CN103740081A - Low-odor and high-impact resistance PC/ASA (polycarbonate/acrylonitrile styrene acrylate) blended material and preparation method thereof - Google Patents

Abstract

The invention discloses a low-order and high-impact resistance PC/ASA (polycarbonate/acrylonitrile styrene acrylate) blended material and a preparation method thereof. The PC/ASA blended material comprises the following raw materials in percentage by weight: 20 to 80 percent of PC, 10 to 55 percent of acrylonitrile-styrene grafted copolymer, 5 to 35 percent of ASA grafted copolymer, 2 to 15 percent of compatilizer and 0.2 to 2 percent of deodorant. The preparation method comprises the following steps of placing the mixed raw materials in a main barrel of a twin-screw extruder with a screw diameter of 35mm and a length-to-diameter ratio L/D of 36, sequentially controlling the temperature from a charging hole to an outlet of a head of the main barrel in nine stages to be 200 DEG C, 230 DEG C, 255 DEG C, 255 DEG C, 255 DEG C, 255 DEG C, 255 DEG C, 255 DEG C and 240 DEG C, cooling extruded strips by using a water tank, and performing grain-sized dicing on the strips to obtain the product, wherein the rotating speed of each of double screws is 300 revolutions per minute. An automotive interior trim part product manufactured from the PC/ASA blended material obtained by the scheme has the advantages of low odor, high impact resistance, high weather resistance and the like; the PC/ASA blended material can be widely applied to automotive interior trim parts such as a sunshield and an automotive dashboard.

Description

A kind of low smell, high-impact PC/ASA intermingling material and preparation method thereof

Technical field

The present invention relates to a kind of automotive upholstery PC/ASA matrix material, be specially a kind of low smell, high-impact PC/ASA intermingling material, and the preparation method of this intermingling material, polymer composite field belonged to.

Background technology

Polycarbonate plastic has high heat-resisting, higher transparency, excellent mechanical property and the good plurality of advantages such as flame retardant resistance is widely used in automotive material and other industry, but it also has obvious shortcoming, for example: higher to notch sensitivity, than being easier to occur stress cracking phenomenon, and viscosity is unfavorable for more greatly processing.

For its advantage of better utilised and effectively improve its shortcoming, it is found that by carrying out blending and modifying with other resin and prepare alloy material and can accomplish than being easier to.For example, prepare PC/ABS alloy and just can effectively improve it to breach sensitivity and the larger shortcoming of viscosity, PC/ABS alloy have viscosity low, be easy to processing, good toughness is widely used in automobile and other industry.

Acrylonitrile-styrene-acrylic ester (ASA) is a kind of engineering plastics similar with ABS mechanical property, and ASA engineering plastics possess good dimensional stability, higher notched Izod impact strength.Simultaneously, compare ASA improve a lot at aspects such as the weathering resistance of material, ultraviolet resistances (approximately improving 10 times) with ABS, therefore PC/ASA material is a kind of alloy material that has more advantage than PC/ABS, and the heat-resisting and mobility that two pieces of patents of CN20101058149 and CN200810207591 just improve PC/ASA alloy material provides preparation method.

Meanwhile, along with the enhancing of people's environmental consciousness and the raising to self health perception, automotive upholstery distributes to low, in the direction of low smell, develops.But the conflicting ASA of being material micromolecular compound distributes the sensation that people are felt under the weather in automobile therewith.

Summary of the invention

The present invention aims to provide low smell for a kind of automotive upholstery, high-impact PC/ASA intermingling material, to solve the problems referred to above of prior art.

Another object of the present invention is to provide the preparation method of this intermingling material.

The present invention is achieved through the following technical solutions.

A kind of low smell, high-impact PC/ASA intermingling material, the raw material that comprises following weight percent meter: polycarbonate (PC): 20-80%, propylene is fine-phenylethene grafted copolymer: 10-55%, acrylonitrile-styrene-acrylic ester graft copolymer ASA:5-35%, compatilizer: 2-15%, deodovization agent: 0.2-2%.

Described polycarbonate is bisphenol A-type aromatic copolycarbonate.Weight-average molecular weight 20000-30000g/mol, polycarbonate of the present invention is known and can obtains by a plurality of commercial channel.

Described acrylonitrile-styrene-acrylic ester graft copolymer (ASA) by weight percentage acrylic elastomer content is 35-85%.

Described compatilizer is vinylbenzene-N-phenyl succinimide-copolymer-maleic anhydride (SMI).

Described deodovization agent is the organic composite inorganic powder of parent white, multi-cellular structure, as Foshan, Guangdong Province Yi Te Chung In produces, and trade mark W100.

The preparation method of above-mentioned low smell, high-impact PC/ASA intermingling material, the steps include:

1) by said ratio, take raw material, the PC through super-dry, SAN, ASA, compatilizer SMI and deodovization agent are mixed;

2) by step 1), the raw material through mixing is placed in screw diameter 35mm, length-to-diameter ratio L/D=36 is in twin screw extruder main barrel, main barrel exports minute nine sections of control temperature from charging opening to head, be followed successively by 200 ℃, 230 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 240 ℃, twin screw rotating speed is 300 revs/min, extrudes material strip pelletizing after tank is cooling and obtains product.

The automotive upholstery goods that the PC/ASA intermingling material being obtained by the present invention program is made, have low smell, high-impact, and the advantages such as good weatherability can be widely used in automotive upholstery, as sun visor, fascia etc.

Embodiment

Below in conjunction with embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.Should be understood that in addition those skilled in the art can change or revise the present invention after having read the content that the present invention tells about, these equivalent form of values fall within the scope that the application's appended claims limits equally.

The embodiment of the present invention is raw materials used:

Polycarbonate: the bisphenol a resin type resin that molecular weight is 24000～27000, Korea S Samsung petro-chemical corporation;

ASA: acrylic elastomer percentage composition approximately 45%, Mitsubishi Li Yang company produces, W-450A;

Compatilizer: vinylbenzene-N-phenyl succinimide-copolymer-maleic anhydride (SMI): NEC chemistry, MS-NA;

Deodovization agent: SW100, Foshan, Guangdong Province Yi Te Chung In.

Product performance testing method:

Tensile property, by ISO527 method, draw speed 50 mm/min.

Bending property, by ISO178 method, trial speed 2 mm/min.

Charpy notched Izod impact strength: press ISO179 method, the sample of 4 mm thick.

Smell: press PV3900C3 method, 80 ℃ of temperature, 2 hours.Smell assessment system divides 6 grades: 1=odorlessness; 2=equals scent of but non interference; 3=has obvious smell but non interference smell; 4=has interference smell; 5=has strong interference smell; 6=makes us standing.Smell evaluation there will be the situation between two evaluation ranks.

Comparative example 1,2 and embodiment 1-6

PC through super-dry, SAN, ASA, compatilizer SMI and deodovization agent are mixed by twin screw extruder (screw diameter 35mm by institute's proportion of composing in table 1, length-to-diameter ratio L/D=36) in main barrel, it is 200 ℃, 230 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 240 ℃ that main barrel divides nine sections of control temperature (exporting from charging opening to head), twin screw rotating speed is 300 revs/min, extrudes material strip pelletizing after tank is cooling and obtains product.The said products is injection molded into standard batten with plastic-injection moulding machine, 250 ℃ of injection temperatures in 85 ℃ after dry 5 hours in convection oven.The batten of injection formed is put into immediately glass moisture eliminator and carry out performance test after room temperature is placed at least 24 hours.Test result is in Table 1.

Composition and the performance of table 1PC/ASA composition

PC/ASA of the present invention has excellent physical and mechanical properties as can be seen from the above table.When compatilizer addition is greater than 10%, the physical and mechanical properties of composition PC/ASA no longer increases, along with the increase composition PC/ASA of deodovization agent addition presents, lowly distribute, the advantage of low smell, possess higher notched Izod impact strength and other mechanical property simultaneously, present the advantage of high-impact.

PC/ASA composition of the present invention has the advantages such as low smell, high-impact, good weatherability, the goods that obtained by the prepared composition injection moulding of the present invention possess the advantages such as low smell, high-impact, good weatherability equally, can be widely used in manufacturing automotive upholstery, as sun visor, fascia etc.

Claims (6)

1. a low smell, high-impact PC/ASA intermingling material, it is characterized in that: the raw material that comprises following weight percent meter: polycarbonate: 20-80%, propylene is fine-phenylethene grafted copolymer: 10-55%, acrylonitrile-styrene-acrylic ester graft copolymer ASA:5-35%, compatilizer: 2-15%, deodovization agent: 0.2-2%.

2. a kind of low smell according to claim 1, high-impact PC/ASA intermingling material, is characterized in that: described polycarbonate is bisphenol A-type aromatic copolycarbonate.

3. a kind of low smell according to claim 1, high-impact PC/ASA intermingling material, is characterized in that: described polycarbonate weight-average molecular weight 20000-30000g/mol.

4. a kind of low smell according to claim 1, high-impact PC/ASA intermingling material, is characterized in that: described acrylonitrile-styrene-acrylic ester graft copolymer by weight percentage acrylic elastomer content is 35-85%.

5. a kind of low smell according to claim 1, high-impact PC/ASA intermingling material, is characterized in that: described compatilizer is vinylbenzene-N-phenyl succinimide-copolymer-maleic anhydride (SMI).

6. a method of preparing PC/ASA intermingling material described in claim 1, is characterized in that: the steps include:

1) by said ratio, take raw material, the PC through super-dry, SAN, ASA, compatilizer SMI and deodovization agent are mixed;

2) by step 1), the raw material through mixing is placed in screw diameter 35mm, length-to-diameter ratio L/D=36 is in twin screw extruder main barrel, main barrel exports minute nine sections of control temperature from charging opening to head, be followed successively by 200 ℃, 230 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 255 ℃, 240 ℃, twin screw rotating speed is 300 revs/min, extrudes material strip pelletizing after tank is cooling and obtains product.