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Automobile industry filter paper impregnation emulsion and method for modifying the same by using polymerizable emulsifier

A polymeric emulsifier, a technology in the automotive industry, applied in the direction of paper, papermaking, textiles and papermaking, etc., can solve the problems of complex process, increase of emulsion production cost, and decline of water and solvent resistance of resin film, so as to reduce environmental pollution and application Good effect and reduced production cost

Active Publication Date: 2008-07-30
MUDANJIANG HENGFENG PAPER CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

These monomer-modified styrene-acrylic emulsions have significantly improved the properties of emulsion stability, film-forming strength, and film-forming flexibility, and have a great effect on improving the water and solvent resistance, burst resistance, and tensile strength of filter paper. To a certain extent, it cannot meet the requirements of high-grade automobile filter paper. When using it, it is often necessary to add an external linking agent (such as melamine formaldehyde resin) to improve its application effect, which also leads to an increase in the production cost of the filter paper and a complicated process.
The reason is that the main monomer styrene is a hard monomer, which provides film-forming hardness, strength, wear resistance, water resistance and other properties after emulsion polymerization. After application, the stiffness and burst resistance of filter paper are correspondingly improved. Acrylates are soft monomers that improve the flexibility, weather resistance, and durability of emulsion film formation after emulsion polymerization. Functional monomers and cross-linking monomers mainly improve and improve the above properties, but conventional emulsion polymerization generally uses 1% to 4 % of emulsifiers, these emulsifiers are adsorbed on the surface of latex particles by physical action after emulsion polymerization. When the resin is cured to form a film, it is free in the resin film or volatilizes, resulting in a decrease in the water and solvent resistance of the resin film and pollution of waste water and the environment. , also increases the cost of emulsion production

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0007] Specific Embodiment 1: In this embodiment, a certain proportion of hard monomers, soft monomers, cross-linking monomers and functional monomers are used as copolymers to synthesize water-soluble impregnated resin for automobile air filter paper through pre-emulsification semi-continuous emulsion polymerization, emulsified During the polymerization process, all or part of the polymerizable emulsifier is used for modification to play the role of dispersion, emulsification and copolymerization, which accounts for 60% to 100% of the emulsifier. The main formula and modification method are as follows:

[0008] 1. Formula:

[0009] 1. The type of hard monomer in the copolymer is mainly styrene, which accounts for 40% to 55% of the mass percentage of the monomer;

[0010] 2. The soft monomer in the copolymer is mainly acrylates, including a mixture of butyl acrylate, ethyl acrylate, hydroxy acrylate, etc., which account for 40% to 55% of the monomer mass;

[0011] 3. The cro...

specific Embodiment approach 2

[0021] Embodiment 2: Emulsion formula (mass ratio): hard monomer styrene: 55, soft monomer butyl acrylate: 35, crosslinking monomer N-methylol acrylamide: 3, functional monomer methacrylic acid : 5, polymerizable emulsifier AMPS (sodium 2-acrylamide-2-methyl-propylsulfonate); 1.6, OP-10 emulsifier: 0.4; initiator ammonium persulfate: 0.8, deionized water: 120 (20 parts are used to dissolve the emulsifier, 10 parts are used to dissolve the crosslinking monomer, and 10 parts are used to dissolve the initiator), and an appropriate amount of saturated sodium bicarbonate solution.

[0022]Weigh 2.0 parts of emulsifier, dissolve them in 16 parts and 4 parts of deionized water respectively, take 13.3 parts of emulsifier solution and add it to 40 parts of deionized water to disperse evenly, then slowly add hard monomer, soft monomer and functional monomer , fully stirred and emulsified for 30min, weighed 3 parts of cross-linking monomer and dissolved it in 10 parts of deionized water,...

specific Embodiment approach 3

[0023] Embodiment 3: Emulsion formula (mass ratio): hard monomer styrene: 55, soft monomer butyl acrylate: 32, crosslinking monomer methylenebisacrylamide: 4, functional monomer methacrylic acid: 8. Polymerizable emulsifier COPS-1 (sodium allyloxy hydroxypropyl sulfonate): 1.2, OP-10 emulsifier: 1.0; initiator ammonium persulfate: 1.0, deionized water: 120 (20 parts in Dissolving emulsifier, 10 parts for dissolving cross-linking monomer, 10 parts for dissolving initiator), appropriate amount of saturated sodium bicarbonate solution.

[0024] Dissolve 1.2 parts of polymerized emulsifier and 1 part of OP-10 emulsifier in 10 parts of deionized water, respectively, add 65% emulsifier solution to 40 parts of deionized water and disperse evenly, then slowly add hard monomer and soft monomer. body and functional monomer, fully stirred and emulsified for 30 minutes, weighed 4 parts of cross-linking monomer and dissolved it in 10 parts of deionized water, added it to the emulsion, and ...

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Abstract

The invention disclose a filter paper impregnating emulsion in the automotive industry and a method for modifying the filter paper impregnating emulsion by using a polymeric emulsifier, and relates to a filter paper water-soluble impregnated resin in the automotive industry and the method for modifying the filter paper impregnating emulsion in the automotive industry by using the polymeric emulsifier. The emulsion of the invention comprises the polymeric emulsifier of 0.5 percent to 4 percent, a general emulsifier of 0 to 3 percent, hard-monomer styrene of 40 percent to 55 percent, soft-monomer acrylic ester of 40 percent to 55 percent, crosslinking monomer of 2 percent to 5 percent, and functional monomer of 2 percent to 10 percent according to the mixture ratio of the mass percent. The invention has the modification method that: the hard-monomer, the soft-monomer, the crosslinking monomer and the functional monomer are used as a copolymer, and the automobile air filter paper water-soluble impregnated resin is synthetized through a semicontinuous pre-emulsification emulsion polymerization method. The invention greatly enhances the hydrolytic resistance, solvent resistance and strength character of the filter paper after the impregnating in the water-soluble resin, lowers the emulsion manufacturing cost, and reduces the environment pollution caused by dissociative emulsifier after the general emulsion is applied. The invention has the advantages of high monomer percent conversion, stable emulsion, etc.

Description

technical field [0001] The invention relates to a method for modifying the filter paper of the automobile industry with a water-soluble impregnating resin and a polymerizable emulsifier to impregnate the emulsion. Background technique [0002] The impregnated resins for filter paper in the automobile industry are divided into alcohol-soluble resins and water-soluble resins. Alcohol-soluble resins have disadvantages such as high filter paper brittleness, dark color, high cost, and complicated use process. At the same time, there are a large amount of organic solvents that cause environmental pollution and potential safety hazards. In recent years, the filter paper impregnation resin in the automobile industry has gradually developed and transitioned to water-soluble resins. Water-soluble resins have the advantages of simple production process, low cost, little environmental pollution during production and use, low degree of harm, and no potential safety hazards. However, ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/04D21H17/14D21H17/07D21H21/24D21H17/66
Inventor 刘文波潘泉利鲍漫秋邬伟英何兆秋
Owner MUDANJIANG HENGFENG PAPER CO LTD
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