Process for obtaining cellular materials based on unsaturated po

Details Process for obtaining cellular materials based on unsaturated po Process for obtaining cellular materials based on unsaturated po

1981-07-09

1984-07-24

Anderson, Philip E.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 453, 264 464, 264 50, 264257, 264DIG18, 521 82, 521 841, 521 97, 521917, B29D 2700

Patent

active

044618506

ABSTRACT:
Process for obtaining cellular materials, based on unsaturated polyester in optionally containing reinforcing and/or inert fillers, having a density between 0.2 and 1.0 kg/l by moulding under pressure a liquid foam of said resins, characterized by the fact that the liquid foam based on unsaturated polyester resins containing conventional additives, optionally containing an inert and/or reinforcing charge of mineral or organic fibers having a length which is less than 5 mm, preferably less than 3 mm and more preferably less than 1.5 mm, obtained by mechanical introduction of a gas and/or by means of a chemical and/or physical foaming agent, is firstly introduced into an open half-mould optionally containing a further fiber reinforcement, by casting an amount higher than the free volume of the mould, and subsequently said foam is cross-linked.

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