Claims
- 1. In an anionically polymerized addition polymer of at least one ester of methacrylic acid the improvement wherein the polymer comprises mers having the formula ##STR8## wherein R is an acryloyloxyalkyl or a methacryloyloxyalkyl group, having up to 4 carbon atoms in the alkyl portion, and, optionally, mers derivable from other anionically copolymerizable monomers, and wherein, n, the average chain length of the polymer, is about 6 to 50 mers.
- 2. The polymer of claim 1 in which the polymerization is carried out, in the presence of a chain-regulating agent and a catalytic amount of an anion, using controlled rates of addition of at least one of the ester, the chain-regulating agent and the anion.
- 3. The polymer of claim 2 wherein the anion is an alkoxide.
- 4. The polymer of claim 3 wherein the chain-regulating agent is an alcohol.
- 5. The polymer of claim 4 wherein at least about 85% by weight of the molecules of the polymer have chain lengths of about .sqroot.2n to about 2n mers.
- 6. The polymer of claim 5 wherein the average chain length is about 6 to about 25 mers.
- 7. The polymer of claim 5 wherein the polymer also comprises mers having the formula ##STR9## wherein R.sup.1 is a (C.sub.1 -C.sub.24)alkyl group.
- 8. The polymer of claim 7 wherein R.sup.1 is a (C.sub.1 -C.sub.4)alkyl group.
- 9. The polymer of claim 7 represented by the formula: ##STR10## wherein R"O represents the residue of the chain-regulating alcohol used in the polymerization reaction,
- R'o represents the alcohol portion of an ester of methacrylic acid,
- M represents the residue of the interspersed comonomer or comonomers, and
- n' and n" are integers of one or more, wherein the sum of n' and n" is 3 to 90.
- 10. A process comprising the steps (1) preparing an anionically polymerized addition polymer of at least one ester of methacrylic acid, optionally, comprising mers derivable from other anionically copolymerizable monomers, and wherein n, the average chain length of the polymer, is about 6 to 50 mers; and (2) introducing pendant acrylate or methacrylate functionality into the polymer.
- 11. The process of claim 10 wherein the pendant functionality is introduced by esterifying an acid-containing polymer with a glycidyl acrylate or methacrylate, by reacting a glycidyl functional polymer with acrylic or methacrylic acid or by reacting a hydroxyl functional polymer with a lower alkyl ester of acrylic or methacrylic acid.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of our pending application U.S. Ser. No. 3,711,921, filed June 20, 1973, which is a continuation-in-part of our pending application U.S. Ser. No. 137,057, filed on Apr. 23, 1971, both abandoned.
US Referenced Citations (3)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1,054,018 |
Jan 1967 |
UK |
Non-Patent Literature Citations (4)
Entry |
Shimomura et al., Kogyo Kagaku Zasshi, 1968 71/7 pp. 1070-1074. |
Trekoval et al. Cemicky Prumysl, 18(6) p. 312 (1968). |
Trekovel et al. Jrnl. of Polym. Science, Part C, vol. 4, p. 333 (1963). |
Kanai et al. Kogyo Kagaku Zasshi 68(10) 1947 (1965). |
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
371921 |
Jun 1973 |
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Parent |
137057 |
Apr 1971 |
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