Ultraviolet light stabilized polycarbonate article
Abstract
Abstract AN ULTRAVIOLET LIGHT RESISTANT POLYCARBONATE ARTICLE CONSISTING OF A POLYCARBONATE SUBSTRATE HAVING BONDED TO AT LEAST ONE SURFACE THEREOF AN ACRYLATE COPOLYMER FILM OF 1 TO 10 MILS THICKNESS WHEREIN THE ACRYLATE COPOLYMER FILM AHS UNIFORMLY DISPERSED THROUGHOUT 0.25-5.0 WEIGHT PERCENT OF AN ULTRAVIOLET LIGHT ABSORBENT BASED ON THE WEIGHT OF THE ACRYLATE COPOLYMER FILM. THE ULTRAVIOLET LIGHT ABSORBENT MAY BE ANY OF THE KNOWN ULTRAVIOLET LIGHT ABSORBENTS. THE ARTICLE IS PARTICULARLY RESISTANT TO ULTRAVIOLET LIGHT AND PROTECTS THE POLYCARBONATE FROM ATTACK FROM ULTRAVIOLET LIGHT. IN ADDITION, A PROCESS IS ALSO DISCLOSED FOR PREPARING AN ULTRAVIOLET LIGHT RESISTANT POLYCARBONATE ARTICLE, WHICH PROCESS CONSISTS OF BRINGING AN ACRYLATE COPOLYMER FILM INTO CONTACT WITH A POLYCARBONATE SHEET AT ELEVATED TEMPERATURES AND AT A PRESSURE OF AT LEAST 20 P.S.I. AND THEN COOLING THE ARTICLE TO ROOM TEMPERATURE.
Inventors
- 👤 Raymond C Urban
Bibliographic Details
Claims Analysis
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| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
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