Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2007-02-06
2007-02-06
Egwim, Kelechi C. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C523S201000, C526S201000, C525S902000
Reexamination Certificate
active
10472593
ABSTRACT:
The invention relates to an acrylic impact modifier having a core-shell structure that provides an acrylic impact modifier composition comprising (a) a rubber core containing an alkyl acrylate polymer comprising at least two layers having different cross-linking densities, and (b) a shell containing an alkyl methacrylate polymer; to a process for the preparation of the acrylic impact modifier; and to a poly(vinyl chloride) composition comprising it. The acrylic impact modifier imparting excellent impact resistance was invented by employing multi-stage polymerization and at the same time by controlling the swelling index of rubber particles by changing the degree of cross-linking from stage to stage. And the poly(vinyl chloride) comprising the impact modifier of the present invention has good weatherability as well as excellent impact strength.
REFERENCES:
patent: 4520166 (1985-05-01), Kamada et al.
patent: 4564653 (1986-01-01), Kamada et al.
patent: 4670509 (1987-06-01), Aoyama et al.
patent: 4966942 (1990-10-01), Sasaki et al.
patent: 5194498 (1993-03-01), Stevenson et al.
patent: 5382625 (1995-01-01), Lindner et al.
patent: 5612413 (1997-03-01), Rozkuszka et al.
patent: 5773520 (1998-06-01), Bertelo et al.
patent: 0 527 605 (1993-02-01), None
patent: 0 921 138 (1999-06-01), None
patent: 1 106 649 (2001-06-01), None
patent: 1 167 407 (2002-01-01), None
patent: 59033342 (1984-02-01), None
patent: 10324787 (1998-12-01), None
patent: 11-147991 (1999-02-01), None
patent: 11209545 (1999-08-01), None
patent: 00160333 (1998-08-01), None
patent: WO 01/72896 (2001-10-01), None
Ahn Jeong-Heon
Han Chang-Sun
Han Seon-Hee
Lee Kwang-Jin
Lee Yong-Hun
Cantor & Colburn LLP
Egwim Kelechi C.
LG Chem Ltd.
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