CN102372914B - Polycarbonate composition having light diffusion characteristics and preparation method thereof - Google Patents
Polycarbonate composition having light diffusion characteristics and preparation method thereof Download PDFInfo
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- CN102372914B CN102372914B CN2010102527533A CN201010252753A CN102372914B CN 102372914 B CN102372914 B CN 102372914B CN 2010102527533 A CN2010102527533 A CN 2010102527533A CN 201010252753 A CN201010252753 A CN 201010252753A CN 102372914 B CN102372914 B CN 102372914B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
Abstract
The invention relates to a polycarbonate composition having light diffusion characteristics and a preparation method thereof. The composition comprises the following ingredients: 90-99.9 weight portions of polycarbonate and 0.1-10 weight portions of light diffusant, prepared by the following steps: uniformly mixing polycarbonate and light diffusant with stirring through a high speed mixer to obtain a mixture, sending the mixture in a double screw extruder through a primary feeding pipe, carrying out extrusion with controlling the length-diameter ratio to 20-90:1, the screw temperature of 200-350 DEG C and the screw rotating speed of 200-700 rpm and pelletizing. Compared with the prior art, the composition prepared by using the coreshell structure of coating organic silicone resin on PMMA-GMA as the light diffusant has the advantages of high light transmittance, highlight diffusion characteristic, no glare, and easy preparation and the like, and can be used in film, sheet material and injection molding.
Description
Technical field
The present invention relates to a kind of polymeric composition and preparation method thereof, especially relate to a kind of polycarbonate compositions that possesses the light diffusion property and preparation method thereof.
Background technology
The internal characteristics of LED has: 1, volume is little, and LED is that a very little wafer is encapsulated in epoxy resin the inside basically, thus its very little, very light; 2, current consumption is low, and the LED power consumption is quite low, and in general the operating voltage of LED is 2-3.6V; Working current is 0.02-0.03A.In other words: the electric energy that it consumes is no more than 0.1W.3, long service life, under appropriate electric current and voltage, can reach 100,000 hours the work-ing life of LED; 4, high brightness, low in calories, LED uses the chemiluminescence technology, and thermal value is more much lower than ordinary luminaire; 5, environmental protection, LED is made by nontoxic material, and containing mercury unlike luminescent lamp can pollute, and simultaneously LED also can recycling; 6, sturdy and durable, LED is encapsulated in inside epoxy resin completely, and it is all firmer than bulb and fluorescent tube bulb.Also there is no loosening part in lamp body, it is non-damageable that these characteristics make LED can be described as.These advantages have determined that it is that optimal light source goes to replace traditional light source, has purposes widely at light-emitting diode display, illumination etc.
But the obvious inferior position that LED exists is pointolite for it, exists the pointolite of high brightness can have the problems such as dazzling, that illuminated area is limited on the Application Areass such as illumination, needs particular design or material that it is become area source and just can use.Traditional solution is: 1, on original transparent glass or resin, increase the frosted design effect, but this design meeting seriously reduces the light penetration of lampshade, makes the characteristics of LED high brightness to manifest; 2, the design that increases prism on the Transparent lamp shade basis to be reaching the effect (US566722) of light diffusion, but should design light diffusion effect limited, still can see dazzling LED lamp pearl, and this design still can reduce light printing opacity flow rate, affects efficiency lf illumination; 3, add color on original lampshade basis and cover, the method light diffusion effect is not obvious, and has a strong impact on transmittance.The polycarbonate material that possesses the light diffusion property becomes the Latest Materials solution of LED lampshade.
The thermoplastic material that JP378106 discloses two kinds of different refractive index of a kind of use is prepared into the film of sea-island structure, possess high transmission rate and high astigmatic characteristic, but its preparation starting material is complicated, and only is confined to film article.CN1249461C discloses a kind of inorganic particulate that uses as the method for light dispersive medium spray painting transparent film, but repeats the method, and its transmittance descends obviously.JP242862 discloses a kind of ring-type polyolefin resin that uses as the material of light diffusing agent preparation, and it possesses high transmission rate and high astigmatic characteristic, but ring-type polyolefin resin preparation process is complicated and prepare strict.JP168904 discloses a kind of method of avoiding material birefringence, but its transmittance descends obviously.
Summary of the invention
Purpose of the present invention be exactly provide a kind of in order to overcome the defective that above-mentioned prior art exists and possess high transmission rate, high light diffusion property, without outstanding light, be simple and easy to prepare and applicable to polycarbonate compositions of the characteristics such as film, sheet material and moulding and preparation method thereof.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of polycarbonate compositions that possesses the light diffusion property is characterized in that, said composition comprises following component and weight part content:
Polycarbonate 90～99.9;
Light diffusing agent 0.1～10.
The matter average molecular weight of described polycarbonate is that under 10000～200000,300 ℃, the test melting index is 1～85g/10min.
Preferred 3～the 70g/10min of test melting index under preferred 15000～80000,300 ℃ of the matter average molecular weight of described polycarbonate.
Described light diffusing agent is the multipolymer of silicone resin grafting polymethyl acrylate-glycidyl ester (PMMA-GMA), this light diffusing agent is the nucleocapsid structure of the silicone resin of PMMA-GMA coating, the silicone resin grafted functional group can be one or both in methyl or phenyl, the matter average molecular weight of PMMA-GMA resin is 10000～100000, and the matter average molecular weight of silicone resin is 20000～200000.
The refractive index of described light diffusing agent is 1.40～1.59, and particle diameter is 1～10 μ m, the weight ratio of silicone resin and shell PMMA-GMA resin 30: 70～90: 10, and in the PMMA-GMA resin, GMA content is 1～15wt%.
The refractive index of described light diffusing agent is preferred 1.42～1.57, preferred 1～5 μ m of particle diameter, preferred 50: 50～80: 20 of the weight ratio of silicone resin and shell PMMA-GMA resin, the preferred 5～10wt% of GMA content in the PMMA-GMA resin.
A kind of preparation method who possesses the polycarbonate compositions of light diffusion property is characterized in that, the method comprises the following steps:
(1) prepare raw material according to following component and weight part content:
Polycarbonate 90～99.9,
Light diffusing agent 0.1～10;
(2) polycarbonate and light diffusing agent are mixed through high-speed mixer, obtain mixture, send into twin screw extruder by main feeding, controlling the twin screw extruder length-to-diameter ratio is 20～90: 1, extruder temperature is 200～350 ℃, screw speed is that 200～700rpm extrudes pelletizing, namely obtains product.
Described twin screw extruder length-to-diameter ratio preferred 32～45: 1, preferred 220～320 ℃ of extruder temperature, the preferred 250～550rpm of screw speed.
Can also add additive in described twin screw extruder, the add-on of additive is 0.1～0.3wt% of mixture.
Described additive comprises UV stablizer, thermo-stabilizer, antioxidant, releasing agent or pigment.
Described additive comprises UV stablizer, thermo-stabilizer, antioxidant, releasing agent or pigment.
Compared with prior art, the present invention coats composition that the nucleocapsid structure of silicone resin prepares as light diffusing agent and possesses high transmission rate, high light diffusion property by being used in PMMA-GMA, without outstanding light, be simple and easy to preparation and applicable to characteristics such as film, sheet material and mouldings, can be applicable to field of liquid crystal light diffusing sheet, optical lens, light guiding plate, light diffusing sheet optical element, street lamp shade or vehicle with and the instead of glass used of building materials etc.
Embodiment
The present invention is described in detail below in conjunction with specific embodiment.
Embodiment 1～6
Adopt following raw material:
PC-1：LG-DOW?Calibre?200-10；
PC-2：LG-DOW?Calibre?201-30；
L-1:BaSO
4, (Sachtleben, particle diameter are 4 μ m, and refraction coefficient is 1.64);
L-2:EXL5136, ACR class light diffusing agent, (ROHMHAAS, particle diameter are 5 μ m, and refraction coefficient is 1.54);
L-3: organosilicon-PMMA-GMA light diffusing agent, (liter of Shanghai day; Particle diameter is 2.5 μ m, and refractive index is 1.54);
Additive: IG-1010: IG-168 is the mixture of 2: 3.
Formula forms as shown in table 1:
Table 1
Polycarbonate and light diffusing agent are mixed through high-speed mixer, obtain mixture, send into twin screw extruder by main feeding, add again additive, controlling the twin screw extruder length-to-diameter ratio is 32: 1, extruder temperature is 220 ℃, and screw speed is that 250rpm extrudes pelletizing, namely obtains product.
Comparative Examples 1～4
Raw materials used identical with embodiment 1～6, it specifically fills a prescription as shown in table 2.
Table 2
Polycarbonate and light diffusing agent are mixed through high-speed mixer, obtain mixture, send into twin screw extruder by main feeding, add again additive, controlling the twin screw extruder length-to-diameter ratio is 32: 1, extruder temperature is 220 ℃, and screw speed is that 250rpm extrudes pelletizing, namely obtains comparative sample.
Embodiment 1～6 and Comparative Examples 1～4 are prepared product carry out following detection, detected result is as shown in table 3.
(1) the material transmittance is estimated
Be 300 ℃ at barrel zone temperature, die temperature is 80 ℃ of cold cycling, uses center line average roughness to be high mirror surface mould injection moulding 10 * 10 * 1mm sheet material of 1.0nm.According to ASTM D1003 standard, use HR-100 test material transmittance.
(2) the material mist degree is estimated
According to ASTM D1003 standard, use the mist degree of HR-100 test 10 * 10 * 1mm sheet material.
(3) the material light diffusing is estimated
10 * 10 * 1mm is placed on 4.5W LED 1cm place, is observing the light diffusion effect over against the light source place, light is even, is ◎ without speck; Light is even, and it is zero that slight speck is arranged; Light inhomogeneous and have obvious speck for *.
Table 3
Embodiment 7
A kind of preparation method who possesses the polycarbonate compositions of light diffusion property, the method comprises the following steps:
(1) prepare raw material according to following component and weight part content:
with the 90kg polycarbonate, the 10kg light diffusing agent is as raw material, wherein the matter average molecular weight of polycarbonate is 10000, under 300 ℃, the test melting index is 1g/10min, light diffusing agent is the multipolymer of silicone resin grafting polymethyl acrylate-glycidyl ester (PMMA-GMA), this light diffusing agent is the nucleocapsid structure of the silicone resin of PMMA-GMA coating, the silicone resin grafted functional group is methyl, the matter average molecular weight of PMMA-GMA resin is 10000, the matter average molecular weight of silicone resin is 20000, the refractive index of light diffusing agent is 1.4, particle diameter is 1 μ m, the weight ratio of silicone resin and shell PMMA-GMA resin 30: 70, GMA content is 1wt%.
(2) polycarbonate and light diffusing agent are mixed through high-speed mixer, obtain mixture, send into twin screw extruder by main feeding, controlling the twin screw extruder length-to-diameter ratio is 20: 1, extruder temperature is 200 ℃, and screw speed is that 200rpm extrudes pelletizing, namely obtains product.
Embodiment 8
A kind of preparation method who possesses the polycarbonate compositions of light diffusion property, the method comprises the following steps:
(1) prepare raw material according to following component and weight part content:
with the 92kg polycarbonate, the 8kg light diffusing agent is as raw material, wherein the matter average molecular weight of polycarbonate is 15000, under 300 ℃, the test melting index is 3g/10min, light diffusing agent is the multipolymer of silicone resin grafting polymethyl acrylate-glycidyl ester (PMMA-GMA), this light diffusing agent is the nucleocapsid structure of the silicone resin of PMMA-GMA coating, the silicone resin grafted functional group is methyl, the matter average molecular weight of PMMA-GMA resin is 20000, the matter average molecular weight of silicone resin is 40000, the refractive index of light diffusing agent is 1.42, particle diameter is 3 μ m, the weight ratio of silicone resin and shell PMMA-GMA resin 50: 50, GMA content is 5wt%.
(2) polycarbonate and light diffusing agent are mixed through high-speed mixer, obtain mixture, send into twin screw extruder by main feeding, add again UV stablizer benzophenone, add-on is the 0.1wt% of mixture, and controlling the twin screw extruder length-to-diameter ratio is 32: 1, and extruder temperature is 220 ℃, screw speed is that 250rpm extrudes pelletizing, namely obtains product.
Embodiment 9
A kind of preparation method who possesses the polycarbonate compositions of light diffusion property, the method comprises the following steps:
(1) prepare raw material according to following component and weight part content:
with the 95kg polycarbonate, the 5kg light diffusing agent is as raw material, wherein the matter average molecular weight of polycarbonate is 80000, under 300 ℃, the test melting index is 70g/10min, light diffusing agent is the multipolymer of silicone resin grafting polymethyl acrylate-glycidyl ester (PMMA-GMA), this light diffusing agent is the nucleocapsid structure of the silicone resin of PMMA-GMA coating, the silicone resin grafted functional group is phenyl, the matter average molecular weight of PMMA-GMA resin is 50000, the matter average molecular weight of silicone resin is 80000, the refractive index of light diffusing agent is 1.57, particle diameter is 5 μ m, the weight ratio of silicone resin and shell PMMA-GMA resin 80: 20, GMA content is 10wt%.
(2) polycarbonate and light diffusing agent are mixed through high-speed mixer, obtain mixture, send into twin screw extruder by main feeding, add again the thermo-stabilizer dibasic lead stearate, add-on is the 0.3wt% of mixture, and controlling the twin screw extruder length-to-diameter ratio is 45: 1, and extruder temperature is 320 ℃, screw speed is that 550rpm extrudes pelletizing, namely obtains product.
Embodiment 10
A kind of preparation method who possesses the polycarbonate compositions of light diffusion property, the method comprises the following steps:
(1) prepare raw material according to following component and weight part content:
with the 99.9kg polycarbonate, 0.1g light diffusing agent is as raw material, wherein the matter average molecular weight of polycarbonate is 200000, under 300 ℃, the test melting index is 85g/10min, light diffusing agent is the multipolymer of silicone resin grafting polymethyl acrylate-glycidyl ester (PMMA-GMA), this light diffusing agent is the nucleocapsid structure of the silicone resin of PMMA-GMA coating, the silicone resin grafted functional group is methyl and phenyl, the matter average molecular weight of PMMA-GMA resin is 100000, the matter average molecular weight of silicone resin is 200000, the refractive index of light diffusing agent is 1.59, particle diameter is 10 μ m, the weight ratio of silicone resin and shell PMMA-GMA resin 90: 10, GMA content is 15wt%.
(2) polycarbonate and light diffusing agent are mixed through high-speed mixer, obtain mixture, send into twin screw extruder by main feeding, add again red iron oxide, add-on is the 0.3wt% of mixture, and controlling the twin screw extruder length-to-diameter ratio is 90: 1, and extruder temperature is 350 ℃, screw speed is that 700rpm extrudes pelletizing, namely obtains product.
Above demonstration and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (8)
1. a polycarbonate compositions that possesses the light diffusion property, is characterized in that, said composition comprises following component and weight part content:
Polycarbonate 90～99.9;
Light diffusing agent 0.1～10;
described light diffusing agent is the multipolymer of silicone resin grafting polymethylmethacrylate-glycidyl ester (PMMA-GMA), this light diffusing agent is the nucleocapsid structure of the silicone resin of PMMA-GMA coating, the silicone resin grafted functional group can be one or both in methyl or phenyl, the matter average molecular weight of PMMA-GMA resin is 10000～100000, the matter average molecular weight of silicone resin is 20000～200000, the refractive index of light diffusing agent is 1.40～1.59, particle diameter is 1～10 μ m, the weight ratio 30:70 of silicone resin and shell PMMA-GMA resin～90:10, in the PMMA-GMA resin, GMA content is 1～15wt%.
2. a kind of polycarbonate compositions that possesses the light diffusion property according to claim 1, is characterized in that, the matter average molecular weight of described polycarbonate is that under 10000～200000,300 ℃, the test melting index is 1～85g/10min.
3. a kind of polycarbonate compositions that possesses the light diffusion property according to claim 1 and 2, is characterized in that, the preferred 3～70g/10min of test melting index under preferred 15000～80000,300 ℃ of the matter average molecular weight of described polycarbonate.
4. a kind of polycarbonate compositions that possesses the light diffusion property according to claim 1, it is characterized in that, the refractive index of described light diffusing agent preferred 1.42～1.57, preferred 1～5 μ m of particle diameter, preferred 50:50～the 80:20 of weight ratio of silicone resin and shell PMMA-GMA resin, the preferred 5～10wt% of GMA content in the PMMA-GMA resin.
5. a preparation method who possesses the polycarbonate compositions of light diffusion property as claimed in claim 1, is characterized in that, the method comprises the following steps:
(1) prepare raw material according to following component and weight part content:
Polycarbonate 90～99.9,
Light diffusing agent 0.1～10;
(2) polycarbonate and light diffusing agent are mixed through high-speed mixer, obtain mixture, send into twin screw extruder by main feeding, controlling the twin screw extruder length-to-diameter ratio is 20～90:1, extruder temperature is 200～350 ℃, screw speed is that 200～700rpm extrudes pelletizing, namely obtains product.
6. a kind of preparation method who possesses the polycarbonate compositions of light diffusion property according to claim 5, it is characterized in that, preferred 32～the 45:1 of described twin screw extruder length-to-diameter ratio, preferred 220～320 ℃ of extruder temperature, the preferred 250～550rpm of screw speed.
7. a kind of preparation method who possesses the polycarbonate compositions of light diffusion property according to claim 5, is characterized in that, can also add additive in described twin screw extruder, and the add-on of additive is 0.1～0.3wt% of mixture.
8. a kind of preparation method who possesses the polycarbonate compositions of light diffusion property according to claim 7, is characterized in that, described additive comprises UV stablizer, thermo-stabilizer, antioxidant, releasing agent or pigment.
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| CN102618006A (en) * | 2012-03-16 | 2012-08-01 | 汤德明 | Composite material and technology for converting blue light from LED into white light |
| CN104212151A (en) * | 2014-09-16 | 2014-12-17 | 成都欧盛光电科技有限公司 | Lens material and preparation method thereof |
| CN104504944A (en) * | 2014-12-16 | 2015-04-08 | 江西盛汇光学科技有限公司 | Polycarbonate light diffusion film for backlight displaying of mobile phone and preparation method of polycarbonate light diffusion film |
| JP2017110106A (en) * | 2015-12-16 | 2017-06-22 | 日本ポリエステル株式会社 | Light diffusive polycarbonate resin composition and light diffusing member using the same |
| CN109796732B (en) * | 2018-12-28 | 2020-11-17 | 汕头市贝斯特科技有限公司 | High-light-transmittance high-haze polyester diffusion master batch and preparation method thereof |
| CN113088058A (en) * | 2019-12-23 | 2021-07-09 | 中石化南京化工研究院有限公司 | Polycarbonate-based light diffusion material for automobile lamp shade and preparation method thereof |
| CN112980171B (en) * | 2021-02-24 | 2022-05-06 | 广东锦湖日丽高分子材料有限公司 | Edible oil-resistant high-impact-resistance heat-resistant polycarbonate material and preparation method thereof |
| CN115960450A (en) * | 2023-01-07 | 2023-04-14 | 南京聚隆科技股份有限公司 | Thin-wall antistatic flame-retardant light-diffusion PC material and preparation method thereof |
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| CN101611096A (en) * | 2006-12-25 | 2009-12-23 | 三菱丽阳株式会社 | Fluidity improver, aromatic polycarbonate resin composition and moulding product thereof |
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| CN101611096A (en) * | 2006-12-25 | 2009-12-23 | 三菱丽阳株式会社 | Fluidity improver, aromatic polycarbonate resin composition and moulding product thereof |
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