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Polycarbonate/polyester composition and preparation method thereof

A technology of polycarbonate and polycarbonate resin, which is applied in the field of composition and its preparation, can solve problems such as not being able to meet the requirements of use, and achieve the effects of improving nucleation efficiency, chemical resistance, and mechanical properties

Inactive Publication Date: 2010-07-28
SHANGHAI KUMHO SUNNY PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The inventor found in a lot of practical work that simply adding polyester to PC to improve the chemical resistance of the material is still limited, and in some demanding occasions, it still cannot meet the use requirements

Method used

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  • Polycarbonate/polyester composition and preparation method thereof
  • Polycarbonate/polyester composition and preparation method thereof
  • Polycarbonate/polyester composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for preparing a polycarbonate / polyester composition with excellent chemical resistance, the method is a one-step method, comprising the following steps:

[0043] (1) Prepare materials according to the following components, each component is shown in Table 1: polycarbonate (PC), polybutylene terephthalate (PBT), toughening agent, functional auxiliary agent, antioxidant, Lubricant, the content of each component is as shown in table 2;

[0044] (2) Take all the components out of the high-mixer and then put them into the screw machine for extrusion and granulation. The screw machine speed is 300-500rpm and the temperature is 225-260°C to obtain the product.

Embodiment 2-4

[0046] A method for preparing a polycarbonate / polyester composition with excellent chemical resistance, the method is a masterbatch method, comprising the following steps:

[0047] (1) Prepare materials according to the following components, each component is shown in Table 1: polycarbonate (PC), polybutylene terephthalate (PBT), toughening agent, functional auxiliary agent, antioxidant, Lubricant, the content of each component is as shown in table 2;

[0048] (2) After pre-mixing polybutylene terephthalate (PBT) and functional additives in a high-mixer in proportion, put them into a screw machine to extrude and granulate to obtain functional masterbatches. The rotation speed is 300-500rpm, and the temperature is 225-255°C;

[0049] (3) The remaining components and nucleating masterbatch are fully mixed and exported from the high mixer, and then put into the screw machine to extrude and granulate. product.

Embodiment 5

[0076] A method for preparing a polycarbonate / polyester composition with excellent chemical resistance, the method comprising the steps of:

[0077] (1) Prepare materials according to the following components: 50kg polycarbonate (PC), 30kg polybutylene terephthalate (PBT), 5kg ethylene-vinyl acetate copolymer-functionalized maleic anhydride as chemical toughening modification Agent, 1kg ionomer resin as functional additive, 0.1kg tetrakis [β-(3,5-di-tert-butyl 4-hydroxyphenyl) propionate] pentaerythritol ester as antioxidant, 0.1kg lubricant N, N'-ethylene bis stearic acid amide, wherein the polycarbonate resin is an aromatic polycarbonate resin, and the aromatic polycarbonate resin is passed through 1,1-bis(4-hydroxyphenyl)ethane and diphenyl carbonate The ester is obtained by polycondensation reaction, the molecular weight is 30,000, the glass transition temperature is 150°C, and the relative density of polybutylene terephthalate is 1.29-1.35g / cm 3 , the intrinsic viscosity...

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Abstract

The invention relates to a polycarbonate / polyester composition and a preparation method thereof. The composition comprises the following components by wt%: 50-80wt% of polycarbonate, 10-30wt% of polybutylene terephthalate (PBT), 5-15wt% of toughening agents, 1-5wt% of functional agents, 0.1-1wt% of antioxidant and 0.1-2wt% of lubricants. The method comprises the following steps: proportioning according to the components, then proportionally charging the PBT and the functional agents into a high mixing machine to be premixed and carrying out extrusion pelletization on the premixed materials in an extruder to obtain functional master batches; and then fully mixing the rest components with the master batches in the high mixing machine and then carrying out extrusion pelletization on the mixture in a double-screw extruder to obtain the product. Compared with the prior art, the composition has excellent resistance to chemicals and low temperature impact resistance and simultaneously improves the mechanical properaty of the materials.

Description

technical field [0001] The invention relates to a composition and a preparation method thereof, in particular to a polycarbonate / polyester composition and a preparation method thereof. Background technique [0002] Polycarbonate (PC) has excellent properties such as impact resistance, flame retardant characteristics, dimensional stability, small creep, high heat resistance, it is tasteless, odorless, transparent, etc., and it is widely used as an engineering material , especially for situations requiring high impact resistance, the application of PC resin has grown rapidly. However, the disadvantages of PC's poor processability and chemical resistance often lead to great limitations in practical use. [0003] In recent years, PC resin / or alloy materials are also widely used in automotive products (such as grilles / handles / luggage racks, etc.) and household appliances. These products are often painted, such as spray paint, or directly exposed to some chemicals, which require...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L67/02C08L23/08C08J3/22B29B9/06
Inventor 李文强辛敏琦李荣群罗明华张毅
Owner SHANGHAI KUMHO SUNNY PLASTICS
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