Production of molded articles having excellent optical character

Details Production of molded articles having excellent optical character Production of molded articles having excellent optical character

1982-12-15

1985-04-30

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264 11, 264106, 26432814, 26432817, 524611, B29F 108, B29D 1100

Patent

active

045143579

ABSTRACT:
A molded article having excellent optical characteristics and obtained by injection molding a resin composition of a bis(hydroxyphenyl)alkane polycarbonate resin having an average molecular weight of 12000 to 18000 and containing 0.005 to 0.5 wt %, based on the resin, of a phosphorous ester represented by the general formula, ##STR1## wherein R.sup.1 and R.sup.2 independently represent an alkyl or aryl group, and R.sup.3 represents hydrogen, an alkyl or aryl group, at a resin temperature of 330.degree. to 400.degree. C. and at a mold temperature of 50.degree. to 110.degree. C., and a method for producing such articles.

REFERENCES:
patent: 3305520 (1967-02-01), Fritz et al.
patent: 3763063 (1973-10-01), Factor
patent: 4008031 (1977-02-01), Weber
patent: 4076686 (1978-02-01), Calkins
patent: 4197384 (1980-04-01), Bialous et al.
patent: 4254065 (1981-03-01), Ratkowski
patent: 4276233 (1981-06-01), Markezich et al.
patent: 4284591 (1981-08-01), Neefe
patent: 4364878 (1982-12-01), Laliberte

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