Process for cross-linking polymers

Details Process for cross-linking polymers Process for cross-linking polymers

1982-01-08

1983-10-11

Wong, Jr., Harry

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525278, 525293, 525296, 525377, 525454, 525474, 525479, 525537, C08F 830

Patent

active

044093675

ABSTRACT:
There is disclosed an improved process for cross-linking polymers by contacting said polymers with a cross-linking agent at an elevated temperature. The improvement comprises using as the cross-linking agent a compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 are independently selected from the group consisting of alkyl groups having 1-22 carbon atoms, alkenyl groups having 2-22 carbon atoms, cyclohexyl groups having 6-20 carbon atoms, phenyl groups having 6-20 carbon atoms, aralkyl groups having 7-20 carbon atoms, alkyloxy groups having 1-22 carbon atoms, alkenyloxy groups having 2-22 carbon atoms, and cyclohexyloxy groups having 6-20 carbon atoms, all of which groups may be substituted or unsubstituted; R.sub.3 is selected from the group consisting of hydrogen, alkyl groups having 1-22 carbon atoms, alkenyl groups having 2-22 carbon atoms, cyclohexyl groups having 6-20 carbon atoms, phenyl groups having 6-20 carbon atoms, aralkyl groups having 7-20 carbon atoms, and ##STR2## wherein R.sub.4 is independently selected from the same group as R.sub.1 and R.sub.2 as defined above, all of which groups may be substituted or unsubstituted; provided that when R.sub.3 is hydrogen, R.sub.1 represents an alkyloxy, alkenyloxy or cyclohexyloxy group as defined above.

REFERENCES:
patent: 4052373 (1977-11-01), Sera et al.
patent: 4160077 (1979-07-01), Brooks et al.

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