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Preparation for starch grafted polyacrylamide and its derivative reversed-phase emulsion

A polyacrylamide and starch grafting technology, which is applied in the field of preparation of water-soluble polymer materials, can solve the problems of insoluble powder products, low polymer content, inconvenient use and storage, etc., and achieve fast dissolution and good dispersibility , The effect of low residual monomer content

Inactive Publication Date: 2005-12-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrosol products have low polymer content and are inconvenient to use and store; powder products are insoluble and require huge dissolving equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] In a 1000ml four-necked bottle equipped with a stirrer, temperature controller, and reflux condenser, first add 300g of paraffin oil, then add span-80 10g, span-60 7g, op-4 2g, stir to dissolve and pass N 2 20min; In addition, weigh 65g of starch and 50g of acrylamide, add 140g of water after mixing and stir to dissolve, pass N 2 After 10 minutes, add 0.15 g of ammonium persulfate and 0.3 g of urea, mix well and add to the oil phase, add ammonia solution under stirring to adjust the pH value to 8.5, under the protection of nitrogen, stir and heat up to 10°C to initiate polymerization, and react for 1 hour After reaching the temperature peak, heat-retain for 2 hours, then raise the temperature to 60°C, heat-retain for 4 hours, then hydrolyze and concentrate to obtain anionic starch-grafted polyacrylamide inverse latex. The product is a milky white viscous latex with a molecular weight of 4-7 million, a solid content of ≥30%, and a dissolution rate of ≤5 minutes. It is us...

Embodiment 2

[0010] In a 1000ml four-neck flask equipped with a stirrer, a temperature controller, and a reflux condenser, first add 300g of paraffin oil, then add 12g of span-80, 8g of span-60, and 3g of op-4, stir to dissolve and pass N 2 20min; In addition, weigh 65g of starch, acrylamide 45 and 10g of acrylic acid, mix and add 150g of water to stir to dissolve, and adjust the pH value to 8.5 with aqueous sodium hydroxide solution, and pass N 2 After 10 minutes, add 0.15 g of ammonium persulfate and 0.3 g of urea, mix well and add to the oil phase, under the protection of nitrogen, stir and heat up to 10°C to initiate polymerization, and react for 1 hour to reach the temperature peak, keep the temperature for 2 hours, and then add The temperature is raised to 60°C, and the reaction is kept for 4 hours, and then hydrolyzed and concentrated to obtain anionic starch-grafted polyacrylamide inverse latex. The product is a milky white viscous latex with a molecular weight of 4-7 million, a so...

Embodiment 3

[0012] In a 1000ml four-necked bottle equipped with a stirrer, temperature controller, and reflux condenser, first add 300g of paraffin oil, then add 12g of span-80, 8g of span-60, and 2g of op-4, stir to dissolve and pass N 2 20min; In addition, weigh 60g of starch, 50g of acrylamide and 10g of (meth)acryloyloxyethyltrimethylammonium chloride, add 143g of water after mixing and stir to dissolve, and adjust the pH value to 9.0 with aqueous sodium hydroxide solution, and pass N 2 After 10 minutes, add 0.15 g of ammonium persulfate and 0.3 g of urea, mix well and add to the oil phase. Under the protection of nitrogen, stir and heat up to 18°C ​​to initiate polymerization. After the reaction reaches the temperature peak for 1.5 hours, keep the reaction for 2 hours, and then The temperature is raised to 60°C, and the reaction is kept for 4 hours, and then hydrolyzed and concentrated to obtain cationic starch-grafted polyacrylamide inverse latex. The product is a milky white viscou...

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PUM

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Abstract

The invention discloses the preparation of a kind of starch grafting polyacrylamide (PAM) and its ramification, belonging to the preparation technology of water-soluble macromolecule materials. The method includes following process: add dehydrated sorbitol oleate, dehydrated sorbitol stearin and octylphenol polyoxyethylene ether (OPEO) into paraffin oil according to weight proportion, to prepare the continuous phase of emulsifier oil solution; mix starch and acrylamide (AM) or starch and AM and its ramification according to weight proportion, and dissolve them with water, to prepare the dispersed phase of solid shares of solution; add ammonium persulfate and urea, and add the dispersed phase into the continuous phase, then adjust pH by adding sodium hydroxide or ammonia; under nitrogen protection, mill to initiate polymerization at 5 - 30 Deg. C; then increase temperature to 45 - 60 Deg. C, react when keep the temperature; finally through hydrolyzing and purifying to prepare the inverse rubber latex of starch stem grafting polyacrylamide (PAM) and its ramification. The advantages of the invention are: the molecular structure of the prepared product has reasonable components, high and adjustable molecular weight; it's easy to operate, and has high conversion rate; the product has good dispersivity and high dissolving speed.

Description

technical field [0001] The invention relates to a preparation method of starch-grafted polyacrylamide and its derivatives, belonging to the preparation technology of water-soluble polymer materials. Background technique [0002] The polymer of starch grafted acrylamide and its derivatives is a kind of water-soluble functional polymer product, because it has the characteristics of high molecular weight, easy to form hydrogen bond, and can carry out various chemical reactions, so it has been applied in many fields. Development is extremely rapid. There are many types of products, including anion, cation, non-ionic and amphoteric four ionic dosage forms. Most of the products are 8-10% aqueous solution and powder. Hydrosol products have low polymer content and are inconvenient to use and store; powder products are insoluble and require huge dissolving equipment. The present invention avoids the above-mentioned deficiencies in the prior art and focuses on improving the polymer...

Claims

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Application Information

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IPC IPC(8): C08F251/00
Inventor 孙希明卢绍杰杨光中
Owner TIANJIN UNIV
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