CN104693746A

CN104693746A - Mineral reinforced PC/PBT modified alloy and preparation method thereof

Info

Publication number: CN104693746A
Application number: CN201310660502.2A
Authority: CN
Inventors: 不公告发明人
Original assignee: Qingdao Tongchuang Energy Saving Environmental Protection Engineering Co Ltd
Current assignee: Qingdao Tongchuang Energy Saving Environmental Protection Engineering Co Ltd
Priority date: 2013-12-10
Filing date: 2013-12-10
Publication date: 2015-06-10

Abstract

The present invention discloses a mineral reinforced PC/PBT modified alloy and a preparation method thereof. The mineral reinforced PC/PBT modified alloy provided by the invention comprises the following components by weight: 20% to 60% of PC, 10% to 40% of PBT, 5% to 15% of mineral fillers, 0.1% to 0.5% of a coupling agent, 5% to 10% of a flame retardant, 0.1% to 1.5% of triphenyl phosphite, 1% to 3% of a compatibilizing agent, 0.1% to 0.5% of an antioxidant and 0.1% to 1% of a lubricant. The invention has the following beneficial effects: the mineral reinforced PC/PBT modified alloy prepared by adopting a two-step extrusion method inherits excellent impact resistance of PC and good chemical resistance of PBT, and PC is capable of improving the processing properties of PBT; and the mineral reinforced PC/PBT modified alloy has good reinforcement, adsorption and air-purification functions, and a good flame-retardant property, reaching the flame retardant rating of UL94V-0.

Description

PC/PBT modified alloy that a kind of mineral strengthen and preparation method thereof

Technical field

The present invention relates to technical field of polymer materials, PC/PBT modified alloy of specifically a kind of mineral enhancing and preparation method thereof.

Background technology

Polycarbonate (PC)/polybutylene terephthalate (PBT) alloy (being called for short PC/PBT) has high thermotolerance, and good impact property, processibility and chemical proofing etc. are a kind of engineering plastics that industrial using value is higher.In order to improve the mechanical property, improvement processing characteristics etc. of PC/PBT alloy further, in this alloy system, often introduce three components, as fire retardant, toughener etc., thus the object realizing improving SNR and reduce costs.

Summary of the invention

PC/PBT modified alloy that the object of the present invention is to provide the mineral that a kind of flame retardant properties is good, mechanical strength is high, with low cost to strengthen and preparation method thereof.

The technical solution adopted for the present invention to solve the technical problems is: the PC/PBT modified alloy that a kind of mineral strengthen, and its component by mass percent proportioning is: PC 20% ~ 60%, PBT 10% ~ 40%, mineral filler 5% ~ 15%, coupling agent 0.1% ~ 0.5%, fire retardant 5% ~ 10%, triphenyl phosphite 0.1% ~ 1.5%, compatilizer 1% ~ 3%, oxidation inhibitor 0.1% ~ 0.5%, lubricant 0.1% ~ 1%.

Described PC is bisphenol A-type aromatic copolycarbonate, and weight-average molecular weight is 20000 ~ 40000g/mol.

Described PBT is polybutylene terephthalate, and its intrinsic viscosity is 0.8 ~ 1.2dL/g.

Described mineral filler is particle diameter at 800 order ~ 1250 orders and take aluminosilicate as the zeolite powder of fundamental component, and its density is 2.1 ~ 2.2g/cm ³, the function that there is enhancing, adsorb and purify air.

Described coupling agent is aluminium titanium composite coupler.

Described fire retardant is the polydimethylsiloxane (PDMS) of mass ratio 1:4 and the compound flame retardant of dihydroxyphenyl propane-bis-(diphenyl phosphoester) (BDP).

Described compatilizer is ternary graft copolymer SEBS-g-GMA.

Described oxidation inhibitor is the one in antioxidant 1010, antioxidant 1076, oxidation inhibitor 2921.

Described lubricant is pentaerythritol stearate.

The preparation method of the PC/PBT modified alloy that above-mentioned a kind of mineral strengthen, comprises the following steps:

(1), by PC in blast drier at 110 DEG C ~ 130 DEG C temperature dry 3 ~ 4 hours, PBT at 130 DEG C ~ 150 DEG C dry 3 ~ 4 hours, mineral filler and fire retardant be drying 30 ~ 45 minutes at 60 DEG C ~ 85 DEG C respectively separately, stand-by;

(2) take dry mineral filler and coupling agent, by weight ratio, add a material temperature degree in the high-speed mixer of 80 DEG C ~ 120 DEG C, after rotating speed 3000 ~ 6000 revs/min stirs 10 ~ 60 minutes, be cooled to lower than 40 DEG C of dischargings stand-by;

(3), by taking dry PBT by weight ratio, fire retardant, oxidation inhibitor, lubricant add in high-speed mixer, after to make to stir together 3 ~ 10 minutes all mixed, discharging add in twin screw extruder carry out melt extruding, cooling granulation, and stand-by after drying;

(4), the product taking dry PC and step (3) is by weight ratio added in high-speed mixer, add the product taking step (2) by weight ratio simultaneously, and add the triphenyl phosphite and compatilizer that take by weight ratio, after to make to stir together 3 ~ 15 minutes all mixed, discharging adds in twin screw extruder, by twin screw extruder fully plastify blended after extrude, cooling granulation, get product.

The invention has the beneficial effects as follows, compared with prior art, the PC/PBT modified alloy that a kind of mineral that the present invention adopts two step extrusion moldings to obtain strengthen, not only there is the excellent impact resistance energy of PC and the good chemical resistance of PBT, PC can improve the processing characteristics of PBT simultaneously, and the function that there is good enhancing, adsorb and purify air, its flame retardant properties might as well, UL94 V-0 flame retardant rating can be reached, thus the present invention has very high practical value, in automobile, electronic apparatus, mechanical component etc., have good application prospect.

Embodiment

Technical scheme of the present invention is further illustrated below in conjunction with concrete preferred embodiment.

The PC/PBT modified alloy that mineral strengthen, its component by mass percent proportioning is: PC 40%, PBT 30%, mineral filler 15%, aluminium titanium composite coupler 0.5%, fire retardant 10%, triphenyl phosphite 1.5%, ternary graft copolymer SEBS-g-GMA 2%, antioxidant 1010 0.3%, pentaerythritol stearate 0.7%.Wherein, described PC is bisphenol A-type aromatic copolycarbonate, and weight-average molecular weight is 20000 ~ 40000g/mol; Described PBT is polybutylene terephthalate, and its intrinsic viscosity is 0.8 ~ 1.2dL/g; Described mineral filler is particle diameter at 800 order ~ 1250 orders and take aluminosilicate as the zeolite powder of fundamental component, and its density is 2.1 ~ 2.2g/cm ³, the function that there is enhancing, adsorb and purify air; Described fire retardant is the polydimethylsiloxane (PDMS) of mass ratio 1:4 and the compound flame retardant of dihydroxyphenyl propane-bis-(diphenyl phosphoester) (BDP).

Preparation method: (1), by PC in blast drier at 110 DEG C ~ 130 DEG C temperature dry 3 ~ 4 hours, PBT at 130 DEG C ~ 150 DEG C dry 3 ~ 4 hours, mineral filler and fire retardant be drying 30 ~ 45 minutes at 60 DEG C ~ 85 DEG C respectively separately, stand-by; (2) take dry mineral filler and aluminium titanium composite coupler, by weight ratio, add a material temperature degree in the high-speed mixer of 80 DEG C ~ 120 DEG C, after rotating speed 3000 ~ 6000 revs/min stirs 10 ~ 60 minutes, be cooled to lower than 40 DEG C of dischargings stand-by; (3), by taking dry PBT by weight ratio, fire retardant, antioxidant 1010, pentaerythritol stearate add in high-speed mixer, after to make to stir together 3 ~ 10 minutes all mixed, discharging add in twin screw extruder carry out melt extruding, cooling granulation, and stand-by after drying; (4), the product taking dry PC and step (3) is by weight ratio added in high-speed mixer, add the product taking step (2) by weight ratio simultaneously, and add the triphenyl phosphite and ternary graft copolymer SEBS-g-GMA that take by weight ratio, after to make to stir together 3 ~ 15 minutes all mixed, discharging adds in twin screw extruder, by twin screw extruder fully plastify blended after extrude, cooling granulation, get product.

Claims

1. the PC/PBT modified alloy of a mineral enhancing, it is characterized in that, its component by mass percent proportioning is: PC 20% ~ 60%, PBT 10% ~ 40%, mineral filler 5% ~ 15%, coupling agent 0.1% ~ 0.5%, fire retardant 5% ~ 10%, triphenyl phosphite 0.1% ~ 1.5%, compatilizer 1% ~ 3%, oxidation inhibitor 0.1% ~ 0.5%, lubricant 0.1% ~ 1%.

2. the PC/PBT modified alloy that strengthens of a kind of mineral according to claim 1, is characterized in that, described mineral filler is particle diameter at 800 order ~ 1250 orders and take aluminosilicate as the zeolite powder of fundamental component.

3. the PC/PBT modified alloy of a kind of mineral enhancing according to claim 1, it is characterized in that, described coupling agent is aluminium titanium composite coupler.

4. the PC/PBT modified alloy of a kind of mineral enhancing according to claim 1, it is characterized in that, described fire retardant is the polydimethylsiloxane (PDMS) of mass ratio 1:4 and the compound flame retardant of dihydroxyphenyl propane-bis-(diphenyl phosphoester) (BDP).

5. the PC/PBT modified alloy of a kind of mineral enhancing according to claim 1, it is characterized in that, described compatilizer is ternary graft copolymer SEBS-g-GMA.

6. the PC/PBT modified alloy of a kind of mineral enhancing according to claim 1, it is characterized in that, described oxidation inhibitor is the one in antioxidant 1010, antioxidant 1076, oxidation inhibitor 2921.

7. the PC/PBT modified alloy of a kind of mineral enhancing according to claim 1, it is characterized in that, described lubricant is pentaerythritol stearate.

8. the preparation method of the PC/PBT modified alloy of a kind of mineral enhancing according to claim 1, is characterized in that, comprise the following steps: