发明授权
US4320024A Hydraulic fluids containing cyano derivatives of cyclic ketals and acetals 失效
含有环状缩酮和缩醛的氰基衍生物的液压油

Hydraulic fluids containing cyano derivatives of cyclic ketals and
acetals
摘要:
Hydraulic fluids having high wet equilibrium reflux boiling points, good chemical stability and other desirable characteristics are made from certain cyano-substituted derivatives of cyclic ketals or acetals of the formula ##STR1## wherein A, B and R are specified radicals.
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