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Polyvinyl acetate copolymerization emulsion

A technology of polyvinyl acetate and vinyl acetate, applied in the field of polyvinyl acetate, which can solve the problem of non-redispersibility of redispersible latex powder

Active Publication Date: 2009-07-01
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
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1, a kind of polyvinyl acetate copolymer emulsion is made by reacting the raw materials according to the following weight ratio, water 43%, polyvinyl alcohol 3.8%, emulsifier 0.65%, sodium acetate 0.05%, tartaric acid 0.08%, hydrogen peroxide 0.35%, vinyl acetate 35%, vinyl tertiary carbonate 17.07%, emulsifier is sodium dodecylbenzene sulfonate or alkyl polyethylene glycol ether.

[0044] First, add water to the dissolution tank, add polyvinyl alcohol into the dissolution tank to dissolve under stirring, 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, and make the polymerization reaction time 4-6 hours, continue C...

Embodiment 2

[0045] Embodiment 2, a kind of polyvinyl acetate copolymer emulsion is made by reacting the raw materials according to the following weight ratio, water 53%, polyvinyl alcohol 3.2%, emulsifier 0.4%, sodium acetate 0.03%, tartaric acid 0.06%, hydrogen peroxide 0.25%, vinyl acetate 25%, vinyl tertiary carbonate 18.06%, emulsifier is sodium dodecylbenzene sulfonate or alkyl polyethylene glycol ether.

[0046] First, add water to the dissolution tank, add polyvinyl alcohol into the dissolution tank to dissolve under stirring, 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, and make the polymerization reaction time 4-6 hours, continue Co...

Embodiment 3

[0047] Embodiment 3, a kind of polyvinyl acetate copolymer emulsion is made by reacting the raw materials according to the following weight ratio, water 50.59%, polyvinyl alcohol 3.5%, emulsifier 0.5%, sodium acetate 0.04%, tartaric acid 0.07%, hydrogen peroxide 0.3%, 30% vinyl acetate, 15% vinyl tert-carbonate, emulsifier sodium dodecylbenzenesulfonate, alkyl polyglycol ether.

[0048] First, add water to the dissolution tank, add polyvinyl alcohol into the dissolution tank to dissolve under stirring, 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, and make the polymerization reaction time 4-6 hours, continue Cook for 1 hour.

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Abstract

The invention relates to a polyvinyl acetate, in particular to a polyvinyl acetate copolymer emulsion. The problem that the redispersible latex powder produced by common polyvinyl acetate has no redispersibility in the prior art is solved. Composed of water, polyvinyl alcohol, emulsifier, sodium acetate, tartaric acid, hydrogen peroxide, vinyl acetate, vinyl tertiary carbonate. Compared with similar products at home and abroad, the technical indicators of the present invention, such as original strength, water resistance strength, temperature resistance strength and folding ratio, are greatly improved.

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 Patents(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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