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Polyurethane resin composition for optical lenses and impact strength synethtic resin lenses

A polyurethane resin and optical lens technology, applied in optics, optical components, optical components, etc., can solve problems such as inability to use, and achieve the effects of good precision, improved molding efficiency, and excellent surface accuracy

Inactive Publication Date: 2003-10-22
TALEX OPTICAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, since urethane resin contains aromatic isocyanate, which is easy to change color, as its material, there is a problem that it cannot be used in applications requiring light colors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiments of the present invention will be specifically described below. In the examples, all "parts" and "%" mean parts by weight and % by weight unless otherwise specified.

[0051] In a 500 mL separable flask (separable flask) equipped with a thermometer, a stirrer and a sealed tube, 200 parts of polytetramethylene ether glycol (PTG1000 produced by Hodogaya Chemical Industry Co., Ltd., average molecular weight (MW) 1000) was added As the polyol component A and 4 parts of trimethylolpropane (TMP) as the polyol component B, the temperature was raised while stirring under a nitrogen stream, and dehydration was performed at 100° C. and a reduced pressure of 5 to 10 mmHg for 1 hour. Cool after dehydration, and add 224 parts of 4,4'-methylene bis(cyclohexyl isocyanate) (Desmodur W produced by Sumitomo Bayer Polyurethane Co., Ltd.) at 80°C as isocyanate component H 12 MDI, react at 100°C to 110°C for 8 hours to obtain a prepolymer. The reaction molar ratio (NCO / OH) at t...

Embodiment 2

[0061] Using the reaction apparatus used in Example 1, in a separable flask, add 200 parts of polytetramethylene ether glycol (PTMG650 produced by Mitsubishi Chemical Industry Co., Ltd., average molecular weight 650) as polyol component A', 4 parts of polyol Alcohol component B (TMP) was dehydrated in the same manner as in Example 1. After dehydration, cool, add 196 parts of isophorone diisocyanate (Desmodur I produced by Sumitomo Bayer Polyurethane Co., Ltd.) at 80°C as the isocyanate component IPDI, and react at 100°C to 110°C for 4 hours to obtain a prepolymer. The reaction molar ratio (NCO / OH) at this time was 2.5.

[0062] To this prepolymer, 500 ppm of internal release agent A, 200 ppm of internal release agent B, and 0.5% of ultraviolet absorber Kemisorb 111 were added and dissolved. The obtained prepolymer was pale yellow and transparent, had an NCO content of 10.9%, and a viscosity of 11000 mPa·s (30° C.).

[0063] Then, 100 parts of the prepolymer and 34.6 parts of...

Embodiment 3

[0069] Using the reaction device used in Example 1, in a separable flask, 200 parts of polyol component A, 8 parts of trimethylolpropane (TMP) are added as polyol component B, dehydration under the same conditions as in Example 1 . After dehydration, cooling, at 80°C, add 179 parts of norbornane diisocyanate, namely 2,5(6)-diisocyanatomethylbicyclo[2,2,1]heptane (NBDI produced by Mitsui Takeda Chemical Co., Ltd.) NBDI as an isocyanate component was reacted at 100° C. to 110° C. for 4 hours to obtain a prepolymer having a reaction molar ratio (NCO / OH) of 3.0.

[0070] In this prepolymer, add 500ppm of internal release agent A, 200ppm of internal release agent B, 0.5% Kemisorb 111 produced by Chemipro as a UV absorber, and further add 5ppm of violet dye Oplas Violet 730 (produced by Dongfang Chemical) , to dissolve it.

[0071]The obtained prepolymer was light blue and transparent, had an NCO content of 12.6%, and a viscosity of 5000 mPa·s (30° C.).

[0072] Then, 100 parts o...

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Abstract

A polyurethane resin composition for moulding optical lenses contains, as essential components, a prepolymer produced by the reaction of two or more isocyanate aliphatic cyclic multi-isocyanate with two or more hydroxy polyalcohol, interior mold releasing agent including alkyl phosphate salt or fluorin-containing non-ionic surfactant or both, an aromatic diamine decolored by adding antioxidant in it when Gardner's chromatic number of 4,4'-methylene-bis(2-chloroaniline) is less 2 by purification. The invention also concerns impact strength synthetic resin lenses produced by casting and solidifying the polyurethane resin composition for moulding optical lenses. The impact strength synthetic resin lenses provided by the invention, can improve the transparency of an impact-resistant polyurethane type material for synthetic resin-made lenses while improve release property to increase productivity free of striae.

Description

technical field [0001] The present invention relates to a polyurethane resin composition for optical lens molding used in transparent lenses, sunglasses lenses, polarized lenses and other optical lenses, as well as impact-resistant synthetic resin lenses obtained by casting the same and its production method. Background technique [0002] General plastic lenses are lighter than glass lenses, are less fragile, and are easily stained, so they have been popularized in a wide range of fields from spectacle lenses to optomechanical lenses in recent years. [0003] Also, in recent years, consumers have become increasingly concerned about the safety of eyeglasses, and in particular, there has been an increasing demand for unbreakable lenses for sports sunglasses and casual sunglasses. Representative examples of current lens materials include diethylene glycol bis(allyl carbonate) (hereinafter referred to as CR-39), other polycarbonate resins, polymethyl methacrylate (PMMA) resins,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/04C08G18/12C08G18/48C08G18/66C08G18/75C08L75/04
CPCC08G18/4854C08G18/751C08G18/758C08G18/12C08G18/6677C08G18/3814C08G18/06
Inventor 田村皖一光内祥一张崇棠
Owner TALEX OPTICAL
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