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A kind of preparation method of aqueous polyacrylate emulsion

A technology of polyacrylate emulsion and polyacrylate, which is used in textiles and papermaking, fiber processing, etc., and can solve the problems of inherent quality (dry resistance, unguaranteed water washing performance, product dispersion, poor stability, water washing resistance and cold resistance). It can improve self-crosslinking performance, improve water resistance and soft hand feeling.

Active Publication Date: 2016-01-20
长兴三伟热熔胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the washing resistance and cold resistance of polyacrylate are relatively poor, and its "cold brittle and hot sticky" characteristics limit its application in medium and high-grade powder-free base pulp
When some fusible interlining manufacturers currently use powder-free base pulp, most of them use common polypropylene latex in other industries and a simple manual labor and physical mixing process with water. The dispersion and stability of the product are poor, and large-scale production coating It is difficult to control the process during layer operation, and the internal quality (drying resistance, washing performance) cannot be guaranteed

Method used

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  • A kind of preparation method of aqueous polyacrylate emulsion
  • A kind of preparation method of aqueous polyacrylate emulsion
  • A kind of preparation method of aqueous polyacrylate emulsion

Examples

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preparation example Construction

[0020] A method for preparing self-crosslinking water-based polyacrylate powder-free base paste for clothing adhesive lining, comprising the following steps: first, mixing water-based polyacrylate emulsion, auxiliary agents and deionized water, wherein the water-based polyacrylate Acrylate emulsion is prepared by pre-emulsion, seed emulsion, sub-emulsion, 10% adipic hydrazide aqueous solution and ammonia water. The pre-emulsion is composed of methyl methacrylate, butyl acrylate, acrylic acid, diacetone acrylamide , sodium alkylamide ethylene sulfonate, fatty alcohol polyoxyethylene ether and deionized water. The seed emulsion is prepared from a composite initiator and a polymerization bottom material. Oxyethylene ether and deionized water are prepared, the composite initiator is prepared from ammonium persulfate, sodium dodecylbenzenesulfonate and deionized water, and the secondary emulsion is composed of monomers and emulsifiers, The monomer is composed of methyl methacrylate...

preparation example 1

[0080] The present invention adopts the semi-continuous emulsion polymerization process and the seed emulsion polymerization method of pre-emulsified monomers to carry out conventional emulsion polymerization and core-shell emulsion polymerization on the same formula, and designs the composition of the core-shell to synthesize a series of polymer emulsions. The formulation composition is shown in Table 1.

[0081] Table 1 Different polymerization methods and formula composition

[0082]

[0083]Table 2 shows the stability and emulsion properties of different polymerization methods.

[0084] Table 2 Stability and emulsion properties of different polymerization methods

[0085]

[0086]

Embodiment 1

[0088] Take the PRA-2 sample emulsion in Preparation Example 1 and cool it down to room temperature, slowly add 10% adipic hydrazide (ADH) aqueous solution, and neutralize it with ammonia water until the pH value is 7-8. Filtration, discharge, to obtain a milky white emulsion in blue light, which is the product of the present invention—a main emulsion of self-crosslinking type water-based polyacrylate powder-free base slurry for clothing adhesive interlining.

[0089] The basic formula of the powder-free base pulp includes, in addition to the medium water, the base main emulsion, pH regulator, thickener, tackifier, whitening agent, preservative and defoamer, etc. Calculate the amount of deionized water and main emulsion according to the preset plan, adjust the pH value of the system to neutral with ammonia water, and then add the corresponding water-based additives to adjust the viscosity [viscosity <30000 (mPa·s / 20°C)] After that, the product of the present invention can be p...

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Abstract

The invention discloses a preparation method of a water-based polyacrylate emulsion. The preparation method comprises the following steps: 1) preparing a pre-emulsion, namely adding components of the pre-emulsion into a pre-reaction kettle, rising the temperature to 55 DEG C, and mixing for 10 min to prepare the pre-emulsion; 2) preparing a seed emulsion, namely adding a polymeric kettle backing material into a reaction kettle at first, mixing, extracting 1 / 4 of the pre-emulsion into the reaction kettle, rising the temperature to 75 DEG C, dropwise adding 1 / 4 of compound initiator, and reacting for 30 min to prepare the seed emulsion; and 3) producing an emulsion polymerization reaction. According to the preparation method, diacetone acrylamide (DAAM) is introduced into a system and adipic dihydrazide (ADH) is introduced for modifying branch chains at the same time, and the number of cross-linked sites in the system can be increased, thereby improving the self-crosslinking performance of water-based PA (polyacrylate) and forming medium-temperature self-crosslinking base mud; and the baking temperature can be properly reduced by 10-30 DEG C, so that the energy resources can be saved.

Description

technical field [0001] The invention relates to a self-crosslinking water-based polyacrylate powder-free slurry for clothing adhesive linings, in particular to a preparation method of the water-based polyacrylate emulsion. Background technique [0002] Since the appearance of double-point interlining, due to its outstanding advantages such as superior comprehensive performance, beautiful appearance, and wide application range, it has become the most important type of interlining industry in my country in less than ten years of development. Modern new coating technology with added value turns a new page. However, from a technical point of view, the field of double-point special powder-free base pulp is still random and blind. There are even a considerable number of interlining manufacturers who have chosen a large number of other industries to mix emulsion and water. There is no way to talk about washing resistance and solvent resistance when making double-dot interlining wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F220/58C08F2/30C08F2/26C08J3/24D06M15/285
Inventor 殷伟乔
Owner 长兴三伟热熔胶有限公司
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