Blowing agent concentrate

Details Blowing agent concentrate Blowing agent concentrate

1979-02-21

1981-07-14

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 79, 521 81, 521 91, 521122, 521128, 521138, 521182, C08J 900

Patent

active

042787696

ABSTRACT:
A blowing agent concentrate comprising a chemical blowing agent and a thermoplastic composition vehicle therefore, said thermoplastic composition being a saturated polyester and/or copolyester having a crystalline melting point between 100.degree. C. and 220.degree. C. and a reduced viscosity of 0.4 dl/g to 1.6 dl/g; the use of such blowing agent concentrate in the formation of foamed articles of high molecular weight polyalkyleneterephthalate which articles can be filled and/or reinforced and/or flame proofed and can contain other additives. Particularly contemplated is the use of such blowing agent concentrate in the formation of glass fiber reinforced structural foam moldings of polyalkyleneterephthalates especially polytetramethylene terephthalates.

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patent: 3198859 (1965-08-01), Tomlinson
patent: 3511788 (1970-05-01), Keil
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patent: 3725321 (1973-04-01), Wirth et al.
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patent: 3936400 (1976-02-01), Wambach
patent: 3962154 (1976-06-01), Egli
patent: 3965053 (1976-06-01), Kleiner et al.
patent: 4002581 (1977-01-01), Dolce
patent: 4097421 (1978-06-01), Chang

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