Grafted alkylphenol phenolic resin and preparation method thereof

A technology of grafted alkyl phenol and branched alkyl phenol, which is applied in the field of modified alkyl phenol phenolic resin and its preparation, to achieve the effects of reducing defective rate, wide application prospect and improving creep resistance

Active Publication Date: 2021-01-01
SHANDONG YANGGU HUATAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of grafting alkylphenol novolac resin, on the alkylbenzene ring of both ends of the alkylphenol novolac resin, graft phenol-polystyrene group or phenol-polystyrene group with anti-oxidation effect. Substituting styrene groups, so that the final phenolic resin has both alkylphenol novolac tackifying groups and phenol-polystyrene or phenol-polysubstituted styrene antioxidant groups, and has both tackifying and antioxidant properties. Dual function, with good initial viscosity and sticky persistence, added to the rubber compound to solve the problem of reduced stickiness due to oxidation on the surface of unvulcanized rubber, especially suitable for tire or rubber product production applications

Method used

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  • Grafted alkylphenol phenolic resin and preparation method thereof
  • Grafted alkylphenol phenolic resin and preparation method thereof
  • Grafted alkylphenol phenolic resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 206.36g of 99.5 wt% p-tert-octylphenol and 3.0g of 98wt% concentrated sulfuric acid into the reaction kettle, heat up to melt p-tert-octylphenol, and start to drop 67.2g of 37wt% when the temperature reaches 100°C Aqueous formaldehyde solution was added dropwise to carry out esterification reflux reaction, the temperature was controlled at 110°C, and the reaction was carried out for 2.5 hours. When the material became viscous during the reaction, an appropriate amount of toluene solvent was added to dilute so that the reaction could be carried out evenly; after the reaction, 9.5g of 99wt % phenol was stirred and melted, and then slowly added dropwise 31.3g of styrene, the temperature was controlled at 110°C, and reacted for 2 hours after the dropwise addition was completed. After the reaction, remove the water brought by the solvent and formaldehyde under normal pressure, then raise the temperature to carry out the polycondensation reaction, dehydrate while reacting,...

Embodiment 2

[0032] Add 150.22g of 99.5wt% p-tert-butylphenol and 3.5g of 98wt% concentrated sulfuric acid into the reaction kettle, raise the temperature to 102°C and start adding 69.61g of 37wt% formaldehyde solution dropwise, and carry out esterification while dropping Reflux reaction, the temperature is controlled at 108 ° C, and the reaction is 3 hours. When the material becomes viscous during the reaction, add an appropriate amount of toluene solvent to dilute so that the reaction can be carried out evenly; Add 35.5 g of α-methylstyrene, the temperature is controlled at 108° C., and react for 1.5 hours after the dropwise addition is completed. After the reaction is completed, remove the solvent and the water brought in by formaldehyde under normal pressure, then raise the temperature to carry out the polycondensation reaction, dehydrate while reacting, and remove the water and residual toluene produced by the polycondensation reaction under vacuum. The temperature is controlled at ≤ 1...

Embodiment 3

[0034] Add 164.24g of 99.5wt% p-tert-amylphenol and 4.9g of 98wt% concentrated sulfuric acid into the reaction kettle, raise the temperature to 105°C and start adding 71.25g of 37wt% formaldehyde solution dropwise, and carry out esterification while dropping Refluxing reaction, the temperature is controlled at 109°C, during reaction 2, when the material becomes viscous during the reaction, add an appropriate amount of toluene solvent to dilute so that the reaction can be carried out evenly; 41.4 g of α-methylstyrene was added dropwise, the temperature was controlled at 109° C., and the reaction was carried out for 1 hour after the dropwise addition was completed. After the reaction, the solvent and the water brought in by formaldehyde are removed under normal pressure, and then the temperature is raised to carry out the polycondensation reaction, while the reaction is dehydrated, and the water and residual toluene produced by the polycondensation reaction are removed under vacu...

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Abstract

According to the grafted alkylphenol phenolic resin and the preparation method thereof disclosed by the invention, a polystyrene (or poly-substituted styrene) phenol group is grafted on an alkylphenolring at the end part of an alkylphenol phenolic resin structure, so that the oxidation resistance of alkylphenol phenolic tackifying resin is enhanced; according to the invention, the surface of therubber or unvulcanized rubber is slowly oxidized and aged, the problem that the viscosity of the surface of the rubber or unvulcanized rubber is rapidly decayed and reduced due to oxidation and agingis solved, the rubber or unvulcanized rubber is endowed with good initial viscosity, viscosity durability and initial viscosity strength, the creep resistance of the rubber or unvulcanized rubber is improved, and the defective rate is greatly reduced; the long-acting tackifying resin is a good multifunctional tackifying resin, and is especially suitable for tire production.

Description

technical field [0001] The invention relates to a modified alkylphenol phenolic resin and a preparation method thereof, in particular to a kind of phenol-polystyrene group or phenol-polysubstituted styrene group with good viscosity-increasing and anti-oxidation properties Grafted alkylphenol novolac resin and method for its preparation. Background technique [0002] Alkylphenol phenolic resin is a tackifying resin with excellent performance recognized by the tire and rubber products industry in recent years, and has been widely used in the field of tires or rubber products. However, there are still problems with the viscosity durability of unvulcanized adhesives added with alkylphenol phenolic resins, so it is particularly important to improve the viscosity durability of alkylphenol phenolic resins. According to relevant literature, the environmental factors that affect the initial viscosity and persistence of the surface of unvulcanized rubber components include moisture, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F212/08C08F212/12C08G8/28C08G8/24C08G8/12C08G8/10
CPCC08F283/00C08G8/28C08G8/24C08G8/12C08G8/10C08F212/08C08F212/12
Inventor 李剑波张笑来王文博杜孟成张朋龙李庆朝
Owner SHANDONG YANGGU HUATAI CHEM
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