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Macromolecular compatibilizer, and preparation method and application thereof

A technology of compatibilizer and macromolecule, which is applied in the field of compatibilizer and its preparation, can solve the problems of poor physical and mechanical properties, intolerance to strong oxidizing acid, and large difference in solubility parameters, etc., and achieve the effect of improving oil resistance

Active Publication Date: 2014-04-09
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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  • Macromolecular compatibilizer, and preparation method and application thereof
  • Macromolecular compatibilizer, and preparation method and application thereof
  • Macromolecular compatibilizer, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] 1) Blend the EPDM raw rubber and the peptizer BASS on a two-roll mill, and pass to the Mooney viscosity ML at 65°C 1+4 (125℃) is 21.3, that is, EPDM plastic compound is obtained. Cut the prepared EPDM masticated rubber into small pieces to facilitate subsequent dissolution in the solvent. The addition amount of the peptizer BASS is 0.3% of the mass of the EPDM raw rubber.

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

[0049] 2) Put 5g of EPDM plastic compound, 25g of n-heptane and 30g of toluene into the reactor, stir at 50℃ to dissolve, then heat up to 70℃, add monomer AN6g dropwise to the reactor under the protection of nitrogen atmosphere, start A mixed solution of 0.15g BPO and 2.5g of solvent toluene, drip in 10 minutes, stir and react for 2.5h at 70°C after dripping, and cool to room temperature after the reaction; the stirring speed during the reaction in this s...

Embodiment 2

[0053] 1) Blend EPDM raw rubber and peptizer PCTP on a two-roll mill, and pass to Mooney viscosity ML at 60℃ 1+4 (125℃) is 22.6, that is, EPDM plastic compound is obtained. Cut the prepared EPDM masticated rubber into small pieces to facilitate subsequent dissolution in the solvent. The addition amount of peptizer PCTP is 0.2% of the mass of EPDM raw rubber.

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

[0055] 2) Put 5g of EPDM plastic compound and 50g of solvent xylene into the reactor, stir at 60℃ to dissolve, then heat to 70℃, and add monomer AN6g and initiator BPO0 to the reactor under the protection of nitrogen atmosphere. The mixed solution of 15g and 2.5g of solvent toluene was dripped in 15min. After dripping, the reaction was stirred at 70°C for 3h. After the reaction, it was cooled to room temperature; the stirring speed during the reaction in this step was 100rpm / ...

Embodiment 3

[0059] 1) Blend the EPDM raw rubber and the peptizer BASS on a two-roll mill, and pass to the Mooney viscosity ML at 50°C 1+4 (125℃) is 23, that is, EPDM plastic compound is obtained. Cut the prepared EPDM masticated rubber into small pieces to facilitate subsequent dissolution in the solvent. The addition amount of the peptizer BASS is 0.2% of the mass of EPDM raw rubber.

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

[0061] 2) Put 5g of EPDM plastic compound, 35g of carbon tetrachloride and 25g of toluene into the reactor, stir at 56℃ to dissolve, then heat to 75℃, and add monomer AN5g dropwise to the reactor under the protection of argon atmosphere , A mixed solution of 0.2g initiator LPO and 3g solvent toluene, dripping in 10min, stir and react at 75°C for 3h after dripping, and cool to room temperature after the reaction; the stirring speed during the reaction in this s...

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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 compatibilizer and its preparation method and application, in particular to a compatibilizer used in the blending of two rubbers and its preparation method, mainly used for EPDM rubber and nitrile The blending and compatibilization of rubber. 2. Background technology [0002] The main chain of EPDM is a saturated chain with no polar substituents in the molecular chain. It has good flexibility and is a saturated amorphous 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 used at 200°C. Low temperature resistance is also better; [0004] 2. Good medium resistance, and good stability to various polar chemicals; [0005] 3. It has excellent electrical insulati...

Claims

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Application Information

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Patent Type & Authority Applications(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