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A kind of polyacrylic acid thickener and preparation method thereof

A technology of polyacrylic acid and thickener, which is applied in dyeing, textile and papermaking, etc. It can solve the problems of low product viscosity, long process time and unstable performance, and achieve high output, simple process and good quality of finished products.

Active Publication Date: 2021-06-01
CGN DASHENG ELECTRON ACCELERATOR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned preparation method needs to raise the temperature in the reactor and maintain it to a certain temperature for a stable reaction, and the process time is longer; moreover, the prepared product has low viscosity and unstable performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] The invention provides a kind of preparation method of polyacrylic acid thickener, comprises the following steps:

[0028] a) Mix an alkenoic monomer, lye, water, crosslinking agent, emulsifier and solvent to obtain a mixed material liquid; the alkenoic monomer includes acrylic acid, methacrylic acid, acrylamide, crotonic acid and one or more of crotonic anhydride;

[0029] b) homogeneously emulsifying the mixed material liquid obtained in step a) to obtain a mixed emulsion;

[0030] c) irradiating the mixed emulsion obtained in step b) with electron beams to obtain a homogeneous paste; and then condensing to obtain a polyacrylic acid thickener.

[0031] In the invention, firstly, the alkenoic monomer, lye, water, crosslinking agent, emulsifier and solvent are mixed to obtain a mixed material liquid. In the present invention, the alkenoic acid-based monomer includes one or more of acrylic acid, methacrylic acid, acrylamide, crotonic acid and crotonic anhydride, more p...

Embodiment 1

[0059] (1) 200 parts by weight of acrylic acid monomer, 300 parts by weight of acrylic acid monomer, 300 parts by weight of sodium hydroxide solution and 250 parts by weight of water are neutralized in a batching tank, and the degree of neutralization is controlled above 70%, to obtain a neutralized liquid ; Then add 0.15 parts by weight of allyl sucrose ether monomer, 350 parts by weight of kerosene and 20 parts by weight of Span 80 for mixing to obtain a mixed material liquid.

[0060] (2) Homogeneously emulsify the mixed material liquid obtained in step (1) for 30 min at a stirring speed of 8000 rpm by a high-efficiency homogenizer to obtain a mixed emulsion.

[0061] (3) Control the thickness of the mixed emulsion obtained in step (2) to 2cm-3cm, and irradiate electron beams to 12kGy to obtain a homogeneous paste; then conduct concentration treatment at 85°C for 25min to obtain a polyacrylic acid thickener.

[0062] After testing (the specific testing method is: NDJ-79 rot...

Embodiment 2

[0064] (1) 200 parts by weight of acrylic acid monomer, 320 parts by weight of sodium hydroxide solution and 260 parts by weight of water in the batching tank are neutralized, and the degree of neutralization is controlled above 70% to obtain neutralized liquid ; Then add 0.18 parts by weight of pentaerythritol trienyl acrylate monomer, 300 parts by weight of kerosene, 60 parts by weight of white oil and 25 parts by weight of Span 80 for mixing to obtain a mixed material liquid.

[0065] (2) Homogeneously emulsify the mixed material liquid obtained in step (1) for 30 minutes with a high-efficiency homogenizer at a stirring speed of 10,000 rpm to obtain a mixed emulsion.

[0066] (3) Control the thickness of the mixed emulsion obtained in step (2) to 2cm-3cm, and irradiate 15kGy of electron beams to obtain a homogeneous paste; then conduct concentration treatment at 85°C for 20min to obtain a polyacrylic acid thickener.

[0067] After testing, the 1% viscosity of the thickener ...

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Abstract

The invention provides a preparation method of a polyacrylic acid thickener, comprising the following steps: a) mixing an alkenoic monomer, lye, water, a crosslinking agent, an emulsifier and a solvent to obtain a mixed material liquid; The alkenoic acid-based monomer includes one or more of acrylic acid, methacrylic acid, acrylamide, crotonic acid and crotonic anhydride; b) homogeneously emulsifying the mixed material liquid obtained in step a) to obtain a mixed Emulsion; c) irradiating the mixed emulsion obtained in step b) with electron beams to obtain a homogeneous paste; and then condensing to obtain a polyacrylic acid thickener. Compared with the prior art, the preparation method provided by the present invention uses a mixture liquid of a specific composition to be homogeneously emulsified and irradiated with electron beams to prepare a polyacrylic acid thickener; the preparation method does not require nitrogen to drive oxygen and By adding an initiator, the polyacrylic acid thickener can be quickly synthesized at normal temperature, and the prepared product has high viscosity and stable performance.

Description

technical field [0001] The invention relates to the technical field of thickeners, in particular to a polyacrylic acid thickener and a preparation method thereof. Background technique [0002] Acrylic polymers are a cost-effective synthetic thickener. The polyacrylic acid thickener is applied to the textile printing process, and its use in combination with the color paste has the advantages of deep color and high utilization of the color paste. This type of thickener is small in dosage, easy to clean, and has thixotropy in viscosity. Its viscosity can decrease under shear stress, and it can return to the original viscosity when the stress is removed. This characteristic makes the viscosity of the acrylic thickener decrease under the pressure of the doctor blade to facilitate penetration, and the viscosity is restored without overflow after the doctor blade is removed. [0003] The anionic polyacrylic acid thickener is a polymer electrolyte compound, a copolymer with a slig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F216/14C08F222/20C08F222/38D06P1/52
CPCD06P1/5257C08F220/06C08F222/104C08F216/1416
Inventor 郑庆信肖峰朱南康张恒斌邵晓
Owner CGN DASHENG ELECTRON ACCELERATOR TECH