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Modified resin water-based dispersion liquid

A resin and water-based system technology, applied in coatings, polyester coatings, etc., can solve problems such as the health impact of production line personnel

Inactive Publication Date: 2015-06-24
WACKER CHEM CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current polysiloxane-modified polyester resin products are still mainly solvent-based, and the solvent content can reach 40wt% or more, and its production and application process have a negative impact on the environment and the health of production line personnel

Method used

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  • Modified resin water-based dispersion liquid
  • Modified resin water-based dispersion liquid
  • Modified resin water-based dispersion liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 5-8

[0070] Examples 5-8 The solid content of the polysiloxane-modified resin oil-in-water emulsion is between 30-45 wt%.

[0071] The methyl / phenyl polysiloxane containing methoxy functional groups in the polysiloxane-modified polyester resin B (abbreviated as SMP B) accounts for 15 wt% of the mass of the polysiloxane-modified polyester resin. The polyester portion of SMP B is a condensation product of neopentyl glycol, terephthalic acid, and phthalic anhydride. The acid value of SMP B is 5.5mgKOH / g, and the hydroxyl value is between 25-500mgKOH / g, provided by Changxing Chemical Industry Company.

[0072] table 3

[0073]

[0074]

[0075] Euxyl K320 is a mixture of phenoxyethanol, methylparaben and ethyl 4-hydroxybenzoate supplied by Schuelke.

[0076] Table 4

[0077] raw material

Example 12

SMP C (60wt% PMA solution)

50

PVA1388 (11wt% aqueous solution)

25

Kathon LXE preservative

0.1

water

24.9

Total

1...

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Abstract

This invention relates to an aqueous dispersion of silicone modified polyester resin comprising a dispersing agent containing structural units of formula (I) wherein R1 and R3 in each occurrence may be the same or different and are divalent C1-C20 hydrocarbon groups, preferably divalent C1-C3 hydrocarbon groups; more preferably C1-C3 alkylene radicals; R2, R4 and R5 are H atom or C1-C20 hydrocarbon groups, preferably R2 and R4 are H atom or C1-C3 alkyl radicals, preferably R5 is C1-C3 alkyl radical; M is OH, ONa, OK or R6OH, wherein R6 is C1-C4 alkylene radical; preferably M is OH; m and n are positive integer; the value of m / (m+n) is between 0.4 and 0.99, preferably between 0.75 and 0.95, and more preferably between 0.85 and 0.92. It can be widely applied in the coating field.

Description

technical field [0001] The invention relates to a modified resin aqueous dispersion. It can be widely used in the coating field. Background technique [0002] Polysiloxane modified resin has a wide range of applications, especially in the coating industry. It can be used in the production of high-temperature resistant coatings, powder coatings, weather-resistant protective coatings, H-class insulating varnishes, sealing coatings for electrical components, impregnated glass cloth, coatings for glass tubes, enameled wire coatings, coatings for metal sheets and coils, etc. [0003] The modification methods of polysiloxane modified resin include physical blending method and chemical copolymerization method. The products obtained by the physical blending method are prone to microphase separation and reduce the mechanical hardness. Chemical modification can be through polycondensation, free radical polymerization and addition reaction, and other organic resins are connected to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D187/00C09D7/12C08J3/02
CPCC09D167/02C09D167/00C08L29/04C09D187/00C08J3/02C08J2387/00C09D7/65
Inventor 林芳陈智敏吴宏興
Owner WACKER CHEM CHINA