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Preparation of a macromolecular compatibilizer for rubber and its application in acrylate rubber/nitrile rubber alloy elastomer

A technology of acrylate and nitrile rubber, which is used in the application of acrylate rubber/nitrile rubber alloy elastomers, and the preparation of rubber with macromolecular compatibilizers, which can solve the problem that the mechanical properties of vulcanizates cannot be reached and cannot be formed. Interpenetrating cross-linked network IPN and other issues, to achieve the effect of excellent oil resistance, simple and easy operation, and excellent heat aging performance

Active Publication Date: 2022-02-25
ANHUI UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the vulcanization systems of ACM and NBR are different. If the respective vulcanization speeds cannot be adjusted to better synchronous vulcanization, the interpenetrating cross-linked network IPN that enhances the interfacial bonding force of the two phases cannot be formed between the two phases. And the mechanical properties of vulcanized rubber can not achieve the expected effect

Method used

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  • Preparation of a macromolecular compatibilizer for rubber and its application in acrylate rubber/nitrile rubber alloy elastomer
  • Preparation of a macromolecular compatibilizer for rubber and its application in acrylate rubber/nitrile rubber alloy elastomer
  • Preparation of a macromolecular compatibilizer for rubber and its application in acrylate rubber/nitrile rubber alloy elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The raw materials in this experimental example are: ACM masterbatch formula (mass fraction): ACM raw rubber 100, stearic acid SA 2, antioxidant 445 3, release agent 935P 3, anti-scorch agent PVT 0.5, high wear-resistant carbon black N55050, curing agent HMDC1.2, accelerator XL-602.

[0033] NBR masterbatch formula (mass fraction): NBR raw rubber 100, zinc oxide ZnO 5, stearic acid SA 2, antioxidant RD1, antioxidant 4010NA 1, plasticizer DOP 10, accelerator NOBS 1.1, accelerator DM 1.1 , Accelerator DTDM 1.1.

[0034] ACM raw rubber and NBR (acrylonitrile content 25%-41%) raw rubber are used together in the ratio of ACM / NBR=80 / 20.

[0035] This example is a blend of ACM and NBR without adding a compatibilizer. The specific implementation steps are as follows:

[0036] (1) Add ACM raw rubber into the open mill, adjust the roll distance to 1mm, add various small materials of acrylic rubber after wrapping the rolls, and finally add vulcanizing agent and vulcanizing aid, a...

Embodiment 2

[0041] The raw material of macromolecule compatibilizer in the present embodiment consists of: 100 mass parts of epoxy-type acrylate rubber, 25 mass parts of carboxyl-terminated nitrile rubber (CN-25), plasticizer A dibutyl terephthalate 5 parts by mass, catalyst B octadecyldimethyl tertiary amine 0.63 parts by mass.

[0042] The preparation method of macromolecule compatibilizer in the present embodiment is as follows:

[0043] 1. Add the weighed epoxy acrylate rubber (ACM-EPG) masticate and plasticizer A into the internal mixer respectively, start the rotor to mix, and then add the measured amount of liquid carboxyl-terminated butyl at 40-50°C Nitrile rubber (LX-NBR), under the rotation of the rotor, slowly raise the temperature to 70-80°C and continue to knead evenly, then gradually raise the temperature to 90-110°C and speed up the speed to obtain the mixed rubber material M;

[0044] 2. Add tertiary amine catalyst B to the mixture M obtained in step 1, continue to heat u...

Embodiment 3

[0049] The raw material of macromolecule compatibilizer in the present embodiment is constituted as: epoxidized acrylate rubber 100 mass parts, carboxyl-terminated nitrile rubber (CN-15) 25 mass parts, plasticizer A dibutyl terephthalate 5 parts by mass, catalyst B octadecyldimethyl tertiary amine 0.63 parts by mass.

[0050] The preparation method of macromolecule compatibilizer in the present embodiment is as follows:

[0051] 1. Add the weighed epoxy acrylate rubber (ACM-EPG) masticate and plasticizer A into the internal mixer respectively, start the rotor to mix, and then add the measured amount of liquid carboxyl-terminated butyl at 40-50°C Nitrile rubber (LX-NBR), under the rotation of the rotor, slowly raise the temperature to 70-80°C and continue to knead evenly, then gradually raise the temperature to 90-110°C and speed up the speed to obtain the mixed rubber material M;

[0052] 2. Add tertiary amine catalyst B to the mixture M obtained in step 1, continue to heat u...

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Abstract

The invention discloses the preparation of a macromolecular compatibilizer for rubber and its application in acrylate rubber / nitrile rubber alloy elastic body, wherein the macromolecular compatibilizer for rubber is epoxy-type acrylate rubber, liquid Carboxyl-terminated nitrile rubber, plasticizer A, and catalyst B are blended in an internal mixer, and catalyst B promotes the epoxy group on the side group of the ACM-EPG molecular chain and the active H of the carboxyl-terminal end of the LX-NBR macromolecular chain at a certain temperature. A ring-opening addition reaction occurs, and in situ grafting generates (ACM‑EPG)‑g‑(LX‑NBR) non-reactive compatibilizer. The macromolecular compatibilizer of the present invention can be added as a compatibilizer when acrylate rubber and nitrile rubber are blended and used, which can significantly strengthen the interfacial bonding force of the two phases, and strengthen the dynamic compatibility between acrylate rubber and nitrile rubber. Significantly improve the mechanical properties of acrylate rubber / nitrile rubber alloy elastomers and their synergistic effects.

Description

technical field [0001] The invention relates to a compatibilizer of a polymer alloy elastic body and a preparation method thereof, in particular to the preparation of a macromolecule compatibilizer for rubber and its application in an acrylic ester rubber / nitrile rubber alloy elastic body. The macromolecule compatibilizer of the present invention adopts epoxy-type acrylate rubber (ACM-EPG) of low Mooney viscosity to be prepared through the reaction synthesis of in-situ grafted liquid carboxyl nitrile rubber (LX-NBR). It can be recorded as (ACM-EPG)-g-(LX-NBR). Background technique [0002] ACM refers to the acrylate rubber prepared by free radical copolymerization with acrylate as the main monomer and a small amount of monomer with vulcanizable reactive functional groups. It is a special synthetic rubber; while AEM refers to the acrylate rubber. Acrylate rubber obtained by copolymerizing with ethylene as the main monomer and a small amount of monomers with vulcanizable reac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/02C08L33/04C08L13/00C08L87/00
CPCC08G81/021C08L33/04C08L2205/08C08L2205/03C08L13/00C08L87/005
Inventor 夏茹卢佳豪钱家盛章于川吴兵李方山陈鹏方胜阳杨斌沈剑王宇琛汪雪朝
Owner ANHUI UNIVERSITY
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