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Styrene-based optical resin composition

A styrenic resin, styrenic technology, applied in optics, optical components, light guides, etc., can solve the problems of decreased brightness and transmittance of displays, and achieve low water absorption, low water absorption, and excellent colorless transparency. Effect

Active Publication Date: 2017-07-14
TOYO STIRENE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] If the molded product becomes cloudy, in the case of a long optical path such as a light guide plate, there is a problem that the transmittance will be greatly reduced due to light scattering, and the brightness of the display will decrease.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1～1-33、 comparative example 1-1～1-9

[0113] With the content shown in Table 2, using a single-screw extruder with a screw diameter of 40 mm, styrene resins A-1 to A-3 and additives were melt-kneaded at a cylinder temperature of 230°C and a screw speed of 100 rpm to obtain Particles. The additives used in Table 2 are as follows.

[0114] B-1: Vinyl dodecyl polyoxyethylene ether ethylene oxide average added mole number = 25 (EMULGEN 123P manufactured by Kao Corporation)

[0115] B-2: Vinyl octadecyl polyoxyethylene ether ethylene oxide average added mole number = 12 (EMULGEN 320P manufactured by Kao Corporation)

[0116] B-3: Vinyl dodecyl polyoxyethylene ether ethylene oxide average added mole number = 9 (EMULGEN 109P manufactured by Kao Corporation)

[0117] B-4: Vinyl cetyl polyoxyethylene ether ethylene oxide average added mole number = 7 (EMULGEN 210P manufactured by Kao Corporation)

[0118] B-5: Vinyl dodecyl polyoxyethylene ether ethylene oxide average added mole number = 30 (EMULGEN 130K manufactured by Kao Corpor...

Embodiment 2-1～2-46

[0169] The first reactor and the second reactor as a complete mixing type stirred tank and the third reactor as a plug flow reactor with a static mixer are connected in series to form the polymerization process, as shown in Table 1. The styrene resin was produced under the conditions shown. The capacity of each reactor is 39 liters for the first reactor, 39 liters for the second reactor, and 16 liters for the third reactor. The raw material solution was prepared with the raw material composition described in Table 1, and the raw material solution was continuously supplied to the first reactor at the flow rate described in Table 1.

[0170] In addition, at the entrance of the third reactor, a hydrophilic additive having a polyether chain was added so as to have the kind and content shown in Table 3. The types of additives and polyethylene glycol used are as follows.

[0171] B-1: Polyethylene glycol with an average molecular weight of 400 (PEG#400 manufactured by NOF Corporation) ...

Embodiment 3-1～3-36

[0212] The evaluation was carried out in the same manner as in Test 2, except that Compound X was not added in Test 3. In Examples 3-1 to 3-32, the styrene resin A-1 produced under Condition 1 was used, and in Examples 3-33 to 3-34, the styrene resin A-2 produced according to Condition 2 was used. In Examples 3-35 to 3-36, the styrene resin A-3 prepared under Condition 3 was used.

[0213] The results are shown in Table 4.

[0214] 【Table 4】

[0215]

[0216] Referring to Table 4, it can be seen that all the examples have excellent whitening suppression effects. In addition, comparing Examples 3-1 to 3-24 and Examples 3-25 to 3-32, it can be seen that when the content of phosphorus-based D is 0.05 to 0.40% by mass and the content of phenol-based E is 0.02 to 0.30% by mass, long-term The thermal stability is particularly excellent. In addition, referring to Examples 3-33 to 3-36, the same results can be obtained when the styrene-based resin is a copolymer of a styrene-based monome...

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Abstract

The present invention addresses the problem of providing a transparent styrene-based optical resin composition that minimizes a shortcoming of styrene-based resins, namely that environmental changes such as changes in temperature or humidity, or immersion in water cause the clouding (bleaching) of molded products thereof. The present invention provides a styrene-based optical resin composition that contains a styrene-based resin having a weight-average molecular weight of 150,000-700,000 and a hydrophilic additive, and is characterized in that the hydrophilic additive: is at least one substance selected from among polyoxyethylene surfactants having an average added mole number of ethylene oxide of 3-150 and / or polyethylene glycols having an average molecular weight of 200-10,000; has an HLB value of 5-20; and composes 0.4-2.0 mass% of the 100 mass% of the styrene-based resin composition.

Description

[0001] This application is a divisional application of the original application with application publication number CN103998514A. The original application was filed on December 19, 2012, the application number is 201280061401.7, and the invention title is "Optical Styrene Resin Composition". Technical field [0002] The present invention relates to a transparent styrene-based resin composition capable of suppressing whitening caused by environmental changes. Background technique [0003] For styrene-based resins, it has excellent transparency, rigidity, low water absorption, dimensional stability and other characteristics, and excellent molding processability. Therefore, through various molding methods such as injection molding, extrusion molding, and blow molding, It can be widely used as electrical products and various industrial materials, food packaging containers, groceries, etc. In addition, it can also be used for optical components such as a light guide plate as a purpose ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/08C08L33/12C08L71/02G02B6/00
CPCC08K5/1345C08K5/1575C08K5/526C08K5/527C08L25/08C08L25/14C08L33/12C08L2201/08C08L2201/10G02B6/0013G02B6/0065C08L71/02C08K5/13C08K5/49C08K5/053
Inventor 西野广平藤松秀隆塚田雅史佐藤诚
Owner TOYO STIRENE CO LTD
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