Resin having improved powder characteristics suitable for...

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 51/04 (2006.01) C08J 3/16 (2006.01) C08L 25/14 (2006.01) C08L 27/06 (2006.01) C08L 55/02 (2006.01)

Patent

CA 2329840

A synthetic resin powder improved in granulation properties, blocking resistance and other powder characteristics, which is prepared by coagulating an MBS resin latex satisfying the following relationships (1) and (2), adding a hard polymer in the form of a latex or a coagulation slurry in an amount of 0.1 to 10 parts by weight per 100 parts by weight of the MBS resin, and recovering a powder from the resulting mixture: -1.5x + 140 <= y <= -1.65x + 180 (1) 55 <= x <= 70 (2) [wherein x is butadiene content (wt. %) of MBS resin; and y is Vicat softening point (~C) of MBS resin]. This synthetic resin powder is useful as impact modifier for vinyl chloride resins and can impart excellent impact resistance to vinyl chloride resins without lowering in the transparency of the resins.

La présente invention concerne une résine synthétique en poudre présentant des propriétés de granulation, une résistance de blocage et d'autres caractéristiques de poudre améliorées, obtenue par une coagulation d'un latex de résine MBS répondant aux relations suivantes (1) et (2), par l'ajout d'un polymère dur sous la forme d'un latex ou d'une bouillie de coagulation dans une proportion de 0.1 à 10 parties en poids par 100 parties en poids de la résine MBS, et la récupération du mélange ainsi obtenu: -1.5x + 140 <= y <= -1.65x + 180 (1); 55 <= x <= 70 (2) [où x est le contenu de butadiène (pourcentage en poids) de la résine MBS; et y est le point Vicat (·C) de la résine MBS]. Ladite résine synthétique en poudre est utile en tant qu'agent antichoc des résines de chlorure de vinyle et procure une excellente résistance au choc aux résines de chlorure de vinyle sans pour autant réduire la transparence desdites résines.

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