Cationic tert-carbonic acid styrene-acrylic emulsion and preparation method thereof

A technology of carbonated styrene-acrylic milk and styrene-acrylic emulsion, which is applied in the direction of water-repellent addition, coating, paper coating, etc., and can solve problems such as troublesome operation

Active Publication Date: 2012-10-10
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, with the gradual increase of the proportion of secondary fibers in the raw materials for pulping and papermaking, and the increasing sealing degree of the white water cycle of the paper machine, the papermaking environment in the wet end is becoming increasingly harsh, and cationic surface sizing agents are increasingly favored by people. The current factory A weak anionic styrene-acrylic surface sizing agent is used as a special surface sizing agent to improve water resistance. During use, aluminum sulfate needs to be added to increase the retention rate of the surface sizing agent. The operation is more troublesome.

Method used

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  • Cationic tert-carbonic acid styrene-acrylic emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Synthesis of cationic tertiary carbonate styrene-acrylic emulsion:

[0025] a) 30g of n-butyl acrylate, 65g of styrene, 5g of acrylic acid and 10g of VeoVa9 are mixed to make a mixed monomer for subsequent use;

[0026] b) Dissolve 0.1g of ethylene glycol fatty acid ester, 0.06g of polyoxyethylene (20) sorbitan monooleate (Tween 80), and 0.2g of potassium persulfate in 10g of deionized water, and set aside;

[0027] c) Dissolve 0.9g (2,3) epoxypropyltrimethylammonium chloride (ETA) in 20 deionized water and set aside;

[0028] d) Add 0.5g ethylene glycol fatty acid ester, 0.2g polyethylene oxide (20) sorbitan monooleate (Tween 80), 0.3g potassium persulfate and 40g Dissolve deionized water into an aqueous solution, stir for 30 minutes, and set aside;

[0029] e) Add 0.06g of ethylene glycol fatty acid ester, 0.07g of polyethylene oxide (20) sorbitan monooleate (Tween 80), 0.2g of potassium persulfate and 23.6 In the aqueous solution of g deionized water, react at 70 ...

Embodiment 2

[0032] Synthesis of cationic tertiary carbonate styrene-acrylic emulsion:

[0033] a) Mix 20g of n-butyl acrylate, 75g of styrene, 5g of acrylic acid and 5g of VeoVa9 to make a mixed monomer for later use.

[0034] b) Dissolve 0.12g of ethylene glycol fatty acid ester, 0.16g of polyethylene oxide (20) sorbitan monooleate (Tween 80), and 0.25g of potassium persulfate in 10g of deionized water. spare.

[0035] c) Dissolve 0.75 g (2,3) epoxypropyltrimethylammonium chloride (ETA) in 20 deionized water. spare.

[0036] d) Add 0.6g ethylene glycol fatty acid ester, 0.3g polyethylene oxide (20) sorbitan monooleate (Tween 80), 0.3g potassium persulfate and 40g Dissolve in deionized water to form an aqueous solution and stir for 30 minutes. spare.

[0037] e) Add 0.16g of ethylene glycol fatty acid ester, 0.17g of polyethylene oxide (20) sorbitan monooleate (Tween 80), 0.2g of potassium persulfate and 23.6 In the aqueous solution of g deionized water, react at 70 for 40 minutes, ...

Embodiment 3

[0040] Synthesis of cationic tertiary carbonate styrene-acrylic emulsion:

[0041] a) Mix 20g of n-butyl acrylate, 75g of styrene, 10g of acrylic acid and 5g of VeoVa9 to make a mixed monomer for later use.

[0042] b) Dissolve 0.15 g of ethylene glycol fatty acid ester, 0.1 g of polyethylene oxide (20) sorbitan monooleate (Tween 80), and 0.25 g of potassium persulfate in 10 g of deionized water. spare.

[0043] c) Dissolve 0.55 g (2,3) epoxypropyltrimethylammonium chloride (ETA) in 20 deionized water. spare.

[0044]d) Add 0.6g ethylene glycol fatty acid ester, 0.3g polyethylene oxide (20) sorbitan monooleate (Tween 80), 0.3g potassium persulfate and 40g Dissolve in deionized water to form an aqueous solution and stir for 30 minutes. spare.

[0045] e) Add 0.16g of ethylene glycol fatty acid ester, 0.17g of polyethylene oxide (20) sorbitan monooleate (Tween 80), 0.2g of potassium persulfate and 23.6 In the aqueous solution of g deionized water, react at 70 for 40 minute...

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Abstract

The invention discloses a cationic tert-carbonic acid styrene-acrylic emulsion and a preparation method thereof. The preparation method includes the following steps of a) mixing a (meth) acrylate, a (methyl) styrene and a vinyl ester of tertiary carbonic acid to obtain a mixed monomer; b) mixing an emulsifier, an initiator and water to obtain an aqueous solution A; c) mixing a cationic monomer and water to obtain an aqueous solution B; d) mixing the mixed monomer, the emulsifier, the initiator and water to obtain an aqueous solution C; e) adding the mixed monomer into the emulsifier, the initiator and the aqueous solution to be subjected to a reaction and then dropwise adding the aqueous solution C, the aqueous solution A and the aqueous solution B; and f) performing a thermal insulation and neutralizing until the potential of hydrogen (pH) is identical to 6 to 9 to obtain the cationic tert-carbonic acid styrene-acrylic emulsion. According to the cationic tert-carbonic acid styrene-acrylic emulsion and the preparation method thereof, the addition of aluminium sulfate is not required, the surface strength of paper can be remarkably improved, and the Cobb value of a white Manila board can be remarkably decreased.

Description

technical field [0001] The invention relates to a cationic tertiary carbonate styrene-acrylic emulsion applied to corrugated paper surface sizing. Background technique [0002] Emulsions are widely used for paper surface sizing, and the performance requirements of emulsions are getting higher and higher during the application process. With the improvement and development of emulsion application technology, the emulsion is required to have good process applicability, among which the most important thing is the cohesiveness of styrene-acrylic emulsion. The application of emulsion in paper coating can significantly improve the surface strength of paper and significantly reduce the Cobb value of corrugated board. [0003] At present, with the gradual increase of the proportion of secondary fibers in the raw materials for pulping and papermaking, and the increasing sealing degree of the white water cycle of the paper machine, the papermaking environment in the wet end is becomin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/18C08F220/06C08F218/00C08F2/24C08F8/44D21H21/16D21H19/20
Inventor 施晓旦李威
Owner SHANGHAI DONGSHENG NEW MATERIALS
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