Integral skin microcellular polyester base polyurethane elastome

Details Integral skin microcellular polyester base polyurethane elastome Integral skin microcellular polyester base polyurethane elastome

1980-03-05

1981-09-01

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

36 25R, 36 28, 36 32R, 252182, 252426, 252428, 252430, 252431R, 260 318XA, 260 332R, 521110, 521111, 521112, 521114, C08G 1814

Patent

active

042873070

ABSTRACT:
Synthesis of integral skin microcellular polyurethane elatomers by reacting hydroxyl-terminated aliphatic polyesters with symmetrical diisocyanates, prepolymers of these isocyanates such as derived from p,p'-diphenylmethane diisocyanate and an aliphatic glycol and mixtures thereof, these are polymerized in the presence of an organic blowing agent, and one or more plasticizers such as of the formulae ##STR1## further enhancement of the results is brought about by the presence of catalysts and cell regulating agents, such as dimethylpolysiloxanes; the obtained elastomers are useful, such as for shoe soles and in the manufacture of other products, e.g., vibration dampening devices, floatation devices, gaskets and the like.

REFERENCES:
patent: 3824199 (1974-07-01), Nadeau et al.
patent: 3882072 (1975-05-01), Olstowski
patent: 4065410 (1977-12-01), Schafer et al.

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