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Weak acid rosin emulsion gluing agent and its common technology

A rosin emulsion and weakly acidic technology, which is applied in the direction of rosin addition, water repellent addition, inorganic compound addition, etc., can solve the problems of high content of impurity ions, unsatisfactory water quality, and increased sizing cost, so as to achieve good sizing effect , Improve the operation of the paper machine and reduce the consumption

Active Publication Date: 2008-12-24
HANGZHOU HANGHUA HARIMA PAPER CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(3) The paper machine is developing towards large-scale and high-speed, but there are still a large number of small and medium-sized paper mills. The water quality of these paper mills is often not ideal, with high hardness and high content of impurity ions
But relatively mature product on the market has only acidic emulsion rosin sizing agent (as " a kind of low-foaming, high-efficiency dispersion rosin size " disclosed in Chinese patent document CN1116361C) and neutral emulsion rosin sizing agent, and their optimal pH uses The ranges are 4.5-5.5, 7-8; if the current acidic or neutral emulsion rosin sizing agent is used in a weakly acidic environment, the sizing degree will decrease, the sizing cost will increase, and there will be many problems such as foam

Method used

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  • Weak acid rosin emulsion gluing agent and its common technology
  • Weak acid rosin emulsion gluing agent and its common technology
  • Weak acid rosin emulsion gluing agent and its common technology

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0047] Synthesis Example 1. Add 200 parts of deionized water and 3 parts of emulsifier sodium lauryl polyoxyethylene ether (N=8) sulfonate to a reaction device equipped with a stirrer, a thermometer, a nitrogen conduit and a reflux condenser, and heat to 40°C After stirring and dissolving, add 3 parts of ammonium persulfate, 2 parts of dodecanethiol, 15 parts of butyl acrylate, 35 parts of acrylic acid, 20 parts of styrene, and 15 parts of methyl methacrylate, start stirring; and gradually raise the temperature to 85 °C, React at 85-95°C for 4 hours, cool to 65°C, add NaOH to neutralize to pH=8-9. Add deionized water to make the solid content 18% to obtain polymer emulsifier A1.

[0048] Synthesis Examples 2-5. The synthesis process is the same as that in Synthesis Example 1, and the composition ratio is shown in Table 1 to obtain polymer emulsifiers A2-A5.

Synthetic example 1-5

[0049] Synthetic examples 1-5 (parts by weight) of table 1, polymer emulsifier

[0050]

combine

become

example

persulfate

Emulsifier *

benzene

Second

ene

Methacrylic

acid and / or

acrylic

Alkyl Acrylate

ester

Alkyl methacrylate

base ester

twelve

Mercaptan

Add water to

Solid content

Take up%

1

Ammonium persulfate

3

emulsifier one

3

20

acrylic

35

Butyl acrylate

15

Butyl methacrylate

Ester 15

2

18

2

potassium persulfate

1

emulsifier two

2

5

acrylic

45

ethyl acrylate

20

Methacrylate

Ester 25

2

20

3

sodium persulfate

5

emulsifier three

4

15

Methacrylic

Acid 20

Isooctyl acrylate

Ester 2...

Synthetic example 6-9

[0062] Table 3, Synthesis Examples 6-9 (parts by weight) of weak acid-resistant composite emulsifier (C)

[0063] Synthesis example

Low Molecular Emulsifier

polymer emulsifier

The mixing ratio

Weak acid resistant compound emulsifier

1

B1

A1

2.8∶6

C1

2

B2

A2

1.5∶6

C2

3

B3

A3

1.0∶7

C3

4

B4

A4

2.8∶7

C4

5

B5

A5

1.0∶9

C5

[0064] 4. Synthesis example of weak acid resistant resin

[0065] The preparation of Fuma modified rosin, in rosin, stirrer is housed, thermometer, in the modified kettle of heating device, nitrogen conduit and reflux condenser, the natural rosin of heating 100 parts (weight) (start stirring simultaneously), be warming up to 180 ℃, add 12 parts of fumaric acid, raise the temperature to 200-210 ℃ and react for 3-4 hours, and discharge the material after confirming that ...

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PUM

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Abstract

The present invention relates to a rosin milk sizing agent and sharing technology used for internal sizing under subacidity (pH 6.0-7.5) condition. Said invented sizing agent is composed of subacidity resisting composite emulsifying agent 1.8-15, weakly acidic resin resisting 15-60, emulsion stabilizer 0.1-3, water added to make total solid content reaching 20-60 per cent; said subacidity resisting composite emulsifying agent made from high polymer emulsifying agent : low molecule emulsifying agent.

Description

technical field [0001] The invention relates to an auxiliary agent for papermaking, in particular to a rosin emulsion sizing agent used for internal pulp sizing under weakly acidic (PH value 6.0-7.5) conditions and a common technology thereof. Background technique [0002] Emulsion rosin sizing agent for papermaking is a new type of sizing agent for papermaking. It is used for pulp sizing in the papermaking industry, replacing the traditional saponified rosin size. It has the advantages of high sizing efficiency, good economic benefits, and significant environmental benefits. my country has successfully developed the first generation of emulsion rosin sizing agent since the early 1990s and put it into mass production. However, with the development of the paper industry and the improvement of environmental protection requirements, the protection and lack of forest resources, and the actual situation of using a large amount of waste paper pulp in my country, when using the firs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16D21H17/66D21H17/03D21H17/14D21H17/62D21H21/50
Inventor 吕建平汪曾祁中田智彦吕英杰岩佐良明王从贤
Owner HANGZHOU HANGHUA HARIMA PAPER CHEM