CN103554863A - LED lampshade material polycarbonate resin composition and preparation method thereof - Google Patents

LED lampshade material polycarbonate resin composition and preparation method thereof Download PDF

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Publication number
CN103554863A
CN103554863A CN201310459434.3A CN201310459434A CN103554863A CN 103554863 A CN103554863 A CN 103554863A CN 201310459434 A CN201310459434 A CN 201310459434A CN 103554863 A CN103554863 A CN 103554863A
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resin composition
district
carbonate resin
poly carbonate
lampshade material
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苏学明
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SHENZHEN NAIMING PHOTOELECTRICITY Co Ltd
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SHENZHEN NAIMING PHOTOELECTRICITY Co Ltd
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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
    • B29C48/03—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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones
    • 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
    • B29C2948/92704—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
    • B29C2948/92895—Barrel or housing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention relates to an LED lampshade material polycarbonate resin composition and a preparation method thereof. The composition comprises, by weight: 100 parts of polycarbonate, 1.5-3 parts of a light diffusing agent, 0.08-0.1 parts of a flame retardant, 0.1-0.2 parts of an antioxidant and 0.03-0.06 parts of a UV absorber. The components in the composition have good compatibility. With the synergetic effect of a light diffusion agent and an antioxidant, polycarbonate original molecular weight and intrinsic viscosity can be increased and recovered during a high-temperature processing forming process. The obtained polycarbonate resin composition has high transparency and good temperature resistance. The mechanical performances comprising impact strength, bending strength and tensile strength are better than those of traditional resin compositions. Light diffusion effects are good, and light transmittance is high. Also, the invention relates to a preparation method of the lampshade-use polycarbonate resin composition.

Description

Poly carbonate resin composition and preparation method thereof for LED lampshade material
Technical field
The present invention relates to polymeric material field, especially relate to poly carbonate resin composition and preparation method thereof for a kind of lampshade material.
Background technology
Traditional lampshade, comprise that indoor and outdoor use lampshade is all to adopt glass to make, development along with material industry, present lampshade particularly indoor lampshade is all the polycarbonate (Polycarbonate by muted color or micro-tool color conventionally, be called for short PC) as major ingredient manufacture, major cause is that PC has relatively high glass transformation temperature and outstanding transparency and the optical transmittance in visible-range.PC, as a kind of thermoplastic engineering plastic, has good physical and mechanical properties, and especially shock-resistance is excellent, and tensile strength, flexural strength, compressive strength are high; Creep properties is little, dimensional stabilizing; There is good thermotolerance and lower temperature resistance, in wide temperature range, there is stable mechanical property, dimensional stability, electrical property and flame retardant resistance, can be at-60～120 ℃ life-time service; Because molecular chain rigidity is large, resin melt viscosity is large; Water-intake rate is little, and shrinking percentage is little, and dimensional precision is high, good stability of the dimension, and banana is little; Stable to light, but ultraviolet resistance not, weathering resistance is better; Oil resistant, acidproof but not resistance to highly basic, oxidizing acid and amine, ketone; Be dissolved in chlorinated hydrocarbons and aromatic solvent, but in water, easily cause for a long time hydrolysis and cracking, shortcoming is poor because of fatigue resistance, easily produces stress cracking, and good solubility-resistence is poor, and wear resistance is not good enough.
Above-mentioned characteristic based on PC, when its materials'use as the especially indoor lampshade of manufacture lampshade, is necessary it to carry out modification, further to improve its transparence, temperature tolerance and mechanical property.
Summary of the invention
Based on this, be necessary poly carbonate resin composition and preparation method thereof for lampshade material of a kind of transparence, temperature tolerance and mechanical property excellence.
A material poly carbonate resin composition, comprises each components of following parts by weight:
Figure BDA0000390448050000011
Figure BDA0000390448050000021
Therein in an embodiment, described polycarbonate is powdery, granular or powdery and granular mixture.
In an embodiment, described light diffusing agent is polymethylmethacrylate therein.
In an embodiment, described polymethylmethacrylate is selected from least one in M-22ML, M-04ML, M-15, ECCOBOND DX-20, EP-3000, CN-801, EFKA-6225 and BYK-163 therein.
In an embodiment, described fire retardant is selected from least one in FR-1010, FR-3690, FR-2025 and FR-KSS therein.
Therein in an embodiment, described oxidation inhibitor is selected from 4, at least one in 4 '-thiobis (the 6-tertiary butyl-3-methylphenol), tris phosphite (2,4-di-tert-butyl-phenyl), four [β-(3,5 di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester.
Therein in an embodiment, described UV light absorber is selected from bisphenol a disalicylate, 2-hydroxyl-4 n-octyloxy-benzophenone, 2,4 dihydroxyl benzophenone and 2-(2 '-dihydroxyl-3 '-tertiary butyl-5 '-aminomethyl phenyl) at least one in-5-chlorobenzotriazole.
A preparation method for poly carbonate resin composition for lampshade material, comprises the steps:
According to following weight part, get each feed composition:
Figure BDA0000390448050000022
Each raw material stirring is mixed;
Each raw material after mixing is placed in to forcing machine and carries out extruding pelletization, forcing machine Nei Ge district extrusion temperature is: 280～300 ℃, 280～290 280～285 280～285 280～300 ℃Ji 5th district, ℃, 4th district, ℃, 3rd district, ℃, 2nd district, a district, obtains described lampshade material poly carbonate resin composition.
Above-mentioned polycarbonate resin composition for lampshades, in formula, the consistency of each component is better, the synergy of while light diffusing agent and oxidation inhibitor, in high temperature process moulding process, can increase and recover the original molecular weight of polycarbonate and limiting viscosity, resulting grade is high about poly carbonate resin composition transparency, heat resistance good, mechanical property comprises shock strength, bending strength and tensile strength are excellent than conventional resins composition.
Embodiment
Mainly in conjunction with specific embodiments polycarbonate resin composition for lampshades and preparation method thereof is described in further detail below.
The lampshade material poly carbonate resin composition of one embodiment, comprises each components of following parts by weight:
Figure BDA0000390448050000031
Further, the umber of light diffusing agent is selected 1.5 parts, 2 parts or 3 parts.The umber of fire retardant is selected 0.08 part, 0.09 part or 1 part.The umber of oxidation inhibitor is 0.1 part, 0.15 part or 0.2 part.The umber of UV light absorber is selected 0.02 part, 0.03 part or 0.06 part.
In the present embodiment, polycarbonate is powdery, granular or powdery and granular mixture.
Light diffusing agent is polymethylmethacrylate (PMMA), specifically be selected from least one in M-22ML, M-04ML, M-15, ECCOBOND DX-20, EP-3000, CN-801, EFKA-6225 and BYK-163, wherein, M-22ML, M-04ML and M-15 are German BASF chemical company production code member, main component is 2-(2H-benzo azido--2-yl)-4-(1,1,3,3-tetramethyl butyl) phenol; ECCOBOND DX-20 is U.S. Ai Masenkangming company production code member; EP-3000 is Taiwan day Ya Feitepu company production code member; CN-801, EFKA-6225 and BYK-163 are LG-DOW company production code member.
Fire retardant is selected from FR-1010(hexabromocyclododecane flame retardant, Minnesota Mining and Manufacturing Company's production code member), the sylvite fire retardant of FR-3690(perfluorocarbon, Sunpreme tM, French Elf Atochem company), FR-2025(perfluoro butyl potassium sulfonate, Minnesota Mining and Manufacturing Company's production code member) and FR-KSS(Sulfonates fire retardant, U.S. SLoss company production code member) at least one.
Oxidation inhibitor is selected from 4, at least one in 4 '-thiobis (the 6-tertiary butyl-3-methylphenol), tris phosphite (2,4-di-tert-butyl-phenyl), four [β-(3,5 di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester.
UV light absorber is selected from bisphenol a disalicylate, 2-hydroxyl-4 n-octyloxy-benzophenone, 2,4 dihydroxyl benzophenone and 2-(2 '-dihydroxyl-3 '-tertiary butyl-5 '-aminomethyl phenyl) at least one in-5-chlorobenzotriazole.
In addition, present embodiment also provides the preparation method of a kind of lampshade material with poly carbonate resin composition, comprises the steps:
According to following weight part, get each feed composition:
Figure BDA0000390448050000041
Each raw material stirring is mixed;
Each raw material after mixing is placed in to forcing machine and carries out extruding pelletization, forcing machine Nei Ge district extrusion temperature is: 280～300 ℃, 280～290 280～285 280～285 280～300 ℃Ji 5th district, ℃, 4th district, ℃, 3rd district, ℃, 2nd district, a district, obtains lampshade material poly carbonate resin composition.
This polycarbonate resin composition for lampshades, in formula, the consistency of each component is better, the synergy of while light diffusing agent and oxidation inhibitor, in high temperature process moulding process, can increase and recover the original molecular weight of polycarbonate and limiting viscosity, resulting grade is high about poly carbonate resin composition transparency, heat resistance good, mechanical property comprises shock strength, bending strength and tensile strength are excellent than conventional resins composition.
Be below specific embodiment part:
Embodiment 1
The component proportion of according to the form below is got the raw materials ready:
Polycarbonate 100 grams
Light diffusing agent M-15ML 1.5 gram
4,4 '-thiobis (the 6-tertiary butyl-3-methylphenol) 0.2 gram
2,4 dihydroxyl benzophenone 0.02 gram
[0039]?
Fire retardant FR-1010 0.1 gram
Pouring each component of getting material ready into stirrer stirs, and be placed in single screw extrusion machine, screw speed 42Hz, set temperature is: 280 ℃, 280 270 280 280 ℃, 5th district, ℃, 4th district, ℃, 3rd district, ℃, 2nd district, a district, extruding pelletization, obtains the polycarbonate resin composition for lampshades of embodiment 1.
The performance test results:
Performance Testing standard Unit Result
Melting index ASTMD1238 g/10min 10
Tensile strength ASTMD638 MPa 65
Unit elongation ASTMD638 % 192
Bending strength ASTMD790 MPa 98
Composite bending modulus ASTMD790 MPa 2348
Notched Izod impact strength (1/8 ") ASTMD256 Kg·cm/cm 112
Transparence ASTMD386 % 86
Thermal distorsion temperature ASTMD648 ℃ 125
Embodiment 2
The component proportion of according to the form below is got the raw materials ready:
Polycarbonate 100 grams
Light diffusing agent M-04ML 2 grams
4,4 '-thiobis (the 6-tertiary butyl-3-methylphenol) 0.15 gram
2,4 dihydroxyl benzophenone 0.06 gram
Fire-retardant FR-2 025 0.1 gram
Pouring each component of getting material ready into stirrer stirs, and be placed in single screw extrusion machine, screw speed 42Hz, set temperature is: 280 ℃, 280 270 280 280 ℃, 5th district, ℃, 4th district, ℃, 3rd district, ℃, 2nd district, a district, extruding pelletization, obtains the polycarbonate resin composition for lampshades of embodiment 2.
The performance test results:
Performance Method Unit Result
Melting index ASTMD1238 g/10min 13
Tensile strength ASTMD638 MPa 57
Unit elongation ASTMD638 % 154
Bending strength ASTMD790 MPa 91
Composite bending modulus ASTMD790 MPa 2198
Notched Izod impact strength (1/8 ") ASTMD256 Kg·cm/cm 102
Transparence ASTMD386 % 87.8
Thermal distorsion temperature ASTMD648 ℃ 128
Embodiment 3
The component proportion of according to the form below is got the raw materials ready:
Polycarbonate 100 grams
Light diffusing agent ECCOBOND DX-20 2 grams
4,4 '-thiobis (the 6-tertiary butyl-3-methylphenol) 0.15 gram
2,4 dihydroxyl benzophenone 0.03 gram
Fire retardant FR 3690 0.09 gram
Pouring each component of getting material ready into stirrer stirs, and be placed in single screw extrusion machine, screw speed 42Hz, set temperature is: 270 ℃, 260 260 270 270 ℃, 5th district, ℃, 4th district, ℃, 3rd district, ℃, 2nd district, a district, extruding pelletization, obtains the polycarbonate resin composition for lampshades of embodiment 3.
The performance test results:
Performance Method Unit Result
Melting index ASTMD1238 g/10min 11.8
Tensile strength ASTMD638 MPa 63
Unit elongation ASTMD638 % 133
[0055]?
Bending strength ASTMD790 MPa 72
Composite bending modulus ASTMD790 MPa 2964
Notched Izod impact strength (1/8 ") ASTMD256 Kg·cm/cm 87
Transparence ASTMD386 % 83
Thermal distorsion temperature ASTMD648 ℃ 125
Embodiment 4
The component proportion of according to the form below is got the raw materials ready:
Polycarbonate 100 grams
Light diffusing agent M-22ML 3 grams
4,4 '-thiobis (the 6-tertiary butyl-3-methylphenol) 0.1 gram
2,4 dihydroxyl benzophenone 0.06 gram
Fire retardant FR-KSS 0.08 gram
Pouring each component of getting material ready into stirrer stirs, and be placed in single screw extrusion machine, screw speed 42Hz, set temperature is: 290 ℃, 270 280 280 280 ℃, 5th district, ℃, 4th district, ℃, 3rd district, ℃, 2nd district, a district, extruding pelletization, obtains the polycarbonate resin composition for lampshades of embodiment 4.
The performance test results:
Performance Method Unit Result
Melting index ASTMD1238 g/10min 12
Tensile strength ASTMD638 MPa 65
Unit elongation ASTMD638 % 157
Bending strength ASTMD790 MPa 69
Composite bending modulus ASTMD790 MPa 2389
Notched Izod impact strength (1/8 ") ASTMD256 Kg·cm/cm 86
Transparence ASTMD386 % 88
[0062]?
Thermal distorsion temperature ASTMD648 ℃ 125
Be appreciated that, in other embodiments, oxidation inhibitor 4,4 '-thiobis (the 6-tertiary butyl-3-methylphenol) can adopt tris phosphite (2,4-di-tert-butyl-phenyl) or four [β-(3,5 di-tert-butyl-hydroxy phenyls) propionic acid] pentaerythritol ester substitutes, or the mixture replacing of any two or three in these three kinds of oxidation inhibitor; UV light absorber 2,4-dihydroxy benaophenonel can adopt bisphenol a disalicylate, 2-hydroxyl-4 n-octyloxy-benzophenone or 2-(2 '-dihydroxyl-3 '-tertiary butyl-5 '-aminomethyl phenyl)-5-chlorobenzotriazole substitutes, or any two kinds, three kinds or the mixture replacing of four kinds in these four kinds of UV light absorber.
Comparative example 1(does not add astigmatic stablizer)
The component proportion of according to the form below is got the raw materials ready:
Polycarbonate 100 grams
4,4 '-thiobis (the 6-tertiary butyl-3-methylphenol) 0.2 gram
Fire retardant FR 2025 0.08 gram
2,4 dihydroxyl benzophenone 0.02 gram
Pouring each component of getting material ready into stirrer stirs, and be placed in single screw extrusion machine, and screw speed 42Hz, set temperature is: 290 ℃, 270 280 280 290 ℃, 5th district, ℃, 4th district, ℃, 3rd district, ℃, 2nd district, a district, extruding pelletization, obtains the poly carbonate resin composition of comparative example 1.
The performance test results:
Performance Method Unit Result
Melting index ASTMD1238 g/10min 17
Tensile strength ASTMD638 MPa 53
Unit elongation ASTMD638 % 161
Bending strength ASTMD790 MPa 88
Composite bending modulus ASTMD790 MPa 2231
Notched Izod impact strength (1/8 ") ASTMD256 Kg·cm/cm 102
Transparence ASTMD386 % 92
[0070]?
Thermal distorsion temperature ASTMD648 ℃ 123
In the formula of comparative example 1, do not add light diffusing agent, the melting index of result poly carbonate resin composition raises, and the reductions such as shock strength, bending strength and tensile strength.
Comparative example 2(does not add oxidation inhibitor)
The component proportion of according to the form below is got the raw materials ready:
Polycarbonate 100 grams
Light diffusing agent M-22ML 3 grams
2,4 dihydroxyl benzophenone 0.03 gram
Fire-retardant FR-2 025 0.1 gram
Pouring each component of getting material ready into stirrer stirs, and be placed in single screw extrusion machine, and screw speed 42Hz, set temperature is: 280 ℃, 280 280 285 290 ℃, 5th district, ℃, 4th district, ℃, 3rd district, ℃, 2nd district, a district, extruding pelletization, obtains the poly carbonate resin composition of comparative example 2.
The performance test results:
Performance Method Unit Result
Melting index ASTMD1238 g/10min 11
Tensile strength ASTMD638 MPa 62
Unit elongation ASTMD638 % 153
Bending strength ASTMD790 MPa 97
Composite bending modulus ASTMD790 MPa 2345
Notched Izod impact strength (1/8 ") ASTMD256 Kg·cm/cm 102
Transparence ASTMD386 % 88.7
Thermal distorsion temperature ASTMD648 ℃ 128
Compare with embodiment 1 to 4, in the formula of comparative example 2, there is no oxidation inhibitor, the performances such as the melting index of polycarbonate and shock strength, bending strength and tensile strength are substantially constant, the astigmatic stablizer that above-mentioned use is described can be used as a kind of efficient oxidation inhibitor, the effect of oxidation inhibitor is only to prevent that plastics are subject to thermal-oxidative degradation in screw rod the inside, and the light diffusing agent of above-mentioned use not only can play the effect of oxidation inhibitor and plays the effect that astigmatism is stable simultaneously, there is significant advantage.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims (8)

1. a LED lampshade material poly carbonate resin composition, is characterized in that, comprises each component of following parts by weight:
Figure FDA0000390448040000011
2. lampshade material poly carbonate resin composition as claimed in claim 1, is characterized in that, described polycarbonate is powdery, granular or powdery and granular mixture.
3. LED lampshade material poly carbonate resin composition as claimed in claim 1, is characterized in that, described light diffusing agent is polymethylmethacrylate.
4. lampshade material poly carbonate resin composition as claimed in claim 3, it is characterized in that, described polymethylmethacrylate is selected from least one in M-22ML, M-04ML, M-15, ECCOBOND DX-20, EP-3000, CN-801, EFKA-6225 and BYK-163.
5. lampshade material poly carbonate resin composition as claimed in claim 1, is characterized in that, described fire retardant is selected from least one in FR-1010, FR-3690, FR-2025 and FR-KSS.
6. lampshade material poly carbonate resin composition as claimed in claim 1, it is characterized in that, described oxidation inhibitor is selected from 4,4 '-thiobis (the 6-tertiary butyl-3-methylphenol), tris phosphite (2,4-di-tert-butyl-phenyl), at least one in four [β-(3,5 di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester.
7. lampshade material poly carbonate resin composition as claimed in claim 1, it is characterized in that, described UV light absorber is selected from bisphenol a disalicylate, 2-hydroxyl-4 n-octyloxy-benzophenone, 2,4 dihydroxyl benzophenone and 2-(2 '-dihydroxyl-3 '-tertiary butyl-5 '-aminomethyl phenyl) at least one in-5-chlorobenzotriazole.
8. a preparation method for poly carbonate resin composition for LED lampshade material, is characterized in that, comprises the steps:
According to following weight part, get each feed composition:
Figure FDA0000390448040000012
Figure FDA0000390448040000021
Each raw material stirring is mixed;
Each raw material after mixing is placed in to forcing machine and carries out extruding pelletization, forcing machine Nei Ge district extrusion temperature is: 280～300 ℃, 280～290 280～285 280～285 280～300 ℃Ji 5th district, ℃, 4th district, ℃, 3rd district, ℃, 2nd district, a district, obtains described lampshade material poly carbonate resin composition.
CN201310459434.3A 2013-09-29 2013-09-29 LED lampshade material polycarbonate resin composition and preparation method thereof Pending CN103554863A (en)

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CN103897377A (en) * 2014-03-27 2014-07-02 广州合成材料研究院有限公司 Anti-aging photodiffusion PC (Poly Carbonate)-based resin and preparation method thereof
CN104497521A (en) * 2014-11-26 2015-04-08 苏州新区佳合塑胶有限公司 Composite material used for LED lampshades
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CN106280379A (en) * 2016-09-30 2017-01-04 福建华塑新材料有限公司 A kind of high transmission rate Merlon and preparation method thereof
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US11499010B2 (en) 2018-08-10 2022-11-15 Lg Chem, Ltd. Polycarbonate and preparation method thereof
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CN105694326B (en) * 2016-04-27 2018-10-19 广东东华光电科技有限公司 A kind of optical material and a kind of light guide plate
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US11499010B2 (en) 2018-08-10 2022-11-15 Lg Chem, Ltd. Polycarbonate and preparation method thereof
US11884777B2 (en) 2018-09-14 2024-01-30 Lg Chem, Ltd. Diol compound, polycarbonate, and preparation method of the same
CN109852024A (en) * 2018-12-19 2019-06-07 宁波浙铁大风化工有限公司 A kind of Novel foaming light diffusion PC material 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
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