CN104448651A - Heat-resistant high-transparency photodiffusion PMMA (polymethyl methacrylate) material and preparation method thereof - Google Patents
Heat-resistant high-transparency photodiffusion PMMA (polymethyl methacrylate) material and preparation method thereof Download PDFInfo
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- CN104448651A CN104448651A CN201410756346.4A CN201410756346A CN104448651A CN 104448651 A CN104448651 A CN 104448651A CN 201410756346 A CN201410756346 A CN 201410756346A CN 104448651 A CN104448651 A CN 104448651A
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Abstract
The invention discloses a heat-resistant high-transparency photodiffusion PMMA (polymethyl methacrylate) material and a preparation method thereof. The PMMA material comprises the following raw materials in percentage by weight: 89-99% of PMMA, 1-5% of heat-resistant resin, 0.5-5% of a photodiffusion agent, 0.1-1% of an antioxidant, 0.1-0.8% of a lubricant and 0.01-0.5% of a fluorescent whitening agent. The preparation method of the PMMA material, disclosed by the invention, comprises the following steps: weighing the materials in a raw material formula according to the weight proportions; baking and mixing the materials; putting the mixture into a feed hopper of a double-screw extruder; and performing double-screw high-speed shearing, extrusion, bracing, cooling and granulation. The photodiffusion PMMA material prepared by the method disclosed by the invention is excellent in heat resistance, good in photodiffusion effect, high in light transmittance and mild in light, achieves an effect of being pervious to light but not transparent, has mild and uniform light, and is suitable for LED lamps, down lamps, transmission type screens, decorative lighting billboards and the like in the field of illumination.
Description
Technical field
The present invention relates to polymeric material field, particularly relate to a kind of heat-resisting high transparency light diffusion PMMA material and preparation method thereof.
Background technology
Photodiffusion material refers to the material that a line source can be changed into line area source.Generally prepare by the light diffusion particle of specific refraction different from base material is dispersed in transparent substrate.Be used for the backlight source material of liquid-crystal display in early days, be also called light-scattering material or diffusion material, photodiffusion material being used for light emitting diode LED lighting is a new opplication field of opening up in recent years.LED illumination comparatively liquid crystal backlight is stronger, and fill light linearly can be higher, and the photodiffusion material for LED illumination must reduce light loss while diffusion light as far as possible, and has good toughness.Organic smooth diffusion particle and the PC of adopting prepares photodiffusion material by blending method more at present, but the transmittance of PC only has 88-89%, therefore will prepare the photodiffusion material of more high transmission rate, adopts PC cannot reach as matrix resin.
PMMA is macromolecule transparent material the most excellent at present, and visible light transmissivity reaches 92-94%, also higher than the transmittance of glass, is suitable for the photodiffusion material preparing high transmission rate.And there is higher surface hardness, have good processing characteristics, quality is light.
But the heat resisting temperature of existing PMMA material only has 90 degree, be applied in LED illumination product, after long-time, high temperature, intense light irradiation work, easily occur the phenomenon of jaundice, finally cause transmittance to decline.
Summary of the invention
The object of the invention is to the deficiency overcoming the existence of above-mentioned prior art, provide a kind of light to spread PMMA material, its fine heat-resisting performance, light diffusion effect are good and transmittance is high.
Meanwhile, present invention also offers a kind of preparation method of heat-resisting high transparency light diffusion PMMA material.
For achieving the above object, the present invention is achieved by the following technical solutions:
A kind of heat-resisting high transparency light diffusion PMMA material, is characterized in that basic recipe and weight percent consist of:
Preferably, described PMMA is high transparency PMMA, and transmittance is 92%-94%.
Preferably, described heat stable resin is powdery polyphenylene oxide, and particle diameter is 1-10 micron.
Preferably, described light diffusing agent is organic type light diffusing agent, and particle diameter is 0.2-5 micron.
Preferably, described organic type light diffusing agent is any one or several mixture in silicone resin type, styrene resin epoxy-type and acrylate resin type.
Preferably, described oxidation inhibitor is primary antioxidant 1010, any one and auxiliary antioxidant 168 in primary antioxidant 1076, primary antioxidant 1098 mix in the ratio of 1:1-1:4.
Preferably, described lubricant is any one or several mixture in polyvalent alcohol stearate, Zinic stearas and erucicamide.
Preferably, described white dyes is oxazole class whitening agent.
Above-mentioned heat-resisting high transparency light diffusion PMMA material, its processing step prepared is as follows:
(1) material in composition of raw materials is taken by weight ratio.
(2) dry material, polyphenylene oxide at 120 DEG C of dry 2-3h, PMMA at 80 DEG C of dry 2-3h.
(3) PMMA and polyphenylene oxide are added in mixer be mixed together 5 ~ 10 minutes, then the material of remainder is added in mixer and be mixed together 30 ~ 60 minutes, discharging.
(4) mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, cooling, granulation.One district's temperature of setting twin screw extruder is 180 ~ 200 DEG C, two district's temperature are 190 ~ 210 DEG C, three district's temperature are 200 ~ 220 DEG C, four district's temperature are 210 ~ 230 DEG C, five district's temperature are 210 ~ 220 DEG C, head temperature is 200 ~ 210 DEG C, and rate of feeding is 20 ~ 200 revs/min, and screw speed is 50 ~ 500 revs/min.
Starting components of the present invention is that base material coordinates heat stable resin, light diffusing agent, oxidation inhibitor, lubricant and white dyes with PMMA.Compared with prior art, add heat stable resin, improve the resistance toheat of PMMA material, be applied in illuminating product, long term high temperature, intense light irradiation also there will not be the phenomenon of jaundice after using, transmittance is stablized.Add white dyes, effectively improve the outward appearance of obtained PMMA material, improve the whiteness of PMMA material.With organic type light diffusing agent synergistic, make the light diffusion PMMA material obtained, light diffusion effect is good, and transmittance is high, while covering luminous source and dazzling light source, whole resin can be made to send again softer, attractive in appearance, graceful light, reaches printing opacity opaque, possess soft even light, be applicable to LED in lighting field, Down lamp, rear projection screen and lamp decoration billboard etc.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
A kind of heat-resisting high transparency light diffusion PMMA material and preparation method thereof.The weight percent composition of raw material:
The processing step of preparation is as follows:
(1) material in composition of raw materials is taken by weight ratio.
(2) dry material, polyphenylene oxide at 120 DEG C of dry 2-3h, PMMA at 80 DEG C of dry 2-3h.
(3) PMMA and polyphenylene oxide are added in mixer be mixed together 5 ~ 10 minutes, then the material of remainder is added in mixer and be mixed together 30 ~ 60 minutes, discharging.
(4) mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, cooling, granulation.One district's temperature of setting twin screw extruder is 180 ~ 200 DEG C, two district's temperature are 190 ~ 210 DEG C, three district's temperature are 200 ~ 220 DEG C, four district's temperature are 210 ~ 230 DEG C, five district's temperature are 210 ~ 220 DEG C, head temperature is 200 ~ 210 DEG C, and rate of feeding is 20 ~ 200 revs/min, and screw speed is 50 ~ 500 revs/min.
Light diffusion PMMA material prepared by the present invention, resistance toheat is high, and light diffusion effect is good, and transmittance is high, and light is soft, reaches printing opacity opaque, possesses soft even light.
Embodiment 1
Raw material is taken by following weight percent content:
The preparation technology of embodiment 1: get feed composition by above-mentioned each proportioning respectively.Added by polyphenylene oxide in materal drier, 120 DEG C of dry 3h, add PMMA in materal drier, 80 DEG C of dry 3h.PMMA after drying and polyphenylene oxide are added in mixer and is mixed together 10 minutes, then the material of remainder is added in mixer and be mixed together 60 minutes, discharging.Mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, granulation.One district's temperature of setting twin screw extruder is 200 DEG C, and two district's temperature are 210 DEG C, and three district's temperature are 220 DEG C, and four district's temperature are 230 DEG C, and five district's temperature are 220 DEG C, and head temperature is 210 DEG C, and rate of feeding is 100 revs/min, and screw speed is 300 revs/min.
Embodiment 2
Raw material is taken by following weight percent content:
The preparation technology of embodiment 2: get feed composition by above-mentioned each proportioning respectively.Added by polyphenylene oxide in materal drier, 120 DEG C of dry 2.5h, add PMMA in materal drier, 80 DEG C of dry 2.5h.PMMA after drying and polyphenylene oxide are added in mixer and is mixed together 5 minutes, then the material of remainder is added in mixer and be mixed together 30 minutes, discharging.Mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, granulation.One district's temperature of setting twin screw extruder is 180 DEG C, and two district's temperature are 190 DEG C, and three district's temperature are 200 DEG C, and four district's temperature are 210 DEG C, and five district's temperature are 210 DEG C, and head temperature is 200 DEG C, and rate of feeding is 50 revs/min, and screw speed is 100 revs/min.
Embodiment 3
Raw material is taken by following weight percent content:
The preparation technology of embodiment 3: get feed composition by above-mentioned each proportioning respectively.Added by polyphenylene oxide in materal drier, 120 DEG C of dry 2h, add PMMA in materal drier, 80 DEG C of dry 2h.PMMA after drying and polyphenylene oxide are added in mixer and is mixed together 5 minutes, then the material of remainder is added in mixer and be mixed together 60 minutes, discharging.Mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, granulation.One district's temperature of setting twin screw extruder is 190 DEG C, and two district's temperature are 200 DEG C, and three district's temperature are 210 DEG C, and four district's temperature are 220 DEG C, and five district's temperature are 220 DEG C, and head temperature is 200 DEG C, and rate of feeding is 150 revs/min, and screw speed is 300 revs/min.
Embodiment 4
Raw material is taken by following weight percent content:
The preparation technology of embodiment 4: get feed composition by above-mentioned each proportioning respectively.Added by polyphenylene oxide in materal drier, 120 DEG C of dry 3h, add PMMA in materal drier, 80 DEG C of dry 2h.PMMA after drying and polyphenylene oxide are added in mixer and is mixed together 5 minutes, then the material of remainder is added in mixer and be mixed together 40 minutes, discharging.Mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, granulation.One district's temperature of setting twin screw extruder is 200 DEG C, and two district's temperature are 210 DEG C, and three district's temperature are 220 DEG C, and four district's temperature are 230 DEG C, and five district's temperature are 210 DEG C, and head temperature is 200 DEG C, and rate of feeding is 100 revs/min, and screw speed is 200 revs/min.
Embodiment 5
Raw material is taken by following weight percent content:
The preparation technology of embodiment 5: get feed composition by above-mentioned each proportioning respectively.Added by polyphenylene oxide in materal drier, 120 DEG C of dry 3h, add PMMA in materal drier, 80 DEG C of dry 3h.PMMA after drying and polyphenylene oxide are added in mixer and is mixed together 5 minutes, then the material of remainder is added in mixer and be mixed together 40 minutes, discharging.Mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, granulation.One district's temperature of setting twin screw extruder is 180 DEG C, and two district's temperature are 200 DEG C, and three district's temperature are 220 DEG C, and four district's temperature are 230 DEG C, and five district's temperature are 210 DEG C, and head temperature is 200 DEG C, and rate of feeding is 500 revs/min, and screw speed is 200 revs/min.
Embodiment 6
Raw material is taken by following weight percent content:
The preparation technology of embodiment 6: get feed composition by above-mentioned each proportioning respectively.Added by polyphenylene oxide in materal drier, 120 DEG C of dry 2h, add PMMA in materal drier, 80 DEG C of dry 3h.PMMA after drying and polyphenylene oxide are added in mixer and is mixed together 5 minutes, then the material of remainder is added in mixer and be mixed together 60 minutes, discharging.Mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, granulation.One district's temperature of setting twin screw extruder is 180 DEG C, and two district's temperature are 190 DEG C, and three district's temperature are 200 DEG C, and four district's temperature are 220 DEG C, and five district's temperature are 210 DEG C, and head temperature is 200 DEG C, and rate of feeding is 100 revs/min, and screw speed is 300 revs/min.
Performance test
Transmittance test and mist degree test adopt transmittance mist degree determinator (being produced by Shanghai Precision Scientific Apparatus Co., Ltd) according to standards of American society of test materials ASTM D1003-61 (1997), detect the light transmission of light obtained in embodiment 1-6 diffusion PMMA material and light diffusing, test sample plate thickness is 2mm.The heat-drawn wire of Vicat softening point tester to light diffusion PMMA material is adopted to detect.Shown in test result sees the following form:
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (9)
1. a heat-resisting high transparency light diffusion PMMA material, is characterized in that basic recipe and weight percent consist of:
PMMA 89~99%
Heat stable resin 1 ~ 5%
Light diffusing agent 0.5 ~ 5%
Oxidation inhibitor 0.1 ~ 1%
Lubricant 0.1 ~ 0.8%
White dyes 0.01 ~ 0.5%.
2. heat-resisting high transparency light diffusion PMMA material according to claim 1, it is characterized in that: described PMMA is high transparency PMMA, transmittance is 92%-94%.
3. heat-resisting high transparency light diffusion PMMA material according to claim 1, it is characterized in that: described heat stable resin is powdery polyphenylene oxide, particle diameter is 1-10 micron.
4. heat-resisting high transparency light diffusion PMMA material according to claim 1, it is characterized in that: described light diffusing agent is organic type light diffusing agent, particle diameter is 0.2-5 micron.
5. the heat-resisting high transparency light diffusion PMMA material according to claim 1 or 4, is characterized in that: described organic type light diffusing agent is any one or several mixtures in silicone resin type, styrene resin epoxy-type and acrylate resin type.
6. heat-resisting high transparency light diffusion PMMA material according to claim 1, is characterized in that: described oxidation inhibitor is primary antioxidant 1010, any one and auxiliary antioxidant 168 in primary antioxidant 1076, primary antioxidant 1098 mixes in the ratio of 1:1-1:4.
7. heat-resisting high transparency light diffusion PMMA material according to claim 1, is characterized in that: described lubricant is any one or several mixtures in polyvalent alcohol stearate, Zinic stearas and erucicamide.
8. heat-resisting high transparency light diffusion PMMA material according to claim 1, is characterized in that: described white dyes is oxazole class whitening agent.
9. the preparation method of the heat-resisting high transparency light diffusion PMMA material according to any one of claim 1 ~ 8, is characterized in that the processing step prepared is as follows:
(1) material in composition of raw materials is taken by weight ratio;
(2) dry material, polyphenylene oxide at 120 DEG C of dry 2-3h, PMMA at 80 DEG C of dry 2-3h;
(3) PMMA and polyphenylene oxide are added in mixer be mixed together 5 ~ 10 minutes, then the material of remainder is added in mixer and be mixed together 30 ~ 60 minutes, discharging;
(4) mixed material is sent in twin screw extruder loading hopper, through twin screw high speed shear, extrude, tie rod, cooling, granulation; One district's temperature of setting twin screw extruder is 180 ~ 200 DEG C, two district's temperature are 190 ~ 210 DEG C, three district's temperature are 200 ~ 220 DEG C, four district's temperature are 210 ~ 230 DEG C, five district's temperature are 210 ~ 220 DEG C, head temperature is 200 ~ 210 DEG C, and rate of feeding is 20 ~ 200 revs/min, and screw speed is 50 ~ 500 revs/min.
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Cited By (8)
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| CN105924873A (en) * | 2016-07-04 | 2016-09-07 | 刘雷 | Special high-refractivity antifogging organic glass material for LED (light-emitting diode) lenses and preparation method thereof |
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| CN107474462A (en) * | 2017-09-08 | 2017-12-15 | 太仓市华鼎塑料有限公司 | A kind of automobile uses up diffusion PMMA composites and preparation method thereof |
| CN110256796A (en) * | 2019-07-18 | 2019-09-20 | 广东一龙新材料科技有限公司 | Reflective PMMA master batch of a kind of dedicated height of traffic and preparation method thereof |
| CN110256796B (en) * | 2019-07-18 | 2021-06-29 | 广东一龙新材料科技有限公司 | Special high-light-reflection PMMA master batch for traffic and preparation method thereof |
| CN115109372A (en) * | 2021-08-03 | 2022-09-27 | 上海恩左实业发展有限公司 | High-performance acrylic sheet and preparation method thereof |
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Application publication date: 20150325 |