C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/1112, 400/11
C08F 279/02 (2006.01) C08F 285/00 (2006.01) C08L 51/04 (2006.01) C08L 101/00 (2006.01)
Patent
CA 1162679
ABSTRACT OF THE DISCLOSURE In a process comprising adding an ethylenic monomer or monomer mixture (B) to a rubbery polymer (A) latex, emulsion-polymerizing it to produce a graft copolymer (C) latex, then adding an acidic substance or an electrolyte to said graft copolymer (C) latex to partially coagulate the latex, thereafter either first adding an ethylenic monomer or monomer mixture (D) and then adding a suspension polymerization stabilizer or simultaneously adding an ethylenic monomer or monomer mixture (D) and a suspension polymerization to obtain a graft copolymer (E) in the form of beads, a process for producing an impact-resistant resin wherein: (1) said rubbery polymer (A) contains at least 60% by weight of a diene monomer component and has a degree of swelling of 10-35, a gel content of 70% by weight or more and a weight average particle diameter of 0.2-0.5 µ and the major part of the particles has a particle diameter ranging from 0.03 µ to 1.0 µ; (2) said ethylenic monomer or monomer mixture of (B) and (D) independently comprises 50-100% by weight of an aromatic vinyl monomer and 50-0% by weight of a vinyl monomer copolymerizable therewith; and; (3) said graft copolymer (C) has a free polymer rate of 10% or higher and a reduced viscosity (?sp/C), determined by dissolving 0.1 g of its acetone-soluble fraction into 100 ml of N,N-dimethylformamide and measuring the viscosity at 25°C, of 0.3-1.0 dl/g.
369106
Kishida Kazuo
Narita Toshihito
Nishida Kozi
Sato Yasumasa
Yamamoto Naoki
Gowling Lafleur Henderson Llp
Mitsubishi Rayon Co. Ltd.
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