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
2008-01-23
2011-10-18
Choi, Ling (Department: 1762)
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...
C524S560000
Reexamination Certificate
active
08039541
ABSTRACT:
Disclosed are an industrially useful (meth)acrylic polymer particle for use in a plastisol which is excellent in storage stability, particularly under circumstance at 40° C. or above, so that it can suppress gelation and maintain a sol state during storage and which can give a shaped article excellent in flexibility and chipping resistance; a method for producing the (meth)acrylic polymer particle; and a plastisol composition made from the (meth)acrylic polymer particle. Specifically disclosed is a method for producing a (meth)acrylic polymer particle, which comprises polymerizing a monomer or monomer mixture (B) to form a polymer (b) in the presence of a polymer (a) obtained by polymerization of a monomer or monomer mixture (A), wherein a glass transition temperature (Tg) of the polymer (a) as calculated from the FOX equation is 90° C. or above, a solubility parameter of the polymer (a) is 19.90 (J/cm3)1/2or below, and a solubility parameter of the polymer (b) is 20.22 (J/cm3)1/2or above.
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Chin Hui
Choi Ling
Mitsubishi Rayon Co. Ltd.
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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