WO2023174070A1 - 一种透明pc/pbt复合材料及其制备方法和应用 - Google Patents

一种透明pc/pbt复合材料及其制备方法和应用 Download PDF

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WO2023174070A1
WO2023174070A1 PCT/CN2023/079324 CN2023079324W WO2023174070A1 WO 2023174070 A1 WO2023174070 A1 WO 2023174070A1 CN 2023079324 W CN2023079324 W CN 2023079324W WO 2023174070 A1 WO2023174070 A1 WO 2023174070A1
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resin
transparent
pbt
average molecular
molecular weight
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PCT/CN2023/079324
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English (en)
French (fr)
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吴俊�
陈平绪
叶南飚
董相茂
岑茵
艾军伟
丁超
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金发科技股份有限公司
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Publication of WO2023174070A1 publication Critical patent/WO2023174070A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/10—Transparent films; Clear coatings; Transparent materials

Definitions

  • the invention relates to the technical field of polymer materials, and in particular to a transparent PC/PBT composite material and its preparation method and application.
  • PC Polycarbonate
  • PMMA polymethyl methacrylate
  • PC has significant advantages in toughness, flame retardant properties, etc., so it is most promising to be used in the preparation of products that require high transparency, such as home appliance panels, visual electronic control boxes, personal care products, water tanks, and ink cartridges wait.
  • the amorphous nature of PC also brings some disadvantages: the molecular chains in the amorphous region are loosely arranged and are easily invaded by small molecules, so PC products are prone to cracking when exposed to chemicals.
  • Chinese patent application CN112029252A discloses a weather-resistant, halogen-free, flame-retardant light-diffusion PC/PBT material for charging pile panels, which mainly includes 77-85 parts of PC, 8-12 parts of PBT, and the flame retardant is bisphenol A bis(diphenyl) base phosphate), 0.3-0.7 parts of methylphenylsiloxane as flame retardant synergist, and add 0.3-1 part of transparent toughener, etc.
  • the material has a light transmittance of more than 90% with a thickness of 1 mm.
  • high viscosity (high weight average molecular weight) PC and low viscosity (low weight average molecular weight) PBT are used for compounding.
  • the sample with the above light transmittance is because the resin matrix forms a translucent state under the compounding of high viscosity PC and low viscosity PBT, and it is difficult to increase the light transmittance by adding other components.
  • the object of the present invention is to provide a PC/PBT composite material with the advantage of high transparency.
  • Another object of the present invention is to provide a preparation method and application of the above-mentioned PC/PBT composite material.
  • a transparent PC/PBT composite material including the following components in parts by weight:
  • PC resin and PBT resin 100 parts
  • the weight average molecular weight range of PC resin is 24000-32000, and that of PBT resin is The weight average molecular weight is 1.01-1.65 times that of the PC resin; the transparent PC/PBT composite material has a transparency greater than 85% and a haze less than 1% at a thickness of 2 mm.
  • Transparency and haze Use an injection molding machine to inject the prepared transparent PC/PBT alloy particles into samples with a thickness of 2mm. Use a transmittance meter to measure the transmittance and haze. The higher the transmittance, the better. The lower the degree, the better.
  • the weight average molecular weight of the PC resin ranges from 24,000 to 32,000, and the weight average molecular weight of the PBT resin is 1.2 to 1.6 times that of the PC resin.
  • the weight average molecular weight of the PC resin ranges from 24,000 to 32,000, and the weight average molecular weight of the PBT resin is 1.4 to 1.5 times that of the PC resin.
  • the weight average molecular weight test method of PC resin and PBT resin in the transparent PC/PBT composite resin matrix can be: use tetrahydrofuran to dissolve the PC/PBT composite material at room temperature for 24 hours, and then filter and separate the solution.
  • PC resin is dissolved in the supernatant solution (solution 1).
  • solution 1 Dissolve the insoluble matter in tetrahydrofuran, heat to 50°C to dissolve for 2 hours, filter the supernatant, and repeat this operation three times to ensure that the PC resin is completely removed.
  • the dissolution time was 24 hours to obtain solution 2.
  • Solution 1 and solution 2 were introduced into gel permeation chromatography (GPC) for molecular weight testing.
  • the PC resin of the present invention is bisphenol A polycarbonate.
  • the phenyl cyclosiloxane is selected from at least one of hexaphenyl cyclotrisiloxane and octaphenyl cyclotetrasiloxane.
  • the phenylcyclosiloxane is selected from octaphenylcyclotetrasiloxane, which has higher transparency.
  • organic pigments such as phthalocyanines, quinocyanines, pyrroles, quinacridones, anthraquinones, thioindigos, azos, biphenyls, Pyrene, perylene, etc.
  • the content of the following substances listed below cannot exceed 2 parts respectively, and the total content cannot exceed 4 parts, otherwise it will have a serious negative impact on the transparency.
  • the content of transparent PC/PBT alloy inorganic filler is less than 1 part, the reinforcing fiber content is less than 1 part, the toughening agent content is less than 1 part, the flame retardant content is less than 2 parts, the antistatic agent content is less than 2 parts, and the wear-resistant agent content is less than 1 part , Inorganic coloring matter is less than 0.5 parts.
  • Inorganic fillers such as talc, mica, etc.
  • Reinforcement fibers such as glass fiber, carbon fiber, etc.
  • Toughening agents such as POE, EPDM, etc.
  • Flame retardants such as brominated flame retardants, halogen-free flame retardants, inorganic flame retardants, etc.;
  • Antistatic agents such as polyether amide, ethoxylated aliphatic alkyl amine, ethoxylated alkyl amine, sodium alkyl sulfonate, etc.;
  • Wear-resistant agents such as polytetrafluoroethylene, molybdenum disulfide, silica microspheres, etc.;
  • Inorganic colorants such as carbon black, inorganic metal pigments and other granular types.
  • auxiliary agents are selected from at least one of antioxidants, lubricants, and light stabilizers.
  • the antioxidant can be: 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene; 2,5-di-tert-butyl Diethyl-4-hydroxybenzyldimethylamine; Diethyl-3,5-di-tert-butyl-4-hydroxybenzylphosphate; Stearyl-3,5-di-tert-butyl-4-hydroxy Benzyl phosphate; 3,5-di-tert-butyl-4-hydroxyphenyl-3,5-distearyl-thiotriazolylamine; 2,6-di-tert-butyl-4-hydroxy Methylphenol; 2,4-di-(n-octylthio)-6-(4-hydroxy-3,5-di-tert-butylglyceryl allyl ether)-1,3,5-triazine; N,N'-hexamethylene bis(3,5-di-tert-
  • the lubricant can be: at least one of stearate lubricants, fatty acid lubricants, and stearate lubricants; the stearate lubricant is selected from calcium stearate, stearin At least one of magnesium acid and zinc stearate; the fatty acid lubricant is selected from at least one of fatty acids, fatty acid derivatives, and fatty acid esters; the stearate lubricant is selected from pentaerythritol At least one stearic acid ester.
  • Light stabilizers can be: hydroxybenzoate UV absorbers, benzophenone UV absorbers, benzotriazole UV absorbers, HALS UV absorbers;
  • the hydroxybenzoate ultraviolet absorber can be selected from 3,5-diisobutyl-4-hydroxybenzoic acid cetyl alcohol ester, 3,5-di-tert-butyl-4-hydroxybenzoic acid-2,4-di Tert-butyl phenyl ester, n-hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate;
  • the benzophenone ultraviolet absorber can be selected from 2,4-dihydroxybenzophenone; 2-hydroxy-4-alkoxybenzophenone, 1,3-bis(methoxy-3-hydroxy- 4-benzophenone) benzene, 2-hydroxy-4-phenylalkoxybenzophenone, 2-hydroxy-4-n-octyloxybenzophenone, 2-hydroxy-4-methyl methacrylate Benzophenone.
  • the benzotriazole ultraviolet absorber can be selected from 2-(2'-hydroxy-5'-methylphenyl) benzotriazole, 2-(2'-hydroxy-5'-methyl)-benzo Triazole, 2-(3',5'-di-tert-butyl-2'-hydroxy)-benzotriazole, 2-(2'-hydroxy-3'-isobutyl-5'-tert-butyl) -Benzotriazole, 2-(2'-hydroxy-3',5'-bis(1,1-dimethylphenyl)-benzotriazole, 2-(2'-hydroxy-5'-tert.
  • Octyl)-benzotriazole 2-(2'-hydroxy-3'-(1,1-dimethylphenyl)-5'-[1,1,3,3-tetramethylbutyl] -At least one of benzotriazole and 2,2'methylene-(6-(2H-benzotriazole)-4-tert-octyl)phenol;
  • the HALS ultraviolet absorber can be selected from bis-2,2,6,6-tetramethylpiperidinol sebacate, N,N'-(2,2,6,6-tetramethyl,4-amino Piperidine)-isophthalamide, bis-1-octyloxy-2,2,6,6-tetramethylpiperidinol sebacate, methacrylic acid (1,2,2,6,6-penta At least one of methyl piperidinol) esters.
  • the preparation method of the transparent PC/PBT composite material of the present invention includes the following steps: mixing each component evenly according to the proportion, and then extruding and granulating through a twin-screw extruder to obtain the transparent PC/PBT composite material; wherein, When the weight average molecular weight range of the PC resin raw material is 30001-33000, the screw temperature range is 240-270°C, and the rotation speed range is 450-600 rpm; when the weight average molecular weight range of the PC resin raw material is 24000-30000, the screw temperature range The range is 200-240°C, and the rotation speed range is 300-450rpm.
  • the factors that affect the weight average molecular weight of PC resin and PBT resin in the resin matrix are mainly heat and shear. Of course, they also include the types of other added components (such as whether to add granular hard materials), each component content, etc., but these factors are auxiliary factors and their influence is significantly less than the heat and shear of the screw.
  • the application of the transparent PC/PBT composite material of the present invention is used to prepare at least one of home appliance panels, visual electronic control boxes, personal care product packaging, water tanks, ink cartridges, cigarette oil boxes, and transparent windows.
  • the transparency of PC resin and PBT resin is significantly reduced after blending, especially after adding a certain amount of phenyl cyclosiloxane, it is almost impossible to be fully transparent (the transmittance is lower than 60%).
  • the present invention explores the weight average molecular weight distribution of PC resin and PBT resin in the PC/PBT composite resin matrix, so that the transparent PC/PBT composite material of the present invention has a light transmittance greater than 85%.
  • the raw materials used in the examples and comparative examples of the present invention are as follows:
  • PC resin-A weight average molecular weight about 25,000, bisphenol A type, manufacturer LG Company;
  • PC resin-B weight average molecular weight about 26,000, bisphenol A type, manufacturer LG Company;
  • PC resin-C weight average molecular weight about 27,000, bisphenol A type, manufacturer: Taiwan Chemical Idemitsu Co., Ltd.;
  • PC resin-D weight average molecular weight about 30,000, bisphenol A type, manufacturer Mitsubishi Corporation;
  • PC resin-E weight average molecular weight about 32,000, bisphenol A type, manufacturer Wanhua Chemical Company;
  • PC resin-F weight average molecular weight about 33,000, bisphenol A type, manufacturer Luxi Chemical Company;
  • PC resin-G weight average molecular weight about 34,000, bisphenol A type, manufacturer Luxi Chemical Company;
  • PC resin-H weight average molecular weight about 23,000, bisphenol A type, manufacturer: Taiwan Chemical Idemitsu Co., Ltd.;
  • PC resin-I weight average molecular weight about 35,000, bisphenol A type, manufacturer Mitsubishi Corporation;
  • PBT resin-A weight average molecular weight is about 30,000, manufacturer Yizheng Chemical Fiber Company;
  • PBT resin-B weight average molecular weight is about 32,000, manufacturer Lanshan Tunhe Company;
  • PBT resin-C weight average molecular weight is about 33,000, manufacturer Yizheng Chemical Fiber Company;
  • PBT resin-D weight average molecular weight is about 34,000, manufacturer Changchun Chemical Company;
  • PBT resin-E weight average molecular weight is about 38,000, manufacturer Yizheng Chemical Fiber Company;
  • PBT resin-F weight average molecular weight is about 39,000, manufacturer Changchun Chemical Company;
  • PBT resin-G weight average molecular weight is about 40,000, manufacturer Yizheng Chemical Fiber Company;
  • PBT resin-H weight average molecular weight is about 41,000, manufacturer Lanshan Tunhe Company;
  • PBT resin-I weight average molecular weight is about 42,000, manufacturer Changchun Chemical Company;
  • Hexaphenylcyclotrisiloxane purity >99.9%, Osaka Gas Company, Japan;
  • Octaphenylcyclotetrasiloxane purity >99.9%, Shanghai Zhide Chemical Co., Ltd.
  • Lubricant pentaerythritol stearate, commercially available.
  • PC/PBT composite material Mix each component evenly, and then extrude and granulate through a twin-screw extruder to obtain a transparent PC/PBT composite material; the processing strength is as follows:
  • Weak 1 The temperature of each section of the screw is set to 200-220°C, and the speed is 300 rpm;
  • Weak 2 The temperature of each section of the screw is set to 210-230°C, and the speed is 350 rpm;
  • Weak 3 The temperature of each section of the screw is set to 220-240°C, and the speed is 450 rpm;
  • Transparency Use an injection molding machine to injection mold the prepared transparent PC/PBT alloy particles into a sample piece with a thickness of 2mm, and use a transmittance meter to measure its transmittance and haze. The higher the transmittance, the better. The lower the haze, the better.
  • the transparency of the PC/PBT composite material of the present invention is greater than 85% and the haze is less than 1% at a thickness of 2 mm.

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Abstract

一种透明PC/PBT复合材料，按重量份计，包括以下组分：PC树脂83-91份；PBT树脂9-17份；苯基环硅氧烷0.05-2份；其中，PC树脂与PBT树脂的总和为100份；透明PC/PBT复合材料树脂基体中，PC树脂的重均分子量范围是24000-32000，PBT树脂的重均分子量是PC树脂的重均分子量的1.01-1.65倍；所述的透明PC/PBT复合材料在2mm厚度下，透明度大于85％，雾度小于1％。本发明通过针对透明PC/PBT复合材料树脂基体中的PC树脂与PBT树脂的重均分子量分布进行探索，使得本发明的透明PC/PBT复合材料具有大于85％的透光率(2mm)。

Description

一种透明PC/PBT复合材料及其制备方法和应用 技术领域
本发明涉及高分子材料技术领域，特别是涉及一种透明PC/PBT复合材料及其制备方法和应用。
背景技术
聚碳酸酯(PC)是一种无定形的高分子材料，具有良好的透明性，透光率可达88～90％，雾度小于0.3，虽然透明性上略低于聚甲基丙烯酸甲酯(PMMA)，但PC在韧性、阻燃性能等方面具有显著优势，因此最有希望应用于制备一些对透明度要求较高的产品，如家电面板、可视化电控盒、个人护理产品、水箱、墨盒等。但PC的非结晶性同时也带来一些缺点：无定形区的分子链排列松散，容易被小分子侵入，因此PC产品在接触化学品时容易出现开裂。
为了提高PC树脂的耐溶剂性，现有技术为在PC中加入高结晶度的PBT，耐溶剂性提升明显。但是，当PBT超过某临界含量后，高结晶下使得透明度快速下降至不透明。
中国专利申请CN112029252A公开了一种充电桩面板用耐候无卤阻燃光扩散PC/PBT材料，其中主要包括77-85份PC、8-12份PBT，阻燃剂为双酚A双(二苯基磷酸酯)7-11份、甲基苯基硅氧烷0.3-0.7份作为阻燃协效剂，并且加入透明增韧剂0.3-1份等。其材料具有1mm厚度90％以上的透光率，但是，该技术方案中采用高粘度(高重均分子量)PC与低粘度(低重均分子量)PBT进行复配，参见本发明的对比例发现无法重复出上述透光率的样品，这是由于高粘度PC与低粘度PBT的复配下树脂基体形成半透明状态，很难通过添加其他组分提高透光率。
发明内容
本发明的目的在于，提供一种PC/PBT复合材料，具有透明度高的优点。
本发明的另一目的在于，提供上述PC/PBT复合材料的制备方法和应用。
本发明是通过以下技术方案实现的：
一种透明PC/PBT复合材料，按重量份计，包括以下组分：
PC树脂  83-91份；
PBT树脂  9-17份；
苯基环硅氧烷  0.05-2份；
其中，PC树脂与PBT树脂的总和为100份；
透明PC/PBT复合材料树脂基体中，PC树脂的重均分子量范围是24000-32000，PBT树脂的 重均分子量是PC树脂的重均分子量的1.01-1.65倍；所述的透明PC/PBT复合材料在2mm厚度下，透明度大于85％，雾度小于1％。
透明度与雾度使用注塑机将制备得到的透明PC/PBT合金粒子注塑成厚度为2mm的样片，使用透光率仪对其透光率和雾度进行测量，透光率越高越好，雾度越低越好。
优选的，透明PC/PBT复合材料树脂基体中，PC树脂的重均分子量范围是24000-32000，PBT树脂的重均分子量是PC树脂的重均分子量的1.2-1.6倍。
更优选的，透明PC/PBT复合材料树脂基体中，PC树脂的重均分子量范围是24000-32000，PBT树脂的重均分子量是PC树脂的重均分子量的1.4-1.5倍。
透明PC/PBT复合材料树脂基体中PC树脂和PBT树脂的重均分子量测试方法可以是：在室温环境下，使用四氢呋喃对PC/PBT复合材料进行溶解24h，对溶液进行过滤分离。上清溶液(溶液1)中溶有PC树脂。将不溶物至于四氢呋喃中，加热至50℃溶解2小时后，滤去上清液，重复此操作3次以确保PC树脂被完全除去。将得到的不溶物在室温下溶解于邻氯苯酚与三氯甲烷的混合溶剂中，(二者体积比为邻氯苯酚：三氯甲烷＝1:3)，溶解时间24h，得到溶液2。将溶液1和溶液2导入凝胶渗透色谱(GPC)中，进行分子量测试。
本发明的PC树脂为双酚A型聚碳酸酯。
所述的苯基环硅氧烷选自六苯基环三硅氧烷、八苯基环四硅氧烷中的至少一种。
优选的，所述的苯基环硅氧烷选自八苯基环四硅氧烷，透明度更高。
为了实现透明彩色复合材料，还可以添加适量的有机颜料，如酞菁类、喹酞酮类、吡咯类、喹吖啶酮类、蒽醌类、硫靛类、偶氮类、联苯类、芘类、苝类等。
为了使PC/PBT合金保持高透明度，列举的，以下物质的含量分别不能够超过2份，总含量不能超过4份，否则会对透明度带来严重的负面影响。透明PC/PBT合金无机填料含量小于1份，增强纤维含量小于1份，增韧剂含量小于1份，阻燃剂含量小于2份，抗静电剂含量小于2份，耐磨剂含量小于1份、无机着色物小于0.5份。
无机填料如滑石粉、云母等；
增强纤维如玻璃纤维、碳纤维等；
增韧剂如POE、EPDM等；
阻燃剂如溴系阻燃剂、无卤阻燃剂、无机阻燃剂等；
抗静电剂如聚醚酰胺、乙氧基化脂肪族烷基胺、乙氧基化烷基酸胺、烷基磺酸钠等等；
耐磨剂如聚四氟乙烯、二硫化钼、二氧化硅微球等；
无机着色物如炭黑、无机金属颜料等颗粒型。
可以根据实际需要决定是否加入0-2份的助剂；所述的助剂选自抗氧剂、润滑剂、光稳定剂中的至少一种。
抗氧剂可以是：1,3,5-三甲基-2,4,6-三(3,5-二-叔丁基-4-羟基苄基)苯；2,5-二-叔丁基-4-羟基苄基二甲胺；二乙基-3,5-二-叔丁基-4-羟基苄基磷酸酯；硬脂基-3,5-二-叔丁基-4-羟基苄基磷酸酯；3,5-二-叔丁基-4-羟基苯基-3,5-二硬脂基-硫代三唑基胺；2,6-二-叔丁基-4-羟基甲基苯酚；2,4-二-(正辛硫基)-6-(4-羟基-3,5-二-叔丁基甘油烯丙基醚基)-1,3,5-三嗪；N,N’-六亚甲基二(3,5-二-叔丁基-4-羟基-氢化肉桂酰胺)；N,N’-双-(3-(3,5-二-叔丁基-4-羟基苯基)丙酰基)己二胺；十八烷基-3-(3,5-二-叔丁基-4-羟基苯基)丙酸酯；季戊四醇基-四[3-(3,5-二-叔丁基-4-羟基苯基)丙酸酯]；三甘醇-二[3-(3,5-二甲基-4-羟基苯基)丙酸酯]；二缩三乙二醇双[β-(3-叔丁基-4-羟基-5-甲基苯基)丙酸酯]；2,2’-硫代二乙基-二[3-(3,5-二-叔丁基-4-羟基苯基)丙酸酯，等。
润滑剂可以是：硬脂酸盐类润滑剂、脂肪酸类润滑剂、硬脂酸酯类润滑剂中的至少一种；所述的硬脂酸盐类润滑剂选自硬脂酸钙、硬脂酸镁、硬脂酸锌中的至少一种；所述的脂肪酸类润滑剂选自脂肪酸、脂肪酸衍生物、脂肪酸酯中的至少一种；所述的硬脂酸酯类润滑剂选自季戊四醇硬脂酸酯中的至少一种。
光稳定剂可以是：羟基苯甲酸酯类紫外线吸收剂、二苯甲酮类紫外线吸收剂、苯并三唑类紫外线吸收剂、HALS类紫外线吸收剂；
羟基苯甲酸酯类紫外线吸收剂可以选自3，5-二异丁基-4-羟基苯甲酸十六醇酯、3,5-二叔丁基-4-羟基苯甲酸-2,4-二叔丁基苯酯、3,5-二叔丁基-4-羟基苯甲酸正十六酯；
二苯甲酮类紫外线吸收剂可以选自2,4-二羟基二苯甲酮；2-羟基-4-烷氧基二苯甲酮、1，3-二(甲氧基-3-羟基-4二苯甲酮)苯、2-羟基-4-苯烷氧基二苯甲酮、2-羟基-4-正辛氧基二苯甲酮、2-羟基-4-甲基丙烯酸甲酯基二苯甲酮。
苯并三唑类紫外线吸收剂可以选自2-(2’-羟基-5’-甲基苯基)苯并三氮唑、2-(2’-羟基-5’-甲基)-苯并三唑、2-(3’,5’-二叔丁基-2’-羟基)-苯并三唑、2-(2’-羟基-3’-异丁基-5’-叔丁基)-苯并三唑、2-(2’-羟基-3’,5’-双(1,1-二甲基苯基)-苯并三唑、2-(2’-羟基-5’-叔辛基)-苯并三唑、2-(2’-羟基-3’-(1,1-二甲基苯基)-5’-[1,1,3,3-四甲基丁基]-苯并三唑、2,2’亚甲基-(6-(2H-苯并三唑)-4-叔辛基)苯酚中的至少一种；
HALS类紫外线吸收剂可以选自癸二酸双2,2,6,6-四甲基哌啶醇酯、N,N’-(2,2,6,6-四甲基,4-胺基哌啶)-间苯二酰胺、癸二酸双1-辛氧基-2,2,6,6-四甲基哌啶醇酯、甲基丙烯酸(1,2,2,6,6-五甲基哌啶醇)酯中的至少一种。
本发明的透明PC/PBT复合材料的制备方法，包括以下步骤：按照配比，将各组分混合均匀，再通过双螺杆挤出机挤出造粒，得到透明PC/PBT复合材料；其中，当PC树脂原料的重均分子量范围是30001-33000时，螺杆的温度范围是240-270℃，转速范围是450-600rpm；当PC树脂原料的重均分子量范围是24000-30000时，螺杆的温度范围是200-240℃，转速范围是300-450rpm。
当螺筒温度范围是240-270℃、转速范围是450-600rpm时，属于强加工，在此加工工艺条件下PC树脂、PBT树脂的重均分子量在熔融剪切的过程中下降幅度较大。
当螺筒温度范围是200-240℃、转速范围是300-450rpm时，属于弱加工，在此加工工艺条件下PC树脂、PBT树脂的重均分子量在熔融剪切的过程中下降幅度较小。
螺杆的加工过程中影响树脂基体中PC树脂、PBT树脂的重均分子量的因素主要为热与剪切，当然还包括其他所添加的组分种类(如是否加入颗粒状硬物料)、各组分含量等相关，但是这些因素属于辅助因素，影响显著小于螺杆的热与剪切。
本发明的透明PC/PBT复合材料的应用，用于制备家电面板、可视化电控盒、个人护理产品包装、水箱、墨盒、烟油盒、透明视窗中的至少一种。
本发明具有如下有益效果
现有技术中，PC树脂与PBT树脂共混后透明度显著下降，特别是添加一定量苯基环硅氧烷后几乎做不到全透明(透光率低于60％)。本发明通过针对PC/PBT复合材料树脂基体中的PC树脂与PBT树脂的重均分子量分布进行探索，使得本发明的透明PC/PBT复合材料具有大于85％的透光率。
具体实施方式
下面结合具体实施例对本发明进行详细说明。以下实施例将有助于本领域的技术人员进一步理解本发明，但不以任何形式限制本发明。应当指出的是，对本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进。这些都属于本发明的保护范围。
本发明实施例和对比例所用原材料如下：
PC树脂-A：重均分子量约25000，双酚A型，厂家LG公司；
PC树脂-B：重均分子量约26000，双酚A型，厂家LG公司；
PC树脂-C：重均分子量约27000，双酚A型，厂家台化出光公司；
PC树脂-D：重均分子量约30000，双酚A型，厂家三菱公司；
PC树脂-E：重均分子量约32000，双酚A型，厂家万华化学公司；
PC树脂-F：重均分子量约33000，双酚A型，厂家鲁西化工公司；
PC树脂-G：重均分子量约34000，双酚A型，厂家鲁西化工公司；
PC树脂-H：重均分子量约23000，双酚A型，厂家台化出光公司；
PC树脂-I：重均分子量约35000，双酚A型，厂家三菱公司；
PBT树脂-A：重均分子量约30000，厂家仪征化纤公司；
PBT树脂-B：重均分子量约32000，厂家蓝山屯河公司；
PBT树脂-C：重均分子量约33000，厂家仪征化纤公司；
PBT树脂-D：重均分子量约34000，厂家长春化工公司；
PBT树脂-E：重均分子量约38000，厂家仪征化纤公司；
PBT树脂-F：重均分子量约39000，厂家长春化工公司；
PBT树脂-G：重均分子量约40000，厂家仪征化纤公司；
PBT树脂-H：重均分子量约41000，厂家蓝山屯河公司；
PBT树脂-I：重均分子量约42000，厂家长春化工公司；
六苯基环三硅氧烷：纯度>99.9％，日本大阪燃气公司；
八苯基环四硅氧烷：纯度>99.9％，上海箴德化工公司。
润滑剂：季戊四醇硬脂酸酯，市售。
实施例和对比例PC/PBT复合材料的制备方法：将各组分混合均匀，再通过双螺杆挤出机挤出造粒，得到透明PC/PBT复合材料；加工强度如下：
弱1：螺杆各区间温度设置为200-220℃，转速300转/分；
弱2：螺杆各区间温度设置为210-230℃，转速350转/分；
弱3：螺杆各区间温度设置为220-240℃，转速450转/分；
强1：螺杆各区间温度设置为240-250℃，转速450转/分；
强2：螺杆各区间温度设置为250-265℃，转速500转/分；
强3：螺杆各区间温度设置为260-270℃，转速600转/分
各项测试方法：
(1)透明度：使用注塑机将制备得到的透明PC/PBT合金粒子注塑成厚度为2mm的样片，使用透光率仪对其透光率和雾度进行测量，透光率越高越好，雾度越低越好。
表1：实施例1-12PC/PBT复合材料各组分含量(重量份)及测试结果

续表1：
由实施例1-12可知，本发明的PC/PBT复合材料的在2mm厚度下，透明度大于85％，雾度小于1％。
由实施例1-10可知，当PBT/PC的重均分子量比值在1.4-1.5范围时，透明度最高。
表2：对比例PC/PBT复合材料各组分含量(重量份)及测试结果

由对比例1可知，PC树脂的保留重均分子量过低，透明度不高。
由对比例2/3可知，当PBT/PC的保留重均分子量比值小于1.01时，透明度很差。
由对比例4可知，当PC树脂的保留重均分子量大于32000时，由于加工困难，透明度也会下降严重。
由对比例5可知，当六苯基环三硅氧烷添加量过多时，透明度下降严重。

Claims (8)

  1. 一种透明PC/PBT复合材料，其特征在于，按重量份计，包括以下组分：
    PC树脂     83-91份；
    PBT树脂    9-17份；
    苯基环硅氧烷  0.05-2份；
    其中，PC树脂与PBT树脂的总和为100份；
    透明PC/PBT复合材料树脂基体中，PC树脂的重均分子量范围是24000-32000，PBT树脂的重均分子量是PC树脂的重均分子量的1.01-1.65倍；
    所述的透明PC/PBT复合材料在2mm厚度下，透明度大于85％，雾度小于1％。
  2. 根据权利要求1所述的透明PC/PBT复合材料，其特征在于，透明PC/PBT复合材料树脂基体中，PC树脂的重均分子量范围是24000-32000，PBT树脂的重均分子量是PC树脂的重均分子量的1.2-1.6倍。
  3. 根据权利要求2所述的透明PC/PBT复合材料，其特征在于，透明PC/PBT复合材料树脂基体中，PC树脂的重均分子量范围是24000-32000，PBT树脂的重均分子量是PC树脂的重均分子量的1.4-1.5倍。
  4. 根据权利要求1所述的透明PC/PBT复合材料，其特征在于，所述的苯基环硅氧烷选自六苯基环三硅氧烷、八苯基环四硅氧烷中的至少一种。
  5. 根据权利要求4所述的透明PC/PBT复合材料，其特征在于，所述的苯基环硅氧烷选自八苯基环四硅氧烷。
  6. 根据权利要求1所述的透明PC/PBT复合材料，其特征在于，按重量份计，还包括0-2份助剂；所述的助剂选自抗氧剂、润滑剂、紫外吸收剂中的至少一种。
  7. 权利要求1-6任一项所述透明PC/PBT复合材料的制备方法，其特征在于，包括以下步骤：按照配比，将各组分混合均匀，再通过双螺杆挤出机挤出造粒，得到透明PC/PBT复合材料；其中，当PC树脂原料的重均分子量范围是30001-33000时，螺杆的温度范围是240-270℃，转速范围是450-600rpm；当PC树脂原料的重均分子量范围是24000-30000时，螺杆的温度范围是200-240℃，转速范围是300-450rpm。
  8. 权利要求1-6任一项所述透明PC/PBT复合材料的应用，其特征在于，用于制备家电面板、可视化电控盒、个人护理产品包装、水箱、墨盒、烟油盒、透明视窗中的至少一种。
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