Production of resin foam by aqueous medium

Details Production of resin foam by aqueous medium Production of resin foam by aqueous medium

C - Chemistry, Metallurgy

08

J

117/47

C08J 9/36 (2006.01) C08J 3/20 (2006.01) C08J 9/12 (2006.01) C08K 3/00 (2006.01)

Patent

CA 1214963

Abstract of the Disclosure A process f or producing a resin foam by using an aqueous medium, which comprises (a) treating a resin compound with said aqueous medium to cause the aqueous medium to adhere to and be held by the resin compound, said resin compound being composed of porous agglomerated particles result- ing from partial melt adhesion of thermoplastic resin particles coated with a fine hydrophilic solid powder which does not substantially melt at the melting tem- perature of the resin particles, said solid powder being embedded in the resin particles but partly exposed at their surfaces, (b) melt-kneading the resin compound treated with the aqueous medium under such an elevated pressure that evaporation of the aqueous medium is substantially inhibited, and (c) thereafter releasing the kneaded resin composition from the pressurized state to foam it; and a thermoplastic resin compound used for the afore- said process.

449980

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