Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1976-09-27
1979-07-31
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 97, 521138, 521143, 521144, 521189, C08J 900
Patent
active
041630858
ABSTRACT:
A process for producing a continuous foam sheet of a synthetic resin having a polyolefin base which comprises admixing an organic peroxide, a blowing agent, and a pore regulator with the synthetic resin, finely distributing said peroxide, blowing agent and pore regulator within said resin at a temperature below the decomposition temperature of the peroxide and the blowing agent in the thermoplastic range, shaping the resulting admixture into a sheet or panel and thereafter effecting thermal crosslinking and foaming of the resin. The pore regulator comprises an oligomeric and/or polymeric saturated dicarboxylic acid ester or a mixture of such esters having average molecular weights of from between 500 and 40,000, and flow points and/or melting ranges that are below the decomposition temperature of the peroxide and of the blowing agent.
REFERENCES:
patent: 3306875 (1967-02-01), Hay
patent: 3927159 (1975-12-01), Tomikawa
patent: 3965054 (1976-06-01), Nojiri et al.
patent: 3966651 (1976-06-01), Kleiner et al.
Kuhnel Werner
Spielau Paul
Anderson Harold D.
Dynamit Nobel AG
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