Claims
- 1. A graft copolymer formed by:
- (A) graft polymerizing onto a first polymer of polypropylene wherein said polypropylene is present in an amount from about 1 weight percent to about 50 weight percent; at least one comonomer wherein said comonomer is present in an amount from about 75 mole percent to about 90 mole percent and is selected from the group consisting of acrylamide, methacrylamide, acrylonitrile, acrylic acid, methacrylic acid, alkali salts of acrylic acid, alkali salts of methacrylic acid, 2-methacryloyloxyethyldiethylamine, 2-acrylamido-2-methylpropane sulfonic acid, alkali salts of 2-acrylamido-2-methylpropane sulfonic acid, 2-methyacryloyloxyethane sulfonic acid, alkali salts of 2-methacryloyloxyethane sulfonic acid, N-vinyl-2-pyrrolidone and combinations of two or more thereof; and
- (B) graft copolymerizing therewith an ampholytic ion pair monomer wherein said ampholytic ion pair monomer is present in an amount from about 2 mole percent to about 25 mole percent and having an ammonium cation and a sulfonate anion wherein
- (i) the ammonium cation is 2-methacryloyloxyethyldiethylammonium; and
- (ii) the sulfonate anion is selected from the group consisting of 2-acrylamido-2-methylpropane sulfonate, 2-methacryloyloxyethane sulfonate, vinyl sulfonate, styrene sulfonate and any combination of two or more thereof; and
- (C) partially saponifying neutralization of said graft copolymer formed in step (B).
- 2. The graft copolymer of claim 1 wherein
- (A) the comonomer is selected from the group consisting of acrylonitrile, acrylamide and alkali salt of acrylic acid
- (B) the ampholytic ion pair is 2-methyacryloyloxyethyldiethylammonium and a sulfonate anion selected from the group consisting of 2-acrylamido-2-methylpropane sulfonate and 2-methyacryloyloxyethane sulfonate.
- 3. The graft copolymer of claim 2 wherein the graft copolymer is composed of
- (A) from about 1 weight percent to about 50 weight percent of polypropylene; and
- (B) the mole percent of the comonomer and ampholytic ion pair grafted therewith are in the range of
- (i) from about 75 mole percent to about 98 mole percent of acrylonitrile; and
- (ii) from about 2 mole percent to about 25 mole percent of the ampholytic ion pair.
- 4. The graft copolymer of claim 3 wherein the graft copolymer is composed of
- (A) from 5 weight percent to about 30 weight percent of polypropylene; and
- (B) the mole percent of the comonomer and ampholytic ion pair grafted therewith are in the range of
- (i) from about 80 mole percent to about 95 mole percent of acrylonitrile; and
- (ii) from about 5 mole percent to about 20 mole percent of the ampholytic ion pair
- wherein the ampholytic ion pair is 2-methyacryloyloxyethyldiethylammonium and 2-acrylamido-2-methylpropane sulfonate.
- 5. The graft copolymer of claim 3 wherein the graft copolymer is composed of
- (A) from about 5 weight percent to about 30 weight percent of polypropylene; and
- (B) the mole percent of the comonomer and ampholytic ion pair grafted therewith are in the range of
- (i) from about 80 mole percent to about 95 mole percent of acrylonitrile; and
- (ii) from about 5 mole percent to about 20 mole percent of the ampholytic ion pair
- wherein the ampholytic ion pair is 2-methacryloyloxyethyldiethylammonium and 2-methacryloyloxyethane sulfonate.
- 6. The graft copolymer of claim 2 wherein the graft copolymer is composed of
- (A) from about 1 weight percent to about 50 weight percent of polypropylene; and
- (B) the mole percent of the comonomer and ampholytic ion pair grafted therewith are in the range of
- (i) from about 80 mole percent to about 98 mole percent of acrylamide; and
- (ii) from about 2 mole percent to about 20 mole percent of the ampholytic ion pair.
- 7. The graft copolymer of claim 6 wherein the graft copolymer is composed of
- (A) from 5 weight percent to about 30 weight percent of polypropylene; and
- (B) the mole percent of the comonomer and ampholytic ion pair grafted therewith are in the range of
- (i) from about 85 mole percent to about 95 mole percent of acrylamide; and
- (ii) from about 5 mole percent to about 15 mole percent of the ampholytic ion pair
- wherein the ampholytic ion pair is 2-methyacryloyloxyethyldiethylammonium and 2-acrylamido-2-methylpropane sulfonate.
- 8. The graft copolymer of claim 6 wherein the graft copolymer is composed of
- (A) from about 5 weight percent to about 30 weight percent of polypropylene; and
- (B) the mole percent of the comonomer and ampholytic ion pair grafted therewith are in the range of
- (i) from about 85 mole percent to about 90 mole percent of acrylamide; and
- (ii) from about 10 mole percent to about 15 mole percent of the ampholytic ion pair
- wherein the ampholytic ion pair is 2-methyacryloyloxyethyldiethylammonium and 2-methacryloyloxyethane sulfonate.
- 9. The graft copolymer of claim 2 wherein the graft copolymer is composed of
- (A) from about 1weight percent to about 50 weight percent of polypropylene; and
- (B) the mole percent of the comonomer and ampholytic ion pair grafted therewith are in the range of
- (i) from about 80 mole percent to about 98 mole percent of alkali salt of acrylic acid; and
- (ii) from about 2 mole percent to about 20 mole percent of the ampholytic ion pair.
- 10. The graft copolymer of claim 9 wherein the graft copolymer is composed of
- (A) from 5 weight percent to about 30 weight percent of polypropylene; and
- (B) the mole percent of the comonomer and ampholytic ion pair grafted therewith are in the range of
- (i) from about 85 mole percent to about 97 mole percent of alkali salts of acrylic acid; and
- (ii) from about 3 mole percent to about 15 mole percent of the ampholytic ion pair
- wherein the ampholytic ion pair is 2-methacryloyloxyethyldiethylammonium and 2-acrylamido-2-methylpropane sulfonate.
- 11. The graft copolymer of claim 9 wherein the graft copolymer is composed of
- (A) from about 5 weight percent to about 30 weight percent of polypropylene; and
- (B) the mole percent of the comonomer and ampholytic ion pair grafted therewith are in the range of
- (i) from about 90 mole percent to about 97 mole percent of alkali salts of acrylic acid; and
- (ii) from about 3 mole percent to about 10 mole percent of the ampholytic ion pair
- wherein the ampholytic ion pair is 2-methacryloyloxyethyldiethylammonium and 2-methacryloyloxyethane sulfonate.
Parent Case Info
This application is a division of prior application Ser. No. 07/917,700, filed Jul. 21, 1992, now U.S. Pat. No. 5,206,326, which is a continuation under 37 C.F.R. 1.62, of prior application Ser. No. 07/665,880, filed on Mar. 7, 1991, now abandoned.
US Referenced Citations (5)
Divisions (1)
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917700 |
Jul 1992 |
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Continuations (1)
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665880 |
Mar 1991 |
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