CN103937186A - High light shading rate PC composite material and preparation method thereof - Google Patents
High light shading rate PC composite material and preparation method thereof Download PDFInfo
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Abstract
The present invention discloses a high light shading rate PC composite material, which comprises the following raw materials by weight: 56-70 parts of a PC resin, 15-20 parts of glass fibers, 10-15 parts of titanium dioxide powder, 4-6 parts of an ethylene-methyl acrylate copolymer, and 0.1-0.5 part of light shading powder, and further comprises, by weight, 0.4-1 part of an antioxidant, 0.2-0.5 part of an ultraviolet ray absorber, and 0.5-1 part of a lubricant. The PC composite material has advantages of high light shading rate, high rigidity, high toughness, excellent heat resistance, easy molding and the like, and can be widely used for production of LED displays, liquid crystal backlight parts, LCD displays and other electrical and electronic components having special requirements.
Description
Technical field
The present invention relates to technical field of polymer materials, relate in particular to a kind of high shading rate PC matrix material with advantages such as high rigidity, high tenacity and good heat resistances, the invention still further relates to the preparation method of this high shading rate PC matrix material.
Background technology
PC resin is polycarbonate resin, it is except having excellent mechanical property, electrical property, the transparency, dimensional stability and thermotolerance, the impact resistance of PC resin is good simultaneously, specific refractory power is high, good processability, it does not need to carry out any modification just can reach the fire-retardant requirement of UL94 V-2 level, therefore, PC resin can be widely used in the white cover material of light guiding plate, LED lamp holder, charger case or other electronic apparatus accessories.
Although PC material has many merits, but still can not meet the specific demand in electrical lighting field, such as the high opacifying property of some part requirement of light-emitting diode display and LCD display, so also need PC to carry out modification.Some shading PC materials have been there are on the market at present, but mostly existing these materials are to realize shading by filling a large amount of titanium dioxides, conventionally the loading level of titanium dioxide is more than 18%, single pass through to add the material that titanium dioxide obtains, its shaded effect is lower, and a large amount of titanium dioxides has great destruction to the toughness of PC material and rigidity, make the goods of moulding easily cracked, even add toughner, can not make toughness improve, can not meet some has the goods of requirement to toughness.Therefore, work out the necessary property of PC material that a kind of high shading rate does not affect again rigidity and toughness simultaneously.
Summary of the invention
The object of the invention is to for overcoming the problem of the deficiencies in the prior art and existence, propose a kind of high shading rate PC matrix material, this PC matrix material also has high rigidity, high tenacity, excellent heat resistance and easy-formation when having advantages of high shading rate.
A high shading rate PC matrix material, this PC matrix material comprises the following raw material of metering by weight: 0.1 ~ 0.5 part, 56 ~ 70 parts of PC resins, 15 ~ 20 parts, glass fibre, 10 ~ 15 parts of titanium dioxides, 4 ~ 6 parts of ethylene-methyl acrylate copolymers and shading powder.
Described PC matrix material also comprises by weight 0.5 ~ 1 part of 0.2 ~ 0.5 part of 0.4 ~ 1 part, oxidation inhibitor, the UV light absorber of metering and lubricant.
Described PC resin is low viscosity PC resin, and its melting index is 20g/10min(300 ℃/1.2kg).
Described glass fibre is alkali-free long glass fibres or alkali-free short glass fiber.
Described shading powder is by carbon black and N, and N '-ethylene bis stearamide is by weight 1:(95 ~ 100) composite the forming of ratio.
Described titanium dioxide is any one or several combinations in the R350 of Du Pont, the R103 of Du Pont, the R104 of Du Pont and Mei Li RCL-69.
Described oxidation inhibitor by primary antioxidant and auxiliary antioxidant by weight forming for the ratio of 1:1, primary antioxidant is any one or several combinations in antioxidant 1010, antioxidant 1076 and oxidation inhibitor MD-697, and auxiliary antioxidant is any one or two kinds of combinations in irgasfos 168 and oxidation inhibitor 412S.
Described UV light absorber is any one or several combinations in UV-329, UV-234 and UV-531.
Described lubricant is PETS lubricant.
Another object of the present invention is to propose a kind of preparation method of high shading rate PC matrix material, this preparation method can prepare the high shading rate PC matrix material of feature of the present invention, and low production cost, gained PC matrix material can be used for the production of the electronic apparatus component such as light-emitting diode display, LCD backlight parts, LCD display, and the preparation method of the high shading rate PC of the present invention matrix material comprises the steps:
1) PC resin is dried, drying temperature is 120 ~ 130 ℃, and the water content of dry rear PC resin is lower than 0.02%;
2) by above-mentioned formula ratio, take other raw materials except glass fibre, then this raw material is added to high-speed mixer and mixing 1 ~ 2min;
3) by through step 2) raw material is afterwards added in twin screw extruder, adds the glass fibre of above-mentioned formula ratio in the slender acanthopanax hot-zone of twin screw extruder simultaneously, after extruding pelletization, obtains high shading rate PC matrix material;
Wherein, twin screw extruder Ge district processing temperature is 250 ~ 280 ℃, and screw rod revolution is 250 ~ 300RPM.
The present invention uses glass fibre to replace a part of traditional titanium dioxide as shading composition, this has not only reduced the impact of a large amount of interpolation titanium dioxides on PC matrix material rigidity and toughness, also make rigidity be greatly improved simultaneously, glass fibre also can play good shaded effect, glass fibre add the thermotolerance that has also further improved PC matrix material, these are very necessary to the electronic devices and components for emitting light and heat.Shading powder add the further shaded effect that improved, wherein the carbon black of minute quantity can play very strong opacifying property.Preparation method of the present invention is simple, and technological operation is easy to realize, and titanium dioxide amount is less, does not affect coloured prod toning, and production cost is also minimized simultaneously.In addition, PC matrix material of the present invention also has the features such as good thermotolerance and easy-formation.PC matrix material of the present invention can be widely used in the production of electronic apparatus component such as light-emitting diode display, LCD backlight parts and LCD display etc.
Embodiment
The present invention has disclosed a kind of high shading rate PC matrix material, and this PC matrix material comprises the following raw material of metering by weight: 0.1 ~ 0.5 part, 56 ~ 70 parts of PC resins, 15 ~ 20 parts, glass fibre, 10 ~ 15 parts of titanium dioxides, 4 ~ 6 parts of ethylene-methyl acrylate copolymers and shading powder.
The resin of PC described in the present invention is low viscosity PC resin, and its melting index is 20g/10min(300 ℃/1.2kg).PC resin of the present invention preferred Korea S Samsung SC-1200R, Japanese Supreme Being people L-1225L or Mitsubishi H-3000R.
Glass fibre described in the present invention is alkali-free long glass fibres or alkali-free short glass fiber, glass fibre has replaced a part of traditional titanium dioxide as shading composition, not only reduced the impact of a large amount of interpolation titanium dioxides on PC matrix material rigidity and toughness, also make rigidity be greatly improved simultaneously, glass fibre also can play good shaded effect, also further improved the thermotolerance of PC matrix material, the preferred megalith 988A of glass fibre of the present invention, Mount Taishan T635B or OWENS CORNING 415A simultaneously.
In the present invention, by adding shading powder, further improve the shading rate of PC matrix material, improve the shaded effect of material, described shading powder is by carbon black and N, N '-ethylene bis stearamide is by weight 1:(95 ~ 100) composite the forming of ratio, wherein carbon black can play very strong interception, therefore only need to add a small amount of shading powder can reach required shaded effect, reduced production cost.
Titanium dioxide described in the present invention is any one or several combinations in the R350 of Du Pont, the R103 of Du Pont, the R104 of Du Pont and Mei Li RCL-69, and described material is prior art, can be obtained by commercial.The shading PC material of relative prior art, the present invention replaces the titanium dioxide of part with glass fibre, improved rigidity and the toughness of PC matrix material, and also greatly reduced the production cost of goods, is conducive to the development of enterprise.
In order to improve the work-ing life of PC matrix material, reduce the difficulty of processing of product, the present invention has also added other auxiliary agents, as oxidation inhibitor, UV light absorber and lubricant, those other auxiliary agents measure by weight as 0.5 ~ 1 part of 0.4 ~ 1 part, oxidation inhibitor, 0.2 ~ 0.5 part of UV light absorber and lubricant.
Oxidation inhibitor described in the present invention by primary antioxidant and auxiliary antioxidant by weight forming for the ratio of 1:1, primary antioxidant is any one or several combinations in antioxidant 1010, antioxidant 1076 and oxidation inhibitor MD-697, and auxiliary antioxidant is any one or two kinds of combinations in irgasfos 168 and oxidation inhibitor 412S.Described UV light absorber is any one or several combinations in UV-329, UV-234 and UV-531.Described lubricant is PETS lubricant.
The currently available products that raw material used in the present invention is well known to the skilled person, can obtain by commercial.
The present invention has also disclosed a kind of preparation method of high shading rate PC matrix material, this preparation method can prepare the high shading rate PC matrix material of feature of the present invention, and low production cost, gained PC matrix material can be used for the production of the electronic apparatus component such as light-emitting diode display, LCD backlight parts, LCD display, and the preparation method of the high shading rate PC of the present invention matrix material comprises the steps:
1) PC resin is dried, drying temperature is 120 ~ 130 ℃, and the water content of dry rear PC resin is lower than 0.02%;
2) by formula ratio, take other raw materials except glass fibre, then this raw material is added to high-speed mixer and mixing 1 ~ 2min;
3) by through step 2) raw material is afterwards added in twin screw extruder, adds the glass fibre of formula ratio in the slender acanthopanax hot-zone of twin screw extruder simultaneously, after extruding pelletization, obtains high shading rate PC matrix material;
Wherein, twin screw extruder Ge district processing temperature is 250 ~ 280 ℃, and screw rod revolution is 250 ~ 300RPM.
For those skilled in the art's understanding, below by specific embodiment, the present invention is done to further detailed description.
Embodiment 1
A preparation method for high shading rate PC matrix material, this preparation method comprises the steps:
1) Korea S Samsung SC-1200R is dried, drying temperature is at 120 ℃, and after dry 4h, the water content of PC resin is lower than 0.02%;
2) take 1 part of 0.4 part of 0.5 part, 0.1 part, 4 parts of 10 parts of 69 parts of Korea S Samsung SC-1200R, the R103 of Du Pont, ethylene-methyl acrylate copolymers, shading powder, oxidation inhibitor, UV-329 after step 1) and PETS lubricant, then this raw material is added to high-speed mixer and mixing 1 ~ 2min;
Wherein, the shading powder in the present embodiment is by carbon black and N, and N '-ethylene bis stearamide is by weight composite the forming of ratio of 1:100; Oxidation inhibitor is by primary antioxidant and auxiliary antioxidant by weight for the ratio of 1:1 forms, and primary antioxidant is antioxidant 1010, and auxiliary antioxidant is irgasfos 168;
3) by through step 2) raw material is afterwards added in twin screw extruder, adds 15 parts of megalith 988A in the slender acanthopanax hot-zone of twin screw extruder simultaneously, after extruding pelletization, obtains high shading rate PC matrix material;
Wherein, twin screw extruder Ge district processing temperature is 250 ℃, and screw rod revolution is 300RPM.
Embodiment 2
A preparation method for high shading rate PC matrix material, this preparation method comprises the steps:
1) Japanese Supreme Being people L-1225L is dried, drying temperature is at 130 ℃, and after dry 3.5h, the water content of PC resin is lower than 0.02%;
2) take 1 part of Japanese Supreme Being people L-1225L65 part after step 1), 13 parts of the R350 of Du Pont, 5 parts of ethylene-methyl acrylate copolymers, 0.2 part, shading powder, 0.6 part, oxidation inhibitor, 0.2 part of UV-329 and PETS lubricant, then this raw material is added to high-speed mixer and mixing 1 ~ 2min;
Wherein, the shading powder in the present embodiment is by carbon black and N, and N '-ethylene bis stearamide is by weight composite the forming of ratio of 1:100; Oxidation inhibitor is by primary antioxidant and auxiliary antioxidant by weight for the ratio of 1:1 forms, and primary antioxidant is antioxidant 1076, and auxiliary antioxidant is oxidation inhibitor 412S;
3) by through step 2) raw material is afterwards added in twin screw extruder, adds 15 parts of megalith 988A in the slender acanthopanax hot-zone of twin screw extruder simultaneously, after extruding pelletization, obtains high shading rate PC matrix material;
Wherein, twin screw extruder Ge district processing temperature is 260 ℃, and screw rod revolution is 280RPM.
Embodiment 3
A preparation method for high shading rate PC matrix material, this preparation method comprises the steps:
1) Mitsubishi H-3000R is dried, drying temperature is at 125 ℃, and after dry 4h, the water content of PC resin is lower than 0.02%;
2) take 1 part of 0.5 part of 1 part, 0.5 part, 6 parts of 15 parts of Mitsubishi H-3000R56 part, the R104 of Du Pont, ethylene-methyl acrylate copolymers, shading powder, oxidation inhibitor, UV-234 after step 1) and PETS lubricant, then this raw material is added to high-speed mixer and mixing 1 ~ 2min;
Wherein, the shading powder in the present embodiment is by carbon black and N, and N '-ethylene bis stearamide is by weight composite the forming of ratio of 1:100; Oxidation inhibitor is by primary antioxidant and auxiliary antioxidant by weight for the ratio of 1:1 forms, and primary antioxidant is oxidation inhibitor MD-697, and auxiliary antioxidant is oxidation inhibitor 412S;
3) by through step 2) raw material is afterwards added in twin screw extruder, adds 20 parts of Mount Taishan T635B in the slender acanthopanax hot-zone of twin screw extruder simultaneously, after extruding pelletization, obtains high shading rate PC matrix material;
Wherein, twin screw extruder Ge district processing temperature is 270 ℃, and screw rod revolution is 270RPM.
Embodiment 4
A preparation method for high shading rate PC matrix material, this preparation method comprises the steps:
1) Korea S Samsung SC-1200R is dried, drying temperature is at 120 ℃, and after dry 4h, the water content of PC resin is lower than 0.02%;
2) take 0.6 part of 60 parts of Korea S Samsung SC-1200R, 14 parts of U.S. gift RCL-69 after step 1), 6 parts of ethylene-methyl acrylate copolymers, 0.3 part, shading powder, 0.8 part, oxidation inhibitor, 0.3 part of UV-531 and PETS lubricant, then this raw material is added to high-speed mixer and mixing 1 ~ 2min;
Wherein, the shading powder in the present embodiment is by carbon black and N, and N '-ethylene bis stearamide is by weight composite the forming of ratio of 1:95; Oxidation inhibitor is by primary antioxidant and auxiliary antioxidant by weight for the ratio of 1:1 forms, and primary antioxidant is antioxidant 1010, and auxiliary antioxidant is irgasfos 168;
3) by through step 2) raw material is afterwards added in twin screw extruder, adds 18 parts of OWENS CORNING 415A in the slender acanthopanax hot-zone of twin screw extruder simultaneously, after extruding pelletization, obtains high shading rate PC matrix material;
Wherein, twin screw extruder Ge district processing temperature is 280 ℃, and screw rod revolution is 250RPM.
By the high shading rate PC matrix material injection moulding standard testing batten of embodiment 1 ~ 4 gained and carry out performance test, molding technological condition: 280 ℃ of nozzle temperature, each district's temperature is 275 ℃, 275 ℃, 270 ℃, dwell time 6 ~ 10s, injection pressure 40 ~ 60MPa.The testing method of properties is as follows:
Tensile strength: test according to ASTM D-638 standard;
Modulus in flexure: test according to ASTM D-790 standard;
Lzod notched Izod impact strength: test according to ASTM D-256 standard;
Heat-drawn wire: test according to ASTM D-648 standard;
Transmittance: test according to ASTM D1003-2001 standard, test result is as shown in table 1:
| Performance | Unit | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Tensile strength | MPa | 110 | 108 | 119 | 116 |
| Modulus in flexure | MPa | 6800 | 7300 | 7700 | 7400 |
| Lzod notched Izod impact strength | J/m | 110 | 101 | 95 | 97 |
| Heat-drawn wire | ℃ | 140 | 142 | 145 | 144 |
| Transmittance | % | 1.5 | 1.3 | 0.9 | 1.1 |
The properties table of the high shading rate PC of table 1: embodiment 1 ~ 4 gained matrix material.
As shown in Table 1, PC matrix material of the present invention has the advantages such as high shading rate, high rigidity, high tenacity, excellent heat resistance and easy-formation, the transmittance of resulting product is low to moderate 0.9%, can meet the high opacifying property requirement of people to material, also there is good rigidity, toughness and resistance toheat simultaneously, can be widely used in the production of the electronic apparatus component such as light-emitting diode display, LCD backlight parts and LCD display.
According to the elaboration in above specification sheets, those skilled in the art in the invention can also carry out suitable change and modification to above-mentioned embodiment.Therefore, the content of mentioning in above-described embodiment is not limitation of the invention, is not departing under the prerequisite of inventive concept of the present invention, and any apparent replacement is all within protection scope of the present invention.
Claims (10)
1. a high shading rate PC matrix material, this PC matrix material comprises the following raw material of metering by weight: 0.1 ~ 0.5 part, 56 ~ 70 parts of PC resins, 15 ~ 20 parts, glass fibre, 10 ~ 15 parts of titanium dioxides, 4 ~ 6 parts of ethylene-methyl acrylate copolymers and shading powder.
2. high shading rate PC matrix material according to claim 1, is characterized in that: described PC matrix material also comprises 0.5 ~ 1 part of 0.2 ~ 0.5 part of 0.4 ~ 1 part, oxidation inhibitor, the UV light absorber of metering by weight and lubricant.
3. high shading rate PC matrix material according to claim 1 and 2, is characterized in that: described PC resin is low viscosity PC resin, and its melting index is 20g/10min(300 ℃/1.2kg).
4. high shading rate PC matrix material according to claim 1 and 2, is characterized in that: described glass fibre is alkali-free long glass fibres or alkali-free short glass fiber.
5. high shading rate PC matrix material according to claim 1 and 2, is characterized in that: described shading powder is by carbon black and N, and N '-ethylene bis stearamide is by weight 1:(95 ~ 100) composite the forming of ratio.
6. high shading rate PC matrix material according to claim 1 and 2, is characterized in that: described titanium dioxide is any one or several combinations in the R350 of Du Pont, the R103 of Du Pont, the R104 of Du Pont and Mei Li RCL-69.
7. high shading rate PC matrix material according to claim 2, it is characterized in that: described oxidation inhibitor by primary antioxidant and auxiliary antioxidant by weight forming for the ratio of 1:1, primary antioxidant is any one or several combinations in antioxidant 1010, antioxidant 1076 and oxidation inhibitor MD-697, and auxiliary antioxidant is any one or two kinds of combinations in irgasfos 168 and oxidation inhibitor 412S.
8. high shading rate PC matrix material according to claim 2, is characterized in that: described UV light absorber is any one or several combinations in UV-329, UV-234 and UV-531.
9. high shading rate PC matrix material according to claim 2, is characterized in that: described lubricant is PETS lubricant.
10. a preparation method for high shading rate PC matrix material according to claim 1 and 2, the method comprises the steps:
1) PC resin is dried, drying temperature is 120 ~ 130 ℃, and the water content of dry rear PC resin is lower than 0.02%;
2) by formula ratio, take other raw materials except glass fibre, then this raw material is added to high-speed mixer and mixing 1 ~ 2min;
3) by through step 2) raw material is afterwards added in twin screw extruder, adds the glass fibre of formula ratio in the slender acanthopanax hot-zone of twin screw extruder simultaneously, after extruding pelletization, obtains high shading rate PC matrix material;
Wherein, twin screw extruder Ge district processing temperature is 250 ~ 280 ℃, and screw rod revolution is 250 ~ 300RPM.
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| CN104212152A (en) * | 2014-09-24 | 2014-12-17 | 台州市今上光电科技有限公司 | Novel plastic raw material |
| CN104962056A (en) * | 2015-06-13 | 2015-10-07 | 青岛中新华美塑料有限公司 | High-shading PC (polycarbonate) material and preparing method thereof |
| CN105385098A (en) * | 2015-12-30 | 2016-03-09 | 上海金发科技发展有限公司 | Ultra-high-shading and high-reflective styryl composition |
| US9458308B1 (en) * | 2015-05-12 | 2016-10-04 | Lotte Chemical Corporation | Polycarbonate resin composition with increased gamma-radiation resistant property and molded article using the same |
| CN106280360A (en) * | 2015-05-22 | 2017-01-04 | 乐天化学株式会社 | There is the polycarbonate compositions of the anti-γ-radiance of enhancing and use its mechanograph |
| CN106433065A (en) * | 2016-09-08 | 2017-02-22 | 东莞市亚仑塑料原料有限公司 | High-light-resistance glass fiber reinforced PC plastic and preparation method thereof |
| CN107151434A (en) * | 2017-05-05 | 2017-09-12 | 东莞市骄阳塑胶科技有限公司 | A kind of high shading rate PC/GF composites and preparation method thereof |
| CN109135237A (en) * | 2018-07-25 | 2019-01-04 | 天津金发新材料有限公司 | A kind of novel polycarbonate composition and preparation method thereof |
| CN109337330A (en) * | 2018-09-10 | 2019-02-15 | 广东聚石化学股份有限公司 | A kind of high shading PC composite material and preparation method of halogen-free flameproof |
| CN113174127A (en) * | 2021-05-24 | 2021-07-27 | 上海长伟锦磁工程塑料有限公司 | PC/ABS alloy with high shading, high weather resistance, screw column slippage prevention and excellent antibacterial effect and preparation method thereof |
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| CN104212152A (en) * | 2014-09-24 | 2014-12-17 | 台州市今上光电科技有限公司 | Novel plastic raw material |
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| CN106280360A (en) * | 2015-05-22 | 2017-01-04 | 乐天化学株式会社 | There is the polycarbonate compositions of the anti-γ-radiance of enhancing and use its mechanograph |
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| CN109135237A (en) * | 2018-07-25 | 2019-01-04 | 天津金发新材料有限公司 | A kind of novel polycarbonate composition and preparation method thereof |
| CN109337330A (en) * | 2018-09-10 | 2019-02-15 | 广东聚石化学股份有限公司 | A kind of high shading PC composite material and preparation method of halogen-free flameproof |
| CN113174127A (en) * | 2021-05-24 | 2021-07-27 | 上海长伟锦磁工程塑料有限公司 | PC/ABS alloy with high shading, high weather resistance, screw column slippage prevention and excellent antibacterial effect and preparation method thereof |
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Application publication date: 20140723 |