Patent · US Expired

1,1,3,4,6-Pentamethyl-3-(3,5-dimethyl-4-hydroxyphenyl)-indan-5-ol polycarbonates

US4129612A · kind A · utility

10Cited by

1References

19Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Volker Serini · Krefeld, DE
Gerhard Friedhofen · Krefeld, DE
Dieter Frietag · Krefeld, DE
Jürgen Heuser · Krefeld, DE

Key dates

Filing date	Mar 28, 1977
Grant date	Dec 12, 1978
Priority date	—
Expiry date	Mar 28, 1997

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31681
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention is concerned with aromatic thermoplastic polycarbonates which contain at least about 0.5 mole % of structural units derived from 1,1,3,4,6-pentamethyl-3-(3,5 dimethyl-4-hydroxyphenyl)-indan-5-ol. The polymers disclosed herein may be homopolymers of these units or copolymers with other aromatic dihydroxy compounds and/or tri or higher functional branching agents. These homopolymers or copolymers may be used per se or they may be blended with other thermoplastic resins, particularly other aromatic polycarbonates. In addition, these polymers may be used to prepare coatings which may be cross-linked by heat treatment or radiation or they may be used as the base for graft polymerization.

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