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Preparation and application of emulsion type reinforcing agent for case board paper

An emulsion type and reinforcing agent technology, applied in the direction of reinforcing agent addition, etc., can solve the problem of insufficient ring pressure strength effect.

Active Publication Date: 2013-08-21
JINING MING SHENG NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most polyacrylamides are obtained by solution polymerization, which generally only enhances the tensile strength of paper, but has no obvious effect on the ring pressure strength.

Method used

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  • Preparation and application of emulsion type reinforcing agent for case board paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Preparation of seed emulsion:

[0029] (1) Dissolve 0.2 parts of OP-10 in 10 parts of deionized water, add 30 parts of methyl methacrylate, 15 parts of butyl acrylate, and 5 parts of methacryloyloxyethyl trimethyl chloride under stirring Ammonium chloride is used to emulsify it to obtain a seed monomer pre-emulsion; 0.212 parts of ammonium persulfate is dissolved in 10 parts of deionized water to obtain a seed initiator solution;

[0030] (2) Add 350 parts of deionized water in a four-necked flask equipped with stirring, thermometer, reflux tube and constant pressure dropping funnel, start stirring, add 1.02 parts of cationic guar gum under stirring, heat up to 45°C, After 30 minutes of heat preservation, add 0.52 parts of non-ionic emulsifier OP-10 and stir evenly, raise the temperature of the water bath to 70°C, add all the seed initiator solution under stirring, then slowly add the seed monomer pre-emulsion, the dropping speed is 1.0 hours, drop After the additio...

Embodiment 2

[0036] 1. Preparation of seed emulsion:

[0037] (1) Dissolve 0.6 parts of OP-4 in 15 parts of deionized water, add 40 parts of methyl acrylate, 10 parts of ethyl acrylate, and 5 parts of dimethyl diallyl ammonium chloride under stirring to emulsify , to obtain the seed monomer pre-emulsion; 0.2 parts of sodium persulfate were dissolved in 10 parts of deionized water to obtain a seed initiator solution;

[0038] (2) Add 400 parts of deionized water into a four-necked flask equipped with stirring, a thermometer, a reflux tube and a constant pressure dropping funnel, start stirring, add 1.15 parts of cationic gelatin under stirring, heat up to 45°C, After 40 minutes of heat preservation, add 0.9 parts of non-ionic emulsifier OP-4 and stir evenly, raise the temperature of the water bath to 75°C, add all the seed initiator solution under stirring, then slowly add the seed monomer pre-emulsion, the dropping speed is 1.0 hours, drop After the addition is complete, keep warm for 35 ...

Embodiment 3

[0044] 1. Preparation of seed emulsion:

[0045] (1) Dissolve 0.5 parts of OP-10 in 15 parts of deionized water, add 36 parts of vinyl acrylate, 14 parts of isooctyl acrylate, and 2.5 parts of acryloyloxyethyltrimethylammonium chloride under stirring. It is emulsified to obtain a seed monomer pre-emulsion; 0.24 parts of potassium persulfate are dissolved in 10 parts of deionized water to obtain a seed initiator solution;

[0046] (2) Add 380 parts of deionized water in a four-necked flask equipped with stirring, thermometer, reflux tube and constant pressure dropping funnel, start stirring, add 0.9 part of cationic guar gum under stirring, heat up to 45°C, After 30 minutes of heat preservation, add 0.7 parts of non-ionic emulsifier OP-10 and stir evenly, raise the temperature of the water bath to 72°C, add all the seed initiator solution under stirring, then slowly add the seed monomer pre-emulsion, the dropping speed is 1.0 hours, drop After the addition is complete, keep wa...

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Abstract

The invention discloses a preparation method of an emulsion type reinforcing agent. The method includes: (1) seed emulsion preparation: dissolving a nonionic emulsifier in water, adding a monomer to perform emulsification so as to obtain a seed monomer pre-emulsion; dissolving an initiator in water to obtain a seed initiator solution; mixing a cationic plant gum with water, adding a nonionic emulsifier, raising the temperature to 70-75DEG C, adding a seed initiator aqueous solution, and then slowly adding the seed monomer pre-emulsion, thus obtaining the seed emulsion; and (2) emulsion preparation: dissolving the nonionic emulsifier in water, adding the monomer and a functional monomer, thus obtaining a monomer pre-emulsion; dissolving the initiator in water to obtain an initiator solution; and adding the monomer pre-emulsion and the initiator solution into the seed emulsion obtained in step (1) simultaneously to react, thus obtaining the emulsion type reinforcing agent. The emulsion type reinforcing agent prepared by the invention has the effects of improving the tensile strength and the ring crush strength of paper at the same time.

Description

technical field [0001] The invention relates to a preparation method of an emulsion-type reinforcing agent and its application in cardboard paper. Background technique [0002] As a popular product, packaging cartons have the advantages of light weight, low price, no pollution, and easy recycling. They are widely used in the packaging of general and special products. Since domestic container board paper is generally made of straw pulp and waste paper pulp, it has disadvantages such as poor stiffness, low ring compressive strength, and easy to be affected by moisture. At present, most large carton factories use imported containerboard, which consumes a lot of foreign exchange every year. The impact of a large number of imported containerboards has forced domestic containerboard manufacturers to use all-wood pulp for papermaking in order to ensure product quality, and the cost has increased significantly. The strengthening agent that can improve the strength and water resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/34C08F220/58C08F226/02C08F220/28C08F2/30D21H21/20
Inventor 施晓旦李改霞
Owner JINING MING SHENG NEW MATERIALS CO LTD
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