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Method for preparing unsaturated fatty acid zinc salt reinforced natural rubber in in-situ reaction

A technology of fatty acid zinc salt and natural rubber, which is applied in the field of preparation of unsaturated fatty acid zinc salt reinforced natural rubber generated in situ, can solve problems such as poor rubber reinforcement effect, and achieves improved dispersion effect and improved chemical cross-linking. effect, strong binding effect

Inactive Publication Date: 2014-02-05
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of poor reinforcing effect of nano-zinc oxide on rubber treated by traditional modifiers, and to prepare a highly polar and active hydroxyl group-containing compound by grafting and copolymerizing hydroxyethyl methacrylate and natural rubber. Hydroxyethyl methacrylate rubber is used as a dispersion compatibilizer between nano-zinc oxide and natural rubber to improve the dispersion effect and chemical crosslinking of unsaturated fatty acid zinc salt in natural rubber matrix, thus realizing the unsaturated fatty acid Strong combination between zinc salt and natural rubber to prepare high-performance unsaturated fatty acid zinc salt-natural rubber composite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 10 parts of nano-zinc oxide with a particle size of about 20nm, add ethanol that just soaks it, rinse it with deionized water, and then add 1.6 parts of isopropyl dioleic acid acyloxy (dioctyl phosphate acyloxy) Titanate, 0.4 parts of sodium dodecylbenzenesulfonate and 100 parts of deionized water were stirred and ultrasonically dispersed for 20 minutes, and then 10 parts of formazan with a graft rate of 20% based on dry glue and a total solid content of 20% were added. Hydroxyethyl acrylate latex, continue to use stirring ultrasonic dispersion for 20 minutes to prepare nano-zinc oxide emulsion dispersion; simultaneously use 0.5 parts of fatty alcohol polyoxyethylene ether to 100 parts of concentrated natural rubber latex with a total solid content of 60% based on dry rubber Carry out stabilizing, under constant stirring condition, the above-mentioned nanometer zinc oxide emulsion dispersion is mixed in the stable concentrated natural rubber latex equably, then dro...

Embodiment 2

[0031] Weigh 15 parts of nano-zinc oxide with a particle size of about 100nm, add ethanol that just soaks it, rinse it with deionized water, and then add 2.5 parts of isopropyl dioleic acid acyloxy (dioctyl phosphate acyloxy) Titanate, 0.5 parts of sodium dodecylbenzenesulfonate and 100 parts of deionized water were stirred and ultrasonically dispersed for 30 minutes, and then 15 parts of formazan with a graft rate of 50% based on dry glue and a total solid content of 25% were added. Hydroxyethyl acrylate latex, continue to use stirring ultrasonic dispersion for 30 minutes to prepare nano-zinc oxide emulsion dispersion; simultaneously use 0.6 parts of fatty alcohol polyoxyethylene ether to 100 parts of concentrated natural rubber latex with a total solid content of 60% based on dry rubber For stabilization, the above-mentioned nano-zinc oxide emulsion dispersion is evenly mixed into the stable concentrated natural rubber latex under the condition of constant stirring. Zinc oxi...

Embodiment 3

[0033] Weigh 5 parts of nano-zinc oxide with a particle size of about 80nm, add ethanol that just soaks it, rinse it with deionized water, and then add 1.0 parts of isopropyl dioleic acid acyloxy (dioctyl phosphate acyloxy) Titanate, 0.3 parts of sodium dodecylbenzenesulfonate and 100 parts of deionized water were stirred and ultrasonically dispersed for 40 minutes, and then 5 parts of formazan with a graft rate of 30% and a total solid content of 20% were added based on dry glue. Hydroxyethyl acrylate latex, continue to use stirring ultrasonic dispersion for 40 minutes to prepare nano-zinc oxide emulsion dispersion; simultaneously use 0.4 parts of fatty alcohol polyoxyethylene ether to 100 parts of concentrated natural rubber latex with a total solid content of 60% based on dry rubber Carry out stabilizing, under constant stirring condition, the above-mentioned nanometer zinc oxide emulsion dispersion is mixed in the stable concentrated natural latex equably, then dropwise add...

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Abstract

The invention relates to a method for preparing unsaturated fatty acid zinc salt reinforced natural rubber in in-situ reaction. The method comprises the following specific steps: adding nano-zinc oxide, a proper amount of coupling agent, an anionic surfactant and emulsion hydroxyethyl methylacrylate rubber, and preparing nano-zinc oxide emulsion dispersion by adopting stirring and ultrasonic dispersion; stabilizing emulsion natural rubber by adopting a proper amount of nonionic surfactant, uniformly mixing the nano-zinc oxide emulsion dispersion in the emulsion natural rubber, and dropwise adding an unsaturated fatty acid and an initiation cross-linking agent, thereby obtaining an in-situ reaction unsaturated fatty acid zinc salt-natural rubber composite material in a rubber latex state; further solidifying, pressing, washing, drying and performing other standard China rubber conventional processing technologies on the composite material, thereby obtaining an unsaturated fatty acid zinc salt-natural rubber composite material in a dry glue state. The composite material prepared by the method is good in performance.

Description

technical field [0001] The present invention relates to a kind of preparation method of in-situ generated unsaturated fatty acid zinc salt reinforced natural rubber, in particular to a method utilizing the excellent compatibility between hydroxyethyl methacrylate rubber and natural rubber and the compatibility of unsaturated fatty acid with natural rubber The invention relates to a method for preparing a reactive unsaturated fatty acid zinc salt reinforced natural rubber composite material through in-situ chemical reaction of nanometer zinc oxide, belonging to the technical field of rubber composite material production. Background technique [0002] Natural rubber (NR) is a non-polar rubber, and it needs to be reinforced with fillers when it is used alone as a rubber material. At present, the reinforcing fillers widely used in the rubber industry mainly include carbon black, silica, fiber, clay, calcium carbonate, etc. For a long time, zinc oxide was only used as a vulcaniz...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L51/04C08J3/24C08K5/098C08F253/00C08F220/28C08F236/04C08K9/04C08K3/22
Inventor 曾宗强余和平王启方刘宏超高新生
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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