Clarifying agent composition and manufacturing method thereof

Details Clarifying agent composition and manufacturing method thereof Clarifying agent composition and manufacturing method thereof

2011-03-01

2011-03-01

Harlan, Robert D. (Department: 1762)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C252S008910

Reexamination Certificate

active

07897663

ABSTRACT:
A clarifying agent composition comprises a diacetal powder and an organosilane treated fume silica having a pH value of 5.5 to 8, measured in a 4% w/w dispersion in 1:1 mixture of water-methanol. The diacetal has the general structure formula (I), (II), (III), (IV) or (V),wherein R1and R2are independently selected from the group consisting of H, C1-C4alkyl, C1-C4carbalkoxy, F, Cl, and Br; a is 0, 1, 2 or 3; b is 0, 1, 2 or 3 and n is 0 or 1. The organosilane treated fume silica is dispersed in the diacetal powder and being 0.05˜50% by weight the clarifying agent composition.This invention also intents to provide a new manufacturing method for preparing superfine powdery diacetal composition with high dispersion characteristic the use of said compositions for preparing polyolefin plastic article without the visible white spots on the surface of the corresponding article.

REFERENCES:
patent: 4954291 (1990-09-01), Kobayashi et al.
patent: 5198484 (1993-03-01), Mannion
patent: 2007/0060697 (2007-03-01), Li et al.
patent: 565562 (2003-12-01), None

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