Tetrafunctional initiator

Details Tetrafunctional initiator Tetrafunctional initiator

2000-04-20

2000-12-26

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 456, 521 79, 521 81, 521147, 521148, 5262305, 526346, C08J 900

Patent

active

06166099&

ABSTRACT:
The melt of polyvinyl aromatic polymers comprising from 10 to 45 weight % of star branched polymer prepared using a combination of thermal and tetra functional peroxide initiation has an improved melt strength permitting better foam formation for extrusion foam blown with conventional blowing agents and inert gases including CO.sub.2.

REFERENCES:
patent: 2848427 (1958-08-01), Rubens
patent: 2848428 (1958-08-01), Rubens
patent: 3960784 (1976-06-01), Rubens
patent: 4424287 (1984-01-01), Johnson et al.
patent: 5250577 (1993-10-01), Welsh
patent: 5266602 (1993-11-01), Walter et al.
patent: 5576094 (1996-11-01), Callens et al.
patent: 5760149 (1998-06-01), Sanchez et al.
patent: 5830924 (1998-11-01), Suh et al.
L.C. Rubens, Some Effects of Crosslinking Upon the Foaming Behavior of Heat Plastified Polystyrene, Journal of Cellular Plastics, Apr., 1965, pp. 311-320.

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