Patent ID: 6841653

Claim:
A thiol carboxylate ester composition, comprising: a) a thiol carboxylate ester as shown by general formula (I) below: (wherein: R denotes H or —CH 3 ; and X denotes —CH 2 CH 2 SCH 2 CH 2 —, —CH 2 CH 2 OCH 2 CH 2 —, or —CH 2 CH 2 —); b) a half ester as shown by general formula (II) below, of 0.0001 to 2 mass % relative to the thiol carboxylate ester: (wherein: R denotes H or —CH 3 ; and X denotes —CH 2 CH 2 SCH 2 CH 2 —, —CH 2 CH 2 OCH 2 CH 2 —, or —CH 2 CH 2 —); c) wherein said composition has a halogen content of not more than 2 mass % relative to the thiol carboxylate ester; and d) wherein said composition includes a polymerization inhibitor, wherein said polymerization inhibitor is a member selected from the group consisting of hydroquinone, phenothiazine, p-methoxyphenol, benzoquinone, hindered amine, and a catechol family member of general formula (4) below: wherein each of R 1 , R 2 , R 3 , and R 4 denotes a hydrogen atom, a hydroxyl group, or any alkyl groups having 1 to 4 carbon atoms.