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Polymerizable composition, transparent resin, optical material, plastic lens, and method for manufacturing transparent resin

A technology of polymeric composition and cyanate compound, which is applied in optics, optical elements, optical components, etc., and can solve problems such as lens color deterioration, difficulty in handling polymeric compositions, and cloudy lenses

Active Publication Date: 2017-08-18
HOYA LENS THAILAND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the amount of impurities increases, the viscosity of the polymerizable composition obtained by mixing pentaerythritol mercaptocarboxylate and polyiso(thio)cyanate compound increases, and the handling of the polymerizable composition may become difficult.
In addition, when impurities increase, there may be problems such as deterioration of the color tone of the lens, and white turbidity in the lens.

Method used

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  • Polymerizable composition, transparent resin, optical material, plastic lens, and method for manufacturing transparent resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] (Determination of mercaptan equivalent)

[0104] Pentaerythritol tetramercaptoacetate (hereinafter referred to as PETMA) 62.8 parts by weight, bis(isocyanatomethyl) cyclohexane (hereinafter referred to as H6-XDI) 61.2 parts by weight, dimethyl tin dichloride 0.30 parts by weight and 0.30 parts by weight of a mixture of butoxyethyl acid phosphate and bis(butoxyethyl acid phosphate) (manufactured by Seonghoku Chemical Industry Co., Ltd., trade name: JP-506) were fully stirred and mixed at room temperature The obtained mixture was defoamed under a reduced pressure of 5 mmHg to prepare a homogeneous monomer mixture. This monomer mixture was poured into a molding die including a pair of glass molds and a resin spacer. In addition, the above-mentioned pair of glass molds used molds with an upper mold curvature of 600 mm and a lower mold curvature of 120 mm, and assembled the molds so that the central wall thickness of the plastic lens was 5 mm and the diameter was 75 mm.

...

Embodiment 2

[0107] Except having used PETMA different from the PETMA used in Example 1, it carried out similarly to Example 1, the polymeric composition was prepared, and the plastic lens of Example 2 was manufactured.

Embodiment 3

[0109] Except having used PETMA different from the PETMA used in Example 2, it carried out similarly to Example 2, the polymeric composition was prepared, and the plastic lens of Example 3 was manufactured.

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Abstract

Provided are: a polymerizable composition that can inhibit the occurrence of turbidity, optical distortion, and striae in a transparent resin obtained therefrom; the transparent resin obtained from the polymerizable composition; an optical material containing the transparent resin; a plastic lens containing the optical material; and a method for manufacturing the transparent resin. The polymerizable composition contains a polyiso(thio)cyanate compound and a polythiol compound that has at least three mercapto groups, wherein the polyiso(thio)cyanate compound consists of a polyiso(thio)cyanate compound containing no aromatic rings, and the polythiol compound has a thiol equivalence ratio, which is the ratio of the measured value of thiol equivalent to the theoretical value of thiol equivalent, of at least 0.900 but less than 1.000.

Description

technical field [0001] The present invention relates to a polymerizable composition comprising a polythiol compound and a polyisocyanate compound, a transparent resin obtained from the polymerizable composition, an optical material comprising the transparent resin, a plastic lens comprising the optical material, and production of the above-mentioned transparent resin method. Background technique [0002] It is known that a plastic lens having a high refractive index is obtained by reacting a polyisocyanate compound with a polythiol compound. For example, Patent Document 1 discloses a method of combining an aliphatic polyisocyanate compound with an aliphatic polysulfide such as pentaerythritol tetra-(mercaptoacetate) and trimethylolpropane tri-(mercaptoacetate). A composition obtained by mixing an alcohol compound is heated to manufacture a polyurethane-based plastic lens having a high refractive index. [0003] Patent Document 2 discloses a method of using pentaerythritol ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/38C08G18/72G02B1/04G02C7/02
CPCG02B1/04G02C7/02C08G18/722C08G18/73C08G18/753C08G18/755C08G18/758C08G18/246C08G18/3876B29D11/00009C08G18/38C08G18/72C08L75/04C08L2201/10C08G18/3857C08G2120/00
Inventor 饭岛孝幸上坂昌久
Owner HOYA LENS THAILAND LTD
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