US 12,343,905 B2
Method for producing cycloolefin resin-decorative molded article
Masaki Takeuchi, Tokyo (JP)
Assigned to RIMTEC CORPORATION, Tokyo (JP)
Appl. No. 17/604,543
Filed by RIMTEC Corporation, Tokyo (JP)
PCT Filed Apr. 20, 2020, PCT No. PCT/JP2020/017059
§ 371(c)(1), (2) Date Oct. 18, 2021,
PCT Pub. No. WO2020/218242, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 2019-081554 (JP), filed on Apr. 23, 2019.
Prior Publication US 2022/0212381 A1, Jul. 7, 2022
Int. Cl. B29C 37/00 (2006.01); B29C 39/12 (2006.01); B29C 45/16 (2006.01); B29C 67/24 (2006.01); B29C 70/00 (2006.01); B29C 70/08 (2006.01); B29C 70/48 (2006.01); B29K 23/00 (2006.01); B29K 309/00 (2006.01)
CPC B29C 37/0032 (2013.01) [B29C 39/12 (2013.01); B29C 45/16 (2013.01); B29C 67/246 (2013.01); B29C 70/003 (2021.05); B29C 70/086 (2013.01); B29C 70/48 (2013.01); B29C 2037/0035 (2013.01); B29K 2023/38 (2013.01); B29K 2309/00 (2013.01)] 3 Claims
 
1. A method for producing a decorated cycloolefin resin molded article, comprising:
curing a gel coat composition containing a base resin and a thermal curing agent and polymerizing a cycloolefin polymerizable composition containing a radical generator at the same timing while the gel coat composition is in contact with the cycloolefin polymerizable composition, thereby obtaining the decorated cycloolefin resin molded article including a gel coat obtained by curing the gel coat composition and a cycloolefin resin layer obtained by polymerizing the cycloolefin polymerizable composition adhering to each other,
wherein an amount of the thermal curing agent is 0.2 to 4 parts by mass relative to 100 parts by mass of the base resin, a content of a curing accelerator in the gel coat composition is 1 mass % or less, and the cycloolefin polymerizable composition further comprises an isocyanate compound and/or a polyfunctional acrylate compound,
the isocyanate compound is at least one selected from the group consisting of 4,4′-methylenediphenyl diisocyanate, toluene-2,4-diisocyanate, 4-methoxy-1,3-phenylene diisocyanate, 4-isopropyl-1,3-phenylene diisocyanate, 4-chloro-1,3-phenylene diisocyanate, 4-butoxy-1,3-phenylene diisocyanate, 2,4-diisocyanate diphenyl ether, 1,4-phenylene diisocyanate, tolylene diisocyanate, xylylene diisocyanate, 1,5-naphthalene diisocyanate, benzidine diisocyanate, o-nitrobenzidine diisocyanate, 4,4′-dibenzyl diisocyanate, methylene diisocyanate, 1,4-tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, 1,10-decamethylene diisocyanate, 4-cyclohexylene diisocyanate, 4,4′-methylene bis(cyclohexyl isocyanate), 1,5-tetrahydronaphthalene diisocyanate, isophorone diisocyanate, hydrogenated 4,4′-methylenediphenyl diisocyanate, hydrogenated xylylene diisocyanate, and a polyurethane prepolymer prepared by reacting these diisocyanate compounds with a low molecular weight polyol or polyamine to be isocyanate terminated, and
the polyfunctional acrylate compound is at least one selected from the group consisting of ethylene glycol dimethacrylate, triethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, and neopentyl glycol dimethacrylate.