CN108017894A

CN108017894A - A kind of PC alloys of high-low temperature resistant hydrolysis and preparation method thereof

Info

Publication number: CN108017894A
Application number: CN201711228147.6A
Authority: CN
Inventors: 魏敬东; 宋钰; 黄浩; 周勇军
Original assignee: Hefei Harmony New Materials Co Ltd
Current assignee: Hefei Harmony New Materials Co Ltd
Priority date: 2017-11-29
Filing date: 2017-11-29
Publication date: 2018-05-11
Anticipated expiration: 2037-11-29
Also published as: CN108017894B

Abstract

The invention discloses a kind of makrolon of high-low temperature resistant hydrolysis（PC）Alloy, the material include mass fraction as 50% 94.7% PC, 5% 45% thermoplastic polyurethane elastomer（TPU）, hydrolysis agent 0.3 ~ 5%.PC alloys prepared by the present invention have good mechanical property, solvent resistant and high and low temperature resistance, especially with excellent anti-hydrolytic performance.

Description

A kind of PC alloys of high-low temperature resistant hydrolysis and preparation method thereof

Technical field

The present invention relates to materials science field, more particularly to a kind of high molecular material of high-low temperature resistant hydrolysis and its preparation Method.

Background technology

Makrolon (Polycarbonate, PC) is a kind of common amorphous engineering plastics, has outstanding mechanical property Energy and optical property, high tenacity, high transparency, stable molding, high temperature resistant, are widely used in engineering, automobile, household electrical appliances, electricity Each field such as sub- electrician.Thermoplastic polyurethane elastomer (Thermoplastic Polyurethane, TPU), can be divided into poly- Ester type TPU and polyether-type TPU.Polyester-type TPU has good a mechanical property and solvent resistance, and with makrolon have compared with Good compatibility, but hydrolytic resistance is weak；Polyether-type TPU has a good low temperature resistant anti-hydrolytic performance, but with the phase of makrolon Capacitive is poor.PC alloys are more at present is blended with polyester-type TPU and PC, can obtain preferable mechanical property and resistance to low temperature, But anti-hydrolytic performance is not good enough.Polyether-type TPU and PC blending can obtain the preferable alloy of anti-hydrolytic performance, but polyether-type TPU with PC compatibilities are poor, and alloy property stablizes weaker, polyether-type TPU higher prices, therefore using the relatively low polyester-type of price in addition TPU is modified PC, the PC alloys for obtaining good resistant of high or low temperature, chemically-resistant solvent and hydrolytic resistance be in industry always Wish to solve the problems, such as.

The content of the invention

The present invention provides a kind of PC alloys of high-low temperature resistant hydrolysis and preparation method thereof, PC alloys possess outstanding machine Tool performance, solvent resistant and high and low temperature resistance, especially possess excellent anti-hydrolytic performance, which is readily produced and processes, and Heat endurance is good.

The technical solution that the present invention uses is：

A kind of PC alloys of high-low temperature resistant hydrolysis, are made of the component of following mass fraction：

PC 50%-94.7%

TPU 5%-45%

Hydrolysis agent 0.3%-5%

The PC is bisphenol A polycarbonate of the weight average molecular weight between 12000-30000, wherein it is preferred that Weight-average molecular Amount is between 20000-30000.

The TPU is the polyester-type thermoplastic polyurethane elastomer between shore hardness is 65A-72D, preferably shore hardness For 65-85A.

The hydrolysis agent includes carbodiimide and acrylonitrile styrene methacrylic acid ethylene oxidic ester terpolymer Compounding mixture.Carbodiimides and acrylonitrile styrene methacrylic acid ethylene oxidic ester in hydrolysis agent compounding mixture Terpolymer can be mixed with arbitrary proportion and compounded, and preferably carbodiimides mass ratio is 10~20%, acrylonitrile styrene Glycidyl methacrylate mass ratio in glycidyl methacrylate terpolymer can be arbitrary proportion, Preferred mass ratio is 1~10%.

The preparation method of PC alloys of the present invention is：

Raw material drying processing：PC raw materials are placed in 120 DEG C of drying ovens and dry 4-6h, TPU raw materials are placed in 80 DEG C does 2-4h in dry baking oven.

Precise each component quality, and the packet after the completion of weighing is sufficiently mixed uniformly.

Material after mixing is added in double screw extruder and is granulated, extruder technological parameter, feeding section 190- 230 DEG C, 220-240 DEG C of compression section, 210-230 DEG C of metering section, 230 DEG C of head, screw speed 350-450r/min.

The beneficial effects of the present invention are：

PC alloying technologys of the present invention are simple, are readily produced, and have a good mechanical performance, high and low temperature resistance, Especially there is excellent anti-hydrolytic performance, available for each based article of injection molding.

Embodiment

In conjunction with specific PC formulas, the invention will be further described with preparation method example.

PC resin selected by example dissolves the PC IR2200 of light for platform, and the bisphenol A-type that weight average molecular weight is 22000 or so gathers Carbonic ester.

TPU selected by example be Yantai Wanhua WHT1180, the polyester-type thermoplastic polyurethane elastomer of shore hardness 80A.

The XP 2802 that carbodiimides selected by example is created for Cohan, acrylonitrile styrene methacrylic acid glycidol Ester terpolymer is the SAG-005 of the liter of day.

Hydrolysis agent 1 selected by example is 10% carbodiimides of mass ratio and 90% acrylonitrile styrene methacrylic acid The compounding mixture of ethylene oxidic ester terpolymer.

Hydrolysis agent 2 selected by example is 20% carbodiimides of mass ratio and 80% acrylonitrile styrene methacrylic acid The compounding mixture of ethylene oxidic ester terpolymer.

Hydrolysis agent 3 selected by comparative example is acrylonitrile styrene methacrylic acid ethylene oxidic ester terpolymer SAG- 005。

Hydrolysis agent 4 selected by comparative example is carbodiimides XP 2802.

Preparation method used in example：

Precise each component quality, by the packet drying after the completion of weighing and is sufficiently mixed uniformly.Will after mixing Material be added in double screw extruder be granulated processing, extruder technological parameter, 190-230 DEG C of feeding section temperature, compression section 220-240 DEG C of temperature, 210-230 DEG C of metering section temperature, 230 DEG C of head temperature, screw speed 350-450r/min..

Analysis test method：

Material is placed in drying process 2-4h in 80 DEG C of drying ovens, after according to GB standard be molded sample preparation, constant temperature processing After test its mechanical property；

Wherein tensile property is tested according to GB/T1040 standard methods；

Bending property is tested according to GB/T9341 methods；

Notched impact properties is tested according to GB/T1843 standard methods；

The processing of cryogenic property batten：Batten is placed in -30 DEG C of cryogenic box freezing 4h, and completes to survey in 10 seconds after taking-up Examination.

The processing of anti-hydrolytic performance batten：According to the standard of UL746C F1, batten is placed in 70 DEG C of hot water and hydrolyzes 168h, Constant temperature is tested after drying processing.

With hydrolysis agent 1 for embodiment, it is as shown in table 1 for the formula and test result of comparative example with hydrolysis agent 3：

Table 1

With hydrolysis agent 2 for embodiment, it is as shown in table 2 for the formula and test result of comparative example with hydrolysis agent 4：

Table 2

Formula and the test result for contrasting different hydrolysis agents are as shown in table 3：

Table 3

As can be seen from Table 1 and Table 2, the PC alloys of polyester-type thermoplastic polyurethane elastomer and polycarbonate blending have Good mechanical property, heat resistance and low-temperature flexibility, but anti-hydrolytic performance is poor, and the addition of hydrolysis agent has been obviously improved material The anti-hydrolytic performance of material, while mechanical property and high and low temperature resistance are also improved, and within the specific limits, with water-fast The increase of agent content is solved, the impact strength after material boiling is substantially improved；But during hydrolysis agent adding too much, the mechanics of material Performance has a declining tendency on the contrary, and illustrating the additive amount of hydrolysis agent, there are a suitable proportion, excessive hydrolysis Agent causes material property to be affected on the contrary because activity group content is superfluous.From table 3 it can be seen that single carbonization two is sub- Amine or acrylonitrile styrene methacrylic acid ethylene oxidic ester terpolymer cannot all play alloy good hydrolysis effect Fruit.Therefore, the compounding hydrolysis agent and its content play key work with the anti-hydrolytic performance and mechanical property for comparing PC alloys With.

Above example is only to illustrate the preferred embodiments lifted of spirit of the present invention, is not intended to limit the invention, it is all The improvement and modification made in the spirit and principles in the present invention category, all should be within protection scope of the present invention.

Claims

1. a kind of PC alloys of high-low temperature resistant hydrolysis, it is characterised in that be made of following mass fraction proportioning：

PC 50%-94.7%,

TPU 5%-45%,

Hydrolysis agent 0.3-5%.

2. the PC alloys of high-low temperature resistant hydrolysis according to claim 1, it is characterised in that：The PC gathers for bisphenol A-type Carbonic ester.

3. the PC alloys of high-low temperature resistant hydrolysis according to claim 2, it is characterised in that：The PC is weight average molecular weight Between 12000-30000.

4. the PC alloys of high-low temperature resistant hydrolysis according to claim 1, it is characterised in that：The TPU is polyester-type heat Plastic polyurethane elastomer.

5. the PC alloys of high-low temperature resistant hydrolysis according to claim 4, it is characterised in that：The shore hardness of the TPU Between 65A-72D.

6. the PC alloys of high-low temperature resistant hydrolysis according to claim 1, it is characterised in that：The hydrolysis agent is bag Compounding mixture containing carbodiimides and acrylonitrile styrene methacrylic acid ethylene oxidic ester terpolymer.

7. the PC alloys of high-low temperature resistant hydrolysis according to claim 6, it is characterised in that：The hydrolysis agent compounding is mixed The mass ratio of carbodiimides is 10 ~ 20% in compound.

8. the PC alloys of high-low temperature resistant hydrolysis according to claim 6, it is characterised in that：The hydrolysis agent compounding is mixed The matter of glycidyl methacrylate in compound in acrylonitrile styrene methacrylic acid ethylene oxidic ester terpolymer Amount ratio is 1 ~ 10%.

A kind of 9. preparation method of the PC alloys of any one of claim 1-8 high-low temperature resistant hydrolysis, it is characterised in that：It is accurate PC, TPU, hydrolysis agent are really weighed, drying is simultaneously sufficiently mixed uniformly, then is blended and is granulated by double screw extruder.