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
1985-01-11
1986-11-18
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 59, 528 67, C08G 1810, C08G 1832, C08G 1875
Patent
active
046237097
ABSTRACT:
Polyurethane prepolymers in which polyhydric alcohols are initially reacted with the faster reacting isocyanate group of an asymmetrical diisocyanate with the slowly reacting group remaining intact, after which the reaction products are combined with a symmetrical diisocyanate of which the equally reactive isocyanate groups again react more quickly than the slowly reacting groups of the first polyfunctional isocyanate compound. The products obtained by this process are distinguished by a low residual monomer content.
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H. G. Elias, "Makromolekuele", Huthig & Wepf, Basel, 4th Edition 1981, pp. 487, et seq.
Cockeram Herbert S.
Greenfield Mark A.
Henkel Kommanditgesellschaft auf Aktien
Szoke Ernest G.
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