(Meth)acrylic copolymer resin and coating film thereof

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

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C526S319000, C526S303100, C526S348100

Reexamination Certificate



A coating resin that is thermoplastic, exhibits good appearance, solvent resistance and adherence and is excellent in abrasion resistance; and a coting liquid or coating film thereof. In particular, a (meth)acrylic copolymer resin (A) produced by radical polymerization of 4 to 50 mass % of (meth)acrylic acid (a-1), 0.5 to 17 mass % of (meth)acrylamide (a-2), and 35 to 95.5 mass % of a compound having reactive unsaturated bond other than the compounds (a-1) and (a-2). With respect to the coating film produced therefrom, both the glass transition temperature Tg1 measured by means of a rigid-body pendulum type viscoelasticity measuring instrument and the glass transition temperature Tg2 measured by means of a differential scanning calorimeter (DSC) are 110° C. or higher. The coating film is an abrasion resistant film whose abrasion resistance measured in accordance with the Taber abrasion testing method is 80 rotations or greater.

patent: 3048501 (1962-08-01), Miller et al.
patent: 4692396 (1987-09-01), Uchida
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patent: 6013724 (2000-01-01), Mizutani et al.
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patent: 07-156567 (1995-06-01), None
patent: 10-017689 (1998-01-01), None
patent: 10-130338 (1998-05-01), None
patent: 10-130338 (1998-05-01), None
patent: 11-181334 (1999-07-01), None
patent: 2000-144049 (2000-05-01), None


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