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A kind of modified hydrogenated nitrile rubber material and its preparation method and application

A hydrogenated nitrile rubber and modified technology, applied in the rubber field, can solve the problems of low temperature resistance and oil resistance, mechanical properties are difficult to combine, reduce oil resistance and mechanical properties, etc. Wide, damping performance improvement effect

Active Publication Date: 2022-02-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the introduction of flexible side groups or the copolymerization of the third monomer, although the low temperature resistance performance has been improved, its oil resistance and mechanical properties may be reduced to a certain extent, and its low temperature resistance, oil resistance and mechanical properties are difficult to balance. Tool

Method used

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  • A kind of modified hydrogenated nitrile rubber material and its preparation method and application
  • A kind of modified hydrogenated nitrile rubber material and its preparation method and application
  • A kind of modified hydrogenated nitrile rubber material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The present embodiment provides a kind of preparation method of HNBR / PNB block copolymer, as follows:

[0038] (1) get acrylonitrile content 33wt%, the hydrogenated nitrile butadiene rubber of degree of hydrogenation 92% is dissolved in chlorobenzene, is configured into the hydrogenated nitrile butadiene glue that mass concentration is 10%;

[0039] (2) Get 200g glue solution mass concentration and be 10% hydrogenated nitrile butadiene rubber (conversion is 20g) be placed in the 500ml three-necked flask, weigh 2g norbornene monomer (mass fraction 10%) and add in the hydrogenated nitrile butadiene glue solution , then add Grubbs I catalyst to the mixed glue, stir, and react at 50°C for 8h;

[0040] The mole amount of the Grubbs I generation catalyst is 0.025% of the sum of the double bond moles in the reactants.

[0041] (3) Slowly add the product into ethanol, wash the precipitate, put it in a vacuum oven and dry it to constant weight to obtain the product.

[0042] The...

Embodiment 2～8

[0044] Compared with Example 1, the difference is that the addition amount of norbornene monomer is different, which are respectively 20%, 30%, 40%, 50%, 60%, 80%, and 100% of the mass of hydrogenated nitrile rubber.

[0045] figure 1 It is the nuclear magnetic spectrum of gained HNBR / PNB block copolymer.

[0046] Calculate the chain segment ratio of hydrogenated nitrile butadiene rubber and polynorbornene in the chain segment of gained HNBR / PNB block copolymer according to nuclear magnetic spectrum, as shown in table 1:

[0047] Table 1

[0048] Hydrogenated nitrile rubber segment content (%) Polynorbornene segment content (%) Example 1 (10%) 87 13 Example 2 (20%) 75 25 Example 3 (30%) 68 32 Example 4 (40%) 50 50 Example 5 (50%) 44 56 Example 6 (60%) 42 58 Example 7 (80%) 35 65 Example 8 (100%) 44 56

[0049] As can be seen from Table 1, along with the addition ratio of norbornene monomer increases, p...

Embodiment 9～14

[0051] This embodiment provides a method for preparing a modified hydrogenated nitrile rubber material resistant to low temperature and high damping, including:

[0052] Get respectively with embodiment 1 (10%), embodiment 2 (20%), embodiment 4 (40%), embodiment 6 (60%), embodiment 7 (80%), embodiment 8 (100%) Each 100 parts of the HNBR / PNB block copolymer obtained in the above-mentioned method is respectively configured with 60 parts of naphthenic oil, 40 parts of carbon black N330, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant 445, and 1.5 parts of sulfur. Add 0.6 parts of accelerator NS into the internal mixer for mixing; use a flat vulcanizer to vulcanize the mixed rubber at 160 ° C and 10 MPa for 10 to 25 minutes to obtain the product.

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Abstract

The invention belongs to the technical field of rubber, and in particular relates to a modified hydrogenated nitrile rubber material with the characteristics of low temperature resistance and high damping, as well as its preparation method and application. The modified hydrogenated nitrile butadiene rubber material is prepared from HNBR / PNB block copolymer as a raw material; the HNBR / PNB block copolymer uses norbornene monomer as a modifying agent, through olefin metathesis reaction to NBR Or modified by HNBR. The resulting block copolymer has both the performance characteristics of HNBR and PNB, not only maintaining the basic properties of hydrogenated nitrile rubber, but also using polynorbornene to absorb a large amount of plasticizing oil, and then obtaining an improved low temperature resistant performance. permanent hydrogenated nitrile rubber material. At the same time, the damping performance of the obtained modified HNBR material is also significantly improved due to the cyclic structure of polynorbornene.

Description

technical field [0001] The invention belongs to the technical field of rubber, and in particular relates to a modified hydrogenated nitrile rubber material with the characteristics of low temperature resistance and high damping, as well as its preparation method and application. Background technique [0002] Hydrogenated nitrile rubber (referred to as HNBR) is prepared by selective hydrogenation of carbon-carbon double bonds in nitrile rubber. Therefore, HNBR not only retains the oil resistance, corrosion resistance and elasticity of NBR, but also exhibits superior aging resistance. And high temperature resistance, and mechanical properties such as tensile strength, elongation at break, wear resistance and hardness have been improved, even in extremely harsh environments, HNBR can still retain good mechanical properties. [0003] Although the hydrogenation of the carbon-carbon double bond endows HNBR with excellent performance, it also brings a serious defect to the HNBR mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G61/08C08L87/00C08L91/00C08K13/02C08K3/04C08K3/22C08K5/09C08K3/06
CPCC08G61/08C08L87/005C08K2003/2296C08G2261/418C08G2261/126C08G2261/3324C08L91/00C08K13/02C08K3/04C08K3/22C08K5/09C08K3/06
Inventor 岳冬梅贾曼曼徐蒽云张嘉桐张立群
Owner BEIJING UNIV OF CHEM TECH
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