Cellular forming agent in resinous systems and resulting product

Details Cellular forming agent in resinous systems and resulting product Cellular forming agent in resinous systems and resulting product

1980-01-14

1982-11-09

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 94, 521 96, 521 97, 521113, 521146, 521154, 521157, 521172, 521178, 521184, 521189, C08J 908

Patent

active

043585485

ABSTRACT:
For forming synthetic cellular materials, gas is generated by the reaction of an isocyanate and a hydroperioxide. The reactants produce a novel polymeric amine oxide foam. When the reactants are introduced to a base resin, cellular foam products (densities throughout the 50 to 2 lbs/ft.sup.3 range), extended resin products of even higher densities, and non-shrink resinous solids (with microcellular distribution of gas) can be obtained. When employed in resins curable with hydroperoxide, a small fraction of the hydroperoxide interacts with a promoter and serves to cure the resin while the larger fraction reacts earlier with the isocyanate to evolve gas before the gellation state of the base resin is reached. The foaming agent can be made commercially available as a premixture of isocyanate and appropriate surfactant for the hydroperoxide reaction. By mixing with low hydroxyl and carboxyl base resin, long pot life is obtainable. The hydroperioxide is kept separate until foaming or cell production in the base resin is desired.

REFERENCES:
patent: 2740743 (1956-04-01), Pace
patent: 3256217 (1966-06-01), Landler et al.
patent: 3404106 (1968-10-01), Bearden et al.
patent: 3404107 (1968-10-01), Bearden et al.
patent: 3573232 (1971-03-01), Kloker et al.
patent: 3823099 (1974-07-01), Doyle
patent: 4216294 (1980-08-01), Halle et al.

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