CN104650557A

CN104650557A - Elastomer coated inorganic powder filled modified PC/PBT composite material

Info

Publication number: CN104650557A
Application number: CN201310596998.1A
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: 2013-11-25
Filing date: 2013-11-25
Publication date: 2015-05-27

Abstract

The invention discloses an elastomer coated inorganic powder filled modified PC/PBT composite material. The material comprises, by mass percentage, 20%-60% of PC, 20%-60% of PBT, 0.1%-1% of triphenyl phosphite, 5%-15% of inorganic powder, 1%-2% of diisocyanate, 2%-4% of butylene glycol, 0.5%-3% of a compatilizer, 0.5%-2% of a stabilizer, 0.1%-0.5% of a composite antioxidant, and 0.1%-1% of a lubricant. According to the invention, in situ polymerization is employed to generate a polyurethane elastomer and the inorganic powder surface is coated to form a core-shell structure with the inorganic powder as the core and the elastomer as the shell, the core and the shell can play their respective advantages and reach good synergistic reinforcing and toughening effects on the PC/PBT composite material, also the adding of the triphenyl phosphate can well control the ester exchange reaction between PC and PBT, and by adding an appropriate amount of the stabilizer, the composite antioxidant, the lubricant and the like, the ageing resistance, processability and thermal stability of the PC/PBT system can be greatly improved. Thus, the PC/PBT composite material provided by the invention has good comprehensive performance and wide application prospect.

Description

The powder filling-modified PC/PBT matrix material of elastomer coated inorganic

Technical field

The present invention relates to technical field of polymer materials, specifically the powder filling-modified PC/PBT matrix material of a kind of elastomer coated inorganic.

Background technology

Polycarbonate (PC)/polybutylene terephthalate (PBT) matrix material 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 matrix material further, often needing to introduce a small amount of three components, being intended to the PC/PBT matrix material obtaining having much practical value.Along with the expansion of PC/PBT matrix material range of application, PC/PET is proposed to the requirement of functionalization, high performance, especially in enhancing, toughness reinforcing and consistency etc.Prior art adopts elastic body toughening can increase substantially the shock resistance of PC/PBT matrix material, but also causes the degradation of its intensity, rigidity, thermotolerance and processing characteristics simultaneously; When employing rigid inorganic filler toughening shows toughen and intensify simultaneously under certain condition, but the increase rate of toughness is limited; When employing elastomerics, the blended meeting of inorganic rigid particle make the effect of two kinds of materials influence each other, thus make the mechanical property of PC/PBT matrix material can not get expected effect.

Summary of the invention

The object of the present invention is to provide the powder filling-modified PC/PBT matrix material of elastomer coated inorganic that a kind of excellent in mechanical performance, ageing resistance are strong, thermostability is high.

The technical solution adopted for the present invention to solve the technical problems is: the powder filling-modified PC/PBT matrix material of elastomer coated inorganic, and its component by mass percent proportioning is: PC 20% ~ 60%, PBT 20% ~ 60%, triphenyl phosphite 0.1% ~ 1%, inorganic powder 5% ~ 15%, vulcabond 1% ~ 2%, butyleneglycol 2% ~ 4%, compatilizer 0.5% ~ 3%, stablizer 0.5% ~ 2%, composite antioxidant 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.

Described inorganic powder is particle diameter water-ground limestone, calcium oxide, talcum powder, the one in silicon-dioxide of 0.5 μm ~ 20 μm.

Described compatilizer is ethylene-methyl acrylate-glyceryl methacrylate multipolymer.

Described stablizer is hindered amine light stabilizer GW-944Z.

Described composite antioxidant is Hinered phenols antioxidant 1010 and the compound of phosphite ester kind antioxidant 168 1:2 in mass ratio.

Described lubricant is pentaerythritol stearate (PETS).

The preparation method of the powder filling-modified PC/PBT matrix material of above-mentioned elastomer coated inorganic, 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, inorganic powder at 60 DEG C ~ 80 DEG C dry 30 ~ 45 minutes, stand-by;

(2), to take dried inorganic powder by weight ratio, to add barrel temperature be in 40 DEG C ~ 70 DEG C mixing machines, add the butyleneglycol taken by weight ratio simultaneously, make stirring at low speed 5 ~ 15 minutes together, add vulcabond again, and high-speed stirring 10 ~ 60 minutes, make abundant addition polymerization and coated inorganic powder, then add again in high-speed mixer and take dried PC by weight ratio, PBT, and add the triphenyl phosphite claimed by weight ratio, compatilizer, stablizer, composite antioxidant, lubricant, continue stirring 5 ~ 15 minutes, make fully to mix rear discharging, stand-by,

(3), the compound of step (2) is added in twin screw extruder, extrudes after melt blending at 230 DEG C ~ 270 DEG C, cooling granulation, get product.

The invention has the beneficial effects as follows, compared with prior art, the present invention adopts in-situ polymerization to generate polyurethane elastomer coated at inorganic powder surface, being formed with inorganic powder is core, elastomerics is the nucleocapsid structure of shell, make it play respective advantage and good collaborative activeness and quietness effect is played to PC/PBT matrix material, and transesterification reaction can be there is between control PC and PBT well in adding of triphenyl phosphite, add appropriate stablizer, composite antioxidant and lubricant etc. can improve the ageing resistance of PC/PBT system greatly, processing characteristics and thermal stability, thus there is good over-all properties and wide application prospect.

Embodiment

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

The powder filling-modified PC/PBT matrix material of a kind of elastomer coated inorganic, its component by mass percent proportioning is: PC 40%, PBT 37%, triphenyl phosphite 1%, particle diameter 0.5 μm ~ 20 μm water-ground limestone 10%, vulcabond 2%, butyleneglycol 4%, ethylene-methyl acrylate-glyceryl methacrylate multipolymer 3%, hindered amine light stabilizer GW-944Z 2%, Hinered phenols antioxidant 1010 and phosphite ester kind antioxidant 168 1:2 in mass ratio compound 0.3%, pentaerythritol stearate (PETS) 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.

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, particle diameter was the water-ground limestone of 0.5 μm ~ 20 μm at 60 DEG C ~ 80 DEG C dry 30 ~ 45 minutes, stand-by, (2), by taking the water-ground limestone of dried particle diameter at 0.5 μm ~ 20 μm by weight ratio, to add barrel temperature be in 40 DEG C ~ 70 DEG C mixing machines, add the butyleneglycol taken by weight ratio simultaneously, make stirring at low speed 5 ~ 15 minutes together, add vulcabond again, and high-speed stirring 10 ~ 60 minutes, make abundant addition polymerization and coated water-ground limestone, then add again in high-speed mixer and take dried PC by weight ratio, PBT, and add the triphenyl phosphite claimed by weight ratio, ethylene-methyl acrylate-glyceryl methacrylate multipolymer, hindered amine light stabilizer GW-944Z, the compound of Hinered phenols antioxidant 1010 and phosphite ester kind antioxidant 168 1:2 in mass ratio, pentaerythritol stearate (PETS), continue stirring 5 ~ 15 minutes, make fully to mix rear discharging, stand-by, (3), the compound of step (2) is added in twin screw extruder, extrudes after melt blending at 230 DEG C ~ 270 DEG C, cooling granulation, get product.

Claims

1. the powder filling-modified PC/PBT matrix material of elastomer coated inorganic, it is characterized in that, its component by mass percent proportioning is: PC 20% ~ 60%, PBT 20% ~ 60%, triphenyl phosphite 0.1% ~ 1%, inorganic powder 5% ~ 15%, vulcabond 1% ~ 2%, butyleneglycol 2% ~ 4%, compatilizer 0.5% ~ 3%, stablizer 0.5% ~ 2%, composite antioxidant 0.1% ~ 0.5%, lubricant 0.1% ~ 1%.

2. the powder filling-modified PC/PBT matrix material of elastomer coated inorganic according to claim 1, is characterized in that, described inorganic powder is particle diameter water-ground limestone, calcium oxide, talcum powder, the one in silicon-dioxide of 0.5 μm ~ 20 μm.

3. the powder filling-modified PC/PBT matrix material of elastomer coated inorganic according to claim 1, is characterized in that, described compatilizer is ethylene-methyl acrylate-glyceryl methacrylate multipolymer.

4. the powder filling-modified PC/PBT matrix material of elastomer coated inorganic according to claim 1, is characterized in that, described stablizer is hindered amine light stabilizer GW-944Z.

5. the preparation method of the powder filling-modified PC/PBT matrix material of elastomer coated inorganic according to claim 1, is characterized in that, comprise the following steps: