Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1982-09-30
1984-05-15
Hoke, Veronica P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
528 61, 528 65, 564201, 564203, C08G 1872, C08J 1810
Patent
active
044489056
ABSTRACT:
This invention relates to the reaction products of butyrolactone and an aliphatic amine utilizable as a chain extender and curing agent for castable polyurethanes and to the process employing said products in preparing castable polyurethane elastomers and to the process for preparing the butyrolactone amine adducts. The aliphatic amine reactants employed in preparing the butyrolactoneamine adducts are defined by the formula: ##STR1## wherein X is amino (--NH.sub.2) or hydroxy (--OH); R is hydrogen (--H) or methyl (--CH.sub.3) and n has a value of 1 to 2, which amines are reacted with butyrolactone in a mole ratio of between about 1:1 and about 1:3 to provide a curing agent having superior mechanical properties and having the formula: ##STR2## wherein R is hydrogen or methyl, R' is a hydroxy group or ##STR3## and n has a value of 1 or 2.
REFERENCES:
patent: 3436463 (1969-04-01), Mayhew et al.
patent: 3591814 (1971-07-01), Lloyd et al.
patent: 3663511 (1972-05-01), Lombardi et al.
Anderson Lowell R.
Gromelski, Jr. Stanley J.
Hort Eugene V.
Lin I. Sioun
Williams Earl P.
GAF Corporation
Hoke Veronica P.
Maue Marilyn J.
Mohr J. Gary
Ward Joshua J.
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