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
1982-02-22
1983-07-05
Kight, III, John
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 58, 528 73, 523105, 523112, C08L 9100, C08G 1875, C08G 1877
Patent
active
043919642
ABSTRACT:
Embedding mass of polyurethane produced on the basis of castor oil, and a method for its production, wherein an aromatic diisocyanate is reacted with a mixture of castor oil and trimethylolpropane into an NCO-group displaying pre-adduct, the pre-adduct being mixed for network polymerization with castor oil or a mixture of castor oil and trimethylolpropane, and after embedding the mixture is hardened in the presence of catalyst, thereby characterized in that a titanium alkylate compound is used as catalyst in amounts from 7 to 700 ppm, calculated as elemental titanium. Preferably, the catalyst is a titanium tetraalkylate; in particular titanium tetrabutylate. Also, a titanium magnesium hexaalkylate may be used as titanium alkylate compound; preferably, titanium magnesium hexabutylate. Preferably the catalyst is present in amounts from 40 to 140 ppm, calculated as elemental titanium. The embedding mass may be used for the embedding of membranes, particularly in artificial organs, especially in the form of hollow filaments, tube foils or flat foils. They may be used for selectively working dialysators, including selectively working hemodialysators, and other arrangements for the detoxification of blood. The embedding is performed according to the casting process, preferably the centrifuge casting process.
REFERENCES:
patent: 3691117 (1972-09-01), Messerly
patent: 3965073 (1976-06-01), Olstowski et al.
patent: 4038239 (1977-07-01), Coyner et al.
patent: 4038304 (1977-07-01), Kazama et al.
patent: 4045527 (1977-08-01), Babayam et al.
patent: 4344873 (1982-08-01), Wick
Schulze Helmut
Wick Gerhard
Akzo NV
Kight III John
Moore M. L.
Striker Michael J.
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