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US 5,516,849 AGranted
Continuous process for producing adducted EPM or EPDM oil solution
AssigneeDSM Copolymer, Inc.
InventorsTony L. Caines, Michael L. Junker
Life of this patent
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Abstract
The present invention provides a continuous process for producing an adducted derivatized EPM or EPDM oil solution in which a grafted ethylene polymer is adducted with an antioxidant diamine for formation of an adduct during holding.
Claims18
A continuous process for the production of adducted EPM oil solution, comprising the continuous sequence of:
- interpolymerizing in solution monomers of ethylene and an olefinic hydrocarbon having from 3 to 16 carbon atoms to produce a polymer product;
- concentrating the polymer product in the solution;
- grafting the polymer with a grafting monomer selected from the group consisting of an organic unsaturated carboxylic acid or anhydride to produce a grafted polymer;
- preparing an oil solution of the grafted polymer;
- mixing the oil solution with an antioxidant polyamine composition in the presence of an aliphatic or phenolic alcohol ethoxylate solvent;
- and,
- holding the resulting mixture for a sufficient time and at a sufficient temperature to permit the formation of an imide adduct between the grafted polymer and the polyamine.
4 more elements
A continuous process for the production of adducted EPM oil solution, comprising the continuous sequence of:
- interpolymerizing in solution monomers of ethylene and propylene to produce a polymer product;
- concentrating the polymer product in the solution;
- grafting the polymer with a grafting monomer which has the structure ##STR6## in which R is an alkylene group having 0-4 carbon atoms;
- Y is hydrogen or a branched or straight chain alkyl group, a halogen group such as chlorine, bromine or iodine, or a heterocyclic or other organic group having 1-12 carbon atoms;
- and X is a hydroxy, alkoxy or aryloxy group, but at least one X group is hydroxy to form a grafted polymer;
- preparing a paraffinic oil solution of the grafted polymer;
- mixing the oil solution, in the presence of an aliphatic or phenolic alcohol ethoxylate solvent, with an antioxidant polyamine composition including at least a first amine group separated from a second amine group by at least three or more carbon atoms;
- and,
- holding the resulting mixture for a sufficient time and at a temperature between 120EF and 350EF to permit the formation of an imide adduct between the grafted polymer and the polyamine.
6 more elements
A continuous process for the production of adducted polymer oil solution, comprising the steps of:
- interpolymerizing in solution monomers of ethylene and propylene to produce a polymer product;
- concentrating the polymer product in the solution;
- grafting the polymer with maleic anhydride using a peroxide catalyst selected from the group consisting of dicumyl peroxide and 2,5-dimethyl-2,5-di(tertbutyl peroxy) hexane to form a grafted polymer;
- preparing a paraffinic oil solution of the grafted polymer;
- mixing the oil solution, in the presence of a solvent consisting of the reaction product of C.sub.7 -C.sub.20 aliphatic alcohols with ethylene oxide, with an antioxidant polyamine composition including at least a first amine group separated from a second amine group by at least three or more carbon atoms;
- and,
- holding the resulting mixture for a sufficient time and at a temperature between 120EF and 350EF to permit the formation of an imide adduct between the grafted polymer and the polyamine.
4 more elements
Dependencies are inferred from the claim text.