curing time, low film hardness, and slow crosslinking reaction

Inactive Publication Date: 2014-04-23
WACKER CHEM CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the slow cross-linking reaction between low-molecular-weight polysiloxane and silicone resin, this kind of emulsion needs a long curing time (more than 20 days) to dry and form a film, and the film hardness is relatively low, which still cannot meet the requirements of practical applications.

Method used

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  • Aqueous silicone resin emulsion and applications thereof
  • Aqueous silicone resin emulsion and applications thereof
  • Aqueous silicone resin emulsion and applications thereof

Examples

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preparation example Construction

[0044] The dissolution of the silicone resin and the preparation of the emulsion can be carried out with a standard mixer, such as a high-speed disperser or a homogenizer. After emulsification is complete, the emulsion can be diluted with water.

[0045] The solid content of the aqueous silicone resin emulsion of the present invention is 1-80% by weight, preferably 30-60% by weight, more preferably 35-55% by weight.

[0046] In the aqueous silicone resin emulsion of the present invention, a small amount may also be included, such as accounting for about 1-5% by weight of the total weight of the emulsion, conventional additives, such as preservatives (isothiazolinone preservatives) and pH regulators (such as methyl Potassium siliconate solution).

[0047] Another aspect of the present invention relates to the use of the aqueous silicone resin emulsion of the present invention in architectural coatings.

[0048] Yet another aspect of the present invention relates to an aqueous...

Embodiment

[0054] In the following examples, unless otherwise specified, the parts are parts by weight.

[0055] Silicone solution 1

[0056] Convert approximately 72 empirical formulas to MeSiO 1.48 (OEt) 0.04 silicone resin (trade name MK powder, provided by Wacker Chemie Company, has a weight average molecular weight of about 10000 g / mol, a polydispersity coefficient of PD of 4.3, and a melting point of 35-55°C) dissolved in 21 parts of 2,2,4-trimethyl-1,3- Pentylene glycol monoisobutyrate (trade name Texanol, provided by Eastman Company, boiling point is 255-261.5 ° C (102.4kPa)) and 7 parts of heavy aromatic hydrocarbon solvent (trade name Solvesso150ND, provided by ExxonMobil Company) in the mixed solution . After stirring evenly, a colorless and transparent solution was obtained, and its viscosity was about 10000 cps at 23°C.

[0057] Silicone solution 2

[0058] Convert approximately 72 empirical formulas to MeSiO 1.48 (OEt) 0.04 silicone resin (trade name MK powder, p...

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Abstract

The invention relates to an aqueous silicone resin emulsion. The aqueous silicone resin emulsion comprises silicone resin and alcohol ester. The silicone resin has a melting point higher than 30 DEG C and the general formula of the structural unit of the silicone resin is Ra(R1O)SiO<(4-(a+b)) / 2>, wherein the R is C1-C14 hydrocarbyl, the R1 is C1-C4 alkyl or hydrogen, the a is 0-3, preferably 0.75-1.5 and more preferably 0.9-1.1, and the b is 0-3, preferably 0.01-1.1 and more preferably 0.01-0.07. The structure of the alcohol ester is defined in the specification and preferably is alcohol ester having a boiling point higher than 250 DEG C. The invention also relates to applications of the aqueous silicone resin emulsion in building coating and relates to aqueous coating containing the aqueous silicone resin emulsion.

Description

technical field [0001] The invention relates to a water-based silicone resin emulsion and its application in the field of architectural coatings. Background technique [0002] Textured architectural coatings are widely used in building exterior walls and external thermal insulation systems for exterior walls. The surface of the textured paint is usually very rough. In the atmospheric environment, it is easy to accumulate dust on the surface, which affects the aesthetic effect. Water-based acrylic varnish is a commonly used texture paint finish, but because it is a thermoplastic polymer, it is easy to become soft and stained with dust under high temperature in summer, so its stain resistance is not very good. Other waterborne coatings with some stain resistance are expected in the architectural coatings field. [0003] In order to achieve this purpose, some documents (such as "preparation of covering polymer and its application in water-based paint", Lin Xiaodan, "Coating I...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08L83/07C08K5/103C08K5/5419C08J3/07C09D183/04C09D183/07C09D5/16
CPCC09D183/04C08L83/04
Inventor 沙圣刚
Owner WACKER CHEM CHINA