Benzoxazolyl optical brightners in and for thermoplastic composi

Details Benzoxazolyl optical brightners in and for thermoplastic composi Benzoxazolyl optical brightners in and for thermoplastic composi

1994-05-05

1996-04-30

Schilling, Richard L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524140, 25230125, 25230132, 430933, 548220, C08K 545, C07D26362

Patent

active

055126200

ABSTRACT:
Benzoxazolyl brightner compounds and thermoplastic combinations containing such are provided herein. The thermoplastic compositions comprise a thermoplastic resin, a phosphite heat stabilizer present in reduced levels, a brightner present in reduced levels and a pigment. Preferably the thermoplastic resin composition is transparent in nature. The compositions are useful for making molded and blow molded articles which require high levels of transparency, for example, glazing materials such thermoplastic windows. The composition exhibits enhanced appearance, namely a bright natural color in combination with low levels of yellowness by utilizing in combination reduced levels of phosphite and reduced levels of brightner, with moderate levels of pigment.

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patent: 4847149 (1989-07-01), Kiyohara et al.
patent: 5071993 (1991-12-01), Leppard et al.

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