Aqueous quenching medium containing salts of polymeric materials
AssigneeToho Chemical Industry Co., Ltd.
InventorsTakashi Tokuue, Takashi Kato
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Abstract
A novel quenching medium for steel is provided. The quenching medium is a 0.5-10 wt. % aqueous solution of polyacrylic acid, polymethacrylic acid, a copolymer of acrylic acid and methacrylic acid, or a salt thereof. Intrinsic viscosity [.eta.] of the polymer is from 0.010 to 0.050 l/g. The quenching medium is superior in various quenching characteristics to conventional quenching media.
Claims3
A quenching medium comprising an aqueous solution containing 0.4 to 10% by weight of a polymer mixture consisting essentially of 40 to 60% by weight of sodium or potassium polyacrylate and 60 to 40% by weight of a sodium or potassium salt of a copolymer of acrylic acid and methacrylic acid, said polyacrylate and copolymer of acrylic acid and methacrylic acid each having an intrinsic viscosity [.eta.] of 0.010 to 0.050 l/g.
Dependencies are inferred from the claim text.