Biomass rubber tear resistance agent

Abstract

The present application relates to rubber auxiliary manufacturing field, especially to rubber tear resistant agent composition containing natural biomass and its preparation method and application. The raw material composition and weight ratio of the biomass rubber tear resistant agent composition are as follows: 100 parts of eucommia ulmoides rubber, 1-10 parts of ethylene-vinyl acetate copolymer, 40-90 parts of white carbon black, 10-20 parts of phenol tar, and 10-50 parts of plasticizer. The biomass tear resistant agent composition manufactured by the method of the present application is a reactive auxiliary agent, which is used together with vulcanizing agent and can be co-crosslinked with solid rubber such as natural rubber and synthetic rubber. The tread rubber prepared by the biomass tear resistant agent composition has low energy consumption in the mixing process of the rubber compound, good size stability of the extrudate, good surface quality of the extruded and calendered rubber compound, good mechanical properties of the tread rubber, high tear resistance and high cutting resistance compared with the commonly used tread rubber composition, which can improve the durability of the tire and prolong the service life of the tire.

Description

Technical Field

[0001] This invention relates to the field of rubber additive manufacturing, and more particularly to tear-resistant compositions containing biomass rubber, their preparation methods, and applications. Background Technology

[0002] With the development of the automotive and highway industries, higher demands are constantly being placed on the tire industry: tires must have good wear resistance to extend their service life; low rolling resistance to reduce fuel consumption and save energy; good handling stability in starting, braking, cornering, and sideslip to ensure safety; high load capacity, high traction, good off-road performance, and adaptability to high temperatures and speeds; good cushioning performance and low noise, etc. All-steel radial truck tires, due to harsh road conditions and heavy loads, require even higher levels of tear resistance, chipping resistance, and wear resistance. The role of rubber tear inhibitors is to improve the tear resistance of the tire tread rubber, reduce chipping, and extend tire life.

[0003] Eucommia rubber is a natural high-trans rubber, with 1,4-polyisoprene as its main component and a trans content of approximately 97% or more. Eucommia rubber possesses excellent physical and mechanical properties, particularly in the tread compound, where it exhibits significantly improved tear resistance and puncture resistance. Fully utilizing this unique property advantage of natural Eucommia rubber can enhance the tear resistance of tire tread compounds. Summary of the Invention

[0004] The purpose of this invention is to manufacture a novel biomass tear-resistant agent. It possesses excellent tear resistance and cut resistance, thus extending tire lifespan.

[0005] The raw material composition and weight ratio of the biomass tear-resistant agent of the present invention are as follows: 100 parts of Eucommia ulmoides rubber, 1-10 parts of ethylene-vinyl acetate copolymer, 40-90 parts of silica, 10-20 parts of phenolic tar, and 10-50 parts of plasticizer.

[0006] This invention involves uniformly dispersing rubber with a filler and reinforcing system, a plasticizer, and other compounding agents on an open mixing mill or internal mixer, and then granulating the mixture using a granulator to obtain a biomass tear-resistant agent. The mixing temperature is 25-180℃, and the mixing time is 2-60 min. The granulation temperature is 20-100℃, and the screw speed is 5-100 r / min.

[0007] The main properties of the biomass tear-resistant agent of this invention are as follows:

[0008] Volatile matter: 0.77%;

[0009] Ash content: 0.19%;

[0010] Nitrogen content: 0.018;

[0011] The outstanding features and significant effects of this invention can be seen from the following embodiments, but they are not intended to limit the invention in any way. Detailed Implementation

[0012] General formulation of tread compound and formulation of the present invention

[0013]

[0014] Note: Natural rubber: No. 3 smoked sheet rubber, produced in Thailand; other common reagents are available commercially.

[0015] The preparation process of the formulations in the above embodiments is as follows:

[0016] First stage of mixing: Add natural rubber and mix at 60℃ for 1 minute, then add anti-tear agent, zinc oxide, stearic acid, antioxidant and anti-scorching agent and other small materials and mix for 1.5 minutes, then add carbon black and environmentally friendly aromatic oil and mix for 3 minutes, then discharge the rubber at a temperature of 150-170℃.

[0017] Second stage of mixing: Add the first-stage compound, sulfur, and accelerator, and pass through a thin sheet 6 times. The rubber compound is vulcanized on a flat vulcanizing machine at 150℃ for 25 minutes.

[0018] The test data obtained from each embodiment are as follows:

[0019]

[0020] As can be seen from the above examples and comparative examples, compared with the general formulation, the formulations in the examples have the following characteristics: the mixing power during the rubber compounding process is lower, which can achieve the purpose of energy saving and consumption reduction; the surface of the compounded rubber is smooth and flat after sheeting, and the appearance is better, indicating that the compounded rubber in the examples has better processing performance. The vulcanized rubber in the examples has better comprehensive physical properties, and the tear resistance of the vulcanized rubber is significantly improved after the addition of the tear-resistant agent.

Claims

1. A biomass rubber tear-resistant agent, characterized in that: The raw material composition of the biomass rubber tear-resistant agent is as follows: Eucommia ulmoides rubber, ethylene-vinyl acetate copolymer, silica, and plasticizer.

2. The biomass rubber tear-resistant agent according to claim 1, characterized in that: The raw material composition and weight distribution ratio of the material are 100 parts of Eucommia ulmoides rubber and 1-10 parts of ethylene-vinyl acetate copolymer.

3. The biomass rubber tear-resistant agent according to claim 1 or 2, characterized in that: The raw material composition and weight distribution ratio of the material is 40-90 parts of silica.

4. The biomass rubber tear-resistant agent according to claim 1 or 2, characterized in that: The phenolic tar of the material is one or more of hydroquinone tar, furanol tar, and hydroquinone tar-formaldehyde oligomer, in a total of 10-20 parts.

5. The biomass rubber tear-resistant agent according to claims 1-3, characterized in that: The raw material composition and weight distribution ratio of the synthetic rubber layer material is 10-50 parts of plasticizer, and the plasticizer is naphthenic oil or environmentally friendly aromatic oil.

6. The biomass rubber tear-resistant agent according to any one of claims 1-4, characterized in that... The process includes the following steps: First, the rubber, filler, reinforcing agent, plasticizer, and other compounding agents of the aforementioned material of the present invention are added to an open mixing mill or internal mixer to obtain a mixture. The mixing temperature is 25-180℃ and the mixing time is 2-60min. The mixture is then added to a granulator for granulation to obtain a biomass tear-resistant agent. The granulation temperature is 20-100℃ and the screw speed is 5-100r / min.

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