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US5153289A Betaine copolymers-viscosifiers for water and brine 失效
甜菜碱共聚物 - 用于水和盐水的增粘剂

Betaine copolymers-viscosifiers for water and brine
摘要:
A water soluble copolymer having the structure: ##STR1## wherein X is about 1 to about 99 mole percent and y is about 99 to about 1 mole percent.
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