Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High weather resistance polyester for solar backplane multilayer film bonding and its synthesis method

A technology for solar back sheets and multi-layer films, applied in the direction of adhesives, etc., can solve the problems of increasing total reaction time, increasing energy consumption and production cost, and achieving the effects of low cost, improved weather resistance, and simple synthesis process

Active Publication Date: 2021-09-03
浙江乘鹰新材料股份有限公司
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of heat stabilizers can also inhibit the polycondensation reaction while inhibiting the thermal degradation reaction, thereby increasing the total reaction time and increasing energy consumption and production costs.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High weather resistance polyester for solar backplane multilayer film bonding and its synthesis method
  • High weather resistance polyester for solar backplane multilayer film bonding and its synthesis method
  • High weather resistance polyester for solar backplane multilayer film bonding and its synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides a kind of highly weather-resistant polyester used for solar backboard multilayer film bonding, and its preparation method comprises the following steps:

[0032] (1) Put 20kg of terephthalic acid, 40kg of isophthalic acid, 36kg of sebacic acid, 60kg of neopentyl glycol, 15kg of 2-methyl-2,4-pentanediol, and 14kg of 1,5-pentanediol into the reaction Stir and heat in the kettle at a temperature of 120°C to 140°C. After the material is melted, add 36g (the unit is g) of dihydroxybutyl tin chloride, and gradually raise the temperature to 220°C to 240°C for reaction. When it is measured that the lactonization rate in the kettle is more than 94%, start vacuuming, and gradually increase the vacuum until the hydroxyl value of the material in the kettle is 56±4mgKOH / g.

[0033] (2) Reduce the temperature in the kettle to below 160°C, put in 3kg of trimethylolpropane, gradually raise the temperature to 240°C, keep it warm for 2 hours, start vacuuming, an...

Embodiment 2

[0036] This embodiment provides a kind of highly weather-resistant polyester used for solar backboard multilayer film bonding, and its preparation method comprises the following steps:

[0037] (1) 17kg phthalic anhydride, 44kg isophthalic acid, 36kg sebacic acid, 58kg neopentyl glycol, 15kg 2,2,4-trimethyl-1,3-pentanediol, 12kg 1, Put 5-pentanediol into the reaction kettle and stir and heat at a temperature of 120°C to 140°C. After the material is melted, add 36g (the unit is g) of dihydroxybutyl tin chloride, and gradually raise the temperature to 220°C to 240°C for reaction. When it is measured that the lactonization rate in the kettle is more than 94%, start vacuuming, and gradually increase the vacuum until the hydroxyl value of the material in the kettle is 56±4mgKOH / g.

[0038] (2) Reduce the temperature in the kettle to below 160°C, put 5.1kg of pentaerythritol into it, gradually raise the temperature to 240°C and keep it warm for 2 hours, start vacuuming, and gradual...

Embodiment 3-7

[0041] Examples 3-7 respectively provide a kind of high weather resistance polyester used for solar backplane multilayer film bonding, and the specific components and contents are shown in Table 1; the preparation method is the same as that of Example 1.

[0042] Table 1

[0043]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a kind of high weather resistance polyester used for solar backboard multilayer film bonding and its synthesis method. The raw material of the polyester includes the following components in weight percentage: binary compound containing ring structure Carboxylic acid or ester monomer 15-49.49%; dicarboxylic acid without ring structure 15-25%; neopentyl glycol 25-40%; diol containing two or more asymmetric methyl groups 5% ~15%; 5%~15% of dihydric alcohol containing less than one methyl group; 0.01%~0.03% of catalyst; 0.5%~5% of crosslinking agent. The present invention greatly improves the weather resistance of polyester by introducing diols containing more than two asymmetric methyl groups such as 2,2,4-trimethyl-1,3-pentanediol, and through the steric hindrance effect provided by side groups sex. Through step-by-step synthesis, the content of crosslinking agent is increased, and the density of polyester network structure is increased, which greatly improves the weather resistance of polyester.

Description

technical field [0001] The invention relates to the technical field of polyester backsheet adhesive, in particular to a highly weather-resistant polyester used for bonding multilayer films of solar backsheets and a preparation method thereof. Background technique [0002] The solar backsheet is located on the back of the solar panel, which protects and supports the battery sheet, and has reliable insulation, water resistance, and aging resistance. The currently widely used solar backsheet has a three-layer structure (PVDF / PET / PVDF), the outer protective layer PVDF has good environmental erosion resistance, the middle layer is PET polyester film with good insulation properties, PVDF and PET pass through EVA (copolymer of ethylene and vinyl acetate) bonding. During the use of EVA glue, it will slowly change under the action of ultraviolet rays, high temperature, moisture and oxygen. The main phenomena are discoloration, oxidative fading, delamination and acetic acid productio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/20C09J167/02
CPCC08G63/20C09J167/02
Inventor 董海普张钰馨王玉春吴奎
Owner 浙江乘鹰新材料股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com