CN102352096A - Non-halogen flame retardant PC (polycarbonate) /ABS (acrylonitrile butadiene styrene) alloy and preparation method thereof - Google Patents

Abstract

The invention discloses a non-halogen flame retardant PC (polycarbonate) /ABS (acrylonitrile butadiene styrene) alloy with high heat distortion temperature. The alloy comprises the following components in parts by weight: 50-85 parts of PC resin, 3-25 parts of ABS resin, 3-8 parts of toughening agent, 8-20 parts of flame retardant, 0.3-1 part of antioxidant A, 0.3-1 part of antioxidant B and 0.3-0.8 part of anti-dripping agent, wherein the PC resin is bisphenol A-type polycarbonate resin, the ABS resin is acrylonitrile-butadiene-styrene resin, the toughening agent is maleic anhydride grafted ABS resin blend, the flame retardant is at least one of hydroxymethylphenyl hypophosphite salt, methylphenyl phosphate salt, methylphenyl phosphate and methylphenyl phosphite, the antioxidant A is pentaerythrityl-tetra-[beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], the antioxidant B is tris(2,4-ditert-butylphenyl)phosphite and the anti-dripping agent is polytetrafluoethylene resin. The invention also provides a method for preparing the alloy.

Description

A kind of halogen-free flame retardant PC/ABS Alloy And Preparation Method

Technical field

The present invention relates to a kind of halogen-free flame retardant PC/ABS alloy, also relate to the method for preparing this alloy.

Background technology

In recent years, along with the development of electronic product and people to the attention of ecotope, as the PC/ABS alloy of electronic product casing material, run into more and more higher challenge.The general requirement of PC/ABS alloy is that the halogen-free flame-retardance ability will be arranged, and has so both reduced the harm that product in use produces fire, reduces the influence of product to environment again.At present; It is that product is done fire retardant that halogen-free flame retardant PC/ABS alloy adopts phosphorus such as BDP, RDP and TPP mostly; The product made from these fire retardants; The flame retardant resistance and the feature of environmental protection no doubt can satisfy requirement of client; But their adding also makes other mechanical properties of PC/ABS alloy receive serious disadvantageous effect; Like shock strength, flexural strength, modulus in flexure, heat-drawn wire etc.; Particularly when product used under comparatively high temps for a long time, common halogen-free flame retardant PC/ABS alloy just can't satisfy requirement of products.

Summary of the invention

For overcoming the defective of prior art, the technical problem that the present invention will solve has provided a kind of heat-drawn wire height, has made with its product long-time halogen-free flame retardant PC/ABS alloy that uses under comparatively high temps as shell.

Technical scheme of the present invention is: this halogen-free flame retardant PC/ABS alloy; Comprise 50-85 part PC resin; 3-25 part ABS resin; 3-8 part toughner; 8-20 part fire retardant; 0.3-1 part antioxidant A; 0.3-1 part antioxidant B; 0.3-0.8 part anti-dripping agent; Wherein said PC resin is the bisphenol A polycarbonate resin; Said ABS resin is the acrylonitrile-butadiene-phenylethylene resin; Said toughner is the maleic anhydride grafted ABS resin blend; Said fire retardant is the hydroxymethyl phenyl phosphinates; Aminomethyl phenyl phosphoric acid salt; The aminomethyl phenyl phosphoric acid ester; At least a in the aminomethyl phenyl phosphorous acid ester; Oxidation inhibitor A is four [β-(3; The 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester; Oxidation inhibitor B is tricresyl phosphite (24-di-tert-butyl-phenyl) ester, and anti-dripping agent is a teflon resin.

Owing to adopt above proportioning and raw material; So this halogen-free flame retardant PC/ABS alloy not only flame retardant effect can reach the fire-retardant requirement of V0 level; Meet the desired halogen-free environmental standard of electric appliance casing; And very little to the influence of the heat-drawn wire of PC/ABS alloy, improved the use temperature scope of halogen-free flame retardant PC/ABS alloy greatly.

The preparation method of a kind of halogen-free flame retardant PC/ABS alloy also is provided, has may further comprise the steps:

(1) with PC resin under 110 ℃ of conditions dry 4 hours; With ABS resin, toughner, fire retardant, oxidation inhibitor A, oxidation inhibitor B, anti-dripping agent under 90 ℃ of conditions dry 4 hours; Behind each material of the described ratio weighing of claim 1, mix in the adding high-speed mixer;

(2) material that will mix joins in the twin screw extruder of assigned temperature, produces, cooling, pelletizing, stirs;

(3) the finished product particle that step (2) is obtained was dried 2-4 hour under 110 ℃ of conditions, made product pellet obtain thorough drying;

(4) product pellet is injection molded into batten, and is that 21-25 ℃, humidity are to leave standstill 4 hours under the condition of 45-55%, make the batten Stability Analysis of Structures, and, test its performance intensity with after envrionment temperature is consistent in temperature;

(5) will stir and particle that the performance strength test is qualified, become finished product with the 25KG/ collation package.

Embodiment

Do further detailed description in the face of technical scheme of the present invention down.

This halogen-free flame retardant PC/ABS alloy; Comprise 50-85 part PC resin; 3-25 part ABS resin; 3-8 part toughner; 8-20 part fire retardant; 0.3-1 part antioxidant A; 0.3-1 part antioxidant B; 0.3-0.8 part anti-dripping agent; Wherein said PC resin is the bisphenol A polycarbonate resin; Said ABS resin is the acrylonitrile-butadiene-phenylethylene resin; Said toughner is the maleic anhydride grafted ABS resin blend; Said fire retardant is the hydroxymethyl phenyl phosphinates; Aminomethyl phenyl phosphoric acid salt; The aminomethyl phenyl phosphoric acid ester; At least a in the aminomethyl phenyl phosphorous acid ester; Oxidation inhibitor A is 1010; I.e. four [β-(3; The 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester; Oxidation inhibitor B is 168; Be tricresyl phosphite (24-di-tert-butyl-phenyl) ester, anti-dripping agent is a teflon resin.

Owing to adopt above proportioning and raw material; So this halogen-free flame retardant PC/ABS alloy not only flame retardant effect can reach the fire-retardant requirement of V0 level; Meet the desired halogen-free environmental standard of electric appliance casing; And very little to the influence of the heat-drawn wire of PC/ABS alloy, improved the use temperature scope of halogen-free flame retardant PC/ABS alloy greatly.

Preferably, 65 parts of PC resins, 18 parts of ABS resin, 5 parts of toughner, 10 parts of fire retardants, antioxidant A0.5 part, antioxidant B1 part, anti-dripping agent are 0.5 part.

The preparation method of a kind of halogen-free flame retardant PC/ABS alloy also is provided, has may further comprise the steps:

(1) with PC resin under 110 ℃ of conditions dry 4 hours; With ABS resin, toughner, fire retardant, oxidation inhibitor A, oxidation inhibitor B, anti-dripping agent under 90 ℃ of conditions dry 4 hours; Behind each material of the described ratio weighing of claim 1, mix in the adding high-speed mixer;

(2) material that will mix joins in the twin screw extruder of assigned temperature, produces, cooling, pelletizing, stirs;

(3) the finished product particle that step (2) is obtained was dried 2-4 hour under 110 ℃ of conditions, made product pellet obtain thorough drying;

(4) product pellet is injection molded into batten, and is that 21-25 ℃, humidity are to leave standstill 4 hours under the condition of 45-55%, make the batten Stability Analysis of Structures, and, test its performance intensity with after envrionment temperature is consistent in temperature;

(5) will stir and particle that the performance strength test is qualified, become finished product with the 25KG/ collation package.

Wherein the agitation vat motor rotary speed of the high mixer of step (1) is 1200 rev/mins, churning time 10-15 minute.

Assigned temperature in the step (2), promptly the twin screw extrusion temperature (℃), as shown in table 1.

Table 1

(unit be ℃)

The agitation vat motor rotary speed of the stirring of step (2) is 200 rev/mins, churning time 10-15 minute.

The desired injection temperature of step (4) (℃) as shown in table 2.

Table 2

First section	Second section	The 3rd section
			210-230	210-230	210-230

(unit be ℃)

Below be that the batten of bisphenol A polycarbonate and acrylonitrile-butadiene-phenylethylene carries out the performance strength test to main component.

Testing tool: universal tensile testing machine; The impact strength test machine; The melting index trier; UL94 plastics burning tester; The specific weight determine appearance; Thermal distortion dimension card trier; X-ray environmental protection test appearance.

Specifeca tion speeification is as shown in table 3.

Table 3

The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs to the protection domain of technical scheme of the present invention to any simple modification, equivalent variations and modification that above embodiment did.

Claims (3)

1. halogen-free flame retardant PC/ABS alloy; It is characterized in that: comprise 50-85 part PC resin; 3-25 part ABS resin; 3-8 part toughner; 8-20 part fire retardant; 0.3-1 part antioxidant A; 0.3-1 part antioxidant B; 0.3-0.8 part anti-dripping agent; Wherein said PC resin is the bisphenol A polycarbonate resin; Said ABS resin is the acrylonitrile-butadiene-phenylethylene resin; Said toughner is the maleic anhydride grafted ABS resin blend; Said fire retardant is the hydroxymethyl phenyl phosphinates; Aminomethyl phenyl phosphoric acid salt; The aminomethyl phenyl phosphoric acid ester; At least a in the aminomethyl phenyl phosphorous acid ester; Oxidation inhibitor A is four [β-(3; The 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester; Oxidation inhibitor B is tricresyl phosphite (24-di-tert-butyl-phenyl) ester, and anti-dripping agent is a teflon resin.

2. halogen-free flame retardant PC according to claim 1/ABS alloy is characterized in that: 0.5 part of 65 parts of PC resin, 18 parts of ABS resin, 5 parts of toughner, 10 parts of fire retardants, antioxidant A0.5 part, antioxidant B1 part, anti-dripping agent.

3. the preparation method of halogen-free flame retardant PC according to claim 1/ABS alloy is characterized in that: may further comprise the steps:

(1) with PC resin under 110 ℃ of conditions dry 4 hours; With ABS resin, toughner, fire retardant, oxidation inhibitor A, oxidation inhibitor B, anti-dripping agent under 90 ℃ of conditions dry 4 hours; Behind described each raw material of ratio weighing of claim 1, mix in the adding high-speed mixer;

(2) material that will mix joins in the twin screw extruder of assigned temperature, produces, cooling, pelletizing, stirs;

(3) the finished product particle that step (2) is obtained was dried 2-4 hour under 110 ℃ of conditions, made product pellet obtain thorough drying;

(4) product pellet is injection molded into batten, and is that 21-25 ℃, humidity are to leave standstill 4 hours under the condition of 45-55%, make the batten Stability Analysis of Structures, and, test its performance intensity with after envrionment temperature is consistent in temperature;

(5) will stir and particle that the performance strength test is qualified, become finished product with the 25KG/ collation package.