FIELD: chemistry.
SUBSTANCE: invention concerns polymers containing betaine-type links and application of zwitterions polymers in washer fluids and claims a zwitterions polymer containing at least 35% of links with betaine group, where betaine group includes one cation and one anion group, and additional alkoxylated or hydroxylated links. Also, a washer fluid containing the new polymer is claimed. The claimed polymer can be applied as a clay swelling inhibitor, agent reducing clay mortar filtration, and/or lubricant in well drilling process.
EFFECT: new polymer applicable in silicate-based washer fluids.
40 cl, 2 tbl, 8 ex
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