Claims
- 1. A polymer which is weakly basic at acidic pH, said polymer comprising recurring units derived by addition polymerization of a weakly basic ethylenically unsaturated polymerizable monomer of the structure (I): ##STR4## wherein R is hydrogen or methyl, and R.sup.1 is alkylene of 1 to 3 carbon atoms, or an acid addition salt of said monomer, wherein said polymer is a homopolymer of said monomer.
- 2. The polymer of claim 1 wherein R is methyl and R.sup.1 is alkylene of 2 or 3 carbon atoms.
- 3. The polymer of claim 1 wherein said weakly basic monomer is N-(3-imidazolylpropyl)-methacrylamide.
- 4. A polymer which is weakly basic and water soluble at acidic pH, said polymer comprising recurring units derived by addition polymerization from:
- (a) about 10 to about 99.9 weight percent of a weakly basic ethylenically unsaturated polymerizable monomer of the structure (I): ##STR5## wherein R is hydrogen or methyl, and R.sup.1 is alkylene of 1 to 3 carbon atoms, or an acid addition salt of said compound,
- (b) from about 0.1 to about 80 weight percent of a nonionic, hydrophilic, ethylenically unsaturated polymerizable monomer
- (b) from about 0.1 to about 80 weight percent of a nonionic, hydrophilic, ethylenically unsaturated polymerizable monomer selected from the group consisting of acrylamide, 2-hydroxyethyl acrylate, 2,3-dihydroxypropyl acrylate, 2,3-dihydroxypropyl methacrylate, N,N-dimethyl acrylamide, poly(ethyleneoxy) ethyl methacrylate having 2 to 10 ethyleneoxy groups, ethyl methacrylate and 2-hydroxyethylmethacrylate.
- 5. The polymer of claim 4 wherein R is methyl and R.sup.1 is alkylene of 2 or 3 carbon atoms.
- 6. The polymer of claim 4 wherein monomer (a) is N-(2-imidazolylethyl)methacrylamide, N-(3-imidazolylpropyl)acrylamide, N-(imidazolylmethyl)acrylamide or N-(3-imidazolylpropyl)methacrylamide.
- 7. The polymer of claim 4 wherein monomer (c) is a vinyl aromatic or acrylic ester.
- 8. The polymer of claim 4 which is poly[N-(3-imidazolylpropyl)methacrylamide hydrochloride], poly[N-(3-imidazolylpropyl)methacrylamide hydrochloride-co-acrylamide] or poly[N-(3-imidazolylpropyl)methacrylamide hydrochloride-co-2-hydroxyethyl methacrylate].
Parent Case Info
This is a division, of application Ser. No. 08/306,341, filed Sep. 15, 1994, which is now U.S. Pat. No. 5,434,270.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4766052 |
Nakamura et al. |
Aug 1988 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
306341 |
Sep 1994 |
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