Hydrophilic polyurethanes prepared from mixed oxyalkylene glycol

Details Hydrophilic polyurethanes prepared from mixed oxyalkylene glycol Hydrophilic polyurethanes prepared from mixed oxyalkylene glycol

1988-03-09

1988-12-06

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...

528904, C08G 1848

Patent

active

047897201

ABSTRACT:
A hydrophilic, thermoplastic polyurethane polymer of improved dimensional stability and mechanical strength having an average molecular weight of from about 10,000 to about 200,000 produced by reacting (A) an organic diisocyanate with (B) a blend of glycol components comprising (i) ethylene glycol and/or diethylene glycol, (ii) a polyoxyethylene glycol having an average molecular weight of from about 400 to about 20,000 and (iii) a polyoxypropylene glycol having an average molecular weight of from about 200 to about 2500, and (C) water in an amount up to about 0.5% by weight of the reaction mixture. The polymers are particularly useful in the form of a film product such as gloves and condoms. Other uses are as low friction coatings, body implants and active agent release media.

REFERENCES:
patent: 3822238 (1974-07-01), Blair et al.
patent: 3975350 (1976-08-01), Hudgin

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