Embedding mass based upon fast-reacting polyurethane casting res

Details Embedding mass based upon fast-reacting polyurethane casting res Embedding mass based upon fast-reacting polyurethane casting res

1982-11-22

1984-02-21

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 54, 528 58, 528 60, 528 66, 528 75, 528 745, C08G 1818

Patent

active

044331282

ABSTRACT:
Embedding masses are disclosed on the basis of fast-reacting polyurethane casting resins, which are obtained through reaction of an aromatic polyisocyanate with a mixture of castor oil and trimethylolpropane into an NCO-group-displaying pre-adduct and polymerization of this pre-adduct with a polypropyleneglycol or a mixture of polypropyleneglycol and trimethylolpropane in the presence of small amounts of a catalyst mixture composed of dialkyl tin dicarboxylate and tertiary amine. The polyurethane casting resins can harden in seconds-fast reaction, and are therefore preferably suitable for a continuous embedding of membranes in automatic machines, particularly of membranes for artificial organs.

REFERENCES:
patent: 4272377 (1981-06-01), Gerlach et al.

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