Dispersant for filled, rigid cellular polymers

Details Dispersant for filled, rigid cellular polymers Dispersant for filled, rigid cellular polymers

1995-12-07

1996-10-15

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 98, 521132, 521143, 521146, 521172, 521174, 521181, C08G 1832, C08G 1834

Patent

active

055654975

ABSTRACT:
A process for the manufacture of a closed cell, rigid, polymer foam from polymer foam-forming ingredients containing a filler which comprises:
(a) dispersing the filler in at least a portion of the foam-forming ingredients to form a filled dispersion, a fluorochemical surfactant being incorporated in the foam-forming ingredients either before, during or after the dispersing operation to form a dispersion containing a filler and a fluorochemical surfactant,
(b) mixing the dispersion formed in step (a) with any remaining foam-forming ingredient or ingredients, and
(c) foaming and curing the resultant foam-forming composition.
The fluorochemical surfactant improves the stability, flowability and mixing of the dispersion during the foam production.

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