Thickener copolymer as well as preparation method and application thereof

A technology for copolymers and thickeners, applied in the field of new thickeners containing polyether structural units and their preparation, can solve the problems of poor thickening and water retention, incompatibility, etc., and achieve initial fluidity and flow over time The effect of small size, controllable quality and simple process route

Inactive Publication Date: 2014-02-05
SHANGHAI SUNRISE POLYMER MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although there are many types of thickener products available in the domestic and foreign markets, when used in mortar or concrete thickening and water-retaining agents, either the thickening and water-retaining effect is poor, or it is incompatible with other concrete admixtures. Substitute concrete water reducer polycarboxylate high-performance water reducer is especially outstanding when used together

Method used

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  • Thickener copolymer as well as preparation method and application thereof
  • Thickener copolymer as well as preparation method and application thereof
  • Thickener copolymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Add 500.0g of A-1 and 837.0g of water into a 2000ml four-necked flask equipped with a stirrer, a thermometer, and a dropping device, stir and heat up to 40°C, and add 12.0g of 35% hydrogen peroxide. At the same time, 101.0g vitamin C aqueous solution (obtained by dissolving 1.0g vitamin C in 100.0g water) and 400.0g monomer aqueous solution (obtained by dissolving 100.0g B-1 in 300.0g water) were added dropwise, and the dropping time was controlled at 20 minutes. The reaction temperature is controlled at 40-60°C. After the dropwise addition, the stirring was stopped, and the temperature was kept at 40-60° C. for 240 minutes to complete the polymerization reaction. After the heat preservation, 150.0g of 30% NaOH aqueous solution was added to obtain the thickener PA-1 with a solid content of about 31.0% and a weight average molecular weight of 850,000.

Embodiment 2

[0052] Add 570.0g of A-2, 30.0g of B-3, and 1148.2g of water into a 2000ml four-neck flask equipped with a stirrer, a thermometer, and a dropping device, stir and control the temperature at 20°C, and add 1.2g of ammonium persulfate. 100.6g vitamin C aqueous solution (obtained by dissolving 0.6g vitamin C in 100.0g water) was added dropwise, the dropping time was controlled at 10 minutes, and the reaction temperature was controlled at 20-30°C. After the dropwise addition, the stirring was stopped, and the temperature was kept at 20-30° C. for 300 minutes to complete the polymerization reaction. After the heat preservation is over, add 150.0g of 30% KOH aqueous solution to obtain thickener PA-2 with a solid content of about 31.3% and a weight average molecular weight of 280,000.

Embodiment 3

[0054] Add 100.0 g of A-3 and 1194.0 g of water into a 2000 ml four-necked flask equipped with a stirrer, a thermometer and a dropping device, stir and control the temperature at 50°C. At the same time, 106.0g aqueous initiator solution (obtained by dissolving 6.0g 2,2'-azobis(2-amidinopropane) hydrochloride in 100.0g water) and 600.0g monomer aqueous solution (obtained by dissolving 250.0g B-1, 50.0g of B-2 dissolved in 300.0g of water), the dropping time is controlled at 30 minutes, and the reaction temperature is controlled at 40-60°C. After the dropwise addition, stop stirring and keep warm at 40-60°C for 300 minutes to complete the polymerization reaction to obtain thickener PA-3 with a solid content of about 20.3% and a weight-average molecular weight of 625,000.

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Abstract

The invention discloses a thickener copolymer as well as a preparation method and an application thereof. The thickener copolymer contains a structural unit I derived from an unsaturated polyether monomer and a structural unit II derived from an unsaturated carboxylic acid monomer. The preparation method comprises the step of copolymerizing the unsaturated polyether monomer (A) shown by the general formula (3) with the unsaturated carboxylic acid monomer (B) shown by the general formula (4) under the existence of an initiator. When the thickener copolymer is used for cement mortar or concrete, the thickener copolymer has the good water-retaining property and simultaneously has the good intermiscibility with a polycarboxylate superplasticizer.

Description

technical field [0001] The invention relates to a thickener copolymer, in particular to a novel thickener containing polyether structural units and its preparation method and application. Background technique [0002] Thickener is a rheological additive widely used in coatings, textile printing paste, dyeing and finishing and chemical building materials and other fields. Water-based thickeners can be divided into non-associative and associative thickeners according to their thickening mechanism. The former thickener molecule has no hydrophobically modified monomer, so there is no association with the polymer to be thickened. It is mainly thickened by dissolving the thickener polymer in alkali, and sometimes through light dissolving after alkali dissolution. The degree of cross-linking forms a certain network structure in water to achieve thickening. Associative thickeners are generally polymers that use hydrophobic group-containing functional monomers to hydrophobically mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C04B24/26C04B103/46
Inventor 冯中军傅乐峰
Owner SHANGHAI SUNRISE POLYMER MATERIAL CO LTD
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