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Acrylonitrile butadiene and polypropylene thermoplastic crosslinked rubber

A thermoplastic vulcanizate and nitrile rubber technology, which is applied in the field of nitrile rubber and polypropylene blended thermoplastic vulcanizates, can solve the problems that have not yet been seen, and achieve the inversion of the phase state and the particle size of the dispersed phase. Control, excellent high temperature resistance, small effect of volatilization loss

Active Publication Date: 2008-06-25
SHANDONG DAWN POLYMER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Benzoate plasticizers represented by trioctyl trimellitate and epoxy plasticizers represented by epoxidized soybean oil have not been reported for use in NBR / PP TPV

Method used

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  • Acrylonitrile butadiene and polypropylene thermoplastic crosslinked rubber
  • Acrylonitrile butadiene and polypropylene thermoplastic crosslinked rubber
  • Acrylonitrile butadiene and polypropylene thermoplastic crosslinked rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A 70 / 30 NBR-PP blend thermoplastic vulcanizate was prepared. Wherein, the content of nitrile rubber combined with acrylonitrile is 41% (mass percentage), and the Mooney viscosity is (ML1+4(100°C))59. Polypropylene is homopolypropylene with an isotacticity of 98%. The dosage of main plasticizer TOTM is 40 parts. The operation steps are as follows:

[0032] 70g nitrile rubber, 2g anti-aging agent RD and 5g compatibilizer B-terminal amine-based liquid nitrile rubber are mixed uniformly on a normal temperature open mill, and then it is grafted with 30g polypropylene, 10g compatibilizer A maleic anhydride Propylene and 0.3 g of antioxidant 1010 were put into a 180° C. double-roll mill and mixed evenly. After 5 minutes, add 9g vulcanizing agent t-octyl phenolic resin and 40g main plasticizer TOTM, and finally add 1.8g accelerator stannous chloride for dynamic vulcanization for 10 minutes. Compress and form on a flat vulcanizer to obtain a blended thermoplastic vulcanizate...

Embodiment 2

[0034] A 70 / 30 NBR-PP blend thermoplastic vulcanizate was prepared. The difference from Example 1 is that the amount of the main plasticizer TOTM is changed to 50 g and the auxiliary plasticizer ESO 10 g is added, and the operation steps are the same as in Example 1. The physical and mechanical properties of TPV are shown in Table 1, and the rheological properties are shown in Table 1. figure 2 .

Embodiment 3

[0036] A 70 / 30 NBR-PP blend thermoplastic vulcanizate was prepared. The difference from Example 2 is that the amount of the auxiliary plasticizer ESO added becomes 20 g, and the operation steps are the same as in Example 2. The physical and mechanical properties of TPV are shown in Table 1, and the rheological properties are shown in Table 1. figure 2 .

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Abstract

This invention relates to an acrylonitrile butadiene and polypropylene thermoplastic sulfur rubber, in which the plasticizer applies primary plasticizer or combination of primary and co-plasticizer, wherein the primary plasticizer is trimellitic tricaprylate, and the co-plasticizer is epoxy soybean oil. The main composition and mass share of the thermoplastic sulfur rubber are as follows: acrylonitrile butadiene 60-75, polypropylene 40-25, compatible agent A: maleic anhydride graft polypropylene 10, compatible B: end-amido liquid acrylonitrile butadiene 5, primary plasticizer: trimellitic tricaprylate 30-50, co-plasticizer: epoxy soybean oil 0-20, curing agent 7-10, and accelerant 1-2. This invented thermoplastic sulfur rubber has a hardness(Shao's) 58A-80A, an oil resistant quality rate of change 0.64%-6.3%, and a tensile strength 3.6%-12.8%, with characteristics of low hardness, high oil resistance and good flowability.

Description

technical field [0001] The invention relates to a nitrile rubber and polypropylene blended thermoplastic vulcanizate, in particular to improving the plasticizing system to improve the comprehensive performance of the vulcanizate. Background technique [0002] Thermoplastic vulcanizate (TPV for short) is prepared by dynamic full vulcanization technology. Dynamic full vulcanization technology is to mix rubber into the thermoplastic resin matrix. While mixing with the vulcanizing agent, it can make the rubber "in situ" produce chemical crosslinking, and under the action of high speed mixing and high shear force, the crosslinking The rubber is broken into micron-sized particles and dispersed in a continuous thermoplastic resin matrix to form TPV. A large number of micron-sized rubber particles provide TPV with excellent high elastic properties and permanent deformation properties, while the resin as a continuous phase provides TPV with necessary thermoplastic processing propert...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/02C08K5/12C08J3/24
Inventor 张立群江美娟伍社毛田洪池田明
Owner SHANDONG DAWN POLYMER CO LTD
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