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Polycarbonate alloy material containing biology-based high polymer and preparation method thereof

A bio-based polymer and polycarbonate technology, applied in the field of polycarbonate alloy materials and its preparation, can solve the problems of undisclosed processing performance, high price of liquid crystal polymers, and large notch sensitivity, so as to improve mechanical properties, Improved compatibility and good processing fluidity

Inactive Publication Date: 2013-07-31
NINGBO JINHAI PLASTIC MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] CN101747611A discloses a polylactic acid / polycarbonate composition and its molded products, the composition of which includes 10-90 wt% polycarbonate and 10-90 wt% polylactic acid, flame retardant, acrylic acid Copolymer and impact reinforcing agent, the composition has good heat resistance, impact strength, flame retardancy and mechanical properties, but the processability of the composition such as melt flow is not disclosed
[0006] CN102020834A discloses a polylactic acid / polycarbonate alloy material, its preparation method and its application. Its components include 10-90 parts by weight of polycarbonate and 10-90 parts by weight of polylactic acid, and 1-20 parts of Liquid crystal polymer and 1-25 parts of toughening agent, the composition has good physical and mechanical properties, impact strength, flexural modulus and heat distortion temperature, and excellent processability, but this improvement mainly depends on the strength of liquid crystal polymer In addition, due to the high price of liquid crystal polymers, the cost of products will increase
Therefore, it is urgent to develop new polycarbonate alloy materials containing bio-based polymers and their preparation methods to meet the requirements of high fluidity of materials during processing and molding of complex-shaped and thin-walled products, and at the same time solve the problem of large gap sensitivity of products. , easy to crack under stress and other problems

Method used

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  • Polycarbonate alloy material containing biology-based high polymer and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] Take the bisphenol A linear polycarbonate (PC) with a melt index (300°C) of 8g / 10min and dry it for 10 hours at a temperature of 120±5°C and a vacuum of 100Pa, and take a melt index (190°C) of 40g / 10min Dry polybutylene succinate (PBS) at 60±5°C and 100Pa vacuum for 10 hours; take 80 kg of dried PC, 20 kg of PBS, 2.5 kg of isocyanate, and 0.25 kg of stannous octoate. Physical mixing; the mixture is injected into a twin-screw extruder to melt, and then extruded through a semi-hyperbolic die with an outlet diameter of 2.0mm and an aspect ratio of 10 at an extrusion temperature of 255°C and an extrusion pressure of 50MPa Press it into the mold, fill the mold completely, and obtain a PC alloy material with a tensile strength of 65MPa, a bending strength of 80MPa, and a notched impact strength of 16kJ / m 2 , the heat distortion temperature is 118 ℃, and the cross-sectional microscopic morphology is that PBS microfibrils with an average diameter of about 12 microns are dispers...

Embodiment 2

[0032] Take the bisphenol A linear polycarbonate (PC) with a melt index (300°C) of 2g / 10min and dry it for 10 hours at a temperature of 120±5°C and a vacuum of 100Pa, and take a melt index (190°C) of 160g / 10min Dry polybutylene succinate (PBS) at a temperature of 60±5°C and a vacuum of 100 Pa for 10 hours; take 95 kg of dried PC and 5 kg of PBS, and 0.5 kg of isocyanate, dibutyl dilauric acid Physically mix 0.05 kg of tin; inject the mixture into a twin-screw extruder to melt, and then pass through a semi-hyperbolic line with an exit diameter of 1.5mm and an aspect ratio of 9 at an extrusion temperature of 235°C and an extrusion pressure of 70MPa The shape die is extruded into the mold, and the mold is completely filled to obtain a PC alloy material with a tensile strength of 67MPa, a bending strength of 86MPa, and a notched impact strength of 18kJ / m 2 , the heat distortion temperature is 130 ℃, and the cross-sectional microscopic morphology is that PBS microfibers with an ave...

Embodiment 3

[0034]Take the bisphenol A linear polycarbonate (PC) with a melt index (300°C) of 14g / 10min and dry it at a temperature of 120±5°C and a vacuum of 100Pa for 10 hours, and take a melt index (190°C) of 100g / 10min Dry polybutylene succinate (PBS) at a temperature of 60±5°C and a vacuum of 100 Pa for 10 hours; take 65 kg of dried PC and 35 kg of PBS, 3.5 kg of isocyanate, and 0.35 kg of stannous octoate Physical mixing; the mixture is injected into a twin-screw extruder to melt, and then extruded through a semi-hyperbolic die with an outlet diameter of 2.0mm and an aspect ratio of 10 at an extrusion temperature of 215°C and an extrusion pressure of 30MPa Press it into the mold, fill the mold completely, and obtain a PC alloy material with a tensile strength of 65MPa, a bending strength of 78MPa, and a notched impact strength of 15kJ / m 2 , the heat distortion temperature is 116 ℃, and the cross-sectional microscopic morphology is that PBS microfibers with an average diameter of abo...

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Abstract

The invention relates to a polycarbonate alloy material containing a biology-based high polymer and a preparation method thereof. The polycarbonate alloy material comprises the following components in parts by mass: 65-95 parts of polycarbonate, 5-35 parts of a biology-based high polymer, 0.5-4.5 parts of isocyanate and 0.05-0.45 part of a tin catalyst. The preparation method comprises the following steps of: firstly, drying polycarbonate and the biology-based high polymer in vacuum respectively; secondly, physically mixing according to a certain proportion, melting and blending; and lastly, extruding into a mold for molding. The polycarbonate alloy material disclosed by the invention has high processing flowability at a low extruding temperature and under a low extruding pressure, and has environmental protection characteristic and high mechanical property; and the preparation method can be used for effectively increasing production efficiency and improving product quality, and has agood application prospect.

Description

technical field [0001] The invention belongs to the field of polycarbonate alloy materials and preparation thereof, in particular to a polycarbonate alloy material containing bio-based polymers and a preparation method thereof. Background technique [0002] Polycarbonate (PC) has excellent heat resistance, toughness and dimensional stability, and is widely used in automobiles, electronic appliances and other fields. However, PC melt has high viscosity, poor fluidity, and difficult processing and molding, especially complex shapes and thin-walled products, which are prone to problems such as incomplete mold filling during injection molding. [0003] Preparation of alloy materials by blending PC with other polymers is one of the effective ways to improve the above-mentioned processing and performance defects. For example, the literature [Pham HT, Weckle CL, Ceraso JM. Adv. Mater. 2000 12 (23): 1881-1885] reported that adding ABS to PC, the prepared alloy material has signific...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L67/02C08L67/04C08K5/29
Inventor 张海振
Owner NINGBO JINHAI PLASTIC MOLD
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