Patent · US Expired

Branching of polyamides with esters of carbonic acid

US6498217B1 · kind B1 · utility

4Cited by

2References

13Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Miroslav Marek · Praha, CZ
Friedrich-Karl Bruder · Krefeld, DE
Konstadinos Douzinas · Recklinghausen, DE

Key dates

Filing date	Aug 10, 2000
Grant date	Dec 24, 2002
Priority date	—
Expiry date	Aug 10, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G69/48
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A branched polyamide and a process for its preparation are disclosed. Aliphatic or aromatic esters of carbonic acid are used as branching agents in an optionally catalyzed reaction with crystalline polyamide to produce resins having good flow properties, high degree of crystallinity and excellent mechanical properties. Amorphous polyamides that are branched in accordance with the inventive process have improved flow properties.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.