Preparation method of high-tenacity bonding type powdered neoprene

A technology of neoprene and neoprene latex, which is applied in the direction of non-polymer adhesive additives, adhesives, adhesive additives, etc., can solve the problems of short stickiness retention time, poor glue spreadability, and insufficient adhesion. To achieve the effect of reducing the space for free activities, improving the adhesion, thickening and reinforcing effect

Active Publication Date: 2014-01-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: the stickiness does not last long, and the glue is easy to die; the glue spreadability is poor; the adhesion to difficult-to-stick materials (such as fireproof boards, aluminum-plastic boards) is not strong enough; especially in winter, the adhesion drops significantly, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] ①Dissolution of thickener: Add 100 parts of water to the reaction bottle, heat to 50°C, add 0.3 parts of sodium methylcellulose, start the stirrer and stir until the sodium methylcellulose is completely dissolved. ② Preparation of grafted latex: Add 100 parts of chloroprene latex with a solid content of 25%, 100 parts of water, 0.6 part of dissolved sodium methylcellulose, 0.5 part of tert-dodecyl mercaptan in the polymerization kettle, and use nitrogen gas to After the replacement, stir and heat, add 0.4 parts of dicumyl hydroperoxide and 8 parts of fatty rosin soap when the temperature of the polymerization tank reaches 20°C, and carry out graft polymerization at 30°C. When the polymerization conversion rate reaches 70%, Add 5 parts of dibutyl phthalate to prepare grafted latex; ③ Coagulate into powder: Take 100 parts of chloroprene latex and add it to the coagulation kettle. After stirring for 20 minutes, add 6 parts of sodium chloride, fully stir and mix evenly, hea...

Embodiment 2

[0043] ①Dissolution of thickener: Add 100 parts of water to the reaction bottle, heat to 80°C, add 0.6 parts of sodium carboxymethylcellulose, start the stirrer and stir until sodium carboxymethylcellulose is completely dissolved. ② Preparation of grafted latex: Add 100 parts of chloroprene latex with a solid content of 35%, 50 parts of water, 0.4 part of dissolved sodium methylcellulose, 0.9 part of tert-dodecyl mercaptan in the polymerization kettle, and use nitrogen gas to After the replacement, stir and heat, add 0.2 parts of dicumyl hydroperoxide and 10 parts of fatty rosin soap when the temperature of the polymerization tank reaches 35°C, and carry out graft polymerization at 35°C. When the polymerization conversion rate reaches 75%, Add 6 parts of dibutyl phthalate to prepare grafted latex; ③ Coagulate into powder: Take 100 parts of chloroprene latex and add it to the coagulation kettle. 10 parts of nano-level montmorillonite, after stirring for 40 minutes, add 10 parts...

Embodiment 3

[0047] ①Dissolution of thickener: Add 100 parts of water to the reaction bottle, heat to 60°C, add 0.3 parts of sodium carboxymethylcellulose, start the stirrer and stir until sodium carboxymethylcellulose is completely dissolved. 2. Preparation of grafted latex: Add 100 parts of chloroprene latex with a solid content of 30%, 160 parts of water, 0.9 parts of dissolving sodium carboxymethyl cellulose, 1.2 parts of tert-dodecyl mercaptan in the polymerization kettle, and use After nitrogen replacement, stir and heat, add 0.6 parts of dicumyl hydroperoxide and 5 parts of fat rosin soap when the temperature of the polymerization kettle reaches 30°C, and carry out graft polymerization reaction at 30°C, when the polymerization conversion rate reaches 70% , adding 4 parts of dibutyl phthalate to obtain grafted latex; ③Agglomeration into powder: Take 100 parts of chloroprene latex and add it to the coagulation kettle. 0.6 parts of nano-sized montmorillonite, after stirring for 40 minu...

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PUM

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Abstract

The invention relates to a preparation method of thick and high-tenacity bonding type powdered neoprene. The preparation method comprises the following steps of adding neoprene, a thickening agent, water and a molecular weight regulator to a polymerizing pot in sequence; replacing with nitrogen; agitating and heating; adding an initiating agent and an activating agent while the temperature of the polymerizing pot reaches 20 to 35 DEG C; performing graft polymerization reaction at 30 to 50 DEG C; adding a termination agent after the polymerization conversion rate reaches 65 to 75% in order to obtain graft neoprene latex; adding the graft neoprene latex to a condensation kettle; adding a parting agent and a coagulant under the coagulation temperature of 10 to 30 DEG C; uniformly agitating and mixing; heating to reach 20 to 60 DEG C for ageing for 4 to 6 hours; and then separating, dehydrating and drying to obtain thick and high-tenacity bonding type powdered neoprene. The prepared powdered neoprene has the characteristics that the powder size ranges from 0.60 to 1.20mm, the powdered ratio is not less than 99.5%, the ash content is not greater than 0.10%, the volatile matter is not greater than 0.12%, the swelling time is 2 to 15 seconds, the dissolution needs 1 to 3 hours, and the peeling strength is not less than 90N / cm.

Description

technical field [0001] The invention belongs to the preparation of powdered neoprene rubber, relates to the field of adhesives, in particular to a viscous type, high-strength bonded powdered neoprene rubber and a preparation method thereof. Background technique [0002] Adhesive neoprene is an important raw material in the adhesive industry. In recent years, with the development of the domestic construction and decoration industry, higher and newer requirements have been put forward for the quality of adhesives. Due to the influence of the formulation process itself or the construction environment, there will be one or another abnormality during the use of the glue. For example: the stickiness does not last long, and the glue is easy to die; the glue spreadability is poor; the adhesion to difficult-to-stick materials (such as fire-proof boards, aluminum-plastic boards) is not strong enough; especially in winter, the adhesion drops significantly, etc. [0003] Cellulose eth...

Claims

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Application Information

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IPC IPC(8): C08G81/02C09J187/00C09J11/04
Inventor 魏绪玲梁滔付含琦魏玉丽刘宝勇郑聚成龚光碧李晶丛日新徐典宏艾纯金朱晶
Owner PETROCHINA CO LTD
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