Nippon Mektron Limited

Nippon Miktron Limited

Kazuma Yokoi

Haruyoshi Tatsu

Yuichi Yamamoto

Toshimasa Sagawa

Takao Iida

An acrylic elastomer capable of giving a vulcanization product having a distinguished tensile strength and a good stretching even by cross-linking with an organic peroxide can be obtained by using an organic peroxide having a non-conjugated double bond as a polymerization initiator in polymerization of at least one of (a) alkyl acrylates having an alkyl group of 1 to 8 carbon atoms and (b) alkoxyalkyl acrylates having an alkoxylalkyl group of 2 to 8 carbon atoms.

Process for producing acrylic elastomer

A vulcanizable acrylic rubber composition comprising an acrylic rubber containing an active halogen group and a carboxyl group, trithiocyanuric acid, and a metal salt of dithiocarbamic acid alone or together with thiuram sulfide gives a vulcanized product having very good compression set and tensile strength even if the secondary vulcanization is omitted.

Acrylic rubber composition containing trithiocganuric acid, a metal suit

Acrylic elastomer obtained by copolymerization of an epoxy group-containing vinyl monomer and an .alpha., .beta.-unsaturated carboxylic acid aryl ester can produce vulcanization products having good compression set and heat resistance when vulcanized together which (1) a cyanuric acid and (2) a quaternary ammonium salt or phosphonium salt as cross-linking agents without secondary vulcanization.

Acrylic elastomer and its vulcanizable composition

An acrylic elastomer capable of giving a vulcanization product having a distinguished tensile strength and a good stretching even by cross-linking with an organic peroxide can be obtained by using an organic peroxide having a non-conjugated double bond as a polymerization initiator in polymerization of at least one of (a) alkyl acrylates having an alkyl group of 1 to 8 carbon atoms and (b) alkoxyalkyl acrylates having an alkoxyalkyl grouop of 2 to 8 carbon atoms.

Acrylic elastomer obtained by copolymerization of an epoxy group-containing vinyl monomer and an .alpha.,.beta.-unsaturated carboxylic acid aryl ester can produce vulcanization products having good compression set and heat resistance when vulcanized together which (1) a cyanuric acid and (2) a quaternary ammonium salt or phosphonium salt as cross-linking agents without secondary vulcanization.

Hexafluoroacetone hydrate is obtained with a high current efficiency by electrolytically oxidizing dimer or monomer of hexafluoro-.alpha.-hydroxyisobutanoic acid in an electrolytic solution composed of an aqueous solution of (1) a nickel salt and (2) HCl, HBr or an alkali metal or alkaline earth metal thereof.

Growing community of inventors

Takahagi, Japan

Kazuma Yokoi