Anionic copolymers prepared in an inverse emulsion matrix and their use in preparing cellulosic fiber compositions
First Claim
1. A water-soluble copolymer composition comprisingat least one associative inverse emulsion anionic copolymer, wherein the associative properties of the at least one associative inverse emulsion anionic copolymer are provided by an effective amount of at least one emulsification surfactant chosen from diblock and triblock polymeric surfactants wherein said at least one associative inverse emulsion anionic copolymer comprises:
- at least one nonionic polymer segment B comprised of one or more ethylenically unsaturated nonionic monomers, andat least one anionic polymer segment F comprised of one or more ethylenically unsaturated anionic monomers;
the molar % ratio of B;
F is from 95;
5 to 5;
95; and
wherein said at least one associative inverse emulsion anionic copolymer has a Huggins'"'"' constant (k′
) determined in 0.01 M NaCl greater than 0.75; and
said at least one associative inverse emulsion anionic copolymer has a storage modulus (G′
) in a 1.5 wt. % actives polymer solution at 4.6 Hz greater than 175 Pa.
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Abstract
A papermaking method and a composition which utilize, as a drainage aid, a water-soluble anionic copolymer prepared via a water-in-oil polymerization technique that, absent a cross-linking agent, is characterized by a Huggins'"'"' constant (k′) determined in 0.01M NaCl greater than 0.75 and a storage modulus (G′) for a 1.5 wt. % actives polymer solution at 4.6 Hz greater than 175 Pa.
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Citations
7 Claims
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1. A water-soluble copolymer composition comprising
at least one associative inverse emulsion anionic copolymer, wherein the associative properties of the at least one associative inverse emulsion anionic copolymer are provided by an effective amount of at least one emulsification surfactant chosen from diblock and triblock polymeric surfactants wherein said at least one associative inverse emulsion anionic copolymer comprises: -
at least one nonionic polymer segment B comprised of one or more ethylenically unsaturated nonionic monomers, and at least one anionic polymer segment F comprised of one or more ethylenically unsaturated anionic monomers; the molar % ratio of B;
F is from 95;
5 to 5;
95; andwherein said at least one associative inverse emulsion anionic copolymer has a Huggins'"'"' constant (k′
) determined in 0.01 M NaCl greater than 0.75; and
said at least one associative inverse emulsion anionic copolymer has a storage modulus (G′
) in a 1.5 wt. % actives polymer solution at 4.6 Hz greater than 175 Pa. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification