CN102532849A - PC/ASA/PBT (poly carbonate/ acrylonitrile-styrene-acrylate/polybutylene terephthalate) alloy material and preparation method thereof - Google Patents

Abstract

The invention discloses a PC/ASA/PBT (poly carbonate/ acrylonitrile-styrene-acrylate/polybutylene terephthalate) alloy material and a preparation method thereof. The alloy material comprises the following components in parts by weight: 25-65 parts of poly carbonate, 10-25 parts of acrylonitrile-styrene-acrylate grating copolymer, 20-55 parts of polybutylene terephthalate, 2-10 parts of elastomer flexibilizer and the balance of antioxidant. The product disclosed by the invention has the advantages of excellent impact property and good heat resistance and mechanical property, and can be used for automotive inner and outer accessories and the like.

Description

A kind of PC/ASA/PBT alloy material and preparation method thereof

Technical field

The present invention relates to a kind of good impact property that has, have polycarbonate (PC)/acrylonitrile-styrene-acrylic ester (ASA)/polybutylene terephthalate (PBT) alloy material of good heat resistance ability and preparation method thereof simultaneously.

Background technology

Polycarbonate is a kind of engineering plastics of excellent performance, is widely used in every field because of it has excellent mechanical mechanics property and good flame retardancy, like aspects such as various trolley parts, office equipment, casing, packing, medicine, illuminations.Yet meanwhile, polycarbonate also exists shortcomings such as thermotolerance, weathering resistance difference, and therefore, this has limited its further application space again.In order to improve these shortcomings of polycarbonate, people have done the improvement of a lot of aspects.As the various thermoplastic resins of polycarbonate and other are formed intermingling material.These intermingling materials combine the common advantage of polycarbonate and other blending resins usually; Their original some shortcomings have been overcome simultaneously again; Therefore; The intermingling material that adopts this method to obtain not only can overcome some defect problems of polycarbonate, and the excellent specific property of polycarbonate self can not receive very big influence yet.Introduced the preparation method of PC/ABS/PBT and PC/PBT/PET alloy material respectively like CN200510026712 and CN201010583065, the PC alloy material of preparation has the excellent comprehensive performance by this method.Yet the research of PC, ASA and PBT being carried out blending and modifying is also fewer.

Acrylonitrile-styrene-acrylic ester (ASA) has good dimensional stability, higher notch shock performance.Simultaneously, compare with ABS, ASA improves a lot (improving 10 times approximately) at aspects such as the weathering resistance of material, ultraviolet resistances, so the ASA engineering plastics have very big application market space in industries such as automobile, communication, electronics.Polybutylene terephthalate (PBT) is that a kind of flowability is outstanding, thermotolerance, the good thermoplastic polyester that is easy to machine-shaping of weathering resistance, is widely used in auto parts, electronic apparatus, machinery, houseware etc.

Therefore; If polycarbonate and acrylonitrile-styrene-acrylic ester, polybutylene terephthalate are processed intermingling material, then possibly obtain a kind ofly like this have excellent moulding processability, good thermotolerance, weathering resistance and than the material of high impact resistance.Yet, directly that the impact property of the PC/ASA/PBT alloy material of its blend preparation is undesirable, to obtain above-mentioned ideal material for this reason, must adopt toughening technology.

Summary of the invention

The objective of the invention is to overcome the deficiency in the above-mentioned technology, a kind of PC/ASA/PBT alloy material with good impact property, good heat resistance ability and preparation method thereof is provided.

The object of the invention can be realized through following technical scheme:

A kind of polycarbonate/acrylonitrile-cinnamic acrylic ester/polybutylene terephthalate alloy material is made up of polycarbonate, acrylonitrile-styrene-acrylic ester graft copolymer, polybutylene terephthalate, toughner and oxidation inhibitor; Described polycarbonate 25-65 part; Acrylonitrile-styrene-acrylic ester graft copolymer 10-25 part; Polybutylene terephthalate 20-55 part; Elastic body toughening agent 2-10 part.

Said polycarbonate is the bisphenol A-type resin of number-average molecular weight 15000-25000.

Said acrylonitrile-styrene-acrylic ester graft copolymer acrylic elastomer content by weight percentage is 40-80%.

Said elastic body toughening agent is TEB 3K/butadiene/styrene copolymers.

The preparation method of above-mentioned polycarbonate/acrylonitrile-cinnamic acrylic ester/polybutylene terephthalate alloy material is characterized in that:

1) take by weighing each material by said ratio, and conventional auxiliary agent and the tinting material of matrix material;

2) after mixing through exsiccant PC, PBT, ASA, elastic body toughening agent, auxiliary agent and tinting material just; Use the twin screw feeder evenly to add screw diameter continuously and be 35mm; In the twin screw extruder main barrel of length-to-diameter ratio L/D=36; Main barrel divides nine sections controlled temperature: be followed successively by 200 ℃, 230 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 240 ℃ from the outlet of charging opening to head; The twin screw rotating speed is 300 rev/mins, and the extruded stock bar obtains product through tank cooling back pelletizing.

Adopt a kind of polycarbonate/acrylonitrile-cinnamic acrylic ester/polybutylene terephthalate alloy material of technical scheme of the present invention, have excellent impact property, good thermotolerance and mechanical property can be used for inner and outer decorative parts of automobile etc.

Embodiment

Through specific embodiment the present invention is further described below, but said embodiment only is used to explain the present invention rather than restriction the present invention.

The present invention is raw materials used:

PC-1 resin: number-average molecular weight 15,000, Ube chemical industrial company;

PC-2 resin: number-average molecular weight 25,000, Ube chemical industrial company;

PBT resin: German BASF AG product;

MBS: MBS, E920.

ASA-1: the acrylic elastomer percentage composition is about 40%, and Mitsubishi Li Yang company produces

ASA-2: the acrylic elastomer percentage composition is about 70%, and Mitsubishi Li Yang company produces

Antioxidant 1076: Switzerland Ciba company, Irganox 1076;

Oxidation inhibitor 168: the chemical ltd of two keys, Irganox 168;

The product performance testing method:

Density is pressed ISO 1183 methods.

Tensile property is pressed ISO 527 methods, draw speed 50 mm/min.

Bending property is pressed ISO 178 methods, trial speed 2 mm/min.

Charpy notched Izod impact strength: press ISO 179 methods, the sample of 4 mm thick.

Vicat softening temperature: press ISO 306 methods, 50 ℃/minute of temperature rise rates are tested under 5 kilograms of load.

Embodiment 1-4 and comparative example

Proportion of composing mixes the back with even continuously twin screw extruder (the screw diameter 35mm that adds of twin screw feeder in the table 1 pressing through exsiccant PC, PBT, ASA, auxiliary agent and tinting material; Length-to-diameter ratio L/D=36) in the main barrel; It is 200 ℃, 230 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 240 ℃ that main barrel divides nine sections controlled temperature (exporting from charging opening to head); The twin screw rotating speed is 300 rev/mins, and the extruded stock bar obtains product through tank cooling back pelletizing.Said product is injection molded into standard batten with plastic-injection moulding machine in 85 ℃ of dryings after 5 hours in convection oven, 260 ℃ of injection temperatures.The batten of injection formed is put into the glass moisture eliminator immediately and after room temperature is placed at least 24 hours, is carried out performance test.Test result is seen table 1.

The composition and the performance of table 1:PC/ASA/PBT compsn

Can find out from last table data, can effectively improve the notch shock performance of PC/ASA/PBT matrix material, make it have higher vicat softening temperature simultaneously, and other mechanical index be also all relatively good through the mode of adding the elastic body toughening agent.(embodiment 11).

A kind of polycarbonate/acrylonitrile-cinnamic acrylic ester of the present invention/polybutylene terephthalate intermingling material has good impact property, good heat resistance ability and mechanical property, can be used for inner and outer decorative parts of automobile etc.

Claims (5)

1. a PC/ASA/PBT alloy material is characterized in that: be made up of polycarbonate, acrylonitrile-styrene-acrylic ester graft copolymer, polybutylene terephthalate, toughner and oxidation inhibitor; Described polycarbonate 25-65 part; Acrylonitrile-styrene-acrylic ester graft copolymer 10-25 part; Polybutylene terephthalate 20-55 part; Elastic body toughening agent 2-10 part.

2. a kind of PC/ASA/PBT alloy material according to claim 1 is characterized in that: said polycarbonate is the bisphenol A-type resin of number-average molecular weight 15000-25000.

3. a kind of PC/ASA/PBT alloy material according to claim 1 is characterized in that: said acrylonitrile-styrene-acrylic ester graft copolymer acrylic elastomer content by weight percentage is 40-80%.

4. a kind of PC/ASA/PBT alloy material according to claim 1 is characterized in that: said elastic body toughening agent is TEB 3K/butadiene/styrene copolymers.

5. method for preparing the PC/ASA/PBT alloy material is characterized in that:

Concrete steps are following:

1) take by weighing each material by said ratio, and conventional auxiliary agent and the tinting material of matrix material;

2) after mixing through exsiccant PC, PBT, ASA, elastic body toughening agent, auxiliary agent and tinting material just; Use the twin screw feeder evenly to add screw diameter continuously and be 35mm; In the twin screw extruder main barrel of length-to-diameter ratio L/D=36; Main barrel divides nine sections controlled temperature: be followed successively by 200 ℃, 230 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 240 ℃ from the outlet of charging opening to head; The twin screw rotating speed is 300 rev/mins, and the extruded stock bar obtains product through tank cooling back pelletizing.