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Acrylic emulsion for fiber sealing material and its synthesis method

The technology of acrylic emulsion and sealing material is applied in the field of preparing an environment-friendly interpenetrating polymer network acrylic emulsion, which can solve the problems of low polymer cold resistance, low glass transition temperature, bonding strength, damage, low mechanical strength, etc. good binding effect

Active Publication Date: 2020-12-15
中轻(晋江)卫生用品研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently commercially available acrylic emulsions used for sealing materials have two major deficiencies. One is that most of the commercially available acrylic emulsions use raw materials and additives that cause certain harm to the environment in the formulation and synthesis; There is a certain contradiction between the cold resistance performance (with a lower glass transition temperature) and the bonding strength, that is, when the polymer is at a lower Tg, the mechanical strength is lower

Method used

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  • Acrylic emulsion for fiber sealing material and its synthesis method
  • Acrylic emulsion for fiber sealing material and its synthesis method
  • Acrylic emulsion for fiber sealing material and its synthesis method

Examples

Experimental program
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preparation example Construction

[0037] The present invention also provides a method for preparing an environment-friendly interpenetrating polymer network type acrylic emulsion, the method comprising the following steps:

[0038] (1) Disperse the corresponding part of high Tg acrylate derivatives, environment-friendly self-crosslinking monomer N-isobutoxymethacrylamide (IBMA), and environment-friendly emulsifier in water to prepare the core layer pre-emulsion;

[0039] (2) Disperse the corresponding part of high Tg acrylate derivatives, all low Tg acrylate derivatives, environment-friendly self-crosslinking monomer N-isobutoxymethacrylamide (IBMA), and environment-friendly emulsifier in In water, the shell layer pre-emulsion is prepared;

[0040] (3) Part of the nuclear layer pre-emulsion and sodium persulfate aqueous solution obtained above are added dropwise to an aqueous solution containing an environmentally friendly emulsifier, sodium persulfate and sodium bicarbonate, and reacted for a period of time a...

Embodiment 1

[0054] Example 1: Used to illustrate the emulsion and its preparation method

[0055] 1. Pre-emulsification stage

[0056] Dissolve 0.6g Lexxiso TO7, 0.6g emulsifier SDS in 30ml deionized water, stir rapidly for 5min, then slowly add 80.0g methyl methacrylate, 0.45g methacrylic acid, 0.45g acrylic acid, 1.5g N-iso Butoxymethacrylamide was added and stirred for 30 minutes to obtain a core layer pre-emulsion.

[0057] Dissolve 1.5g Lexxiso TO7, 1.5g emulsifier SDS in 70ml deionized water, stir rapidly for 5min, then slowly add 20.0g methyl methacrylate, 190g n-butyl acrylate, 1.05g methacrylic acid, 1.05g acrylic acid , 3.5g of N-isobutoxymethacrylamide, and stirred for 30 minutes after adding all of them to obtain a shell pre-emulsion.

[0058] 2. Main reaction stage

[0059] Dissolve 0.8g Lexxiso TO7, 0.8g emulsifier SDS, 0.8g sodium persulfate and 1.5g sodium bicarbonate in 150ml deionized In water, stir and heat up to 80°C; add 8% pre-emulsion, control the temperature at...

Embodiment 2

[0064] 1. Pre-emulsification stage

[0065] Dissolve 0.7g of emulsifier AADK A REASOAP ER-20 and 0.7g of emulsifier AADK A REASOAP SR-20 in 30ml of deionized water, stir rapidly for 5min and slowly add 80.0g of ethyl methacrylate and 0.45g of methyl Acrylic acid, 0.45 g of acrylic acid, and 1.2 g of N-isobutoxymethacrylamide were all added and then stirred for 30 minutes to obtain a core layer pre-emulsion.

[0066] Dissolve 2.0g of emulsifier AADK A REASOAP ER-20, 2.0g of emulsifier AADK A REASOAP SR-20 in 70ml of deionized water, stir rapidly for 5min, then slowly add 20.0g of ethyl methacrylate, 190g of isooctyl acrylate Esters, 1.05g of methacrylic acid, 1.05g of acrylic acid, 3.0g of N-isobutoxymethacrylamide were all added and then stirred for 30min to obtain a shell layer pre-emulsion.

[0067] 2. Main reaction stage

[0068]In a multi-necked flask with a capacity of 1000ml equipped with a stirrer, a condenser, a dropping funnel and a thermometer, put 1.2g emulsifier ...

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Abstract

The invention belongs to the field of acrylic emulsion for bonding fibers of non-asbestos fiber composite sealing materials, and in particular relates to the preparation of an environment-friendly interpenetrating polymer network acrylic emulsion. The invention adopts the core-shell emulsion polymerization method to synthesize the interpenetrating polymer network type acrylic emulsion, improves the mechanical strength of the adhesive film after the emulsion is cured, makes it have cold resistance and adhesive performance, and introduces an environmentally friendly and non-toxic emulsifier and crosslinking agent. Monomer, harmless to the environment.

Description

technical field [0001] The invention belongs to the field of acrylic emulsion for bonding fibers of non-asbestos fiber composite sealing materials, and in particular relates to the preparation of an environment-friendly interpenetrating polymer network acrylic emulsion. Background technique [0002] Fiber sealing materials are widely used in the sealing of automobile engines, general-purpose small gasoline engines, and various pipeline connections. They are generally composite materials made of rubber, fiber, and fillers as the main raw materials. Asbestos has become the most ideal sealing material due to its unique advantages of good chemical corrosion resistance, heat resistance, flame retardancy, easy processing and low cost. However, due to the controversy over health and environmental protection, traditional asbestos-containing sealing materials have Part of it is converted to the production of non-asbestos sealing materials. In the asbestos-free latex manufacturing fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F265/06C08F220/18C08F220/14C08F220/06C08F220/58C08F2/26
CPCC08F2/26C08F265/06C08F220/1812C08F220/1808C08F220/1804
Inventor 万莹刘文陈雪峰
Owner 中轻(晋江)卫生用品研究有限公司