Urethane compositions prepared via preformed adducts

Details Urethane compositions prepared via preformed adducts Urethane compositions prepared via preformed adducts

1985-04-18

1986-04-01

Cockeram, Herbert S.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 44, 528 67, C08G 1832, C08G 1810

Patent

active

045799296

ABSTRACT:
Urethane compositions are prepared which contain preformed adducts. The preformed adducts are prepared by reacting a polyisocyanate with various polyols or amine analogs thereof whereby a product insoluble in the urethane prepolymer is produced. An intermediate polyol is added to produce a prepolymer. The cured urethane compositions have high low-strain moduli.

REFERENCES:
patent: 3850880 (1974-11-01), Hakanson et al.
patent: 3894994 (1975-07-01), Day et al.

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