Preparation of cation polymer emulsifier for AKD

A polymer emulsifier and cationic technology, which is applied in the field of polymer chemistry, can solve the problems of low retention rate reactivity, diminished sizing effect, and reduced strength performance, so as to avoid deterioration of sizing effect and stability, and protect the environment. The effect of improving and improving waterproofness

Inactive Publication Date: 2008-11-12
SHAANXI UNIV OF SCI & TECH
View PDF0 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The emulsion prepared by the above-mentioned surfactants has many foams and poor stability. Due to the large amount of cationic starch used, problems such as mold and deterioration are prone to occur at high temperatures.
Moreover, the retention rate of the prepared AKD emulsion on the fiber and its reactivity with the fiber are low, so the sizing effect is prone to decline, and the strength performance of the paper is reduced after sizing

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Add polyvinyl alcohol 0588 and deionized water into a drying reactor at a mass ratio of 1:10, heat to 80°C, keep warm for 3 hours to completely dissolve the polyvinyl alcohol in the reactor, and then cool down to room temperature Prepare polyvinyl alcohol aqueous solution A;

[0012] 2) The hard oil-soluble vinyl monomer methyl methacrylate, the soft oil-soluble vinyl monomer ethyl acrylate, the cationic monomer methacryloyloxyethyltrimethylammonium chloride, and the hydrophilic vinyl The monomer methylol acrylamide is mixed separately according to the mass ratio of 1:0.2:0.3:0.2, the hard oil-soluble vinyl monomer and the soft oil-soluble vinyl monomer are mixed to obtain solution C, the cationic monomer and the hydrophilic vinyl monomer The base monomers are mixed to obtain solution D;

[0013] 3) Mix the deionized water and the water-soluble initiator ammonium persulfate in a mass ratio of 1:0.005 to obtain the initiator aqueous solution E;

[0014] 4) T...

Embodiment 2

[0015] Example 2: Add polyvinyl alcohol 1099 and deionized water into a dry reactor at a mass ratio of 1.5:10, heat to 100°C, keep warm for 1 hour to completely dissolve the polyvinyl alcohol in the reactor, and then cool down to room temperature Prepare polyvinyl alcohol aqueous solution A;

[0016] 2) Hard oil-soluble vinyl monomer ethyl methacrylate, soft oil-soluble vinyl monomer n-butyl acrylate, cationic monomer methacryloxyethyl dimethyl benzyl ammonium chloride, hydrophilic Diacetone acrylamide, a permanent vinyl monomer, was mixed in a mass ratio of 1:3:0.1:0.1, and a hard oil-soluble vinyl monomer and a soft oil-soluble vinyl monomer were mixed to obtain solution C, cationic monomer and hydrophilic Permanent vinyl monomers are mixed to obtain solution D;

[0017] 3) Mix deionized water and water-soluble initiator potassium persulfate in a mass ratio of 1:0.1 to obtain an aqueous initiator solution E;

[0018] 4) Take less than half of solution C, solution D and ini...

Embodiment 3

[0019] Example 3: Add polyvinyl alcohol 1750 and deionized water into a dry reactor at a mass ratio of 3:10, heat to 90°C, keep warm for 2 hours to completely dissolve the polyvinyl alcohol in the reactor, and then cool down to room temperature Prepare polyvinyl alcohol aqueous solution A;

[0020] 2) Hard oil-soluble vinyl monomer isopropyl methacrylate, soft oil-soluble vinyl monomer n-propyl acrylate, cationic monomer acryloyloxyethyltrimethylammonium chloride, hydrophilic vinyl Monomer acrylamide is mixed separately at a mass ratio of 1:7:0.5:0.3, hard oil-soluble vinyl monomer and soft oil-soluble vinyl monomer are mixed to obtain solution C, cationic monomer and hydrophilic vinyl monomer Mix to obtain solution D;

[0021] 3) Mix deionized water and water-soluble initiator ammonium persulfate-sodium (bisulfite) in a mass ratio of 1:0.5 to obtain initiator aqueous solution E;

[0022] 4) Take less than half of solution C, solution D and initiator aqueous solution E and a...

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 discloses a method for preparing AKD cationic macromolecular emulsifier, comprising the following steps: adequate acrylic acid long-chain fatty esters and adequate vinyl monomers such as cationic monomers and so on are selected according to the physicochemical properties of binding compositions; free-radical nonsoap latex copolymerization is performed in water solution by adoption of the seeding polymerization method under the condition that modified polyvinyl alcohol exists; and the AKD cationic macromolecular emulsifier is obtained. The AKD cationic macromolecular emulsifier can replace micromolecular emulsifier added into the prior AKD latex; the problems of easy foaming of the latex, poor stability and sizing effect and so on are solved; simultaneously the adhesion property and the anionic waste interference resistance of the emulsifier are greatly improved; not only the waterproofness of paper can be improved but also the physical strength of the paper can be improved; and no cationic starch is required to be added for colloid protectant during the preparing process of the emulsifier, thereby overcoming the defect of poor sizing effect and stability of the AKD latex due to easy deterioration of the emulsifier during the high-temperature and long-term storage process.

Description

technical field [0001] The invention belongs to the field of polymer chemistry, in particular to a preparation method of a cationic AKD polymer emulsifier. Background technique [0002] The application of neutral sizing in domestic and foreign papermaking enterprises has become more and more extensive. Compared with acid sizing, its advantages are becoming more and more obvious in terms of improving product quality, reducing overall cost, and favoring the market and users. Practice has proved that AKD has become the most mature and effective neutral sizing agent used by domestic paper mills. Due to the characteristics of AKD's high activity and easy hydrolysis, the formulation of its emulsion should not only solve the problem of emulsification, but also solve the problem of its stability. At present, AKD commonly used emulsifiers include natural polymers and surfactants such as sodium lignosulfonate and cationic starch. Surfactants mainly include higher fatty acids, higher...

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 Applications(China)
IPC IPC(8): C08L33/04C08L33/20C08L29/04C08F220/10C08F220/44C08F2/22C08F8/44C08F116/06B01F17/52D21H21/16C09K23/52
Inventor 费贵强沈一丁王海花
Owner SHAANXI UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap