Modified polysilazane prepolymer, modified polysilazane coating and usage method of modified polysilazane coating

A polysilazane, prepolymer technology, applied in anti-corrosion coatings, fire-retardant coatings, coatings, etc., can solve problems such as difficult degradation, biological and environmental hazards, and achieve smoothness, good hand feel, and good adhesion. , smooth surface effect

Active Publication Date: 2018-07-27
GUANGZHOU WINHIGH CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively stable chemical properties of long fluorocarbon compounds, it is difficult to be degraded, thus causing harm to humans, organisms and the environment

Method used

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  • Modified polysilazane prepolymer, modified polysilazane coating and usage method of modified polysilazane coating
  • Modified polysilazane prepolymer, modified polysilazane coating and usage method of modified polysilazane coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Add 0.05 parts of perfluoropolyether alcohol, 40 parts of polysilazane and 0.0001 part of palladium acetylacetonate into the reactor and mix them uniformly, then react at 95°C for 2 hours to obtain modified polysilazane modified by perfluoropolyether alkane prepolymer; wherein, the polysilazane is represented by the following formula:

[0070] -(SiR 1 R 2 -NR 3 ) n -, where R 1 for hydrogen, R 2 is an alkyl group, R 3 for vinyl.

[0071] (2) 5 parts of the modified polysilazane prepolymer prepared in step (1) and 20 parts of butyl acetate were mixed and stirred at room temperature until the mixture was uniform to obtain the modified polysilazane coating.

[0072] (3) The modified polysilazane coating prepared in step (2) was flow-coated on the tinplate panel, and moisture-cured at 80° C. for 180 minutes; then cooled to room temperature to obtain the modified polysilazane coating.

Embodiment 2

[0074] (1) Add 10 parts of perfluoropolyether alcohol, 70 parts of polysilazane and 0.0003 parts of tetrabutylammonium fluoride into the reactor and mix evenly, then react at 70°C for 5 hours to obtain perfluoropolyether-modified A modified polysilazane prepolymer; wherein, the polysilazane is represented by the following formula:

[0075] -(SiR 1 R 2 -NR 3 ) n -, where R 1 is an alkyl group, R 2 for vinyl, R 3 for vinyl.

[0076] (2) 50 parts of the modified polysilazane prepolymer prepared in the step (1) and 60 parts of butyl acetate were mixed and stirred at room temperature until the mixture was uniform to obtain the modified polysilazane coating.

[0077] (3) The modified polysilazane coating prepared in step (2) was flow-coated on the tinplate panel, and moisture-cured at 180° C. for 100 minutes; then cooled to room temperature to obtain the modified polysilazane coating.

Embodiment 3

[0079] (1) 20 parts of perfluoropolyether alcohols, 100 parts of polysilazane and 0.0003 parts by mass of 2,4-lutidine and 0.0002 parts by mass of dicumyl peroxide are added to the reactor and mixed uniformly, then React at 20°C for 10 hours to obtain a modified polysilazane prepolymer modified by perfluoropolyether; wherein, the polysilazane is represented by the following formula:

[0080] -(SiR 1 R 2 -NR 3 ) n -, where R 1 for hydrogen, R 2 is an alkyl group, R 3 is a trialkoxysilylalkyl group.

[0081] (2) 80 parts of the modified polysilazane prepolymer prepared in step (1) and 95 parts of butyl acetate were mixed and stirred at room temperature until uniformly mixed to obtain a modified polysilazane coating.

[0082] (3) The modified polysilazane coating prepared in step (2) was flow-coated on the tinplate panel, and cured by moisture at 250° C. for 20 minutes; then cooled to room temperature to obtain the modified polysilazane coating.

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Abstract

The invention discloses a modified polysilazane prepolymer, a modified polysilazane coating and a usage method of the modified polysilazane coating. The modified polysilazane prepolymer is prepared bymixing raw materials of the modified polysilazane prepolymer and carrying out a reaction at a temperature of 50-95 DEG C for 2-10 hours, wherein the raw materials comprise the following components inparts by weight: 0.05-20 parts of perfluoropolyether, 40-100 parts of polysilazane and 0.0001-0.0005 part of a catalyst. The modified polysilazane prepolymer provided by the invention is obtained through modification of perfluoropolyether; the coating prepared from the modified polysilazane prepolymer is environmentally friendly and has good adhesion with the surfaces of most of base materials; acoating layer formed by coating and curing the modified polysilazane prepolymer has high hardness, has excellent hydrophobic and oleophobic properties, solvent resistance, high-temperature resistanceand salt-spray resistance, and has good flexibility, smoother surface and the like.

Description

technical field [0001] The invention relates to the technical field of paint production, in particular to a modified polysilazane prepolymer, a modified polysilazane paint and a use method thereof. Background technique [0002] As a new type of coating, polysilazane or modified polysilazane can adhere closely to smooth substrates such as metals, minerals, glass, ceramics and organic materials. High temperature, solvent resistance and acid and alkali corrosion performance. With the development of the industry, people's demand for coating performance is getting higher and higher. A single polysilazane can no longer meet the requirements in some aspects. It is necessary to improve and enhance the original polysilazane by grafting other substances. At present, the substances commonly used for graft modification are: polyurethane resin, acrylic resin, fluorine-containing acrylic resin, epoxy resin or silicone oil, etc. [0003] Hydrophobic and oleophobic properties are one of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C09D187/00C09D5/08
CPCC08G81/00C09D5/08C09D5/18C09D187/005
Inventor 王元兵罗元章武放舟
Owner GUANGZHOU WINHIGH CHEM TECH CO LTD
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