Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of preparation method and application of viscosity reducing rheological agent for papermaking coating

A rheological agent and viscosity reduction technology, applied in papermaking, paper coatings, textiles and papermaking, etc., can solve problems such as drop, and achieve good viscosity reduction effect and uniform molecular weight distribution.

Active Publication Date: 2021-04-23
ZHEJIANG JIUBEN BIOCHEM
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing rheological agent technology, to provide a preparation of a new type of viscosity-reducing rheological agent for papermaking coating, to improve the dispersibility of high-solid coatings, with the increase of shear rate , paint viscosity drops

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method and application of viscosity reducing rheological agent for papermaking coating
  • A kind of preparation method and application of viscosity reducing rheological agent for papermaking coating
  • A kind of preparation method and application of viscosity reducing rheological agent for papermaking coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 130g of water, 5g of maleic anhydride and 10g of itaconic acid into a four-neck flask, raise the temperature to 60-70°C and stir to dissolve, dissolve 6g of 2-acrylamide-2-methylpropanesulfonic acid, 1g of benzyl acrylate, Mix and dissolve 100g of acrylic acid and 20g of water, and wait for use. At the same time, dissolve 2g of ammonium persulfate into 16g of water to prepare an oxidizing agent solution, and dissolve 3g of sodium metabisulfite into 30g of water to prepare a reducing agent solution. When the temperature is between 70-80°C, At the same time, drip the oxidant solution, the reducing agent solution, and drop the mixed functional monomers into the above-mentioned four-necked flask to participate in the reaction, control the temperature at 80-95°C for 60-120 minutes, and then keep the temperature for 20-50 minutes; add 15g poly Ethylene glycol (M W =1000) dissolution reaction, the temperature is reacted at 80-95°C for 30-50min; the temperature is lowered t...

Embodiment 2

[0029] Add 120g of water, 2.5g of maleic anhydride and 5g of itaconic acid into a four-neck flask, raise the temperature to 60-70°C and stir to dissolve, dissolve 5g of 2-acrylamide-2-methylpropanesulfonic acid, 2g of 2-vinylpyridine , 110g of acrylic acid and 20g of water are mixed and dissolved, set aside, at the same time, dissolve 2g of ammonium persulfate in 16g of water to prepare an oxidizing agent solution, dissolve 3g of sodium metabisulfite in 30g of water to prepare a reducing agent solution, and wait until the temperature is between 70-80°C At the same time, drop the oxidant solution, the reducing agent solution, and drop the mixed functional monomers into the above-mentioned four-necked flask to participate in the reaction, control the temperature at 80-95°C for 60-120 minutes, and then keep the temperature for 20-50 minutes; add 10g polyethylene glycol (M W =1500) dissolution reaction, the temperature is reacted at 80-95°C for 30-50min; the temperature is lowered...

Embodiment 3

[0031] Add 130g of water, 4g of maleic anhydride and 8g of itaconic acid into a four-neck flask, raise the temperature to 60-70°C and stir to dissolve, dissolve 6g of 2-acrylamide-2-methylpropanesulfonic acid, 3g of benzylmethyl acrylate, Mix and dissolve 100g of acrylic acid and 20g of water, and wait for use. At the same time, dissolve 2g of ammonium persulfate in 16g of water to prepare an oxidizing agent solution, and dissolve 2.5g of sodium metabisulfite in 30g of water to prepare a reducing agent solution, and wait until the temperature is between 70-80°C At the same time, dropwise add oxidant solution, reducing agent solution, and drop mixed functional monomers to the above-mentioned four-necked flask to participate in the reaction, control the temperature at 80-95°C and add dropwise for 60-120min, then keep warm for 20-50min; add 20g polyethylene glycol (M W =2000) dissolution reaction, the temperature is reacted at 80-95°C for 30-50min; the temperature is lowered to b...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a preparation method of a viscosity-reducing rheology agent for papermaking coating, which comprises acrylic acid, maleic anhydride, itaconic acid, 2-acrylamide-2-methylpropanesulfonic acid and a functional monomer mixed solution. Also add polyethylene glycol, water, oxidizing agent, reducing agent and liquid caustic soda 48% in the reaction. It is prepared through the following steps: slowly drop functional mixed monomers into the base material, adjust the temperature to 70-95°C, initiate copolymerization by oxidation and reduction system, drop reaction for 60-120 minutes, keep warm for 20-50 minutes, and then After adding polyethylene glycol to react for about 30-50 minutes, the reaction is over, lower the temperature to below 40°C, and neutralize with liquid caustic soda as needed; It can greatly reduce the high-shear viscosity, reduce the dosage of dispersant, and reduce the cost; it adopts precise molecular weight control and rigid structure design of the main chain to reduce the viscosity of the coating and increase the solid content of the coating, thereby increasing the vehicle speed and reducing energy consumption.

Description

technical field [0001] The invention relates to a preparation method and application of a novel viscosity-reducing rheology agent that can be used for coated paper in the papermaking industry Background technique [0002] The modern paper-making industry is developing towards large-scale and high-speed paper machines, and coatings are also developing towards higher solid content. The solid content of some coatings has reached more than 70%, which gives the rheological agent used for paper coating. Performance has put forward higher requirements, and at the same time, the research on coating formulations for coated paper has encountered new problems. [0003] Coating is a dispersion system composed of pigment, latex and water. This system can be regarded as a multi-phase system of suspension. An ideal coating should meet the process requirements of different sections such as pumping, feeding, metering, reflux and flow. . This requires an analysis of the hydrodynamic propert...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/02C08F220/06C08F222/06C08F222/02C08F220/58C08F220/18C08F226/06C08F4/40D21H21/06D21H19/16D21H19/14
CPCD21H19/14D21H19/16D21H21/06C08F4/40C08F220/06C08G81/025C08F222/06C08F222/02C08F220/585C08F220/1807C08F226/06
Inventor 郑保键
Owner ZHEJIANG JIUBEN BIOCHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com