Self-emulsifying alkenyl succinic anhydride sizing agent and preparation method thereof

A technology of alkenyl succinic anhydride and alkenyl succinic acid, which is applied in the direction of water repellent addition, can solve heating and other problems, and achieve the effects of less dosage, convenient sizing, and convenient transportation and storage

Inactive Publication Date: 2013-07-10
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alkenyl succinic anhydride sizing agent simplifies the in-situ emulsification technology of alkenyl succinic anhydride to the greatest extent, but it needs to prepare a special emulsifier, and the mixing of the emulsifier and alkenyl succinic anhydride requires heating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Disperse 0.1 part of commercial nano-titanium dioxide (primary particle size 18 nm, anatase, hydrophilic type, water content less than 1%) into oily 100 parts of commercial olefin without surfactant under stirring at 50 rpm. In base succinic anhydride, stir for 30 minutes to obtain self-emulsifying alkenyl succinic anhydride sizing agent; take 100 parts of deionized water at a stirring speed of 5000 rpm, and add the above 100 parts of self-emulsifying alkenyl succinic anhydride at one time In the sizing agent, stir for 5 minutes to obtain an alkenyl succinic anhydride emulsion sizing agent with a solid content of about 50%.

[0017] Take 100 parts of beating degree is about 42 o Add 9900 parts of poplar bleached thermomechanical pulp of SR to water, after being decomposed by a fiber deflagging machine, add 1 part of the above-mentioned sizing agent, mix evenly to form a paper stock, and make a quantitative approx. 60g / m 2 After drying at 105°C for 10 minutes, the sizi...

Embodiment 2

[0019] Disperse 0.16 parts of commercial nano-titanium dioxide (primary particle size 18 nm, anatase, hydrophilic type) into 100 parts of oily surfactant-free commercial alkenyl succinic anhydride under stirring at 100 rpm, and stir for 25 Minutes to obtain self-emulsifying alkenyl succinic anhydride sizing agent; take 500 parts of deionized water at a stirring speed of 10000 rpm, add it to the above-mentioned 100 parts of alkenyl succinic anhydride sizing agent at one time, stir for 3 minutes, and obtain Alkenyl succinic anhydride emulsion sizing agent with a solids content of approximately 16.7%.

[0020] Take 100 parts of beating degree is about 42 o Add 9,900 parts of poplar bleached thermomechanical pulp of SR to water, and then add 3 parts of the above-mentioned sizing agent after being decomposed by a fiber deflagging machine. 60g / m 2 After drying at 105°C for 10 minutes, the sizing degree of the hand-written sheet was measured to be 128s by liquid penetration method ...

Embodiment 3

[0022] Disperse 0.4 parts of commercial nano-titanium dioxide (primary particle size 25nm, anatase: rutile ≈ 3:1, hydrophilic type) into 100 parts of commercial alkenyl amber in oily form with a small amount of surfactant under stirring at 250 rpm In the acid anhydride, stir for 20 minutes to obtain self-emulsifying alkenyl succinic anhydride sizing agent; take 700 parts of deionized water at a stirring speed of 500 rpm, and add the above 100 parts of self-emulsifying alkenyl succinic anhydride sizing agent at one time In the agent, stir for 20 minutes to obtain an alkenyl succinic anhydride emulsion sizing agent with a solid content of about 12.5%.

[0023] Take 100 parts of beating degree is about 42 o Add 9,900 parts of poplar bleached thermomechanical pulp of SR to water, and then add 3 parts of the above-mentioned sizing agent after being decomposed by a fiber deflagging machine. 60g / m 2 After drying at 105 °C for 10 min, the sizing degree of the hand-written sheet was ...

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Abstract

The invention relates to a sizing agent in the paper making field, in particular to a self-emulsifying alkenyl succinic anhydride sizing agent and a preparation method thereof; the self-emulsification alkenyl succinic anhydride sizing agent comprises nanometer titanium dioxide and alkenyl succinic anhydride. The nanometer titanium dioxide is hydrophilic, the particle diameter is smaller than 100 nm and the water content is smaller than 1%. The weight ratio of the nanometer titanium dioxide to the alkenyl succinic anhydride is 1:(20-1000). The preparation method comprises the step of adding the nanometer titanium dioxide into the alkenyl succinic anhydride under a stirring condition, wherein stirring speed preferably is 50-1000 r / m and stirring time is 1-30 min. The invention has the advantages that the preparation method is simple, fewer stabilizing agents are consumed and no any surfactants are added; and the prepared alkenyl succinic anhydride sizing agent nearly has no water, therefore no hydrolysis is generated, the transportation and storage are convenient, the onsite emulsifying and internal sizing are convenient, and the sizing efficiency is high.

Description

technical field [0001] The invention relates to a sizing agent in the field of papermaking, in particular to a self-emulsifying alkenyl succinic anhydride sizing agent and a preparation method thereof. Background technique [0002] Alkenyl succinic anhydride (ASA for short) is a commonly used neutral sizing agent for papermaking. It has the advantages of high reactivity, wide sizing pH range, good compatibility with alkaline fillers and aluminum salts, and high paper strength. It is suitable for It is suitable for the sizing of various papers and paperboards, especially papers and paperboards made from high-yield pulp and waste paper pulp that require in-machine aging and contain a large amount of anionic interfering substances. However, alkenyl succinic anhydride is easily hydrolyzed when exposed to water, and its hydrolyzate not only reduces the sizing efficiency of alkenyl succinic anhydride, but also easily forms problems such as deposition, which affects the normal oper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16
Inventor 刘温霞赵振环刘宗印王慧丽
Owner QILU UNIV OF TECH
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