Nucleator for foaming, foamable composition, foam and production

Details Nucleator for foaming, foamable composition, foam and production Nucleator for foaming, foamable composition, foam and production

1999-08-31

2000-09-19

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 81, 521 92, 521134, 521138, 521145, 521142, 521143, C08J 900

Patent

active

061213357

ABSTRACT:
A nucleator for foaming comprising a fluororesin powder comprising particles having a particle size of 0.1-0.5 .mu.m in a proportion of at least 50% by number and containing particles having a particle size of not less than 5 .mu.m in a proportion of not more than 40% by number, a foamable composition comprising this nucleator and an organic polymer, a foam made therefrom, and a production method of the foam. The nucleator of the present invention can produce a foam made from an organic polymer improved in expansion ratio, fineness of the cells, uniformity of foaming and the like by the use of an extremely small amount thereof. It is preferably used for forming an insulating foam layer of a high frequency coaxial cable.

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