Heat stabilizers for expandable styrene polymers

Details Heat stabilizers for expandable styrene polymers Heat stabilizers for expandable styrene polymers

1976-01-30

1977-06-28

Foelak, Morton

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25B, 260 25HB, 260 23H, 260 457R, 260 457P, 260 4575W, 260 458A, 260 4595J, C08J 922

Patent

active

040324818

ABSTRACT:
Expandable styrene polymer particles having reduced flammability are made by incorporating from 0.1 to 15 weight per cent of organic halogen compounds into the polymer during impregnation of the polymer particles with a blowing agent in aqueous suspension. Temperatures greater than 90.degree. C., during the impregnation step, often cause degradation of the halogen compound and subsequent degradation of the polymer at the particle surface. The addition of certain thermal stabilizers, such as a mixture of a modified epoxidized soybean oil and a barium/cadmium organic complex, stabilizes the halogen compounds in the suspension system to temperatures up to 115.degree. C.

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patent: 2924532 (1960-02-01), Derlich
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patent: 3058929 (1962-10-01), Vouderhoff et al.
patent: 3144422 (1964-08-01), Homberg
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patent: 3313867 (1967-04-01), Blackburn et al.
patent: 3418263 (1968-12-01), Hindersinn et al.
patent: 3652494 (1972-03-01), Baker

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