A kind of preparation method and application of polythiol compound containing 1,3,5-trithiane structure

A technology of polythiol compound and trithiane, which is applied in the field of optical materials, can solve the problems of large output of waste acid, unreusable catalyst, non-compliance with environmental protection requirements, etc., and achieves no discharge of three wastes, good heat resistance, and high refractive index. The effect of the index
CN109503549BActive Publication Date: 2020-09-22SHANDONG EFIRM BIOCHEMISTRY & ENVIRONMENTAL PROTECTION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG EFIRM BIOCHEMISTRY & ENVIRONMENTAL PROTECTION CO LTD
Publication Date
2020-09-22

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Abstract

The invention provides a preparation method for a polymercaptan compound containing a 1,3,5-trithian structure and an application thereof. The preparation method comprises the step of triggering 2,4,6-trichlorine alkyl-1,3,5-trithian with a structure shown as formula II and sodium bisulfide to react under the existence of phase transfer catalyst, thereby acquiring the polymercaptan compound containing the 1,3,5-trithian structure shown as formula I. The method is simple, is free from three-waste emission, meets environment-friendly requirement and is higher in reaction conversion rate. Besides, the method has higher selectivity and higher economic use ratio of atoms; the prepared product has higher refractive index and higher abbe value; a polymer compound formed by curing the polymercaptan compound containing the 1,3,5-trithian structure shown as formula I and diisocyanate has higher refractive indexm, higher abbe value and higher heat resistance.
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Description

technical field

[0001] The invention belongs to the technical field of optical materials, in particular to a preparation method and application of a polythiol compound containing a 1,3,5-trithiane structure. Background technique

[0002] The optical resin currently used to make lenses is light in weight, not easy to break and easy to color compared with glass, but the refractive index of similar CR-39 and PMMA materials is less than 1.50, so they are used as lens materials to process products with large thickness and The quality is heavy.

[0003] In order to obtain thin and light plastic lenses, the refractive index of the material should be increased. At present, the optical materials with this performance mainly include the polythiourethane (patent: CN201380029878) obtained by the reaction of polythiol and polyisocyanate introduced by Mitsui Corporation of Japan. The refractive index of this material can reach 1.67. Widely sold in the market. However, for lenses with h...

Claims

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