Polycarbonate resin composition having improved compatibility and having good scratch resistance and transparency and products using same
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A polycarbonate resin and composition technology, applied in the field of polycarbonate resin composition, can solve the problems of high turbidity, processing cost, large processing time, high turbidity growth rate, low transparency, etc., and achieve good appearance Effect
Active Publication Date: 2018-07-20
LOTTE CHEM CORP
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[0006] According to U.S. Published Patent No. 2012-0121845, coating silica nanoparticles on polycarbonate substrates increases surface hardness, however, involves processing costs due to secondary processing of the coating, consumes a large amount of processing time, and is expensive. Disadvantages of Turbidity Growth Rate
[0007] U.S. Patent No. 8,088,849 discloses a technique for polycarbonate substrates using ether phosphoric acid compounds and halogen compounds to increase surface hardness and flame retardancy while maintaining transparency, however, gases harmful to humans are generated during combustion due to halogen compounds Shortcomings
[0008] In Korean Laid-Open Patent No. 2009-0039612, a methacrylic acid copolymer resin composition was used to improve scratch resistance, but disadvantages of high turbidity and low transparency occurred
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[0032] The polycarbonate resin can be prepared according to a common preparation method. For example, polycarbonate resins can be prepared by reacting a dihydric phenol compound with phosgene in the presence of a molecular weight regulator and a catalyst, or by transesterification of a dihydric phenol compound and a precursor from diphenyl carbonate.
[0033] Here, the dihydroxyphenol compound may be a bisphenol compound, and may preferably be bisphenol A (2,2-bis(4-hydroxyphenyl)propane). In this case, bisphenol A may be partially or completely substituted by other types of dihydroxyphenol compounds. For example, hydroquinone, 4,4-dihydroxybiphenyl, bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 2,2-bis(3, 5-dimethyl-4-hydroxyphenyl)propane, bis(4-hydroxyphenyl)sulfide, bis(4-hydroxyphenyl)sulfone, bis(4-hydroxyphenyl)sulfoxide, bis(4-hydroxyphenyl)sulfoxide Hydroxyphenyl)ketone, bis(4-hydroxyphenyl)ether, 2,2-bis(3,5-dibromo-4-hydroxyphenyl)propane, etc....
Embodiment 1
[0063] 70 parts by weight of a polycarbonate resin (bisphenol A type, weight average molecular weight of 25,000), 30 parts by weight of a methacrylic copolymer resin (H-880, Mitsubishirayon) having a refractive index of 1.54-1.56 and a weight average molecular weight of 2,500 were mixed ), and 0.05 parts by weight of N,N'-ethylenebis(stearamide), and using a twin-screw extruder (screw diameter 26mm, L / D=40) at an extrusion temperature of 270-300°C and A pellet-type polycarbonate resin composition was prepared under extrusion conditions of a screw rotation speed of 200 rpm.
Embodiment 2
[0065] The same procedure as in Example 1 was followed except that 0.1 part by weight of N,N'-ethylenebis(stearamide) was mixed to produce a pellet-type polycarbonate resin composition.
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Abstract
The present invention relates to a polycarbonate resin composition, and more particularly, to a polycarbonate resin composition to extend a use range of a transparent polycarbonate material with a high hardness, and a product using the same. A resin composition with an improved surface hardness and an excellent optical characteristic without a secondary process is suggested as a methacrylate based copolymer / polycarbonate resin composition to extend the use range of the transparent polycarbonate material with the high hardness, however a polycarbonate and methacrylate based copolymer resin has a problem causing a phase separation in a high temperature and high pressure condition due to a behavior difference. Thus, a transparent polycarbonate resin composition with the high hardness extends the processability of the polycarbonate resin composition and overcomes a limitation stated as above by using a specific additive. Further, a product using the same is disclosed. According to the present invention, the polycarbonate resin composition comprises: 50 to 90 wt% of a polycarbonate resin; 10 to 50 wt% of a methacrylate copolymer resin with a weight-average molecular weight of 2,000 to 3,000 g / mol; and 0.001 to 1 parts by weight of an amide based stabilizer with respect to 100 parts by weight of the total amount of the polycarbonate resin and the methacrylate copolymer resin.
Description
technical field [0001] The present disclosure relates to polycarbonate resin compositions, and more particularly, to polycarbonate resin compositions and products using the same that expand the range of uses of transparent polycarbonate materials having high hardness. Background technique [0002] Polycarbonate resins have good impact resistance and mechanical properties (mechanical properties), and exhibit high transparency, good dimensional stability, and a wide range of coloring properties. In accordance with recent trends regarding cost reduction, enlargement and weight reduction of electrical and electronic products, commonly used glass or metal materials are rapidly being replaced by plastic products made with polycarbonate resins, and their use has expanded to automotive parts and electrical and electronic products . Therefore, when compared with conventional materials, the function and appearance as an exterior material become more prominent, and improvement in perf...
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