| US 7,531,580 B2 | ||
| Process for production of uv-curable liquid polyurethane resin | ||
| Tetsuya Watanabe, Kitaibaraki (Japan); Takashi Chiba, Kitaibaraki (Japan); and Shuzo Yamada, Fujisawa (Japan) | ||
| Assigned to Unimatec Co., Ltd., Tokyo (Japan) | ||
| Appl. No. 10/552,236 PCT Filed Apr. 07, 2004, PCT No. PCT/JP2004/004986 § 371(c)(1), (2), (4) Date Oct. 07, 2005, PCT Pub. No. WO2004/091211, PCT Pub. Date Oct. 21, 2004. |
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| Claims priority of application No. 2003-105981 (JP), filed on Apr. 10, 2003. | ||
| Prior Publication US 2006/0194938 A1, Aug. 31, 2006 | ||
| Int. Cl. C08F 2/46 (2006.01); C08F 2/50 (2006.01) | ||
| U.S. Cl. 522—174 [522/90; 522/96; 522/182; 522/113; 522/114; 522/120; 522/119; 522/150; 522/151; 522/152; 522/173; 522/178; 522/181] | 21 Claims |
| 1. A process for producing a gasket molding material applicable to an automatic coating robot, consisting of a UV-curable liquid polyurethane resin having a viscosity (25°) of 150,000-1,000,000 mPa·s, which comprises subjecting (A) a polycarbonatediol having a molecular weight of 500-5,000, (B) a trifunctional alcohol, and (C) a diisocyanate to reaction in the presence of (D) a (meth)acrylate compound represented by the general formula CH2═CRCO(OCnH2n)pR′ (where R is a hydrogen atom or a methyl group, R′ is a hydrogen atom, an alkoxyl group, or a phenoxy group, n is an integer of 1-12, and p is an integer of 1-5), or the general formula CH2═CRCO(OCmH2m)qOCOCR═CH2 (where R is a hydrogen atom or a methyl group, m is an integer of 2-12, and q is an integer of 1-14), and (E) a di(meth)acrylate compound of alkylene glycol whose alkylene group is substituted by a lower alkyl group having 1 to 5 carbon atoms, and by adding (F) a hydroxyl group-containing (meth)acrylate to the resulting solution of urethane oligomers in (meth)acrylate, thereby carrying out terminal (meth)acrylating reaction of the urethane oligomers. |