Epoxy natural rubber composite material and preparation method thereof

A technology of natural rubber and composite materials, applied in the field of rubber materials, can solve the problems of easy aging, poor aging resistance, short service life, etc., improve ozone aging resistance and ultraviolet aging resistance, improve aging resistance, Ease of scale-up production

Inactive Publication Date: 2018-09-14
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although epoxidized natural rubber overcomes the problem of storage hardening of natural rubber, its disadvantage is that the aging resistance is very poor. Because the molecular chain of epoxidized natural rubber contains a large number of unsaturated double bonds and epoxy groups, it is easy to A chemical reaction occurs, and the epoxidized natural rubber is subjected to external factors such as heat, oxygen, light, mechanical force, radiation, chemical media, and ozone in the air during use, causing chemical changes in its macromolecular chains and destroying the original rubber. It has a chemical structure, which leads to deterioration of rubber properties, which in turn leads to easy aging of epoxidized natural rubber products during processing or use, and its aging performance is worse than that of natural rubber
Therefore, epoxidized natural rubber products generally have problems such as short storage time, short service life, aging and stickiness, which limit the application of epoxidized natural rubber to a large extent.

Method used

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  • Epoxy natural rubber composite material and preparation method thereof

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preparation example Construction

[0031] The invention provides the preparation method of the epoxidized natural rubber composite material described in the above technical scheme, comprising the steps of:

[0032] (1) modifying ammonia water, rare earth oxides and zeolite molecular sieves in an aqueous phase system to obtain a rare earth modified zeolite molecular sieve dispersion;

[0033] (2) mixing the zeolite molecular sieve dispersion modified by rare earth in the step (1) with a surfactant, milky epoxidized natural rubber latex, to obtain a composite material in a latex state;

[0034] (3) mixing the composite material in the latex state in the step (2) with a coagulant, then performing tablet compression, granulation and drying successively to obtain a composite material in a dry glue state;

[0035] (4) Mixing and vulcanizing the composite material in the dry rubber state in the step (3) with a vulcanization processing aid to obtain an epoxidized natural rubber composite material.

[0036] The inventi...

Embodiment 1

[0042] In parts by weight, add 0.1 part of lanthanum oxide to 100 parts of deionized water, then add 0.5 part of ammonia water (concentration is 0.1%), control the ultrasonic power to 500W, and add 0.1 part of 3A molecular sieve in the state of ultrasonic dispersion , placed in a water bath at 30° C. for continuous ultrasonication for 5 min to obtain a rare earth modified zeolite molecular sieve dispersion, then add 0.05 parts of sodium dodecylbenzenesulfonate and 100 parts of dry rubber in milky epoxidized natural rubber ( The degree of epoxidation is 2), continue ultrasonic stirring for 1.2h, and obtain the composite material in the latex state; add 1.5 parts of methanol to solidify the composite material in the latex state, and after solidification, go through tabletting, granulation, and drying to obtain the composite material in the dry rubber state. Composite materials, and then add 0.9 parts of sulfur, 1.7 parts of accelerator NS, 5 parts of zinc oxide and 1 part of stea...

Embodiment 2

[0044] In parts by weight, add 10 parts of cerium oxide to 100 parts of deionized water, then add 10 parts of ammonia water (concentration is 20%), control the ultrasonic power to 700W, and add 30 parts of 4A molecular sieve in the state of ultrasonic dispersion , placed in a water bath at 80°C for continuous ultrasonication for 120min to obtain a rare earth-modified zeolite molecular sieve dispersion, then add 0.8 parts of sodium lauryl sulfate and 100 parts of dry rubber in milky epoxidized natural rubber (epoxy The degree of melting is 50), continue ultrasonic stirring for 2h, and obtain the composite material in the latex state; add 4 parts of ethanol to solidify the composite material in the latex state, and after solidification, go through tabletting, granulation, and drying to obtain the composite material in the dry glue state. Then add 0.7 parts of sulfur, 2 parts of accelerator NS, 6 parts of zinc oxide and 2 parts of stearic acid in a two-roll mill for mixing and vul...

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Abstract

The invention provides an epoxy natural rubber composite material. The epoxy natural rubber composite material is prepared from the following raw materials in parts by weight: 100 parts of emulsifiedepoxy natural rubber, 0.1 to 30 parts of zeolite molecular sieve, 0.1 to 10 parts of rare-earth oxide, 0.5 to 10 parts of ammonium hydroxide, 0.05 to 0.8 part of surfactant, 0.1 to 4 parts of coagulator, and 0.2 to 12 parts of vulcanization processing aid. The epoxy natural rubber composite material prepared by the invention has excellent aging resistance, low themogenesis performance and good fatigue resistance, and can be applied to the epoxy natural rubber products such as medical rubber products, soles, tires, rubber pipes and the like. The preparation method of the epoxy natural rubber composite material is simple in process, stable in product quality and easy in industrialized production.

Description

technical field [0001] The invention relates to the technical field of rubber materials, in particular to an epoxidized natural rubber composite material and a preparation method thereof. Background technique [0002] Epoxidized natural rubber is a new type of polymer obtained by epoxidizing natural rubber. It has excellent air tightness, oil resistance and good adhesion, as well as good wet skid resistance and low Rolling resistance has broad application prospects in the application of high-performance green tires. [0003] Although epoxidized natural rubber overcomes the problem of storage hardening of natural rubber, its disadvantage is that the aging resistance is very poor. Because the molecular chain of epoxidized natural rubber contains a large number of unsaturated double bonds and epoxy groups, it is easy to A chemical reaction occurs, and the epoxidized natural rubber is subjected to external factors such as heat, oxygen, light, mechanical force, radiation, chemic...

Claims

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Application Information

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IPC IPC(8): C08L15/00C08L97/00C08K13/06C08K7/26C08K5/42C08K3/22C08K5/09C08K5/41
CPCC08K3/22C08K5/09C08K5/41C08K5/42C08K7/26C08K13/06C08K2003/2296C08L15/00C08L2201/08C08L97/00C08K3/06
Inventor 杨昌金廖禄生彭政许逵钟杰平
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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