IP Verse

Polyurethanes Based On Polyester Diols With Improved Crystallization Behavior

Patent No. EP2331598 (titled "Polyurethanes Based On Polyester Diols With Improved Crystallization Behavior") was filed by Basf on Sep 16, 2009. The application was issued on Jul 6, 2016.

Patent Summary

This invention relates to polyurethanes, particularly transparent thermoplastic polyurethanes with reduced crystallization tendencies. The polyurethane comprises: i) at least one isocyanate A; ii) at least one polyester diol B; and iii) optional chain extenders C and further assistants. Polyester diol B is synthesized from 1,3-propanediol and a dicarboxylic acid possessing an even number of carbon atoms. Preferred isocyanates include MDI, hexamethylene diisocyanate, and H12MDI. The resulting polyurethanes exhibit improved transparency and a lower glass transition temperature compared to those using odd-numbered dicarboxylic acids or higher even-numbered diols. Applications include coatings, cables, foils, molded parts, and automotive claddings. Preferred embodiments utilize non-fossil origin components and may include hydrolysis protection agents or stabilizers.

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CompanyOpposition DateRepresentative
THE LUBRIZOLApr 6, 2017D YOUNG

Dossier Documents

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  • Date

    Description

EP2331598

BASF
Application Number
EP09783093A
Filing Date
Sep 16, 2009
Status
Revoked
Jul 12, 2022
Publication Date
Jul 6, 2016
External Links
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