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Polyvinyl acetate copolymerization emulsion

A technology of polyvinyl acetate and copolymer emulsion, applied in the field of polyvinyl acetate, can solve the problem that redispersible latex powder has no redispersibility and the like

Active Publication Date: 2008-02-13
山西三维华邦集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a polyvinyl acetate copolymer emulsion in order to solve the problem that the redispersible latex powder produced by common polyvinyl acetate in the prior art has no redispersibility

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0044] Embodiment 1, a kind of polyvinyl acetate copolymer emulsion, is that following raw material is made up according to weight ratio, water 43%, polyvinyl alcohol 3.8%, emulsifier 0.65%, sodium acetate 0.05%, tartaric acid 0.08%, hydrogen peroxide 0.35%, acetic acid Vinyl ester 35%, vinyl tertiary carbonate 17.07%, emulsifier sodium dodecylbenzene sulfonate or alkyl polyethylene glycol ether.

[0045] First, add water to the dissolution tank, add polyvinyl alcohol to the dissolution tank under stirring to dissolve, prepare an aqueous solution, and add an emulsifier; then send the dissolved polyvinyl alcohol aqueous solution into the polymerization tank, when the temperature reaches 73-77°C Adjust the stirring speed to 70r / min, and evenly add tartaric acid, hydrogen peroxide, and a mixture of vinyl acetate and vinyl tert-carbonic acid ester dropwise into the polymerization kettle, control the dropping speed, make the polymerization reaction time 4-6 hours, and continue to ma...

Embodiment 2

[0046] Embodiment 2, a kind of polyvinyl acetate copolymer emulsion, is that following raw material is made up according to weight ratio, water 53%, polyvinyl alcohol 3.2%, emulsifier 0.4%, sodium acetate 0.03%, tartaric acid 0.06%, hydrogen peroxide 0.25%, acetic acid Vinyl ester 25%, vinyl tertiary carbonate 18.06%, emulsifier is sodium dodecylbenzene sulfonate or alkyl polyethylene glycol ether.

[0047] First, add water to the dissolution tank, add polyvinyl alcohol to the dissolution tank under stirring to dissolve, prepare an aqueous solution, and add an emulsifier; then send the dissolved polyvinyl alcohol aqueous solution into the polymerization tank, when the temperature reaches 73-77°C In the range, adjust the stirring speed to 70r / min, add tartaric acid, hydrogen peroxide, and a mixture of vinyl acetate and vinyl tertiary carbonate evenly dropwise into the polymerization kettle, control the drop rate, make the polymerization reaction time 4-6 hours, and continue to m...

Embodiment 3

[0048] Embodiment 3, a kind of polyvinyl acetate copolymer emulsion, is that following raw material is made up according to weight ratio, water 50.59%, polyvinyl alcohol 3.5%, emulsifier 0.5%, sodium acetate 0.04%, tartaric acid 0.07%, hydrogen peroxide 0.3%, acetic acid Vinyl ester 30%, vinyl tertiary carbonate 15%, emulsifier sodium dodecylbenzene sulfonate, alkyl polyglycol ether.

[0049] First, add water to the dissolution tank, add polyvinyl alcohol to the dissolution tank under stirring to dissolve, prepare an aqueous solution, and add an emulsifier; then send the dissolved polyvinyl alcohol aqueous solution into the polymerization tank, when the temperature reaches 73-77°C In the range, adjust the stirring speed to 70r / min, add tartaric acid, hydrogen peroxide, and a mixture of vinyl acetate and vinyl tertiary carbonate evenly dropwise into the polymerization kettle, control the drop rate, make the polymerization reaction time 4-6 hours, and continue to mature 1 hour. ...

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Abstract

The utility model relates to acetate polyvinyl, in particular to a polyvinyl acetate copolymer emulsion which solves the problem of the emulsion powder generated by ordinary polyvinyl under the existing technology in terms of dispersion property. The utility model consists of water, polyvinyl alcohol, emulsifier, sodium acetate, tartaric acid, hydrogen peroxide, vinyl acetate, and butyl carbonate ethylene. Compared with similar products at home and abroad, the utility model is of great improvement in terms of technology indexes, such as original strength, water-resistance strength, temperature-resistance strength and pressure-snapping ratio and so on.

Description

technical field [0001] The invention relates to a polyvinyl acetate, in particular to a polyvinyl acetate copolymer emulsion. Background technique [0002] Redispersible latex powder is a powder adhesive made from a special emulsion (high molecular polymer) after spray drying. This powder can quickly redisperse to form an emulsion after contacting with water, and has the same properties as the initial emulsion, that is, a film can be formed after the water evaporates. This film has high flexibility, high weather resistance and resistance to various High adhesion to substrates. Redispersible latex powder is an essential and important functional additive for "green environmental protection, building energy saving, high-quality multi-purpose" powder building materials---dry-mixed mortar. It can improve the performance of mortar and increase the strength of mortar. Improve the bonding strength between mortar and various substrates, improve the flexibility and deformability, co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F218/08C08F2/26
Inventor 王海涛
Owner 山西三维华邦集团有限公司
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