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Reinforcing agent of amphoteric polyacrylamide cardboard paper

A technology of polyacrylamide and cardboard paper, applied in the direction of reinforcing agent addition, paper, papermaking, etc., can solve problems such as production operation and environmental pollution, volatile acrylonitrile, high toxicity, etc., to improve safety and environmental protection, improve reinforcement effect, the effect of increasing the degree of branching

Active Publication Date: 2010-03-10
ZHEJIANG TRANSFAR WHYYON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, it has developed into the era of polymerization using acrylonitrile as a non-ionic monomer. Acrylonitrile is a good polymer hard monomer, which can well cross-link polymers and play a certain role in the skeleton, so that the obtained amphoteric Polyacrylamide-based paper-making strengthening agents have better application effects, but acrylonitrile is also a highly toxic chemical, and there are great dangers and hazards in its production and operation
For example, the Chinese patent literature with publication number CN1388288A discloses a dry strength agent for amphoteric paper, which uses a sulfonic acid group unsaturated monomer as an anionic monomer, does not use a carboxylic acid group unsaturated monomer, and its nonionic monomer The dry strength agent for paper whose component is acrylonitrile shows that it has a good strengthening effect, but its reaction temperature is 80-90°C, and the boiling point of acrylonitrile under normal pressure is 77.3°C. At this reaction temperature, Acrylonitrile is extremely volatile, causing great pollution and harm to production operations and the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Put 1240kg of deionized water into the reactor, add 170.27kg of acrylamide, 25.18kg of methacryloyloxyethyltrimethylammonium chloride, and 12.59kg of acryloyloxyethyltrimethylammonium chloride in sequence under stirring , 1.00kg of acrylic acid, 6.79kg of 2-acrylamido-2-methylpropanesulfonic acid, 14.32kg of methyl acrylate, 0.2136kg of pentaerythritol, adjust the pH value of the system to 3.5 with sodium carbonate solution, and flush out the mixed solution with nitrogen gas Dissolved oxygen, and heated to raise the temperature of the system to 70-80°C, add 67.68kg of 1% potassium persulfate solution dropwise to the reaction kettle, and the dropwise addition is completed within 1h, then raise the temperature of the reaction system to 90°C, keep it warm Cool down after 3 hours of reaction. A papermaking reinforcing agent with a viscosity of 5579CP was obtained.

Embodiment 2

[0022] Put 881.4kg of deionized water into the reaction kettle, add 144.0kg of acrylamide, 3.9kg of N-vinylpyrrolidone, 5.4kg of methacryloyloxyethyltrimethylammonium chloride, acryloyloxyethyl Trimethylammonium chloride 3.2kg, itaconic acid 0.52kg, 2-acrylamido-2-methylpropanesulfonic acid 1.20kg, methyl methacrylate 13.3kg, triethanolamine 0.298kg, adjusted with sodium phosphate solution When the pH value of the system is 4.0, nitrogen gas is introduced to take out the dissolved oxygen in the mixed liquid, and the temperature of the system rises to 70-80°C when heated, and 54 kg of 1% potassium persulfate solution is added dropwise to the reaction kettle, and the dropwise addition is completed within 1 hour , then raise the temperature of the reaction system to 90°C, and then lower the temperature after 3 hours of reaction. A papermaking strengthening agent with a viscosity of 6541CP was obtained.

Embodiment 3

[0024] Put 1031.5kg of deionized water into the reaction kettle, add acrylamide 108kg, methacryloxyethyltrimethylammonium chloride 39.9kg, acryloyloxyethyltrimethylammonium chloride 18.6kg , 2.7kg of acrylic acid, 7.77kg of 2-acrylamide 2-methylpropanesulfonic acid, 8.4kg of butyl acrylate, 0.261kg of sodium bisulfite, adjust the pH value of the system to 4.5 with sodium acetate solution, and take out the mixed solution to dissolve Oxygen, and when heating, the system temperature rises to 30°C, and 67.68 kg of 1% potassium persulfate solution is added dropwise to the reactor, and the dropwise addition is completed within 1 hour, and the temperature is lowered after 4 hours of reaction. Obtain the papermaking strengthening agent of viscosity 4859CP.

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Abstract

The invention discloses a reinforcing agent of amphoteric polyacrylamide cardboard paper. In the existing reinforcing agents, some have unobvious reinforcing effect, and some have extremely great pollution and damage to the environment. The reinforcing agent is prepared by deionized water, anion monomer, cation monomer, non-ion monomer, pH adjusting agent and an initiating system, and is characterized in that: the anion monomer selects the mixture of carboxylic group unsaturated monomer and sulfonic group unsaturated monomer for use; and the non-ion monomer selects the mixture of acrylamide or acrylamide derivative and methyl methacrylate or methyl methacrylate derivative for use. The reinforcing agent has favorable reinforcing effect and greatly improves the safety and environment protection of production.

Description

technical field [0001] The invention relates to a water-soluble macromolecular material, in particular to an amphoteric polyacrylamide cardboard strengthening agent. Background technique [0002] Polyacrylamide water-soluble polymer materials have good water solubility, excellent viscosity increasing, and efficient flocculation, so they are widely used in flocculation, thickening, drag reduction, bonding, flow aid, reinforcement, scale inhibition, etc. In the field, amphoteric polyacrylamide-based water-soluble polymer materials cause charge adsorption of anion and cation groups, making them more suitable for sewage treatment, oil field collection, and papermaking. [0003] At present, polyacrylamide water-soluble polymer materials usually appear in the application field in the form of polymer aqueous solution, polymer gel, polymer dry powder, inverse emulsion, microemulsion or water-in-water solution. [0004] The patents on amphoteric multi-copolymerization polyacrylamide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/18D21H17/45D21H17/43
Inventor 赵立会竹百均赵世英梁福根姜莉章轶群
Owner ZHEJIANG TRANSFAR WHYYON CHEM
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