Continuous reaction production method of maleic anhydride grafted chlorinated polyethylene copolymer rubber

A technology of chlorinated polyethylene and maleic anhydride, which is applied in the field of continuous reaction production of maleic anhydride grafted chlorinated polyethylene copolymer rubber, which can solve the problems of wear resistance, self-bonding and bonding with reinforcing fabrics or steel wires Problems such as poor performance, large product shrinkage, and easy tearing of the product can achieve the effects of temperature control, increased contact area, and short residual time

Pending Publication Date: 2021-02-26
潍坊硕邑化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since CM is a saturated rubber, the molecular main chain does not contain double bonds, and the chlorine atom bonded to the secondary carbon atom is not highly reactive. At this stage, the CM vulcanization system uses a relatively mature peroxide vulcanization system. Faster, the physical properties of the product are good, but the tear strength is poor, especially the hot tear strength. After the molded rubber product is vulcanized, the product is easy to tear when the mold is opened, and the scrap rate is high. In addition, the wear resistance, self-adhesive Bonding and bonding with reinforced fabric or steel wire is poor, and the shrinkage rate of the product is relatively large

Method used

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  • Continuous reaction production method of maleic anhydride grafted chlorinated polyethylene copolymer rubber
  • Continuous reaction production method of maleic anhydride grafted chlorinated polyethylene copolymer rubber

Examples

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Effect test

Embodiment 1

[0029] This embodiment provides a continuous reaction production method of maleic anhydride grafted chlorinated polyethylene copolymer rubber, the specific steps are:

[0030] 1. choose weight-average molecular weight (Mw) to be 100,000, chlorine weight percentage content is 20Kg of chlorinated polyethylene rubber CM powder 20Kg of 35%, acid absorbing agent highly active magnesium oxide 0.2kg, stabilizer calcium stearate 0.3kg, anti- Oxygen agent 1010 is 0.1kg, after the above-mentioned materials are mixed uniformly, drop into the barrel of metering in the twin-screw continuous reactor band of the same direction;

[0031] 2. Weigh 0.6kg of maleic anhydride, dissolve it in 0.09kg of acetone, and pour the dissolved solution into the sealed barrel of the co-rotating twin-screw continuous reactor with metering;

[0032] 3. Weigh 0.1kg of tert-butyl peroxypivalate, dissolve it in 0.02kg of acetone, and pour the dissolved solution into a sealed cylinder with metering in a co-rotatin...

Embodiment 2

[0039] This embodiment provides a continuous reaction production method of maleic anhydride grafted chlorinated polyethylene copolymer rubber, the specific steps are:

[0040] 1. choose weight-average molecular weight (Mw) to be 150,000, chlorine weight percent content is 20Kg of chlorinated polyethylene rubber CM powder 20Kg of 32%, acid absorbing agent hydrotalcite 0.3kg, organotin stabilizer 0.5kg, antioxidant 168 is 0.15kg, after mixing the above materials evenly, put them into the barrel of the co-rotating twin-screw continuous reactor with metering;

[0041] 2. Weigh 0.5kg of maleic anhydride, dissolve it in 0.10kg of acetone, and pour the dissolved solution into the sealed barrel of the co-rotating twin-screw continuous reactor with metering;

[0042] 3. Weigh 0.06kg of tert-butyl peroxide-3,5,5-trimethylacetate, dissolve it in 0.012kg of acetone, and pour the dissolved solution into a co-rotating twin-screw continuous reactor with metering closed in the barrel;

[00...

Embodiment 3

[0049] This embodiment provides a continuous reaction production method of maleic anhydride grafted chlorinated polyethylene copolymer rubber, the specific steps are:

[0050] 2. Choose weight average molecular weight (Mw) as 180,000, chlorine weight percent content is 20Kg of chlorinated polyethylene rubber CM powder 20Kg of 40%, acid absorbing agent high active magnesium hydroxide 0.6kg, rare earth stabilizer 0.3kg, antioxidant 1076 is 0.06kg, after above-mentioned material is mixed, drop in the barrel of metering of co-rotating twin-screw continuous reactor band;

[0051] 2. Weigh 0.8kg of maleic anhydride, dissolve it in 0.12kg of acetone, and pour the dissolved solution into the sealed barrel of the co-rotating twin-screw continuous reactor with metering;

[0052]3. Weigh 0.08kg of dilauroyl peroxide, dissolve it in 0.016kg of acetone, and pour the dissolved solution into a parallel twin-screw continuous reactor with a metered closed barrel;

[0053] 4. The temperature o...

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Abstract

The invention discloses a continuous reaction production method of maleic anhydride grafted chlorinated polyethylene copolymer rubber, and belongs to the field of chlorinated polyethylene rubber preparation. The method comprises the following steps: uniformly mixing chlorinated polyethylene rubber powder, an acid acceptor, a stabilizer and an antioxidant; respectively dissolving maleic anhydride and an initiator with certain mass in acetone; then respectively pouring chlorinated polyethylene rubber powder, the acid acceptor, the stabilizer, the antioxidant mixture and an acetone solution of the maleic anhydride and the initiator into a charging barrel of a reactor, and metering and injecting into a co-rotating twin-screw continuous reactor with a special screw combination; metering and injecting a chain terminator at the tail end of the co-rotating twin-screw continuous reactor, and obtaining maleic anhydride grafted chlorinated polyethylene copolymer rubber granules after the graftingreaction is finished. 1-8% by weight of maleic anhydride branched chain is grafted on a macromolecular chain so that the hot tearing strength, wear resistance, self-adhesion and adhesion performancewith a reinforced fabric or a steel wire of a rubber product produced by maleic anhydride grafted chlorinated polyethylene copolymer rubber are obviously improved, and the problem that the shrinkage rate of a traditional chlorinated polyethylene product is relatively large is solved.

Description

technical field [0001] The invention belongs to the field of preparation of chlorinated polyethylene copolymer rubber, in particular to a continuous reaction production method of maleic anhydride grafted chlorinated polyethylene copolymer rubber. Background technique [0002] Chlorinated polyethylene is a polymer material produced by high-density polyethylene through chlorination substitution reaction. Traditional chlorinated polyethylene rubber (hereinafter referred to as CM) is widely used in wire and cable, hose tape, molded rubber products, etc. [0003] Since CM is a saturated rubber, the molecular main chain does not contain double bonds, and the chlorine atom bonded to the secondary carbon atom is not highly reactive. At this stage, the CM vulcanization system uses a relatively mature peroxide vulcanization system. Faster, the physical properties of the product are good, but the tear strength is poor, especially the hot tear strength. After the molded rubber product i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F222/06
CPCC08F255/023
Inventor 李垂祥孙振宇王文华韩新帅代娇徐建华
Owner 潍坊硕邑化学有限公司
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