CN104098883A - High-toughness high-diffusivity PC/PBT alloy material and preparation method thereof - Google Patents

Abstract

The invention aims to provide a high-toughness high-diffusivity PC/PBT alloy material and a preparation method thereof. The high-toughness high-diffusivity PC/PBT alloy material is prepared from the following components in weight ratio: 80-95 percent of PC resin, 5-15 percent of PBT resin, 1-3 percent of a PC/PBT compatilizer, 0.1-2 percent of a self-control diffusant, 0.1-0.5 percent of a dispersing agent, 0.2-0.6 percent of an antioxidant and 0.5-2 percent of other components; all the components are mixed for 1-2 minutes in a high-speed mixer and then the mixture is put into a double-screw extruder for extrusion and granulation, so that the high-toughness high-diffusivity PC/PBT alloy material is obtained. The high-toughness high-diffusivity PC/PBT alloy material can be applied to the optical field instead of light diffusion PC and light diffusion ABS materials, and solves the difficulties that the conventional light diffusion PC and light diffusion ABS materials cannot be used under the conditions with strict requirements (for example, workpieces are provided with self-tapping screws, and the workpieces are not cracked when in contact with glacial acetic acid).

Description

The high dispersion pattern PC/PBT of a kind of high tenacity alloy material and preparation method thereof

Technical field

The present invention relates to a kind of technical field of polymer materials, the high dispersion pattern PC/PBT of especially a kind of high tenacity alloy material and preparation method thereof.

Background technology

Photodiffusion material refers to that the material that a line source can be changed into line area source is generally by being dispersed in the light diffusion particle from the different specific refractions of base material in transparent substrate and preparing, be used in early days the backlight source material of liquid-crystal display, be called again light-scattering material or diffusion material; By photodiffusion material, for light emitting diode LED lighting, be a new Application Areas of opening up in recent years.LED illumination can the higher photodiffusion material for LED illumination compared with the stronger fill light linearity of liquid crystal backlight in diffusion light, must reduce light loss as far as possible; Therefore organic smooth diffusion particle and the polycarbonates of adopting are prepared the LED illumination light diffusion material that has high transmission rate and high light diffusing energy concurrently more by blending method.

But the light diffusion PC material of preparing by blend due to simple PC resin and light diffusing agent exists easy stress cracking, the defects such as poor in processability, under the severe condition of some environmental requirements, there is geneogenous deficiency, limited to a great extent the application neck of light diffusion PC, based on this, the present invention, by improving the deficiency of existing photodiffusion material, meets the demand that client is more and more higher, expands the Application Areas of photodiffusion material.

Summary of the invention

The object of the present invention is to provide a kind of light diffusion PC and light of replacing to spread PBT material, solved simultaneously existing light diffusion PC with light diffusion PBT material under ask for something severe condition (as product to beat self-tapping screw, product will with the situation such as strong acid and strong base contacts) an out of use difficult problem, increased the high dispersion pattern PC/PBT of the high tenacity alloy material and preparation method thereof of the Application Areas of photodiffusion material.

The technical solution used in the present invention: the high dispersion pattern PC/PBT of a kind of high tenacity disclosed by the invention alloy material formula (according to weight percent) is: (1) PC resin: 80-93%, (2) PBT resin: 5-15%, (3) PC/PBT compatilizer: 1-3%, (4) self-control light diffusing agent: 0.1-2%, (5) dispersion agent; 0.1-0.5%, (6) oxidation inhibitor; 0.2-0.6%, (7) other; Each component of 0.5-2% is mixed after 1～2 minute and is put into twin screw extruder extruding pelletization and get final product in high speed mixer.

The high dispersion pattern PC/PBT of wherein said high tenacity alloy material, is characterized in that PC resin is bisphenol A-type polycarbonate, in sticky, its melting index is at 10～12g/10min, and at 120 ℃, dries and within 4 hours, control moisture below 0.1%; PBT resin is to be formed by 1.4-pbt butyleneglycol (1.4-Butylene glycol) and terephthalic acid (PTA) or terephthalate (DMT) polycondensation, and the oyster white of making via mixing program is translucent, crystalline thermoplastic polyester's resin dry at 120 ℃ and control moisture for 4 hours below 0.1%.

PC/PBT compatilizer is the ternary atactic copolymer being formed by vinylbenzene (S), vinyl cyanide (AN) and three kinds of monomer copolymerizations of maleic anhydride (MA), and at 90 ℃, dries and within 4 hours, control moisture below 0.1%; Self-control light diffusing agent is formed by 10% and 90% proportional arrangement by ultra-fine barium sulfate and polysiloxane dispersible granule; Dispersion agent is ethylene acrylic acid co polymer; Oxidation inhibitor is phenolic antioxidant four [β-(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester and phosphite ester kind antioxidant (2,4 di-tert-butyl-phenyl) tris phosphite; Other auxiliary agents are toner and whitening agent.

The high dispersion pattern PC/PBT of high tenacity of the present invention alloy material can meet original light diffusion PC with light diffusion PBT material under ask for something severe condition (as product to beat self-tapping screw, product will with the situation such as strong acid contacts) out of use deficiency, increased greatly the Application Areas of photodiffusion material.Simultaneously this material possess high strength, good toughness, can rapid shaping, the feature such as high performance-price ratio.

Embodiment

Below in conjunction with embodiment, illustrate the present invention.

Embodiment 1

First the PC resin of 92.5% weight is dried at 120 ℃ and within 4 hours, control moisture below 0.1%, at 90 ℃, dry 4 hours control moisture below 0.1% with the PBT resin of 5% weight subsequently, the PC/PBT compatilizer of 1% weight, the self-control light diffusing agent of 0.5% weight, the dispersion agent of 0.3% weight, primary antioxidant four (β-(3 of 0.1% weight, 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester (1010) and 0.1% auxiliary antioxidant three (2, 4-di-tert-butyl-phenyl) phosphorous acid ester (168), other auxiliary agents of 0.5% weight are mixed and from metering feeding device, are entered twin screw extruder after 2 minutes and plastify by high speed mixer, melting, again through extruding, cooling, cross magnetic, be packaged to be product.

Embodiment 2

First the PC resin of 80% weight is dried at 120 ℃ and within 4 hours, control moisture below 0.1%, at 90 ℃, dry 4 hours control moisture below 0.1% with the PBT resin of 13% weight subsequently, the PC/PBT compatilizer of 3% weight, the self-control light diffusing agent of 2% weight, the dispersion agent of 0.5% weight, primary antioxidant four (β-(3 of 0.2% weight, 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester (1010) and 0.3% auxiliary antioxidant three (2, 4-di-tert-butyl-phenyl) phosphorous acid ester (168), other auxiliary agents of 1% weight are mixed and from metering feeding device, are entered twin screw extruder after 2 minutes and plastify by high speed mixer, melting, again through extruding, cooling, cross magnetic, be packaged to be product.

Preparation method and the technique of embodiment are as follows:

(1) raw-material processing and mixing

PC resin dries 4 hours at 120 ℃, controls moisture below 0.1%; PBT resin dries 4 hours at 90 ℃, controls moisture below 0.1%;

Major ingredient and PC/PBT compatilizer, self-control light diffusing agent, dispersion agent, oxidation inhibitor, other auxiliary agents are mixed 2 minutes in high speed mixer, make the abundant dispersed with stirring of each component even;

(2) melt extrude

The material mixing is added in twin screw extruder, melt extrude temperature between 230-270 ℃, screw speed is 400 revs/min;

(3) granulation and aftertreatment

The material of extruding is carried out cooling, air-dry, pelletizing, crosses strong magnetic, is packaged to be finished product.

Performance to the high-performance optical diffusion PC/PBT alloy of embodiment 1 and embodiment 2 gained is as follows

Test event	Testing standard	Test condition	Embodiment 1	Embodiment 2
					Proportion (g/cm3)	D792	23℃	1.20	1.19
Tensile strength (Mpa)	D638	10mm/min	62	58
					Elongation at break (%)	D638	10mm/min	50	56
Flexural strength (Mpa)	D790	2mm/min	96	92
					Modulus in flexure (Mpa)	D790	2mm/min	2400	2300
Notched Izod impact strength (J/m)	D256	3.2mm, 23℃	700	680
					Heat-drawn wire (℃)	D648	1.8Mpa,6.4mm	130	128
Flame retardant resistance (Class)	UL94	1.5mm	V-2	V-2
					Transmittance (%)	D1003	1.0mm	75	72
Mist degree (%)	D1003	1.0mm	23.5	24.5

In sum, be preferred embodiment of the present invention, all changes of having done according to technical solution of the present invention, when the function producing fails to exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.

Claims (9)

1. the high dispersion pattern PC/PBT of a high tenacity alloy material, is characterized in that composed of the following components by weight percentage:

PC resin 80-93%

PBT resin 5-15%

PC/PBT compatilizer 1-3%

Self-control light diffusing agent 0.1-2%

Dispersion agent 0.1-0.5%

Oxidation inhibitor 0.2-0.6%

Other 0.5-2%.

2. the high dispersion pattern PC/PBT of high tenacity as claimed in claim 1 alloy material, is characterized in that PC resin is bisphenol A-type polycarbonate, in sticky, its melting index is at 8～14g/10min, and at 120 ℃, dries and within 4 hours, control moisture below 0.1%.

3. the high dispersion pattern PC/PBT of high tenacity as claimed in claim 1 alloy material, it is characterized in that PBT plastic cement (polybutylene terephthalate), belong to polyester series, be to be formed by 1.4-pbt butyleneglycol (1.4-Butylene glycol) and terephthalic acid (PTA) or terephthalate (DMT) polycondensation, and the oyster white of making via mixing program is translucent, crystalline thermoplastic polyester's resin dry at 120 ℃ and control moisture for 4 hours below 0.1%.

4. the high dispersion pattern PC/PBT of high tenacity as claimed in claim 1 alloy material, it is characterized in that PC/PBT compatilizer is is to take polystyrene as end segment by SEBS-MAH, the ethylene-butene copolymer that the polyhutadiene hydrogenation of take obtains is the linearity three embedding multipolymers of middle elastomeric block; SEBS, not containing unsaturated double-bond, therefore has satisfactory stability and ageing resistance; And at 90 ℃, dry and within 4 hours, control moisture below 0.1%.

5. the high dispersion pattern PC/PBT of high tenacity as claimed in claim 1 alloy material, is characterized in that making by oneself light diffusing agent and is formed by 10% and 90% proportional arrangement by acrylic resin and polysiloxane dispersible granule.

6. the high dispersion pattern PC/PBT of high tenacity as claimed in claim 1 alloy material, is characterized in that dispersion agent is ethylene acrylic acid co polymer.

7. the high dispersion pattern PC/PBT of high tenacity as claimed in claim 1 alloy material, it is characterized in that oxidation inhibitor is phenolic antioxidant four [β-(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester and phosphite ester kind antioxidant (2,4 di-tert-butyl-phenyl) tris phosphite.

8. the high dispersion pattern PC/PBT of high tenacity as claimed in claim 1 alloy material, is characterized in that other auxiliary agents are toner and whitening agent.

9. the preparation method of the high dispersion pattern PC/PBT of high tenacity as claimed in claim 1 alloy material, is characterized in that comprising the following steps:

(1) raw-material processing and mixing

PC resin dries 4 hours at 120 ℃, controls moisture below 0.1%; PBT resin dries 4 hours at 120 ℃, controls moisture below 0.1%;

Major ingredient and PC/PBT compatilizer, self-control light diffusing agent, dispersion agent, oxidation inhibitor, other auxiliary agents are mixed 2 minutes in high speed mixer, make the abundant dispersed with stirring of each component even;

(2) melt extrude

The material mixing is added in twin screw extruder, melt extrude temperature between 230-270 ℃, screw speed is 400 revs/min;

(3) granulation and aftertreatment

The material of extruding is carried out cooling, air-dry, pelletizing, crosses strong magnetic, is packaged to be finished product.