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Method for preparing adhesive purpose chloroprene rubber

A neoprene, bonding technology, applied in the direction of adhesive type, chloroprene adhesive, adhesive, etc., can solve the complicated and complicated production process and other problems, and achieve simple and convenient process, stable performance and good quality Effect

Inactive Publication Date: 2011-05-04
CHINA NAT BLUESTAR GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product quality that above-mentioned method obtains is better, but above-mentioned operation makes production process loaded down with trivial details and complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a reaction vessel, 100 g of chloroprene monomer, 3 g of disproportionated rosin and 0.13 g of n-dodecyl mercaptan were added under nitrogen protection. While stirring, add water containing 110g soft water, 0.6g sodium hydroxide, 0.6g β-naphthalenesulfonic acid formaldehyde condensation sodium salt, 0.8g formaldehyde sodium sulfoxylate, 0.5g sodium sulfite and 0.002g formamidine sulfinic acid Mutually. After the emulsification is completed at a temperature of 20°C, adjust the system temperature to a reaction temperature of 10°C, use 1% potassium persulfate as an initiator to initiate polymerization, and when the conversion rate reaches 70%, add a pre-prepared terminator to stop the polymerization reaction . The unreacted monomer is removed under reduced pressure, the pH value is adjusted to 5-7 with 30% acetic acid solution, the gel is frozen, washed with water, and dried to obtain adhesive neoprene rubber.

[0023] After testing, the Mooney viscosity of the bonding...

Embodiment 2

[0025] In a reaction vessel, 100 g of chloroprene monomer, 3.5 g of disproportionated rosin and 0.13 g of n-dodecyl mercaptan were added under nitrogen protection. While stirring, add water containing 115g soft water, 0.64g sodium hydroxide, 0.5g β-naphthalenesulfonic acid formaldehyde condensation sodium salt, 0.5g sodium sulfite, 0.8g formaldehyde sodium sulfoxylate and 0.002g formamidine sulfinic acid Mutually. After the emulsification is completed at a temperature of 20°C, adjust the temperature of the system to a reaction temperature of 10°C, use potassium persulfate with a mass concentration of 1% as an initiator to initiate polymerization, and when the conversion rate reaches 75%, add pre-prepared agent to stop the polymerization reaction. Pressurize to remove unreacted monomers, use 30% acetic acid solution to adjust the pH value to 5-7, freeze the gel, wash with water, and dry to obtain adhesive neoprene rubber.

[0026] After testing, the Mooney viscosity of the bo...

Embodiment 3

[0028] In a reaction vessel, 100 g of chloroprene monomer, 4 g of disproportionated rosin and 0.13 g of n-dodecyl mercaptan were added under nitrogen protection. While stirring, add 130g soft water, 0.7g sodium hydroxide, 0.5g β-naphthalenesulfonic acid formaldehyde condensation sodium salt, 0.6g sodium sulfite, 0.8g formaldehyde sodium sulfoxylate, 0.4g sodium stearate and 0.002g formamidine Aqueous phase of sulfonic acid. After the emulsification is completed at a temperature of 20°C, adjust the temperature of the system to the reaction temperature of 10°C, use potassium persulfate and sodium anthraquinone-2-sulfonate as initiators to initiate polymerization, and when the conversion rate reaches 70%, add pre-prepared The terminator stops the polymerization reaction. Pressurize to remove unreacted monomers, adjust the pH value to 5-7 with 30% acetic acid solution, cryogel, wash with water, and dry.

[0029] After testing, the Mooney viscosity of the adhesive neoprene rubber...

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Abstract

The invention provides a method for preparing adhesive purpose chloroprene rubber, which comprises the following steps of: 1) completely dissolving chloroprene, mercaptan and a main emulsifier to obtain an oil phase, mixing and emulsifying with a water phase, regulating the system temperature to be reaction temperature of between 5 and 20DEG C after complete emulsification, and continuously adding a radical initiator to initiate polymerization reaction; and 2) when the conversion rate of the polymerization reaction is 70 to 80 percent, adding a terminator to stop the reaction, removing unreacted monomers, regulating the pH to be 5-7, freezing and gelling, washing with water, and drying to obtain the adhesive purpose chloroprene rubber. The preparation method, the formula and the process flow are simple and convenient, the adhesive purpose chloroprene rubber can be conveniently prepared, and the prepared product has high crystallinity, adhesion and grafting property, good quality and stable performance, solves the problems that similar products produced at home cannot be grafted and the like in the prior art, and meets new requirements of customers.

Description

technical field [0001] The invention relates to a preparation method of adhesive neoprene rubber, in particular to a preparation method of adhesive neoprene regulated by mercaptan. Background technique [0002] Neoprene is a high molecular polymer of chloroprene monomer. Low-temperature chloroprene rubber exhibits excellent adhesive properties due to its good crystallinity, so it is widely used in the field of adhesives. my country is a big country of footwear and luggage products, and the demand for this type of neoprene is relatively large. Therefore, it is imperative to develop high-performance adhesive neoprene to meet customer needs. [0003] At present, the chloroprene rubber produced in China has poor crystallinity, severe branching, inability to graft, and yellow appearance, which cannot meet the needs of downstream customers. [0004] The production technology of chloroprene rubber produced abroad is relatively advanced. Because chloroprene rubber produces more he...

Claims

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Application Information

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IPC IPC(8): C08F136/18C08F2/38C08F2/24C08F279/02C09J111/00
Inventor 雒雄雄高文龙马东柱张志刚李瑞亢胡衍平胡维甫连晓霞王锦慧翟育英
Owner CHINA NAT BLUESTAR GRP CO LTD
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