Amine modified polymers reacted with halogen compounds
AssigneePolysar Limited
InventorsEvalds Lasis, Ernest Jack Buckler
Life of this patent
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Abstract
Synthetic rubber compositions of improved green strength are prepared by incorporating in a synthetic rubber polymer, such as NBR or SBR, a small number of tertiary amine groups, and reacting this polymer with a halogen compound of general formula X--CH.sub.2 --R--CH.sub.2 --Y where X and Y represent chlorine, bromine or iodine, and R represents an aromatic group, and where X and Y are capable of forming quaternary ammonium salts with the tertiary amine groups on the polymer.
Claims12
An improved process of preparing a synthetic rubber composition of improved green strength which comprises reacting a rubbery polymer of a C.sub.4 -C.sub.6 conjugated diolefin or a rubbery polymer thereof with a C.sub.8 -C.sub.10 vinyl or vinylidene substituted aromatic hydrocarbon or with a C.sub.3 -C.sub.5 vinyl compound having a nitrile group, the rubbery polymer having from about 0.5 millimoles to about 10 millimoles per 100 grams of polymer of bound tertiary amine groups therein, with a halogen compound, the improvement being that the halogen compound is of general formula
- X -- CH.sub.2 --R--CH.sub.2 --Y
- wherein X and Y each represent chlorine, bromine, or iodine, and R represents a mononuclear aromatic group containing one CH.sub.2 --X group or a methoxy group substituted or a polynuclear aromatic group selected from diphenyl, diphenyl ether, diphenyl thioether, diphenyl alkane in which the alkane residue has from 1-4 carbon atoms, and naphthalene, the aromatic groups of the polynuclear aromatic group being unsubstituted or substituted by one or more groups selected from lower alkyl, lower alkyl halide, aryl or lower alkenyl, the groups X--CH.sub.2 and CH.sub.2 --Y being associated with a different nucleus of the polynuclear aromatic group, and being linked directly to said nucleus
An improved synthetic rubber composition of improved green strength which comprises a rubbery polymer of a C.sub.4 -C.sub.6 conjugated diolefin or a rubbery polymer thereof with a C.sub.8 -C.sub.10 vinyl or vinylidene substituted aromatic hydrocarbon or with a C.sub.3 -C.sub.5 vinyl compound having a nitrile group, the rubbery polymer having therein from 0.5 to 10 millimoles, per 100 grams of polymer, of bound tertiary amine groups, the rubbery polymer having been reacted with a halogen compound, the improvement being that the halogen compound is of general formula
- X--CH.sub.2 --CH.sub.2 --Y
- wherein X and Y each represent chlorine, bromine or iodine, and R represents a mononuclear aromatic group containing one CH.sub.2 --X group or methoxy group substituent, or a polynuclear aromatic group selected from diphenyl, diphenyl ether, diphenyl thioether, diphenyl alkane in which the alkane residue has from 1-4 carbon atoms, and naphthalene, the aromatic groups of the polynuclear aromatic group being unsubstituted or substituted by one or more groups selected from lower alkyl, lower alkyl halide, aryl or lower alkenyl, the groups X-CH.sub.2 and CH.sub.2 -Y being associated with a different nucleus of the polynuclear aromatic group, and being linked directly to said nucleus.
Dependencies are inferred from the claim text.