A kind of preparation method of in-situ polymerization solid thickener

A technology of in-situ polymerization and thickening agent, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of large equipment investment and energy consumption, cumbersome manufacturing process, inconvenient use, etc., and achieve convenient transportation and good storage. Stability, good thickening effect

Active Publication Date: 2022-03-04
SUZHOU BONA CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the liquid thickener has the advantages of high cost performance and stable performance, it is inconvenient to use in the production process, and the market strongly needs to change the existing liquid thickener into a solid thickener.
[0003] To change the liquid thickener into a solid thickener, the conventional preparation method is to synthesize the liquid thickener first, and then prepare the solid thickener through spray drying and other processes. Large, the dissolution rate is slow when used, especially the alkali-swellable associative thickener, which cannot be neutralized with alkali during synthesis, and the water solubility is poor after drying, and it is difficult to penetrate when neutralizing with alkali in the later stage. lead to poor performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Raw material formula: sodium methacrylate (aqueous solution with a mass concentration of 52%): 245g, ethyl acrylate: 120g, butyl acrylate: 20g, isooctyl acrylate: 15g, initiator ammonium persulfate (a mass concentration of 5% aqueous solution): 3g, emulsifier (NP-9: 11g, CO-436: 11g), polyurethane associative macromonomer (BA-40: 5g, BA-25: 10g), fumed silica (A200): 315g

[0034] Process steps:

[0035] 1. Premixing of raw materials: 245g of 52% sodium methacrylate aqueous solution, 120g of ethyl acrylate, 20g of butyl acrylate, 15g of isooctyl acrylate, polyurethane associative macromonomer (BA-40: 5g , BA-25: 10g), emulsifier (NP-9: 11g, CO-436: 11g), and 3g of ammonium persulfate aqueous solution with a mass concentration of 5% are accurately weighed and added to the dripping kettle in sequence. Stir at the speed of 0.8 hours, fully mixed to become the standby mixed solution A;

[0036] 2. Preparation of carrier powder: Weigh 315g of fumed silica (A200) and add i...

Embodiment 2

[0043] Raw material formula: Potassium methacrylate (63% aqueous solution): 195g, ethyl acrylate: 135g, isooctyl acrylate: 35g, deionized water: 250g+50g+25g+300g, potassium persulfate (mass 5% aqueous solution): 4.5g, emulsifier (NP-9: 10g, CO-436: 8g, K-12: 2g, water: 10g), polyurethane associative macromonomer (BA-40: 4g, BA-15: 9g); white carbon black 517 (Jiangxi Huiming) 400g, calcium carbonate (2500 mesh) 150g;

[0044] Process steps:

[0045]1. Premixing of raw materials: 195g of potassium methacrylate aqueous solution with a mass concentration of 63%, 135g of ethyl acrylate, 35g of isooctyl acrylate, polyurethane associative macromonomer (BA-40: 4g, BA-15: 9g), emulsifier (NP-9: 10g, CO-436: 8g, K-12: 2g, water: 10g), 4.5g potassium persulfate aqueous solution with a mass concentration of 5% and add them to the dripping kettle in sequence , after the addition is complete, stir at a speed of 100rpm for 1 hour, and fully mix to become the standby mixed solution A;

...

Embodiment 3

[0053] Raw material formula: ammonium methacrylate (55.7% aqueous solution): 205g, ethyl acrylate: 160g, ammonium persulfate (5% aqueous solution): 3g, emulsifier (NP-9: 8g, CO-436: 15g), BA-40: 15g; fumed silica (A380): 275g, silica (517): 130g

[0054] Process steps:

[0055] 1. Premixing of raw materials: 205g ammonium methacrylate aqueous solution, 160g ethyl acrylate, polyurethane associative macromonomer (BA-40: 15g), emulsifier (NP-9: 8g, CO-436: 15g) , 3g initiator aqueous solution is accurately weighed and added to the dripping kettle successively, after the addition is completed, stir at a speed of 120rpm for 0.5 hour, and become standby mixed solution A after fully mixing;

[0056] 2. Preparation of carrier powder: Weigh 275g of fumed silica (A380#) and 130g of silica (517) and add them to the powder mixing equipment in turn, stir for 1 hour at a speed of 35rpm, and mix them thoroughly to become spare materials B;

[0057] 3. Spray adsorption: Add the spare mixed...

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Abstract

The invention discloses a preparation method of an in-situ polymerized solid thickener, which comprises the following steps: premixing an aqueous solution of methacrylic acid salt, an acrylate and polyurethane associative macromonomer, an emulsifier, and an aqueous solution of an initiator; Spray adsorption on the carrier powder; age at room temperature for 2-4 hours, gradually heat up to 70-95°C in the powder equipment, and vacuumize at 95-100°C for 0.5-1 hour; cool down to below 40°C, pass the test Afterwards, it can be obtained by crushing, screening and discharging. The in-situ polymerized solid thickener prepared by the present invention is a new type of solid thickener, which has the characteristics of environmental protection, safety, excellent performance, stable storage, and convenient transportation. It improves the types of domestic thickener products; the preparation of the present invention The method has simple process and is easy to realize large-scale production.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a preparation method of an in-situ polymerized solid thickener. Background technique [0002] Due to the development of science and technology, various building materials are changing with each passing day. In recent years, the trend of water-based and powder-based has led the mainstream of the market. Most dry powder mortar and dry powder putty need thickeners to thicken during production and use. There are many kinds of thickeners, mainly including solid thickeners, natural organic thickeners and liquid thickeners, among which solid thickeners are mainly inorganic thickeners, such as bentonite, attapulgite, etc.; natural organic thickeners Agents such as modified starch, modified cellulose, etc.; liquid thickeners such as emulsion thickeners, polyurethane thickeners, etc. Although liquid thickeners have the advantages of high cost performance and stable performance, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/00C08F220/06C08F220/18C08F2/44C08K3/36C08K3/26C09K3/00
CPCC08F283/008C08K3/36C08K3/26C09K3/00C08K2003/265C08F2/44C08F220/06
Inventor 李维格钱建峰刘钫
Owner SUZHOU BONA CHEM TECH
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