High temperature resistant polyester composite material and preparation method thereof

A technology of high temperature resistant polyester and composite materials, used in fire-resistant coatings, coatings, etc., can solve the problems of increased cross-linking, brittleness, and debonding of adhesives, and achieve simple synthesis process, superior heat resistance, and easy raw materials. the effect

Active Publication Date: 2019-08-09
成都爱极艺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silicone coating agent synthesized from methyl silicone resin has poor heat resistance, and this type of coating agent may fail when used for a long time under high temperature conditions exceeding 300°C. The thermal decomposition of organic groups such as radicals increases the crosslinking degree of the adhesive sharply.
Using phenyl silicone resin instead of methyl silicone resin has slightly better heat resistance, but it will appear debonding and brittle after long-term use under ultra-high temperature conditions higher than 300 °C

Method used

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  • High temperature resistant polyester composite material and preparation method thereof
  • High temperature resistant polyester composite material and preparation method thereof
  • High temperature resistant polyester composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Synthesis of fluorine-containing phenyl silicone resin

[0061] 5L three-neck flask, equipped with thermometer, reflux condenser and constant pressure dropping funnel, heated by oil bath. Add 800g of toluene and 650g of pentafluorostyrene in sequence, stir and dissolve, and add 2.6g of chloroplatinic acid catalyst under nitrogen protection. Turn on the heating, and after the temperature rises to 80°C, add 510 g of methyldichlorohydrogensilane dropwise, and the addition is completed in 30 minutes, and the dropping time is controlled at about 1 hour. After the dropwise addition, the insulation reaction was continued for 2 hours. After the reaction, the solvent and unreacted methyldichlorosilane were distilled off, and the 132°C fraction (3.75kPa) was collected by distillation under reduced pressure to obtain 950g of pentafluorophenethyldimethylchlorosilane. The purity of the product as measured by gas chromatography was 96.6 %, yield 90.9%.

[0062] In a 250mL Erle...

Embodiment 2

[0076] (1) The steps for synthesizing fluorine-containing phenyl silicone resin are the same as in Example 1.

[0077] (2) Polycondensation reaction

[0078] 2L three-neck flask, equipped with thermometer, water separator and reflux condenser, constant pressure addition funnel, heated by oil bath. Add 170g of 107 gum and 165g of xylene in sequence, stir and raise the temperature to 90°C, and add 1.5g of dibutyltin dilaurate (DBTL). Nitrogen was blown, and a solution of 1 g of dimethyldimethoxysilane dissolved in 20 g of xylene was added dropwise, and the addition was completed in 30 minutes, and the reaction was kept for 3 hours. Then, a solution of 325 g of fluorine-containing phenyl silicone resin dissolved in 200 g of xylene was added, the temperature was raised to 138° C., and the reaction was carried out by reflux and water separation for 24 hours.

[0079] (3) Post-processing

[0080] Add 15 g of hexamethyldisilazane and 6.5 g of isopropanol to the polycondensation pr...

Embodiment 3

[0089] (1) Polycondensation reaction

[0090] 2L three-neck flask, equipped with thermometer, water separator and reflux condenser, constant pressure addition funnel, heated by oil bath. Add 169g of 107 gum and 180g of xylene in turn, stir and raise the temperature to 80°C, and add 1.5g of dibutyltin dilaurate (DBTL). Nitrogen was blown, and a solution of 1 g of dimethyldimethoxysilane dissolved in 20 g of xylene was added dropwise, and the addition was completed in 30 minutes, and the reaction was kept for 3 hours. Then, a solution of 320 g of fluorine-containing phenyl silicone resin dissolved in 200 g of xylene was added, the temperature was raised to 140° C., refluxed and water separated for 48 h.

[0091] (2) Post-processing

[0092] Add 15 g of hexamethyldisilazane and 6.5 g of isopropanol to the polycondensation product, and keep it warm for 5 hours. After the reaction is finished, the reaction is stopped, cooled and discharged to obtain a high temperature resistant ...

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Abstract

The invention discloses a high-temperature-resistant polyester composite material, and a preparation method thereof. According to the preparation method, a fluorine containing phenyl silicone resin and silicone rubber (107 rubber) are taken as raw materials, and condensation polymerization is adopted to obtain an organosilicon coating agent; a polyester base material is coated with a mixture of the organosilicon coating agent, an oxidizing agent, and a diluents, and drying and curing are carried out so as to obtain the high-temperature-resistant polyester composite material. A certain amount of fluorine containing phenyl groups are introduced into the finished product, so that the high-temperature-resistant polyester composite material is excellent in high temperature resistance and bonding performance. The preparation method is simple; equipment requirement is low; and the preparation method is suitable for industrialized amplification production.

Description

technical field [0001] The invention relates to a high-temperature-resistant polyester composite material and a preparation method thereof, belonging to the field of high-temperature-resistant material preparation. Background technique [0002] Polyester materials are widely used. Polyester materials containing adhesive layers include polyester substrates and adhesive layers. Silicone materials are generally used as adhesive layers in high temperature resistant fields. The active ingredient of silicone coating adhesive is the product of polycondensation reaction between silicone resin and silicone rubber (also known as 107 glue). It is diluted to a certain solid content by adding organic solvent, and then adding crosslinking agent and other additives to obtain the product. . Among them, the main function of silicone rubber is to give the coating agent the necessary cohesion. 107 rubber, which is commonly used in the synthesis of silicone coating agents, has a number average...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C09D183/10C08G77/44C08G77/24C08G77/08C08G77/06C08L67/00
CPCC08G77/06C08G77/08C08G77/24C08G77/44C08G77/80C08J7/0427C08J2367/00C08J2483/10C09D5/18C09D183/10
Inventor 李战雄陈蕾
Owner 成都爱极艺新材料科技有限公司
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