US 11,834,549 B2
Method for producing polymerizable composition
Yukio Kageyama, Shinjuku-ku (JP); and Masahide Yamada, Shinjuku-ku (JP)
Assigned to HOYA LENS THAILAND LTD., Pathumthani (TH)
Appl. No. 16/642,802
Filed by HOYA LENS THAILAND LTD., Pathumthani (TH)
PCT Filed Mar. 29, 2019, PCT No. PCT/JP2019/014060
§ 371(c)(1), (2) Date Feb. 27, 2020,
PCT Pub. No. WO2019/189785, PCT Pub. Date Oct. 3, 2019.
Claims priority of application No. 2018-066228 (JP), filed on Mar. 29, 2018.
Prior Publication US 2020/0247942 A1, Aug. 6, 2020
Int. Cl. C08G 18/38 (2006.01); G02B 1/04 (2006.01); C08G 18/76 (2006.01); B29D 11/00 (2006.01); C08G 18/10 (2006.01); C08K 5/3475 (2006.01); B29K 75/00 (2006.01)
CPC C08G 18/7642 (2013.01) [B29D 11/00009 (2013.01); C08G 18/10 (2013.01); C08G 18/3876 (2013.01); C08K 5/3475 (2013.01); G02B 1/041 (2013.01); B29K 2075/00 (2013.01)] 7 Claims
 
1. A method for producing a polymerizable composition, the method comprising:
step (1) of adjusting a water content of a composition A comprising a polyisocyanate component to be 200 ppm by mass or less, the composition A not including a polymerization catalyst;
step (2) of mixing a polythiol component and a polymerization catalyst, thereby obtaining a composition B and then adjusting a water content of the composition B to be 1,000 ppm by mass or less; and
step (3) of mixing the composition A and the composition B, thereby obtaining a polymerizable composition,
wherein the polyisocyanate component is at least one selected from the group consisting of 2,5-bis(isocyanatomethyl)-bicyclo[2.2.1]heptane, 2,6-bis(isocyanatomethyl)-bicyclo[2.2.1]heptane, 1,3-bis(isocyanatomethyl)cyclohexane, 1,4-bis(isocyanatomethyl)cyclohexane, 1,3-bis(isocyanatomethyl)benzene, 1,4-bis(isocyanatomethyl)benzene, dicyclohexylmethane-4,4′-diisocyanate, isophorone diisocyanate, and hexamethylene diisocyanate,
the polythiol component is at least one selected from the group consisting of 2,5-bis(mercaptomethyl)-1,4-dithiane, pentaerythritol tetrakis(2-mercaptoacetate), pentaerythritol tetrakis(3-mercaptopropionate), 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 4,7-bis(mercaptomethyl)-3,6,9-trithia-1,11-undecanedithiol, 4,8-bis(mercaptomethyl)-3,6,9-trithia-1,11-undecanedithiol, 5,7-bis(mercaptomethyl)-3,6,9-trithia-1,11-undecanedithiol trimethylolpropane tris(2-mercaptoacetate), trimethylolpropane -tris(3-mercaptopropionate), butanediol bis(2-mercaptoacetate), butanediol bis(3-mercaptopropionate), dipentaerythritol hexakis(2-mercaptoacetate), and dipentaerythritol hexakis(3-mercaptopropionate), and
the polymerization catalyst is a tin compound or a nitrogen-containing compound.