CN100506861C - Polyvinyl acetate copolymerization emulsion - Google Patents
Polyvinyl acetate copolymerization emulsion Download PDFInfo
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- CN100506861C CN100506861C CNB2007101394852A CN200710139485A CN100506861C CN 100506861 C CN100506861 C CN 100506861C CN B2007101394852 A CNB2007101394852 A CN B2007101394852A CN 200710139485 A CN200710139485 A CN 200710139485A CN 100506861 C CN100506861 C CN 100506861C
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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
The present invention relates to a kind of polyvinyl acetate (PVA), be specially a kind of polyvinyl acetate copolymerization emulsion.
Background technology
Redispersible latex powder is a kind of by the powder adhesive of making after special emulsion (high molecular polymer) spraying drying.This powder with can form emulsion by very fast redispersion after water contacts, and have the character identical with initial latex, promptly can form film after the water evaporates, this film has high-flexibility, high weather resisteant and to the high-adhesion of various base materials.Redispersible latex powder is " environmental protection, building energy conservation, high-quality multi-usage " powder building materials--the requisite important functional additive of-dry-mixed mortar, it can improve the performance of mortar, improve the intensity of mortar, improve the bonding strength of mortar and various base materials, but improve flexibility and deformability, ultimate compression strength, folding strength, wearability, toughness, bonding force and the water retention capacity application property of mortar.In addition, the latex powder with hydrophobic nature can make mortar have good water-repellancy.Redispersible latex powder is mainly used in: in the various dry-mixed mortars such as inner and external wall putty powder, ceramic tile bond, tile pointing agent, dried powder boundary agent, external wall outer insulation mortar, gravity flowing levelling mortar, mending mortar, decoration mortar, waterproof mortar.Polyvinyl acetate copolymerization emulsion is one of important source material of producing redispersible latex powder, carry out spray drying experiment by polyvinyl acetate copolymerization emulsion to the traditional method preparation, the outward appearance of the powder that gushes out has nothing unusual, but when being made into 50% the aqueous solution, find that powder is water insoluble.So the rubber powder that the aqueous polyvinyl acetate emulsion that the traditional method preparation is described gushes out does not have redispersible.
Summary of the invention
The present invention does not have the problem of redispersible and a kind of polyvinyl acetate copolymerization emulsion is provided for the redispersible latex powder that solves the common polyvinyl acetate (PVA) that exists in the prior art and produce.
The present invention is realized by following technical scheme, and a kind of polyvinyl acetate copolymerization emulsion is to be made by the raw material reaction according to the following weight ratio example,
Water 43-53%, polyvinyl alcohol, 3.2-3.8%, emulsifying agent: 0.4-0.65%,
Sodium-acetate 0.03-0.05%, tartrate 0.06-0.08%, hydrogen peroxide 0.25-0.35%,
Vinyl acetate 25-35%, tertiary ethylene carbonate 15-25%,
Emulsifying agent is 12-sodium alkyl benzene sulfonate, alkyl polyglycol ether.
At first be to add entry, polyvinyl alcohol is under agitation added the dissolution kettle dissolving, be mixed with the aqueous solution, add emulsifying agent in dissolution kettle; And then the good polyvinyl alcohol water solution of dissolving sent into polymeric kettle, when temperature reaches 73-77 ℃ of scopes, in polymeric kettle, evenly drip the mixture of tartrate, hydrogen peroxide and vinyl acetate and tertiary ethylene carbonate, the control rate of addition, making polymerization reaction time is 4-6 hour, continues slaking 1～3 hour.
With 60～80 parts of the polyvinyl acetate copolymerization emulsions that prepare; 5～20 parts of polyvinyl alcohol; 2～10 parts of white carbon blacks; 5～15 parts in lime carbonate.The latex powder that obtains after the mixed atomizing drying has the following advantages,
Usually polyvinyl acetate copolymerization emulsion particulate typical particle diameter is about 0.2-5 μ m; The typical particle diameter of redispersible latex powder is about 80 μ m; After redispersible latex powder disperseed in water again, the emulsion particle typical particle diameter was 1-5 μ m.Has the character identical thus with initial latex.
Main data from following table obtain proof.
1. former intensity
The former intensity of mortar is meant the intensity of mortar after normal curing, and he is a leading indicator of weighing mortar bonding strength size.As can be seen from the above table, its bonding strength of the mortar of admixture redispersible latex powder does not have only 0.4MPa.And the bonding strength that adds five kinds of different volume rubber powders has all improved greatly, all meets and be far longer than the standard-required 0.74MPa of former bonding strength, and along with the volume of redispersible latex powder increases also raising gradually of bonding strength.
2. water-fast intensity
Water-fast intensity is meant that mortar puts into the bonding strength that the water maintenance is surveyed again after the maintenance under standard conditions.What it characterized is that mortar is in the bonding strength performance index in the alternation of wetting and drying state.Its performance quality is to weigh the water-proof important indicator of mortar.
3. heatproof intensity
Heatproof intensity is meant that mortar puts into hot environment again and carry out the bonding strength that maintenance is measured after the standard conditions maintenance, and it is to characterize the bonding strength index whether mortar has high-temperature stability.Its performance quality is one of important indicator weighing the mortar weather resistance.
4. backfin ratio
Backfin is than the ratio that is ultimate compression strength and folding strength, and it is to characterize the flexible the key technical indexes of mortar, and backfin shows that than more little the snappiness of mortar is high more.
Compare with external like product
1. the contrast of product performance index sees the following form
Table 1 rubber powder 1 of the present invention and the contrast of rubber powder abroad
2. the contrast of application performance index (test is carried out according to the building material industry standard JC-T547-94 of the People's Republic of China (PRC)):
1) rubber powder 1 of the present invention and external different trade mark rubber powders are under 2% volume, and the contrast of mortar ultimate compression strength sees Table 1, Fig. 1.
Ultimate compression strength (Pma) data of table 1 rubber powder 1 of the present invention and external different trade mark rubber powder mortars
From table 1, Fig. 1 as can be seen, along with the increase in the length of time, the ultimate compression strength of different rubber powders is in rising trend.Under equal conditions, rubber powder 1 ultimate compression strength is in level on the upper side.
2). the heatproof cohesive strength contrast in 14 days of rubber powder 1 and the different volumes of external different trade mark rubber powders sees Table 2, Fig. 2.
The heatproof cohesive strength contrast in 14 days of the different volumes of the different trade mark rubber powders of table 2
From table 2, Fig. 2 as can be seen, when be 14 days the length of time, along with the increase of rubber powder amount, the variation of the heatproof cohesive strength of different rubber powders differed, and external 2, external 5 is slightly on a declining curve.External 1, external 3, external 4, external 6, rubber powder 1 is in rising trend.Explanation is along with the increase of rubber powder amount, and temperature tolerance external 1, external 3, external 4, external 6, rubber powder 1 is good.
3). the water-fast cohesive strength contrast in 14 days of rubber powder 1 of the present invention and the different volumes of external different trade mark rubber powders sees Table 3, Fig. 3.
The water-fast cohesive strength contrast in 14 days of the different volumes of the different trade mark rubber powders of table 3
From table 3, Fig. 3 as can be seen, when be 14 days the length of time, along with the increase of rubber powder amount, except that external 5, the water-fast cohesive strength of the rubber powder of other model was in rising trend.Explanation is along with the increase of rubber powder amount, and the water-fast cohesive strength of rubber powder is in rising trend substantially.
Description of drawings
The ultimate compression strength of Fig. 1 rubber powder 1 and external different trade mark rubber powder mortars is with variation tendency in the length of time
The Fig. 2 and external different rubber powder trades mark heatproof cohesive strength contrast in 14 days
The Fig. 3 and the external different rubber powder trades mark water-fast cohesive strength contrast in 14 days
Embodiment
At first be to add entry, polyvinyl alcohol is under agitation added the dissolution kettle dissolving, be mixed with the aqueous solution, add emulsifying agent in dissolution kettle; And then the good polyvinyl alcohol water solution of dissolving sent into polymeric kettle, when temperature reaches 73-77 ℃ of scopes, mixing speed is transferred to 70r/min, in polymeric kettle, evenly drip the mixture of tartrate, hydrogen peroxide and vinyl acetate and tertiary ethylene carbonate, the control rate of addition, making polymerization reaction time is 4-6 hour, continues slaking 1 hour.
At first be to add entry, polyvinyl alcohol is under agitation added the dissolution kettle dissolving, be mixed with the aqueous solution, add emulsifying agent in dissolution kettle; And then the good polyvinyl alcohol water solution of dissolving sent into polymeric kettle, when temperature reaches 73-77 ℃ of scopes, mixing speed is transferred to 70r/min, in polymeric kettle, evenly drip the mixture of tartrate, hydrogen peroxide and vinyl acetate and tertiary ethylene carbonate, the control rate of addition, making polymerization reaction time is 4-6 hour, continues slaking 1 hour.
At first be to add entry, polyvinyl alcohol is under agitation added the dissolution kettle dissolving, be mixed with the aqueous solution, add emulsifying agent in dissolution kettle; And then the good polyvinyl alcohol water solution of dissolving sent into polymeric kettle, when temperature reaches 73-77 ℃ of scopes, mixing speed is transferred to 70r/min, in polymeric kettle, evenly drip the mixture of tartrate, hydrogen peroxide and vinyl acetate and tertiary ethylene carbonate, the control rate of addition, making polymerization reaction time is 4-6 hour, continues slaking 1 hour.
Embodiment 4, and a kind of polyvinyl acetate copolymerization emulsion is to be made by the raw material reaction according to the following weight ratio example, water 45.34%, polyvinyl alcohol 3.8%, emulsifying agent 0.4%, sodium-acetate 0.05%, tartrate 0.06%, hydrogen peroxide 0.35%, vinyl acetate 25%, tertiary ethylene carbonate 25%, emulsifying agent is 12-sodium alkyl benzene sulfonate, alkyl polyglycol ether.
At first be to add entry, polyvinyl alcohol is under agitation added the dissolution kettle dissolving, be mixed with the aqueous solution, add emulsifying agent in dissolution kettle; And then the good polyvinyl alcohol water solution of dissolving sent into polymeric kettle, when temperature reaches 73-77 ℃ of scopes, mixing speed is transferred to 70r/min, in polymeric kettle, evenly drip the mixture of tartrate, hydrogen peroxide and vinyl acetate and tertiary ethylene carbonate, the control rate of addition, making polymerization reaction time is 4-6 hour, continues slaking 1 hour.
Claims (2)
1, a kind of polyvinyl acetate copolymerization emulsion is characterized in that being made by the raw material reaction according to the following weight ratio example,
Water 43-53%, polyvinyl alcohol 3.2-3.8%, emulsifying agent 0.4-0.65%,
Sodium-acetate 0.03-0.05%, tartrate 0.06-0.08%, hydrogen peroxide 0.25-0.35%,
Vinyl acetate 25-35%, tertiary ethylene carbonate 15-25%,
Emulsifying agent is 12-sodium alkyl benzene sulfonate, alkyl polyglycol ether,
At first be to add entry, polyvinyl alcohol is under agitation added the dissolution kettle dissolving, be mixed with the aqueous solution, add emulsifying agent in dissolution kettle; And then the good polyvinyl alcohol water solution of dissolving sent into polymeric kettle, when temperature reaches 73-77 ℃ of scopes, in polymeric kettle, evenly drip the mixture of tartrate, hydrogen peroxide and vinyl acetate and tertiary ethylene carbonate, the control rate of addition, making polymerization reaction time is 4-6 hour, continues slaking 1～3 hour.
2, polyvinyl acetate copolymerization emulsion according to claim 1 is characterized in that being made by the raw material reaction according to the following weight ratio example,
Water 50.59%, polyvinyl alcohol 3.5%, emulsifying agent 0.5%,
Sodium-acetate 0.04%, tartrate 0.07%, hydrogen peroxide 0.3%,
Vinyl acetate 30%, tertiary ethylene carbonate 15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101394852A CN100506861C (en) | 2007-09-19 | 2007-09-19 | Polyvinyl acetate copolymerization emulsion |
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| CNB2007101394852A CN100506861C (en) | 2007-09-19 | 2007-09-19 | Polyvinyl acetate copolymerization emulsion |
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| CN100506861C true CN100506861C (en) | 2009-07-01 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20130203927A1 (en) * | 2010-06-25 | 2013-08-08 | Celanese Emulsions Gmbh | Plasticized Vinyl Acetate Copolymer Binder Compositions for Chopped Strand Mat |
| CN102515665B (en) * | 2011-12-07 | 2013-03-20 | 广州市恒盛建设工程有限公司 | Ceramic facing brick special-purposed pointing agent |
| CN102558420B (en) * | 2011-12-28 | 2014-05-28 | 厦门大学 | Vinyl acetate copolymer modified by silsesquioxane (tris sulfonic acid isobutyl polyhedral oligomeric silsesquioxane (POSS)) and preparation method thereof |
| CN103524971B (en) * | 2013-10-11 | 2015-09-16 | 山西金盾苑建材有限公司 | Dispersibility latex powder and preparation method thereof |
| CN105153851A (en) * | 2015-08-27 | 2015-12-16 | 天长市银狐漆业有限公司 | Heat and flame resistant waterproof modified acrylate emulsion coating |
| CN106281531A (en) * | 2016-08-31 | 2017-01-04 | 刘亚勋 | A kind of fine coal binding agent |
| CN106833177B (en) * | 2017-03-30 | 2019-05-07 | 北京市创新玮地科贸有限公司 | A kind of environment protection type wall covering interfacial agents and preparation method |
| CN115109542A (en) * | 2022-07-29 | 2022-09-27 | 南宝树脂（佛山）有限公司 | Aldehyde-free dual-reaction self-crosslinking white latex and preparation method thereof |
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