Method for producing rubber modified thermoplastic resins

Details Method for producing rubber modified thermoplastic resins Method for producing rubber modified thermoplastic resins

C - Chemistry, Metallurgy

08

J

400/1100, 400/30

C08J 3/00 (2006.01) C08L 51/00 (2006.01) C08L 51/04 (2006.01) C08L 57/00 (2006.01) C08L 101/00 (2006.01)

Patent

CA 1291283

ABSTRACT OF THE DISCLOSURE Disclosed is a method for producing a rubber modified thermoplastic resin which comprises carrying out all or a part of the following steps (I) - (VI): (I) a step of mixing the following (A), (B), (C) and thermoplastic resin (2): (A) a latex of graft rubber polymer (1), (B) an organic agent which is capable of dissolving thermoplastic resin (2) and has a solubility in water of 5% by weight or less at a tempera- ture at which (A), (B), (C) and thermoplastic resin (2) are mixed, amount of the organic agent being 10-600% by weight of polymer (4) which is the sum of graft rubber polymer (1) and thermoplastic resin (2) and (C) a water soluble agent capable of coagulating latex (A), amount of this agent being 10% by weight or less of graft rubber polymer (1), (II) a step of separating and removing aqueous phase from a two-phase mixture obtained in the mixing step (I), (III) a step of mixing the mixture from which the aqueous phase has been removed at step (II) and the whole or a part of thermoplastic resin (3), (IV) a step of removing a part or the whole of organic agent (B) and remaining water from the mixture obtained at step (III) by a thermal means, (V) a step of mixing the remainder of thermoplastic resin (3) in case a part of thermoplastic resin (3) has been mixed at step (III), and (VI) a step of removing the remainder of organic agent (8) in case only a part of organic agent (B) has been removed at step (IV).

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