Patent · US Expired

Light-scattering translucent polymethacrylate molded articles with good resistance to elevated temperature and weathering

US5621028A · kind A · utility

12Cited by

5References

19Claims

0Family size

Assignee

Roehm GmbH Chemische Fabrik · DE

Inventors

Hans Lichtenstein · Reinheim, DE
Silvia Ebert · Darmstadt, DE

Key dates

Filing date	Mar 3, 1994
Grant date	Apr 15, 1997
Priority date	—
Expiry date	Mar 3, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2205/18
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to light-scattering polymethacrylate resins with high heat- and weather resistance, which resins may optionally be colored with dyestuffs or pigments. The desirable properties are achieved by addition of a combination of: PA0 particles which are light-scattering, and are crosslinked and contain phenyl groups; PA0 UV protectants; and PA0 radical scavengers. The inventive polymethacrylate molded articles are advantageously employed in illumination technology.

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