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Light diffusion resin composition

A technology of resin composition and light diffusion, applied in optics, optical components, instruments, etc., can solve the problems of limited shape of molded products, brittle shell, unsatisfactory impact strength, etc.

Inactive Publication Date: 2005-08-24
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of the inorganic light diffuser weakens the impact strength of the composition, resulting in complex shapes or large shells and making the shells brittle
[0013] The problems of conventional methods can be summarized as follows: (1) the use of adding inorganic fillers to polypropylene-based matrix resins as a light diffuser can increase haze, but deteriorate mechanical properties such as high light transmittance and impact strength; and (2) ) using cross-linked styrene beads which are organic cross-linked transparent polymeric materials as a light diffuser to improve the above problems, and using titanium dioxide to increase brightness can lead to unsatisfactory improvements in light transmittance and mechanical properties such as impact strength, still Causes the possibility of dust pickup due to static electricity, and deteriorates the impact strength to limit the shape of molded products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Based on 100 parts by weight of amorphous PETG resin, 1.5 parts by weight of bead-type light-diffusing resin (MPB-X10 provided by Kolon Industries Inc.) with an average particle diameter of 10 μm TM, comprising 95 mol% of PMMA and 5 mol% of polystyrene), 1.0 parts by weight of sodium dodecylsulfonate as an antistatic agent and 0.005 parts by weight of bis-(styryl) bis-(styrene-based) as a fluorescent whitening agent Benzene was fed into the hopper of a twin-screw extruder equipped with a vacuum belt by means of a doser, and uniformly dispersed by melt mixing. The mixed melt was cooled by a water bath, and cut into small spherical light-diffusing resins.

[0033] The pellets thus obtained were dried in a dehumidifying drier for at least 4 hours, extruded into a sheet with a single screw extruder, and passed through calender rolls into a 1.5 mm thick sheet.

[0034] Then, the sheets thus obtained were analyzed for haze and light transmittance according to ASTM D 1003, fo...

Embodiment 2

[0036] The procedure was carried out in the same manner as described in Example 1, except that amorphous polyethylene terephthalate (amorphous PET) was used instead of the amorphous PETG resin, to prepare a light-diffusing resin and a sheet.

[0037] The sheets thus obtained were analyzed for haze and light transmittance according to ASTM D 1003, for surface resistance according to ASTM D 257 and for impact strength according to ASTM D 256. The results are shown in Table 2.

Embodiment 3 to 7

[0039] In addition to using the polyester-based resins listed in Table 1 and a bead-type light-diffusing resin containing PMMA as a light-diffusing agent (MPB-X12 provided by Kolon Industries Inc. TM ), the procedure was carried out in the same manner as described in Example 1 to prepare light-diffusing resins and sheets.

[0040] The sheets thus obtained were analyzed for haze and light transmittance according to ASTM D 1003, for surface resistance according to ASTM D 257 and for impact strength according to ASTM D 256. The results are shown in Table 2.

[0041] polyester

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Abstract

Disclosed is a light diffusion resin composition that is prepared by adding a bead type light diffusion resin comprised of PMMA as a light diffuser to a polyester resin according to the present invention. The light diffusion resin composition can be molded into a cover for lightings or sign boards by a processing method such as injection molding, extrusion molding or compression molding, so that the cover has a high haze and high light transmittance, making lamps of the lightings or the sign boards, interior lamps of buildings and contents invisible with a high light transmittance and hence a high level of luminance, provides a low surface resistance to prevent dust-attraction caused by static electricity, and minimizes a deterioration of impact strength, thereby allowing the manufacture of the cover irrespective of size.

Description

technical field [0001] The present invention relates to a light-diffusing resin composition. More specifically, the present invention relates to a light-diffusing resin composition which can be easily molded into a casing of lighting equipment or a signboard by a processing method such as injection molding, extrusion molding, or compression molding, and when When used in the housing of lighting equipment or signs, it provides high turbidity and high light transmittance to make the contents inside invisible through relatively high brightness and low surface resistance, and it generates almost no static electricity, thus avoiding dust absorption. Background technique [0002] In general, high opacity and high light transmission are the necessary properties of the base material for the housing of indoor and outdoor lighting or signage. [0003] Turbidity is one of the important characteristics that must be considered in the housing for light use, because with the increase in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L33/12G02B1/04C08K5/00C08L67/02
CPCC08K5/3475C08L33/12C08K5/0075C08K5/0041C08K5/1545C08K5/3492C08L67/02C08K5/01C08L2666/04
Inventor 姜忠锡金大镇金泳范
Owner KOLON IND INC
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