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Styrene butadiene rubber with characteristics of easy processing and aging resistance, and preparation method thereof

A styrene-butadiene rubber and anti-aging technology, applied in the field of styrene-butadiene rubber and its preparation, can solve the problems of no anti-aging effect, easy precipitation and the like

Active Publication Date: 2018-03-27
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The softeners reported in the patent are actually physical plasticizers, mainly including aromatic oil, paraffin oil, naphthenic oil, heavy oil, paraffin, vaseline, asphalt, petroleum resin, etc. This kind of softener can only soften rubber by filling effect, no anti-aging effect, and prone to precipitation during product use

Method used

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  • Styrene butadiene rubber with characteristics of easy processing and aging resistance, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mix anti-scorch agent 2-vinylbenzoic acid and anti-aging agent 2-propenylphenol in a molar ratio of 1.0:5.0, prepare a solution with 30% mass concentration with hexane solvent, add anti-scorch agent and anti-aging agent to the solution 0.1% olefin metathesis catalyst on the total amount of substance Isolate air and water, react at room temperature for 8 hours, and use a vacuum desolventizer to remove the solvent to prepare anti-scorch rubber antioxidant 1-1.

[0039] Dissolve 100 parts of styrene-butadiene rubber SBR1500 in hexane solvent to prepare a 1.1% concentration solution, add 0.15 parts of olefin metathesis catalyst And 1.3 parts of anti-scorch rubber anti-aging agent 1-1, at 15.5 ℃ isolated from air and water, react for 0.51 hours, the reacted glue solution is detached by solvent to obtain anti-aging softener, and its Mn is measured to be 90000.

[0040] Mix 100 parts of styrene-butadiene rubber SBR1500 on an open mill at 75°C for 4 times, add 10 parts of th...

Embodiment 2

[0045] Mix anti-scorch agent 3-vinyl phthalic acid and anti-aging agent 2,4,6-triallyl phenol at a molar ratio of 1.0:0.1, prepare a solution with 1% mass concentration with hexane solvent, add to the solution Add 0.01% of the olefin metathesis catalyst accounting for the total amount of anti-scorch agent and anti-aging agent After isolating air and water and reacting at room temperature for 0.5 h, the solvent was removed by a vacuum desolventizer to obtain anti-scorch rubber antioxidant 2-1.

[0046] Dissolve 100 parts of styrene-butadiene rubber SBR1500 in toluene solvent to prepare a 10% concentration solution, add 0.9 parts of olefin metathesis catalyst And 48 parts of anti-scorch rubber antioxidant 2-1, separated from air and water at 49°C, and reacted for 4.6 hours. The reacted glue solution was removed by solvent to obtain an anti-aging softener product, and its Mn was measured to be 3100.

[0047] Mix 100 parts of styrene-butadiene rubber SBR1500 and 14 parts of ant...

Embodiment 3

[0054] Mix anti-scorch agent 3-vinyl phthalic acid and anti-aging agent 2,6-diallyl-p-cresol at a molar ratio of 1.0:4.0, prepare a solution with 10% mass concentration with hexane solvent, and add it to the solution Add 0.09% of the olefin metathesis catalyst accounting for the total amount of anti-scorch agent and anti-aging agent Isolate air and water, react at room temperature for 4.5 hours, and use a vacuum desolventizer to remove the solvent to obtain anti-scorch rubber antioxidant 3-1.

[0055] Dissolve 100 parts of styrene-butadiene rubber SBR1712 base rubber in cyclohexane solvent to prepare a 25% concentration solution, add 0.4 parts of olefin metathesis catalyst and 25 parts of anti-scorching rubber anti-aging agent 3-1, separated from air and water at 25°C, and reacted for 2.5 hours. After the reaction, the glue solution was removed by solvent to obtain an anti-aging softener product, and its Mn was measured to be 60,000.

[0056] Mix 100 parts of styrene-butadi...

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Abstract

The invention provides a styrene butadiene rubber with characteristics of easy processing and aging resistance, and a preparation method thereof. According to the present invention, the styrene butadiene rubber contains a base rubber and an anti-aging softening agent, and is prepared through a mixing technology, wherein an olefin double-decomposition catalyst and a coke-proof rubber anti-aging agent are added to a styrene butadiene rubber and a reaction is performed to obtain the anti-aging softening agent; compared to the Mooney viscosity of the base rubber, the Mooney viscosity of the styrene butadiene rubber product of the present invention is reduced by 0.2-2.0 unit / part (calculated as the softening agent adding amount; and the tensile strength is reduced by 10-30% and the scorching time is delayed by 1-15 s / part after 1-100 parts of the anti-aging softening agent is added while the tensile strength is reduced by 40-60% in the absence of the anti-aging softening agent.

Description

technical field [0001] The invention relates to a styrene-butadiene rubber and a preparation method thereof, in particular to an easy-to-process styrene-butadiene rubber with anti-aging performance and a preparation method thereof. Background technique [0002] The rubber aging process is often accompanied by some remarkable phenomena, such as the appearance of long-term stored natural rubber becoming soft, sticky, and spots; rubber products are deformed, brittle, hard, cracked, moldy, and lose gloss and color changes, etc. In terms of physical properties, rubber has changes in swelling and rheological properties. In terms of mechanical properties, indicators such as tensile strength, elongation at break, impact strength, bending strength, compressibility, and elasticity will decrease. Generally, anti-aging agents are added during rubber coagulation and processing. Common anti-aging agents are easy to precipitate, and various load-type, reactive, and composite anti-aging a...

Claims

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Application Information

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IPC IPC(8): C08L9/06C08L15/00C08F236/10C08F8/50C08F8/00
CPCC08F8/50C08L9/06C08F8/00C08F236/10C08L15/00
Inventor 艾纯金赵洪国王锋李波崔英郭珺孟令坤龚光碧赵旭涛梁滔李树毅陈建刚李晶郑聚成李昌伟刘鹏
Owner PETROCHINA CO LTD
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