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Dispersion liquid of polymer in use for papermaking, preparation method and application

A technology of dispersion liquid and polymer, applied in papermaking, textile and papermaking, inorganic compound addition, etc., can solve the problem that the effect of reinforcing agent is not ideal.

Active Publication Date: 2010-05-19
杭州市化工研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the effect of these two types of enhancers is not ideal enough

Method used

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  • Dispersion liquid of polymer in use for papermaking, preparation method and application

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Embodiment 1

[0018] A 250ml four-neck glass reactor is equipped with a feeding dropping funnel, a thermometer, a nitrogen inlet tube, a water condenser and a stirrer. The reactor was placed in a constant temperature water bath, styrene 32g (4%), butyl acrylate 19.2g (2.4%), acrylonitrile 6.4g (0.8%), acrylic acid 6.4g (0.8%) were mixed to obtain liquid [I]. Add 0.36 g of potassium persulfate to 20 g of deionized water to obtain liquid [II]. First add 73g of deionized water, 0.52g of sodium lauryl sulfate, and 2.58g of TX-10 into the reactor, stir well, then add 1 / 3 of liquid [I] and 1 / 3 of liquid [II], blow nitrogen, Stir, heat up to 85°C and react for 20 minutes, then add liquid [I] and liquid [II] dropwise at the same time, drop it at 85°C within 3 hours, keep warm for 1 hour to complete the reaction and discharge.

[0019] A 1000ml four-neck glass reactor is equipped with a feeding dropping funnel, a thermometer, a nitrogen inlet tube, a water condenser and a stirrer. The reactor is p...

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Abstract

The present invention relates to a polymer dispersion liquor for making paper, its preparation method and application of said dispersion liquor. Said dispersion liquor composition includes (by wt %) 3-12% of hydrophobic monomer (styrene, butadiene, acrylate, methyl acrylate, acrylonitrile, vinyl acetate and divinylbenzene, etc.). 8-17% of water-soluble monomer (acrylic acid, methyl acrylic acid, itaconic acid, acrylamide, fumaric acid, N, N'-methylene diacrylamide and N-hydroxymethyl acrylamide) and the rest is water. Its preparation method includes the following steps: firstly, utilizing hydrophobic monomer and acrylic acid or fumaric acid to produce polymerization reaction to obtain latex, and then adding the obtained latex into water-soluble copolymer solution obtained by interpolymerization of water-soluble monomer, more adding water-soluble monomer and catalyst to make cross-linking reaction.

Description

technical field [0001] The invention relates to an additive added to paper and cardboard by a surface impregnation method to improve the dry strength of the paper and cardboard, in particular to a polymer dispersion for papermaking, a preparation method thereof, and an application of the dispersion. Background technique [0002] In the patent reports on the addition of polymer dispersions as dry strengthening agents for paper through surface sizing, there are two main types: one is basically to obtain polymer dispersions by copolymerization of hydrophobic monomers and starch, and then use surface sizing methods to obtain polymer dispersions. Add it to paper and cardboard to improve the dry strength of paper. U.S. Patent UP6753377 introduces adding vinyl monomers into the starch dispersion, adding catalysts for copolymerization, and adding it to paper and cardboard through surface sizing as a strengthening agent for paper. The second: water-dispersed polymer dispersion obtain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/18D21H17/04D21H17/14D21H17/07D21H17/66D21H21/18
Inventor 贺贤璋朱艳
Owner 杭州市化工研究院有限公司