Cast polyurethane elastomers containing low polarity amine curin

Details Cast polyurethane elastomers containing low polarity amine curin Cast polyurethane elastomers containing low polarity amine curin

1997-09-08

1999-09-21

Sergent, Rabon

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 64, 528 75, 528 85, C08G 1832, C08G 1838, C08G 1862

Patent

active

059555599

ABSTRACT:
Cast polyurethanes are preferably formed from a hydrogenated polydiene diol having from up to 2 terminal hydroxyl groups per molecule and a number average molecular weight between 1000 and 20,000, an isocyanate having two or more isocyanate groups per molecule. This composition is then reacted with an amine curing agent at 80 to 130.degree. C. to form a cast elastomer with excellent hydrolytic stability. The amine curing agent must be a hindered aromatic amine crosslinker with low polarity and a solubility parameter of less than 10.5.

REFERENCES:
patent: 4835210 (1989-05-01), Chin et al.
patent: 5059672 (1991-10-01), Engebretson
patent: 5376745 (1994-12-01), Handlin, Jr. et al.
patent: 5393843 (1995-02-01), Handlin, Jr. et al.
patent: 5405911 (1995-04-01), Handlin, Jr. et al.
patent: 5589543 (1996-12-01), Yokelson et al.
patent: 5594072 (1997-01-01), Handlin, Jr. et al.

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