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Preparation method of oil-resistant isoprene functional rubber and product thereof

A technology of isoprene and rubber, which is applied in the field of isoprene ternary rubber preparation method and its products, can solve the problems of lack of heat resistance and weather resistance, single isoprene rubber performance, poor wear resistance, etc., and achieve improvement Oil resistance, improved abrasion resistance and tensile properties, and the effect of achieving comprehensive performance

Active Publication Date: 2015-12-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in these current methods, they only improve the performance of a certain aspect of isoprene rubber, or they are still lacking in some other major links and performances.
Therefore, there is an urgent need to find a new preparation method of isoprene rubber, which can more comprehensively solve the shortcomings of the above-mentioned isoprene rubber, especially solve the problems of poor wear resistance and oil resistance in current isoprene rubber. The performance is not good, and there are still some problems in heat resistance and weather resistance.

Method used

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  • Preparation method of oil-resistant isoprene functional rubber and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Deionized water, emulsifier sodium dodecylbenzenesulfonate (SDBS), electrolytes KCl and K 3 PO 4 1. The monomers are isoprene (IP), limonene (LIM) and butyl acrylate (BA), and the above substances are sequentially added into a pressure reactor to obtain a polymerization system.

[0037] Wherein, 250 g of deionized water was added, the total mass of monomers was 100 g, and the mass ratio of isoprene (IP), limonene (LIM), and butyl acrylate (BA) was 6:3:1. The added amount of SDBS accounts for 2% of the total mass of the monomer, the mass of potassium chloride accounts for 0.5% of the total mass of the monomer, and the mass of potassium phosphate accounts for 0.2% of the total mass of the monomer. The addition amount of initiator potassium persulfate is 0.2% of the total mass of monomers.

[0038] 2) Treat the reactor containing the polymerization system with N 2 Evacuate 5 times to get rid of the air in the reactor. Then the reactor is heated to 30°C, the pressure...

Embodiment 2

[0046] 1) Deionized water, emulsifier sodium dodecylbenzenesulfonate (SDBS), electrolytes KCl and K 3 PO 4 , monomer isoprene (IP), limonene (LIM) and dibutyl itaconate (DBI) were sequentially added into the pressure reactor to obtain a polymerization system.

[0047] Wherein, 250 g of deionized water was added, the total mass of the monomer was 100 g, and the mass ratio of isoprene (IP), limonene (LIM), and dibutyl itaconate (DBI) was 6:3:1. The added amount of SDBS accounts for 2% of the total mass of the monomer, the mass of potassium chloride accounts for 0.5% of the total mass of the monomer, and the mass of potassium phosphate accounts for 0.2% of the total mass of the monomer. The addition amount of initiator potassium persulfate is 0.2% of the total mass of monomers.

[0048] 2) Treat the reactor containing the polymerization system with N 2 Evacuate 5 times to get rid of the air in the reactor. Then the reactor was heated to 30°C, the pressure inside it was adjust...

Embodiment 3-6

[0051] In order to study the influence of different feed ratios on the copolymerization product PLIB, the total number of monomers was selected as 100 parts, the mass fraction of fixed limonene was 30 parts, and the feeding rate of butyl acrylate was 10 parts, 20 parts, 30 parts, 40 parts, and other The reaction conditions are: the total mass of the monomer is 100g, deionized water 200g, SDBS2g, KCl0.5g, K 3 PO 4 0.2g, K 2 S 2 o 8 0.25g.

[0052] Put the above polymerization system at 30℃ and 1MPa N 2 Pre-emulsify under atmosphere for 1 hour, then raise the temperature to 70° C., and react for 8 hours. After the reaction, the rubber was demulsified and coagulated with a calcium chloride solution with a concentration of 2 wt %, washed repeatedly with deionized water, and dried to obtain a copolymerized product.

[0053] The change of the copolymerization composition of PLIB with the feed ratio and the determination of its molecular weight are shown in Table 1 using nuclea...

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Abstract

The invention provides a preparation method of oil-resistant isoprene functional rubber. The preparation method includes the steps of S1, adding water, an emulsifying agent, electrolyte and a monomer into a reactor to form a polymerization system to allow pre-emulsification reaction; S2, adding an initiator into obtained pre-emulsified solution to allow reaction for 2-7 hours in the nitrogen atmosphere so as to obtain first reaction liquid; S3, subjecting the first reaction liquid to demulsification by using calcium chloride solution so as to obtain isoprene-limonene-ester ternary polymerized rubber. The invention further provides a preparation method of hydrogenated ternary polymerized rubber. From molecular geometry, by introducing second square-rigid monomer limonene, third square-polar monomer butyl acrylate and dibutyl itaconate and by ternary emulsion copolymerization, an ternary copolymerized elastomer obtained has breakthrough in terms of oil resistance and wear resistance in isoprene rubber; by further adding the hydrogen, part of unsaturated carbon-carbon double bonds are eliminated, and heat resistance and ozone resistance of the isoprene rubber are synchronously improved.

Description

technical field [0001] The invention belongs to the field of organic polymer compounds, and in particular relates to a preparation method of isoprene ternary rubber and the obtained product. Background technique [0002] Isoprene rubber is a general-purpose rubber synthesized from isoprene. Due to its chemical composition similar to natural rubber, it has good elasticity, cold resistance and high tensile strength. It is an important raw material to replace natural rubber in the manufacture of passenger car tires, bias tires, truck radial tires, semi-steel car and light truck radial tires, etc. It can also be widely used in the production of cord rubber, conveyor belts, mechanical products, hoses, tapes, sponges, adhesives , wire and cable, sports equipment, medical materials and rubber shoes and other fields. It can be used alone or in combination with natural rubber or other synthetic rubber. [0003] Although isoprene rubber has many excellent properties, it also has som...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/08C08F220/18C08F222/14C08F210/14C08F2/26C08F4/70
Inventor 岳冬梅陈伟雄倪延强张立群
Owner BEIJING UNIV OF CHEM TECH
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