Novel copolymerized white latex

A white latex, a new type of technology, applied in the field of adhesives, can solve the problems of human health hazards, poor freeze-thaw stability, and low heat resistance, and achieve fast crystallization and drying speed, poor freeze-thaw stability, and excellent water resistance. Effect

Inactive Publication Date: 2008-02-27
林玉珠
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  • Description
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AI Technical Summary

Problems solved by technology

But its shortcomings are: 1. The product contains a large amount of toxic free formaldehyde, which is harmful to human health; 2. The product has low solid content, poor freeze-thaw stability, low heat resistance, and creep resistance. Poor performance, slow drying, poor water resistance

Method used

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Experimental program
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Embodiment Construction

[0022] A new type of copolymerized white latex, its ingredients are: polyvinyl alcohol: 5kg; deionized water: 40kg; sodium bicarbonate: 0.4kg; vinyl acetate: 40kg; butyl acrylate: 5.5kg; kg; 5040 dispersant 0.2kg; silicone defoamer: 2.8kg; ammonium persulfate 0.4kg; plasticizer DBP 3.7kg; AMP-95 additive amount, its synthesis process is:

[0023] A. Put polyvinyl alcohol and deionized water into a glass-lined reactor, and heat up to 95°C to dissolve polyvinyl alcohol;

[0024] B. When the temperature is lowered to 68-72°C, add sodium bicarbonate, 5040 dispersant, silicone defoamer, and stir for 0.5h;

[0025] C. Add vinyl acetate, butyl acrylate, vinyl tert-carbonate (VeoVa) and ammonium persulfate, and carry out polymerization reaction for 8-10 hours under normal pressure, temperature 72-80°C and stirring state;

[0026] D, adding an appropriate amount of AMP-95 additive (AMP-95 is 2-amino-2 methyl-1-propanol, as a pH value regulator), so that the pH value is 6.5;

[0027] ...

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PUM

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Abstract

The invention discloses a new typed white copolymerization emulsion in the binding technical domain, which comprises the following steps: dispensing raw materials with polyvinyl alcohol, deionized water, sodium bicarbonate, vinyl acetate, butyl acrylate, tertiary carbonate vinyl ester, dispersant, defoamer, ammonium persulphate, plasticizer and pH value adjuster; doing the polymerizing reaction in the glass lining autoclave; putting the polyvinyl alcohol and deionized water in the autoclave; heating to dissolve the materials; cooling to adding the dispersant and defoamer; adding the reacting monomer to polymerize under normal pressure at 72-80 deg. c in the stirring condition; adding fitful quantity of pH adjuster to control the pH value between 6. 0 and 7. 0; adding plasticizer DBP; forming the product with good binding property and transparent organic film, safety and environment protection to save resource.

Description

Technical field: [0001] The invention relates to the technical field of adhesives, in particular to a novel copolymerized white latex. Background technique: [0002] Most of the existing white latex is made from polyvinyl alcohol, vinyl acetate, formaldehyde, hydrochloric acid, etc., through polymerization, and has the characteristics of mature technology and low cost. But its shortcomings are: 1. The product contains a large amount of toxic free formaldehyde, which is harmful to human health; 2. The product has low solid content, poor freeze-thaw stability, low heat resistance, and creep resistance. Poor performance, slow drying, poor water resistance. [0003] With the continuous improvement of people's quality of life and the advancement of science and technology, people's needs and choices for adhesive products are becoming more and more demanding. Those products with good performance, high quality, environmental protection, safety and energy saving will be favored by p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F218/08C08F2/22C09J131/04
Inventor 林玉珠
Owner 林玉珠
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