The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 2021
Filed:
Oct. 16, 2018
Skc Co., Ltd., Gyeonggi-do, KR;
SKC CO., LTD., Gyeonggi-do, KR;
Abstract
Embodiments relate to a polymerizable composition for a plastic lens. The polymerizable composition for a plastic lens according to the embodiment further comprises a diketone compound for the purpose of controlling the strong activity of a halogenated tin-based catalyst. Further, the polymerizable composition is preliminarily polymerized at a low temperature of 5 to 20° C. for a certain period of time, specifically 1 to 20 hours. Since it is possible to stabilize the reaction rate of the composition and to properly control the viscosity of the composition, a more stable pot life is attained, thereby improving the workability. In addition, the generation of bubbles is prevented, thereby improving the transparency of the resin. Hence, the polymerizable composition can be advantageously used for fabricating various plastic lenses such as eyeglass lenses, camera lenses, and the like.