FIELD: organic chemistry. SUBSTANCE: invention proposes a mixture of polyethylene glycol monomethyl esters as an antihydrate addition agent of the general formula CH3O(OC2H4)nH, where n = 1-8, mean molecular mass 150-170 of the following composition, wt.-%: CH3OC2H4OH 5-20; CH3O(OC2H4)2H 17-30; CH3O(OC2H4)3H 22-29; CH3O(OC2H4)4H 13-25; CH3O(OC2H4)5H 6-17; CH3O(OC2H4)6H 2-9; CH3O(OC2H4)7 0.5-5, and CH3O(OC2H4)8H 0.1-1. Freezing point of an addition agent and water mixtures containing 20% water is 5-7 C lower as compared for dry addition agent. Also, the proposed addition agent exhibits low viscosity. Invention can be used in gas, petroleum and chemical industries. EFFECT: enhanced effectiveness of an addition agent.
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