Colored low-pressure-change high-temperature-resistant NBR rubber compound and preparation method thereof

Abstract

The invention discloses a colored low-pressure-change high-temperature-resistant NBR rubber compound and a preparation method thereof, and the colored low-pressure-change high-temperature-resistant NBR rubber compound comprises the following components in parts by weight: 44-65% of butadiene, 23-41% of acrylonitrile, 10-15% of a plasticizer, 1.5-2.5% of a reinforcing synergist, 1.5-2% of an anti-cracking agent, 1.5-2.5% of a vulcanizing agent and 0.5-2% of a vulcanization accelerator, the plasticizer comprises one or more of phthalate, palmitate, rubber oil, silicone rubber, coumarone and rosin glyceride, the reinforcing synergist comprises one of nano aluminum oxide and nano calcium carbonate, the anti-cracking agent comprises an anti-aging agent, an antioxidant and a wear-resistant filler, and the ratio of the anti-aging agent to the antioxidant to the wear-resistant filler is 2: 2: 1. According to the invention, the elasticity of the NBR rubber compound can be better improved, the tensile property of the NBR rubber compound is greatly improved, the fracture probability of the NBR rubber compound is reduced, and the service life of the NBR rubber compound is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of rubber compound preparation, and in particular to a colored low-pressure-changing and high-temperature-resistant NBR rubber compound and a preparation method thereof. Background Art

[0002] NBR rubber compound is a material made of nitrile rubber and various chemical additives. The preparation of NBR rubber compound requires different steps, among which raw material preparation, mixing, calendering, vulcanization and inspection are all steps in the production of NBR rubber compound. NBR rubber compound has good sealing properties and can be used in different fields. It can be used in the automotive industry, mechanical and electronic industry and petrochemical industry.

[0003] The patent application with publication number CN102558625B discloses a rubber formula, wherein the components and contents are as follows: NR, 100 parts; carbon black N550, 20 parts; coumarone resin, 4 parts; zinc oxide, 5 parts; stearic acid, 1.5 parts; sulfur, 1.5 parts; accelerator, 2.5 parts; antioxidant, 2 parts; microcrystalline wax, 1 part; white carbon black, 0-8 parts; naphthenic oil, 25-10 parts. The present invention proposes the above rubber formula, wherein the rubber has a lower hardness, and the rubber has a stronger bonding force with the skeleton to ensure a stable bonding effect.

[0004] The above-mentioned comparative documents can only conveniently improve the adhesion of the glue, but cannot better improve the elasticity of the glue, which is not conducive to improving the tensile properties of the NBR compound rubber. The NBR compound rubber is prone to breakage, which is not conducive to improving the service life of the NBR compound rubber and the sealing performance of the structural seal. Summary of the invention

[0005] The purpose of the present invention is to provide a colored low-pressure-changing high-temperature resistant NBR rubber compound and a preparation method thereof, which solves the problems of poor elasticity, poor tensile resistance and easy fracture of traditional NBR rubber compounds, and the problem that the service life of the NBR rubber compound and the sealing performance of the structural seal cannot be improved.

[0006] The invention solves the above technical problems through the following technical scheme, which comprises, by weight: 44-65% of butadiene, 23-41% of acrylonitrile, 10-15% of plasticizer, 1.5-2.5% of reinforcing synergist, 1.5-2% of anti-cracking agent, 1.5-2% of vulcanizing agent and 0.5-2% of vulcanization accelerator, wherein the plasticizer comprises one or more of phthalate, palmitate, rubber oil, silicone rubber, coumarone and rosin glycerol ester, the reinforcing synergist comprises one of nano alumina and nano calcium carbonate, the anti-cracking agent comprises an antioxidant, an antioxidant and a wear-resistant filler, and the ratio of the antioxidant, the antioxidant and the wear-resistant filler is 2:2:1.

[0007] Preferably, the antioxidant is one or more of hydroxyphenyl triacetamide, polyol anhydride, antioxidant WSPHY26S6J2L and antioxidant NBC.

[0008] Preferably, the antioxidant is antioxidant GM.

[0009] Preferably, the wear-resistant filler includes one or more of carbon black, silicon dioxide and nano calcium carbonate.

[0010] Preferably, the vulcanizing agent includes one of sulfur and dibenzoyl peroxide.

[0011] Preferably, the vulcanization accelerator includes one of accelerator TDEC, accelerator NS, accelerator TMTD, 2-mercaptobenzothiazole and zinc dithiocarbamate.

[0012] Preferably, a method for preparing a colored low-pressure-changing high-temperature-resistant NBR rubber compound comprises the following steps: pouring the prepared butadiene, acrylonitrile, plasticizer, reinforcing synergist, anti-cracking agent, vulcanizer and vulcanization accelerator into a container for mixing, placing the mixed mixture into a calender for calendering, and then placing the calendered product into a vulcanizer for vulcanization to obtain an NBR rubber compound.

[0013] Compared with the prior art, the beneficial effects of the present invention are: being able to achieve a better effect of improving the elasticity of the NBR rubber mix, greatly improving the tensile strength of the NBR rubber mix, reducing the probability of the NBR rubber mix breaking, being beneficial to increasing the service life of the NBR rubber mix, and improving the safety of the use of the NBR rubber mix. DETAILED DESCRIPTION

[0014] The above and other technical features and advantages of the present invention are described in more detail below. Example

[0015] The invention provides a technical solution: a colored low-pressure-changing high-temperature resistant NBR rubber compound and a preparation method thereof, comprising, by weight: 44-65% of butadiene, 23-41% of acrylonitrile, 10-15% of plasticizer, 1.5-2.5% of reinforcing synergist, 1.5-2% of anti-cracking agent, 1.5-2% of vulcanizing agent and 0.5-2% of vulcanization accelerator, the plasticizer comprising one or more of phthalate, palmitate, rubber oil, silicone rubber, coumarone and rosin glycerol ester, the plasticizer being able to improve the elasticity of the NBR rubber compound and reducing the probability of the NBR rubber compound breaking, the reinforcing synergist comprising one of nano-alumina and nano-calcium carbonate, the reinforcing synergist being able to conveniently improve the wear resistance and tensile strength of the NBR rubber compound, the anti-cracking agent comprising an antioxidant, an antioxidant and a wear-resistant filler, the antioxidant, the antioxidant and the wear-resistant filler being in a ratio of 2:2:1, and the ratio of the antioxidant, the antioxidant and the wear-resistant filler being 2:2:1. The invention can greatly reduce the cracking, hardening and brittleness of NBR rubber compound caused by aging, and can play the role of light aging resistance, accelerate the vulcanization speed, soften the rubber material, and significantly improve the heat aging resistance of NBR rubber compound, and can improve the wear resistance and tensile strength of NBR rubber compound. The antioxidant uses one or more of hydroxyphenyl triacetamide, polyol anhydride, antioxidant WSPHY26S6J2L and antioxidant NBC, the antioxidant uses antioxidant GM, the wear-resistant filler includes one or more of carbon black, silica and nano calcium carbonate, the vulcanizing agent includes one of sulfur and dibenzoyl peroxide, and can vulcanize the prepared NBR rubber compound. The vulcanization accelerator includes one of accelerator TDEC, accelerator NS, accelerator TMTD, 2-mercaptobenzothiazole and zinc dithiocarbamate, and can promote the vulcanization of NBR rubber compound.

[0016] Table 1 Example

[0017] Table 2 Example

[0018] Table 3 Example

[0019] Table 4 Example

[0020] Table 5

[0021] A method for preparing a colored low-pressure-changing high-temperature-resistant NBR rubber compound comprises the following steps: preparing butadiene, acrylonitrile, plasticizer, reinforcing synergist, anti-cracking agent, vulcanizer and vulcanization accelerator into a container for mixing, placing the mixed mixture into a calender for calendering, and placing the calendered product into a vulcanizer for vulcanization to obtain the NBR rubber compound.

[0022] The above are only preferred embodiments of the present invention, which are only illustrative and not restrictive of the present invention. Those skilled in the art understand that many changes, modifications, and even equivalences can be made to the present invention within the spirit and scope defined by the claims of the present invention, but they will all fall within the scope of protection of the present invention.

Claims

1. A colored low pressure-changing high temperature resistant NBR compound rubber, characterized in that: It includes the following components: By weight: 44-65% of butadiene, 23-41% of acrylonitrile, 10-15% of plasticizer, 1.5-2.5% of reinforcing synergist, 1.5-2% of anti-cracking agent, 1.5-2% of vulcanizing agent and 0.5-2% of vulcanization accelerator, the plasticizer comprises one or more of phthalate, palmitate, rubber oil, silicone rubber, coumarone and rosin glycerol ester, the reinforcing synergist comprises one of nano-alumina and nano-calcium carbonate, the anti-cracking agent comprises an antioxidant, an antioxidant and a wear-resistant filler, and the ratio of the antioxidant, the antioxidant and the wear-resistant filler is 2:2:

1.

2. A colored low pressure-changing high temperature resistant NBR rubber compound as claimed in claim 4, characterized in that: The antioxidant uses one or more of hydroxyphenyl triacetamide, polyol anhydride, antioxidant WSPHY26S6J2L and antioxidant NBC.

3. A colored low pressure-changing high temperature resistant NBR rubber compound as claimed in claim 5, characterized in that: The antioxidant used was antioxidant GM.

4. A colored low pressure-changing high temperature resistant NBR rubber compound as claimed in claim 6, characterized in that: The wear-resistant filler includes one or more of carbon black, silicon dioxide and nano calcium carbonate.

5. A colored low pressure-changing high temperature resistant NBR rubber compound as claimed in claim 7, characterized in that: The vulcanizing agent includes one of sulfur and dibenzoyl peroxide.

6. A colored low pressure-changing high temperature resistant NBR rubber compound as claimed in claim 8, characterized in that: The vulcanization accelerator includes one of accelerator TDEC, accelerator NS, accelerator TMTD, 2-mercaptobenzothiazole and zinc dithiocarbamate.

7. The method for preparing a colored low-pressure-changing high-temperature-resistant NBR rubber compound as claimed in claim 9, characterized in that: The following steps are involved: The prepared butadiene, acrylonitrile, plasticizer, reinforcing synergist, anti-cracking agent, vulcanizing agent and vulcanization accelerator are poured into a container for mixing, the mixed mixture is put into a calender for calendering, and the calendered product is put into a vulcanizing machine for vulcanization to obtain NBR compound rubber.

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