IP Verse

Polyester Resin And Preparation Method Therefor

Patent No. EP3406646 (titled "Polyester Resin And Preparation Method Therefor") was filed by Kingfa SCI & Tech on Sep 4, 2017. The application was issued on Dec 25, 2024.

Patent Summary

A method for preparing a polyester resin with improved moisture permeability. The method involves synthesizing a polyester resin with a specific hydrogen ratio of 1.2-2.4 ppm, achieved by controlling the sequence length and randomness of the repeat unit in the molecular chain. The polyester resin is prepared by condensation polymerization of a diol and a diacid mixture, comprising a conjugated dicarboxylic acid and a non-conjugated dicarboxylic acid. The resulting polyester resin exhibits a water vapor transmission rate of 100-1500 g/m²/d when formed into a thin film.

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Patent Oppositions (2)

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CompanyOpposition DateRepresentative
NOVAMONTAug 10, 2022MAIWALD
BASFAug 9, 2022MEISSNER BOLTE PARTNERSCHAFT MBB

Dossier Documents

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EP3406646

KINGFA SCI & TECH
Application Number
EP17848103A
Filing Date
Sep 4, 2017
Status
Patent Maintained As Amended
Nov 22, 2024
Publication Date
Dec 25, 2024
External Links
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