CN103146169A - PC/ASA (Poly Carbonate/ Acrylonitrile Styrene Acrylate Copolymer) antistatic surface material and preparation method thereof - Google Patents

Abstract

The invention relates to a PC/ASA (Poly Carbonate/Acrylonitrile Styrene Acrylate Copolymer) antistatic surface material and a preparation method thereof, and belongs to the field of high polymer materials. The method comprises the following steps of: S, heating metal powder to fused state; S2, mixing PC resin, ASA resin, SAN (Styrene Acrylonitrile) resin, a compatilizer, an antioxidant and an antistat in parts by weight, and heating the mixture to fused state; and S3, filling products of S1 and S2 to a twin-screw extruder, mixing, fusing and extruding at high speed, performing hot melting and coating on the surface of a product to be processed. The PC/ASA antistatic surface material has good mechanical property, high strength, good rigid balance, heat, light and corrosion resistance and strong stability, so that the service life of the product is prolonged. By utilizing a metal material, the material is high in hardness, so that the shape of the material is not easy to scrape. The preparation method is good in repeatability, controllable in process, low in production cost and beneficial to industrial large-scale application.

Description

Antistatic surfacing of PC/ASA and preparation method thereof

Technical field

The present invention relates to antistatic surfacing of a kind of PC/ASA and preparation method thereof, belong to polymeric material field.

Background technology

Polycarbonate (PC)/propylene is fine-and styrene-propene acid copolymer (ASA) belongs to the polycarbonate alloy class, has good shock resistance, thermotolerance and excellent weathering resistance, is widely used in the aspects such as automobile, electronic product, and prospect is considerable.The sticking dust of inhaling, cause major disaster when serious but plastics very easily produce static.

Polycarbonate (PC)/propylene is fine-styrene-propene acid copolymer (ASA), have excellent electrical insulating property, extensibility, dimensional stability and chemical resistance, higher intensity, thermotolerance and winter hardiness; Also have from put out, the advantage such as fire-retardant, nontoxic, pigmentable, but shortcoming is arranged also: and metallographic phase is more not enough than hardness, this causes its outward appearance to be easier to scratch, but its intensity and toughness are fine, enough longevity; With the metallographic phase ratio, tarnish need to be sprayed paint.

Summary of the invention

Be to solve the deficiencies in the prior art, the object of the invention is to overcome the defective of prior art, antistatic surfacing of PC/ASA that provide that a kind of hardness is high, outward appearance is difficult for scratching, be preferable over automobile and use on the electronic product surface and preparation method thereof.

In order to realize above-mentioned target, the present invention adopts following technical scheme:

The antistatic surfacing of PC/ASA is formed by the component blended melting of following parts by weight:

The antistatic surfacing of aforesaid PC/ASA, the thickness of the antistatic surfacing of described PC/ASA is 1-10mm.

The antistatic surfacing of aforesaid PC/ASA, described compatilizer are PE-g-ST, PP-g-ST, ABS-g-MAH, PE-g-MAH or PP-g-MAH.

The antistatic surfacing of aforesaid PC/ASA, the counterpoise molecular weight of described PC resin are 30000-40000.

The antistatic surfacing of aforesaid PC/ASA, described antioxidant is four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester, β-(4-hydroxy phenyl-3, the 5-di-t-butyl) the positive octadecanol ester of propionic acid, 2,6-ditertbutylparacresol, 4,4'-thiobis (the 6-tertiary butyl-3-(methyl) phenol) one or more.

The antistatic surfacing of aforesaid PC/ASA, described metal-powder are sn-bi alloy Sn42Bi58.

The method of the antistatic surfacing of aforesaid PC/ASA comprises the steps:

S1 heating of metal powder is to molten state;

S2 presses predetermined weight umber mixing PC resin, ASA resin, SAN resin, compatilizer, antioxidant, static inhibitor, with mixture heating up to molten state;

S3 injects twin screw extruder with the product of S1 and S2, and high-speed mixing also melt extrudes, and heat seeling coating is in product surface to be processed.

The preparation method of the antistatic surfacing of aforesaid PC/ASA, described extrusion temperature is the 130-160 degree.

Usefulness of the present invention is: the antistatic surfacing of PC/ASA of the present invention, has good mechanical property, intensity is high, rigid-tough balance is good, and is heat-resisting, fast light, corrosion-resistant, and stability is strong, guaranteed the work-ing life of product, adopted metallic substance, hardness is high, makes material appearance be difficult for scratching; Adopted metallic substance, glossy, need not to spray paint.And preparation method's good reproducibility, process is controlled, and production cost is low, is convenient to large-scale industrialization and uses.

Embodiment

Carry out each composition of proportioning by the weight shown in table 1.

Each composition weight of table 1 embodiment 1-4

Wherein, in embodiment 1-4, compatilizer is ABS-g-MAH.The counterpoise molecular weight of PC resin is 30000-40000.Antioxidant is four (β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester.Metal-powder is sn-bi alloy Sn42Bi58, and fusing point is 138 degree.

Preparation process is as follows:

S1 is according to the predetermined component ratio of table 1, and the heating of metal powder is to molten state;

S2 is pre-mixed PC resin, ASA resin, SAN resin, compatilizer, antioxidant, static inhibitor by the predetermined weight umber, and mixture heating up to molten state (70-100 ℃), is incubated 10 minutes;

S3 injects twin screw extruder with the product of S1 and S2, and body temperature is 160 ℃, and district's temperature is 180 ℃, and two district's temperature are 200 ℃, and three district's temperature are 210 ℃, and four district's temperature are 215 ℃, and engine speed is 20-35rpm; Every district stops 1min.Melt extrude, heat seeling coating is in product surface to be processed, and extrusion temperature is the 138-160 degree.

The performance of the antistatic surfacing of PC/ASA that embodiment 1-4 prepares sees Table 2.

The performance of each embodiment of table 2 and contrast

Wherein, Comparative Examples is the common PC/ASA material that does not add static inhibitor and metal-powder.

This shows, the antistatic surfacing of PC/ASA of the present invention, hardness is higher, and antistatic effect is stronger, and has kept good intensity, toughness and weathering resistance, can satisfy in automotive field and use.

Above demonstration and described ultimate principle of the present invention, principal character and advantage.The technician of the industry should understand, and above-described embodiment does not limit the present invention in any form, and all employings are equal to replaces or technical scheme that the mode of equivalent transformation obtains, all drops in protection scope of the present invention.

Claims (7)

1.PC/ASA antistatic surfacing is formed by the component blended melting of following parts by weight:

PC resin 50-80 part

ASA resin 10-45 part

SAN resin 0-30 part

Compatilizer 2-8 part

Metal-powder 5-10 part

Static inhibitor 1-5 part

Antioxidant 0.3-1 part.

2. the antistatic surfacing of PC/ASA according to claim 1, it is characterized in that: the thickness of the antistatic surfacing of described PC/ASA is 1-10mm.

3. the antistatic surfacing of PC/ASA according to claim 2, it is characterized in that: described compatilizer is PE-g-ST, PP-g-ST, ABS-g-MAH, PE-g-MAH or PP-g-MAH.

4. the antistatic surfacing of PC/ASA according to claim 3, it is characterized in that: the counterpoise molecular weight of described PC resin is 30000-40000.

The antistatic surfacing of PC/ASA according to claim 4, it is characterized in that: described antioxidant is four (β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester, β-(4-hydroxy phenyl-3, the 5-di-t-butyl) the positive octadecanol ester of propionic acid, 2,6-ditertbutylparacresol, 4,4'-thiobis (the 6-tertiary butyl-3-(methyl) phenol) one or more.

5. the antistatic surfacing of PC/ASA according to claim 5, it is characterized in that: described metal-powder is sn-bi alloy Sn42Bi58.

6. prepare the method for the antistatic surfacing of the described PC/ASA of claim 1-6 any one, comprise the steps:

S1 heating of metal powder is to molten state;

S2 presses predetermined weight umber mixing PC resin, ASA resin, SAN resin, compatilizer, antioxidant, static inhibitor, with mixture heating up to molten state;

S3 injects twin screw extruder with the product of S1 and S2, and high-speed mixing also melt extrudes, and heat seeling coating is in product surface to be processed.

7. the preparation method of the antistatic surfacing of PC/ASA according to claim 7, it is characterized in that: described extrusion temperature is the 130-160 degree.