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...
Patent
1991-04-16
1992-05-12
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...
528 63, 528 64, 254393, 474168, C08G 1810
Patent
active
051129337
ABSTRACT:
An ether-based polyurethane article comprises a toluene diisocyanate-terminated polyether polyol prepolymer cured with a blended polyester polyol/diamine curative. The article may be made by mixing a toluene diisocyanate-terminated polyether polyol prepolymer with a blended polyester polyol/diamine curative to form a reaction mixture. A suitably shaped mold is preheated and filled with the reaction mixture with sufficient pressure to displace air in the mold. The reaction mixture is held in the preheated mold to cure the reaction mixture and form the article. The cast article is removed from the mold and post-cured to complete the chemical cross-linking reaction.
REFERENCES:
patent: 3279762 (1966-10-01), Bruns
patent: 4327204 (1982-04-01), Oyaizw et al.
patent: 4507459 (1985-03-01), Schmidt et al.
Gajewski Vincent J.
O'Donnell Hugh J.
Palinkas Richard L.
Rosenberg Ronald O.
Johnson Rachel
Otis Elevator Company
Romanik George J.
Welsh Maurice J.
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