Patent · US Expired

Method for making multilayered resin bodies having UV-protection and the resultant products

US4576870A · kind A · utility

22Cited by

16References

16Claims

0Family size

Assignee

Rohm Co., Ltd. · JP

Inventors

Ralf Liebler · Darmstadt, DE
Siegmund Besecke · Hameln, DE
Manfred Munzer · Bensheim, DE

Key dates

Filing date	Mar 28, 1984
Grant date	Mar 18, 1986
Priority date	—
Expiry date	Mar 28, 2004

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31909
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A method for making multilayered synthetic resin bodies by the coextrusion of thermoplastic molding compounds wherein at least one of the layers in the extruded body is to be protected against UV light, which comprises extruding at least one layer from a thermoplastic molding compound that is formed entirely or predominantly of a copolymer formed between monomers comprising in their molecules groups or structures which, because of their characteristic absorption of ultraviolet light, provide protection against ultraviolet light, together with other, known, monomers.

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