Nickel-system polybutadiene rubber composite anti-aging agent with anti-yellowing efficiency

Abstract

The invention provides a nickel-system polybutadiene rubber composite anti-aging agent with anti-yellowing efficiency, which relates to the technical field of preparing a nickel-system polybutadiene rubber composite anti-aging agent. The composite anti-aging agent comprises a bisphenol monocarboxylic acid ester antioxidant and a phosphite antioxidant and a sulfur antioxidant, the mass ratio of the bisphenol monocarboxylic acid ester antioxidant to the phosphite antioxidant to the sulfur antioxidant is 1:0.3-0.5:0.6-1.2, and anti-aging agent products are added into the nickel-system polybutadiene rubber to obtain an effective anti-aging component, wherein the mass percent of the anti-aging agent to dry glue is 0.2-0.6 percent. The composite anti-aging agent is used for synthesizing nickel-system polybutadiene rubber and has good ageing resistance and yellowing resistance.

Description

technical field [0001] The invention relates to a nickel-based polybutadiene rubber antioxidant, in particular to a bisphenol monocarboxylate antioxidant, a phosphite antioxidant and a sulfur-containing antioxidant as raw materials. It is a composite anti-aging agent, which has good anti-aging performance and anti-yellowing performance when used in the synthesis of nickel-based polybutadiene rubber. Background technique [0002] 1,3-butadiene as raw material, C 6 Mixed aliphatic hydrocarbons are used as solvents, and a composite catalyst system composed of nickel naphthenate-triisobutylaluminum-boron trifluoride etherate complex is used to realize nickel-based polybutadiene rubber, namely butadiene rubber, by solution polymerization process. of industrial production. Since its inception in 1965, butadiene rubber (abbreviated as BR) has high elasticity, excellent wear resistance and cold resistance, good heat resistance, aging resistance, flex resistance, low heat generatio...

AI Technical Summary

Problems solved by technology

The disadvantage is that the anti-aging performance becomes worse at higher temperatures, which causes cross-linking of BR molecules, increases the gel content, and increases the Mooney viscosity.

[0019] Polymer Degradation and Stability 49 (1995) discloses antioxidant 2, and 4-bis(methylene-S-octyl)-6-methylphenol (Irgefox1520) is compounded with antioxidant 1076 to form a composite antioxidant, and its antioxidant The aging performance is better than that of 1076 alone, but it is used in BR. The disadvantage is that the heat aging process prevents the increase of Mooney viscosity and gel content, and the performance is still unsatisfactory.

Its shortcoming is that 2246 itself is easy to oxidize and change color, which will cause yellowing of butadiene rubber products in a short time and affect the appearance of the product

If the appearance of the butadiene rubber product changes during storage, the commercial value of the product will undoubtedly be lost

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