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US 4,536,582 AGranted
Heat curable solventless liquid prepolymer and novel monomer prepared from N-(2-hydroxyalkyl)phthalimide
AssigneeEagle-Picher Industries, Inc.
InventorRichard A. Markle
Life of this patent
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Abstract
A heat curable, solventless liquid prepolymer is prepared from a rubber monomer; a nitrile monomer such as acrylonitrile or methacrylonitrile; and a novel monomer having the following formula: ##STR1## The prepolymer is formed with sufficient chain transfer agent to establish a weight average molecular weight less than about 25,000. This low viscosity prepolymer is heat curable to form a solid rubber polymer suitable for use as a gasket.
Claims5
A liquid heat curable prepolymer comprising the reaction product of,
- from about 4 to about 10% of an acrylamide having the following formula:
- ##STR6## wherein R.sub.3 represents C.sub.1 to about C.sub.10 alkyl;
- from about 65% to about 75% of a rubber formable monomer selected from the group consisting essentially of conjugated dienes, alkyl esters of acrylic acid and alkyl esters of methacrylic acid;
- and
- from about 20 to about 30% of a nitrile monomer selected from the group consisting essentially of acrylonitrile and methacrylonitrile.
2 more elements
A liquid heat curable prepolymer comprising the reaction product of,
- 4-10% of an acrylamide having the following formula:
- ##STR7## wherein R.sub.3 represents C.sub.1 to C.sub.10 alkyl;
- 65% to 75% of a rubber formable monomer selected from the group consisting essentially of conjugated dienes, alkyl esters of acrylic acid and alkyl esters of methacrylic acid;
- and 20-30% of a nitrile monomer selected from the group consisting essentially of acrylonitrile and methacrylonitrile.
1 more element
Dependencies are inferred from the claim text.