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US 12,583,963 B2Granted
Polymerizable composition and optical material using the same
AssigneeSK Pucore Co., Ltd.
InventorsHyuk Hee Han, Eui Jun Choi, Kyeong Hwan You, Jung Hwan Myung, Jae Young Pai, Jeong Moo Kim, Jung Hwan Shin
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Abstract
A polymerizable composition according to an embodiment includes a first polymerizable compound including isophorone diisocyanate and hexamethylene diisocyanate, and a second polymerizable compound including 4-mercaptomethyl-3,6-dithia-1,8-octanedithiol and pentaerythritol tetrakis(mercaptoacetate). An optical material which is fabricated from the polymerizable composition and has improved optical, mechanical and thermal properties is provided.
Claims12
A polymerizable composition, comprising:
- a first polymerizable compound comprising isophorone diisocyanate and hexamethylene diisocyanate;
- and
- a second polymerizable compound comprising 4-mercaptomethyl-3,6-dithia-1,8-octanedithiol and pentaerythritol tetrakis(mercaptoacetate),
- wherein a weight ratio of the isophorone diisocyanate relative to hexamethylene diisocyanate is in a range from 1 to 9, and
- wherein an amount of 4-mercaptomethyl-3,6-dithia-1,8-octanedithiol is in a range from 30 parts by weight to 45 parts by weight, and an amount of pentaerythritol tetrakis(mercaptoacetate) is in a range from 6.69 parts by weight to 20 parts by weight, based on 100 parts by weight of the first polymerizable compound and the second polymerizable compound.
2 more elements
Dependencies are inferred from the claim text.