发明授权
US4608425A High charge density polymeric complexes - viscosifiers for acid, base and salt (aqueous) solutions 失效
高电荷密度聚合复合物 - 酸,碱和盐(水溶液)的增粘剂

High charge density polymeric complexes - viscosifiers for acid, base
and salt (aqueous) solutions
摘要:
The present invention relates to improved viscosification agents for a variety of aqueous solutions which comprise a family of intramolecular polymeric complexes (i.e., polyampholytes) which are copolymers of metal styrene sulfonate/methacrylamidoproplytrimethylammonium chloride (MAPTAC). The metal styrene sulfonate is an anionic monomer, while MAPTAC is cationically charged. These polyampholytes have approximately 1 to about 99 mole % of the anionic monomer and approximately 1 to about 99 mole % of the cationic moiety present within the macromolecular structure. These groups are not necessarily present in an equimolar charge ratio. The excess undissociated charge allows for facile dispensability or solubility of the polyampholytes into low ionic strength aqueous solutions.
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