Syndiotactic polystyrene composition with improved crystallizati

Details Syndiotactic polystyrene composition with improved crystallizati Syndiotactic polystyrene composition with improved crystallizati

1997-03-27

1998-04-21

Cain, Edward J.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 92, 524 93, 524 94, 524104, 524106, 524486, C08K 534

Patent

active

057418373

ABSTRACT:
A syndiotactic polystyrene composition is improved which exhibits improved crystallization rate. The improved syndiotactic polystyrene composition contains (a) a syndiotactic polystyrene; and (b) a nucleating agent which is selected from the group consisting of two types of compounds represented by the following formulas, respectively: ##STR1## In Formulas I and II, the radicals R.sub.1 and R.sub.2, which can be the same of different, are C.sub.1 to C.sub.5 alkyl groups, X is a halogen group, preferably a bromide group, and n is an integer from 1 to 5. In the present invention, the nucleating agent is provided at 0.01 to 5 part, by weight, per 100 parts, also by weight, of the syndiotactic polystyrene resin. An example of Formula I compound is 2-hydroxybenimidiazole, and an example of the Formula II compound is bis(phenylbromide) methane.

REFERENCES:
patent: 5034441 (1991-07-01), Nakano et al.
patent: 5156797 (1992-10-01), Yamasaki et al.

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