Preparation of elastomers using high molecular weight polyols or

Details Preparation of elastomers using high molecular weight polyols or Preparation of elastomers using high molecular weight polyols or

1990-05-29

1992-03-31

Welsh, Maurice J.

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...

521 78, 521163, 521167, 521174, 528 61, 528 64, 528 68, 528 76, 528 77, 264 51, 2643281, 2643286, 2643288, C08G 1828

Patent

active

051009978

ABSTRACT:
The present invention relates to a process for preparing polyurethane/polyurea or polyurea elastomers by spray processing or reaction injection molding a reaction mixture comprising an A-side and a B-side, wherein said A-side comprises a polyisocyanate or an isocyanato-terminated polyurethane prepolymer and wherein said B-side comprises a polyol or polyamine plus a chain extender, in order to form a polyurethane/polyurea or polyurea elastomer, said polyol having an equivalent of between about 1,000 and about 20,000, a preferred molecular weight of between about 5,000 and about 30,000 and an end group unsaturation level of no greater than 0.06 milliequivalents per gram of polyol, said polyol being prepared using a double metal cyanide complex catalyst, said polyamine being fabricated by amine-capping said polyol with an amine-containing compound, said chain extender being selected from the group consisting of diol and aromatic diamine chain extenders with the proviso that said B-side contain at least some amount of said polyamine or of said aromatic diamine chain extender.

REFERENCES:
patent: 3654370 (1972-04-01), Yonkey
patent: 3829505 (1974-08-01), Herold
patent: 3941849 (1976-03-01), Herold
patent: 4218543 (1980-08-01), Weber et al.
patent: 4301110 (1981-11-01), Cuscurida et al.
patent: 4335188 (1982-06-01), Igi et al.
patent: 4358547 (1982-11-01), Cuscurida et al.
patent: 4472560 (1984-09-01), Kuyper et al.
patent: 4477589 (1984-10-01), van der Hulst et al.

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