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High-temperature-resistant yellowing-resistant high-hardness vinyl acetate-acrylic emulsion and preparation method thereof

An acetone-acrylic emulsion and anti-yellowing technology, applied in the direction of monocarboxylate copolymer adhesive, adhesive type, etc., can solve the problem of reducing the forming hardness of sprayed cotton non-woven fabrics, increasing the residual amount of emulsion monomers, Low reaction conversion rate, etc., to avoid high temperature decomposition, reduce oxidation yellowing, and increase dry film hardness

Inactive Publication Date: 2017-06-13
上海巴德富实业有限公司
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The presence of acetic acid will lower the conversion rate of the reaction, resulting in an increase in the residual amount of the emulsion monomer, and the monomer itself will be oxidized rapidly under high temperature conditions due to its double bond, resulting in yellowing of the fiber
In addition, acetic acid itself remains in the emulsion, and it will also be oxidized at high temperature, causing the fiber to turn yellow.
[0005] Second, the carbonyl group on the polymer chain of the vinegar-acrylic emulsion is not protected by other groups, and it is easily oxidized under high temperature conditions, causing the fiber to yellow
In addition, due to the high polarity of the carbonyl group, it is easy to absorb water vapor in the air and soften the product, thereby greatly reducing the forming hardness of the spray-bonded cotton non-woven fabric.

Method used

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  • High-temperature-resistant yellowing-resistant high-hardness vinyl acetate-acrylic emulsion and preparation method thereof

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preparation example Construction

[0032] The preparation method of the high-temperature-resistant, yellowing-resistant high-hardness acetate-acrylic emulsion of the present invention comprises the following steps:

[0033] a) Weigh the raw materials according to the above ratio for later use;

[0034] b) Add 30-40 parts of water, emulsifier, butyl acrylate, vinyl acetate, functional monomer and N-methylol acrylamide into the emulsification tank under normal temperature and pressure, and fully stir until uniform;

[0035] c) Add the remaining amount of water into the reactor, raise the temperature of the reactor to 65-70°C, add 5-15% of the mixture obtained in step b, and react for 30-40 minutes;

[0036] d) Add the remaining mixture obtained in step b and persulfate to the mixture obtained in step c, keep the reaction temperature at 75-80°C and keep stirring, and the reaction time is 3-5 hours;

[0037] e) After the dropwise addition in step d, the temperature is raised to 80-85°C and kept for 1-2 hours;

[...

Embodiment 1

[0045] The high-temperature-resistant, yellowing-resistant high-hardness acrylic emulsion of the present invention comprises water, butyl acrylate, vinyl acetate, hydroxyethyl acrylate, N-methylol acrylamide, fatty alcohol polyoxyethylene ether, and sodium persulfate. The above components are calculated in parts by mass: 100 parts of water, 2 parts of butyl acrylate, 100 parts of vinyl acetate, 1 part of hydroxyethyl acrylate, 5 parts of N-methylol acrylamide, 1 part of fatty alcohol polyoxyethylene ether part, 0.1 part of sodium persulfate. Among them, N-methylolacrylamide is 40% effective active ingredient liquid.

[0046] The preparation method of the high-temperature-resistant, yellowing-resistant high-hardness acetate-acrylic emulsion of the present invention comprises the following steps:

[0047] a) Weigh the raw materials according to the above ratio for later use;

[0048] b) Add 30 parts of water, emulsifier, butyl acrylate, vinyl acetate, functional monomer and N-...

Embodiment 2

[0058] The high-temperature-resistant, yellowing-resistant high-hardness acetate-acrylic emulsion of the present invention comprises water, butyl acrylate, vinyl acetate, hydroxyethyl acrylate, hydroxypropyl acrylate, acrylic acid, itaconic acid, N-methylol acrylamide, Fatty Alcohol Ethoxylates, Disodium Phosphate Half Ethoxylate, Sodium Persulfate, Ammonium Persulfate, Potassium Persulfate. The above components are calculated in parts by mass: 100 parts of water, 8 parts of butyl acrylate, 150 parts of vinyl acetate, 1 part of hydroxyethyl acrylate, 1 part of hydroxypropyl acrylate, 2 parts of acrylic acid, 1 part of itaconic acid, 10 parts of N-methylol acrylamide, 2 parts of fatty alcohol polyoxyethylene ether, 3 parts of disodium ethoxylate phosphate half ester, 0.3 part of sodium persulfate, 0.3 part of ammonium persulfate, and 0.4 part of potassium persulfate. Among them, N-methylolacrylamide is 50% effective active ingredient liquid.

[0059] The preparation method of ...

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Abstract

The invention discloses a high-temperature-resistant yellowing-resistant high-hardness vinyl acetate-acrylic emulsion which comprises the following components in parts by mass: 100 parts of water, 2-8 parts of butyl acrylate, 100-150 parts of vinyl acetate, 1-5 parts of functional monomer, 5-10 parts of N-hydroxymethyl acrylamide, 1-5 parts of emulsifier and 0.1-1 part of persulfate. The high-temperature-resistant yellowing-resistant high-hardness vinyl acetate-acrylic emulsion has the advantages of favorable yellowing resistance, favorable high-temperature resistance and higher hardness.

Description

technical field [0001] The invention relates to an acrylate emulsion and a preparation method thereof, in particular to a high-hardness acrylic acid emulsion with high temperature resistance and yellowing resistance and a preparation method thereof. Background technique [0002] Spray-bonded cotton is a non-woven fabric that is widely used at present. Its principle is to spray the adhesive on both sides of the fluffy fiber layer, because there is a certain pressure when spraying, and combined with the suction force when the lower part of the fiber layer is vacuum-absorbed. , so the adhesive can also penetrate into the inside of the fiber layer, and the fiber layer after spraying the adhesive is then dried and cured, so that the intersection points between the fibers are bonded, and the fibers that are not bonded to each other still remain Considerable degrees of freedom. Because of its fluffy, high compression resilience, resistance to dry and wet washing, and light weigh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F218/08C08F220/18C08F220/58C08F220/28C08F220/06C08F222/02C08F4/40C08F2/26C08F2/30C09J131/04
CPCC08F2/26C08F2/30C08F4/40C08F218/08C09J131/04C08F220/1804C08F220/58C08F220/281C08F222/02C08F220/06
Inventor 赵敏子徐国平杨宇李习刚
Owner 上海巴德富实业有限公司
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