Graft copolymers of para-alkylstyrene/isoolefin copolymers as blend compatibilizers
First Claim
1. A method of compatibilizing a polymer blend of (a) a first polymer including repeating units of the formula ##STR68## wherein R1 and R2 are selected from the group consisting of hydrogen, aryl, alkyl, and mixtures thereof, and (b) a second polymer which is incompatible with said first polymer, said method comprising adding to said polymer blend a compatibilizer comprising a graft copolymer comprising ##STR69## wherein R and R'"'"' are independently selected from the group consisting of hydrogen, alkyl, and the primary and secondary alkyl halides, a ranges from about 14 to 70,000, b ranges from 0 to about 70,000, c ranges from 0 to about 70,000, d ranges from 1 to 70,000, X comprises a halogen, and Nu comprises a nucleophilic residue provided by a thermoplastic polymeric nucleophile having a molecular weight of at least 1,000 and being sufficiently nucleophilic such that said nucleophile is capable of donating electrons to benzyl halides.
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Abstract
A method of compatibilizing a blend of at least a hydrocarbon polymer with at least one other polymer which is incompatible with the hydrocarbon polymer, said method comprising adding to the polymer blend a compatibilizer which is an isoolefin/para-alkylstyrene copolymer represented by the formula ##STR1## in which R and R'"'"' can be hydrogen, alkyl, and the primary and secondary alkyl halides, "a" ranges from about 14 to about 70,000, "b" ranges from 0 to about 70,000, "c" ranges from 0 to about 70,000, "d" ranges from about 1 to about 70,000, X is a halogen, and Nu is a nucleophilic residue provided by a polymeric nucleophile.
36 Citations
16 Claims
- 1. A method of compatibilizing a polymer blend of (a) a first polymer including repeating units of the formula ##STR68## wherein R1 and R2 are selected from the group consisting of hydrogen, aryl, alkyl, and mixtures thereof, and (b) a second polymer which is incompatible with said first polymer, said method comprising adding to said polymer blend a compatibilizer comprising a graft copolymer comprising ##STR69## wherein R and R'"'"' are independently selected from the group consisting of hydrogen, alkyl, and the primary and secondary alkyl halides, a ranges from about 14 to 70,000, b ranges from 0 to about 70,000, c ranges from 0 to about 70,000, d ranges from 1 to 70,000, X comprises a halogen, and Nu comprises a nucleophilic residue provided by a thermoplastic polymeric nucleophile having a molecular weight of at least 1,000 and being sufficiently nucleophilic such that said nucleophile is capable of donating electrons to benzyl halides.
- 9. A method of compatibilizing a polymer blend of (a) a first polymer including repeating units of the formula ##STR70## wherein R16 and R17 are hydrogen or alkyl, and (b) a second polymer which is incompatible with said first polymer, said method comprising adding to said polymer blend a compatibilizer comprising a graft copolymer comprising ##STR71## wherein R and R'"'"' are independently selected from the group consisting of hydrogen, alkyl, and the primary and secondary alkyl halides, a ranges from about 14 to 70,000, b ranges from 0 to about 70,000, c ranges from 0 to about 70,000, d ranges from 1 to 70,000, X comprises a halogen, and Nu comprises a nucleophilic residue provided by a polymeric nucleophile having a molecular weight of at least 1,000 and being sufficiently nucleophilic such that said nucleophile is capable of donating electrons to benzyl halides.
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15. The method of claim 15 wherein R4 and R5 are hydrogen.
Specification