Rubber-containing graft polymer, resin composition containing rubber-containing graft polymer, and shaped article of same
AssigneeMitsubishi Chemical Corporation
InventorsMisaki Hagi, Shinji Matsuoka, Masashi Iimori, Masahiro Ueda, Hiroya Arai
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Abstract
Provided is a rubber-containing graft polymer capable of reducing wet heat aging of a shaped article while improving the strength developing property of a thermoplastic resin. In the rubber-containing graft polymer of the present invention, a content of components having a weight-average molecular weight of 800,000 or more is 1% by mass or more with respect to an organic solvent-soluble fraction (100% by mass) of the rubber-containing graft polymer, and a phosphorus content in the rubber-containing graft polymer is 3 to 30 mmol/kg.
Claims14
A rubber-containing graft polymer obtained by graft-polymerizing grafting vinyl monomers to a rubber latex, comprising:
- grafted rubber crosslinking components including a graft chain derived from the grafting vinyl monomers (Rg);
- non-grafted rubber crosslinking components (R0);
- grafted rubber non-crosslinking components including a graft chain derived from the grafting vinyl monomers (Ng);
- and
- rubber non-crosslinking components (N0);
- wherein
- an organic solvent-insoluble fraction of the rubber-containing graft polymer is a component of Rg and R0,
- the rubber-containing graft polymer comprises 92 wt % to 99.5 wt % of the organic solvent-insoluble fraction,
- a content of components having a weight-average molecular weight of 800,000 or more is 1% by mass or more with respect to 100% by mass of an organic solvent-soluble fraction of the rubber-containing graft polymer, and
- a phosphorus content in the rubber-containing graft polymer is 3 to 30 mmol/kg.
A rubber-containing graft polymer obtained by emulsion-graft- polymerizing grafting monomers containing a methacrylate alkyl ester to a diene-based rubber latex using a persulfate and a phosphorus-based emulsifier, the diene-based rubber latex being obtained by polymerization using a phosphorus-based emulsifier, comprising
- grafted rubber crosslinking components including a graft chain derived from the grafting vinyl monomers (Rg);
- non-grafted rubber crosslinking components (R0);
- grafted rubber non-crosslinking components including a graft chain derived from the grafting vinyl monomers (Ng);
- and
- rubber non-crosslinking components (N0);
- wherein
- an organic solvent-insoluble fraction of the rubber-containing graft polymer is a component of Rg and R0, and
- the rubber-containing graft polymer comprises 92 wt % to 99.5 wt % of the organic solvent-insoluble fraction, and
- a content of components having a weight-average molecular weight of 800,000 or more is 1% by mass or more with respect to 100% by mass of an organic solvent-soluble fraction of the rubber-containing graft polymer.
Dependencies are inferred from the claim text.