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A kind of macromolecule compatibilizer and its preparation method and application

A compatibilizer and macromolecular technology, applied in the field of compatibilizers and their preparation, can solve the problems of poor physical and mechanical properties, large differences in solubility parameters, and inability to resist strong oxidizing acids, and achieve the effect of improving oil resistance.

Active Publication Date: 2016-03-30
ANHUI ZHONGDING SEALING PARTS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 3. Good chemical corrosion resistance, good resistance to alkali and weak acid, but not resistant to strong oxidizing acid
However, due to EPDM (δ=16(J / cm 3 ) 1 / 2 around) and NBR (δ=18-21(J / cm 3 ) 1 / 2 ) The solubility parameters of the two are quite different, and they belong to the thermodynamically incompatible system. The simple mechanical blend will show a large or even macroscopic phase separation form, and the physical and mechanical properties after vulcanization with glue are very poor.

Method used

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  • A kind of macromolecule compatibilizer and its preparation method and application
  • A kind of macromolecule compatibilizer and its preparation method and application
  • A kind of macromolecule compatibilizer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1) Blend EPDM raw rubber and peptizer BASS on a two-roll mill, and pass through at 65°C to Mooney viscosity ML 1+4 (125°C) is 21.3, that is, EPDM plasticized rubber. The prepared EPDM plastic rubber was cut into small pieces for subsequent dissolution in solvents. The amount of peptizer BASS added is 0.3% of the mass of EPDM raw rubber.

[0048] The Mooney viscosity ML of the EPDM raw rubber 1+4 (125°C) is 28, the ethylene content is 48%, and the third monomer is norbornene ENB content is 7.8%.

[0049] 2) Put 5g of EPDM plastic rubber, 25g of n-heptane and 30g of toluene into the reaction kettle, stir at 50°C until dissolved, then raise the temperature to 70°C, add 6g of monomer AN into the reaction kettle dropwise under the protection of nitrogen atmosphere, and initiate A mixed solution of 0.15 g of agent BPO and 2.5 g of solvent toluene was dropped in 10 minutes, then stirred and reacted at 70°C for 2.5 hours, and cooled to room temperature after the reaction; th...

Embodiment 2

[0053] 1) Blend EPDM raw rubber and peptizer PCTP on a two-roll mill, and pass through at 60°C to Mooney viscosity ML 1+4 (125°C) is 22.6, that is, EPDM plasticized rubber. The prepared EPDM plastic rubber was cut into small pieces for subsequent dissolution in solvents. The addition amount of peptizer PCTP is 0.2% of the mass of EPDM raw rubber.

[0054] The Mooney viscosity ML of the EPDM raw rubber 1+4 (125°C) is 28, the ethylene content is 48%, and the third monomer is norbornene ENB content is 7.8%.

[0055] 2) Add 5g of EPDM plastic rubber and 50g of solvent xylene into the reaction kettle, stir at 60°C until dissolved, then raise the temperature to 70°C, add monomer AN6g and initiator BPO0. Mixed solution of 15g and 2.5g of solvent toluene, drop it in 15 minutes, stir and react at 70°C for 3 hours after dropping, cool to room temperature after the reaction; the stirring speed during the reaction of this step is 100rpm / min;

[0056] 3) Transfer the reaction liquid ob...

Embodiment 3

[0059] 1) Blend EPDM raw rubber and peptizer BASS on a two-roll mill, and pass through at 50°C to Mooney viscosity ML 1+4 (125°C) is 23, that is, EPDM plasticized rubber. The prepared EPDM plastic rubber was cut into small pieces for subsequent dissolution in solvents. The amount of peptizer BASS added is 0.2% of the mass of EPDM raw rubber.

[0060] The Mooney viscosity ML of the EPDM raw rubber 1+4 (125°C) is 28, the ethylene content is 48%, and the third monomer is norbornene ENB content is 7.8%.

[0061] 2) Put 5g of EPDM plastic rubber, 35g of carbon tetrachloride and 25g of toluene into the reaction kettle, stir at 56°C until dissolved, then raise the temperature to 75°C, and drop 5g of monomer AN into the reaction kettle under the protection of argon atmosphere 1. A mixed solution of 0.2 g of initiator LPO and 3 g of solvent toluene, dripped in 10 minutes, stirred and reacted at 75° C. for 3 hours after the dripping, cooled to room temperature after the reaction; the...

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Abstract

The invention discloses a macromolecular compatibilizer, and a preparation method and application thereof. The structural general formula of the macromolecular compatibilizer is shown in the specification, wherein m represents the number of structural units ethylene in the molecular structure; n represents the number of structural units propylene in the molecular structure; x represents the number of structural units acrylonitrile in the molecular structure; and R is a third monomer ethylidene norbornene. The macromolecular compatibilizer has favorable compatibilization action for blending use of EPDM (ethylene-propylene-diene monomer) and NBR (nitrile-butadiene rubber). When the mass part ratio of EPDM: NBR: EPDM-g-PAN is (60-70):(40-30):(5-6), the blended rubber material forms a dynamically-stable microphase-separated multi-phase structure shape taking the EPDM as a continuous phase and the NBR as a disperse phase, so that after being vulcanized, the blended rubber material keeps excellent properties of the EPDM such as high / low temperature resistance, ozone resistance, weather resistance and aging resistance, and has favorable oil resistance.

Description

1. Technical field [0001] The present invention relates to a kind of compatibilizer and its preparation method and use, specifically a kind of compatibilizer and its preparation method used when two kinds of rubbers are blended together, mainly used in EPDM rubber and nitrile Compatibilization of rubber blends. 2. Background technology [0002] The main chain of ethylene propylene diene monomer (EPDM) is a saturated chain, there are no polar substituents in the molecular chain, and it has good flexibility. It is a saturated non-crystalline rubber with extremely high chemical stability. The molecular structure of EPDM determines that it has the following good properties: [0003] 1. Excellent aging resistance, outstanding ozone resistance, weather resistance, and high thermal stability. Generally, it can be used for a long time at 150°C and intermittently at 200°C. Low temperature resistance is also better; [0004] 2. Good medium resistance and good stability to various p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L9/02C08L51/04C08F255/06C08F220/44C08F6/12
CPCC08F255/06C08L23/16C08L2201/08C08L2205/03C08L2205/08C08L2207/02C08F220/44C08L9/02C08L51/04
Inventor 夏迎松章于川严江威李方山朱宝林吴兵张海潮陈晋阳杨兆苇
Owner ANHUI ZHONGDING SEALING PARTS
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