Ultraviolet-and infrared-ray absorbing polymer composition
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United States of America Patent
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Feb 18, 1997
Grant Date -
N/A
app pub date -
May 2, 1995
filing date -
May 9, 1994
priority date (Note) -
Expired
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Abstract
The ultraviolet- and infrared-ray absorbing polymer composition contains 0.01-1 part by weight of an organic ultraviolet-ray absorbent and 0.001-2 parts by weight of an organic infrared-ray absorbent onto 100 parts by weight of a polycarbonate resin which implies 10-100% by weight of copolyestercarbonate, manufactured by heat-molding process at 210.degree.-245.degree. C. from a mixture of those components. This polymer composition is manufactured easily by an ordinary screw extruder or injection molding machine without strict control of heat-molding temperature, at a high non-defective ratio, said product having a stable effect in absorbing ultraviolet rays and infrared rays, while allowing transmittance of visible radiation rays, thus making it suitable for a wide variety of uses.
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