Transparent copolyamides, process for their preparation and use
Transparent copolyamides were prepared by copolymerization of alicyclic dicarboxylic acids and aliphatic linear diamines and by antisolvent precipitation technology. This solved the problems of insufficient transparency and glass transition temperature, and achieved optical materials with high transparency and heat resistance.
CN122213402APending Publication Date: 2026-06-16ZHEJIANG QINGHE ADVANCED MATERIAL TECH CO LTD +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHEJIANG QINGHE ADVANCED MATERIAL TECH CO LTD
- Filing Date
- 2026-03-23
- Publication Date
- 2026-06-16
AI Technical Summary
⚠Technical Problem
Existing transparent polyamides are not high enough in terms of transparency and glass transition temperature, making them difficult to use in the production of optical lenses.
⚗Method used
A transparent copolyamide was prepared by polymerizing an alicyclic diacid with an aliphatic linear diamine and using an antisolvent to induce the precipitation of the amide salt from an aqueous solution, ensuring an equimolar ratio of diacid and diamine for the polymerization reaction.
🎯Benefits of technology
The transparency, glass transition temperature, and refractive index of the transparent copolyamide have been improved, making it suitable for applications such as high-end optical lenses.
✦ Generated by Eureka AI based on patent content.
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Figure CN122213402A_ABST
Abstract
The application belongs to the field of high polymer materials, and particularly relates to a kind of transparent copolyamides and its preparation method and application.The transparent copolyamides are prepared from the amide salt solid of component A and the amide salt solid of component B, component A contains comonomer, the comonomer of component A is composed of aliphatic straight-chain diamine and 1,4-cyclohexane dicarboxylic acid, component B contains comonomer, the comonomer of component B is composed of alicyclic diamine and aliphatic straight-chain dibasic acid;The comonomer of component A is added with water to form the amide salt solution of component A, and then anti-solvent is added to form the amide salt solid of component A;The comonomer of component B is added with water to form the amide salt solution of component B, and then anti-solvent is added to form the amide salt solid of component B.The transparent copolyamides with better transparency, better heat resistance, higher refractive index and higher intrinsic viscosity can be obtained.
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