CN101125946A - Redispersible latex powder - Google Patents
Redispersible latex powder Download PDFInfo
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- CN101125946A CN101125946A CNA2007101394848A CN200710139484A CN101125946A CN 101125946 A CN101125946 A CN 101125946A CN A2007101394848 A CNA2007101394848 A CN A2007101394848A CN 200710139484 A CN200710139484 A CN 200710139484A CN 101125946 A CN101125946 A CN 101125946A
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- latex powder
- redispersible latex
- polyvinyl alcohol
- emulsifying agent
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Abstract
The invention relates to a latex powder, in particular to a redispersible latex powder, solving the problems of poor redispersiblity of the redispersible latex powder in the prior art and comprising the raw materials based on a proportioning ratio by weight: polyvinyl acetate copolymer emulsion 60-80 portions, polyvinyl alcohol 5-20 portions, silica hydrated 2-10 portions and calcium carbonate 5-15 portions. Compared with the same type products in China, the invention greatly promotes the technic indexes of original strength, water-proof, temperature resistance, folding ratio, etc.
Description
Technical field
The present invention relates to a kind of latex powder, be specially a kind of redispersible latex powder.
Background technology
Redispersable latex powder is mainly used in the cement powder mortar of building trade, is the important additives of cement powder mortar.Effect in cement powder mortar is remarkable.Can improve the cohesive strength and the force of cohesion of material.Improve the transverse elasticity and the folding strength of material.Improve the freeze-thaw resistance of material.Improve the weathering resistance of material, weather resistance, wear resistance.Improve the hydrophobic nature of material, reduce water-intake rate.Improve application property, reduce the shrinking percentage of material.Can effectively prevent cracking.Improve bonding strength and force of cohesion, improve counter-bending and anti-extension property, improve shock resistance, improve hydrophobic nature and reduce water-intake rate, improve wear resistance, weather resistance, improve the cracking that freeze-thaw stability effectively prevents material.
Redispersible latex powder is the powder that a kind of special spray-dried back of emulsion (high molecular polymer) forms.It has good redispersibility, and can be reduced into emulsion rapidly after water contacts, and can keep the original character of emulsion.Compare with traditional liquid-containing binder, redispersible latex powder also has convenient transportation, low, the easy storage of packing cost.Arbitrarily be in harmonious proportion advantage such as easy to use easily with other raw materials such as cement, gypsum.The producer that produces redispersible latex powder in the world mainly contains: German Wa Ke company, national of the United States's starch company, French Rhodia, Dalian, Taiwan chemical company, Italian Wei Naou company.And this product is domestic still blank, and the be through with history of the long-term dependence on import of this product of the appearance of Shanxi Sanwei Group Co., Ltd.'s redispersible latex powder has been filled up domestic blank.
| Manufacturer | Product type | Form |
| Germany Wa Ke company | RE5044N | Vinyl acetate-ethylene ester copolymerization rubber powder |
| National of the United States's starch company | 50E100S | Vinyl acetate-ethylene ester copolymerization rubber powder |
| France Rhodia | PAV-29 | Side chain higher fatty acid vinyl acetate rubber powder |
| Dalian, Taiwan chemical company | DM200 | The copolymerization rubber powder of tertiary ethylene carbonate and vinyl acetate between to for plastic |
| Italy Wei Naou company | E06PA | Vinyl acetate-ethylene ester copolymerization rubber powder |
Application number is 200410025257.9 to disclose a kind of redispersible latex powder, it is the latex powder of being made by following weight percentages: emulsion polymerization 65-75%, polyvinyl alcohol 5-15%, silicon-dioxide 3-10%, lime carbonate 5-12%, on the technique effect of putting down in writing from this application, its technique effect has only shown the most general effect of redispersibility latex powder with fuzzy language.And only be ethene and vinyl acetate copolymer emulsion to emulsion polymerization, two kinds of probabilistic materials of ethene and tertiary ethylene carbonate, for not specific description and the explanation more of these two kinds of raw materials, those skilled in the art are difficult to repetition.
Summary of the invention
The present invention provides a kind of redispersible latex powder for the problem that solves the redispersible latex powder redispersibility difference that exists in the prior art.
The present invention is realized by following technical scheme, and a kind of redispersible latex powder comprises the raw material of following weight ratio example,
60～80 parts of polyvinyl acetate copolymerization emulsions; 5～20 parts of polyvinyl alcohol; 2～10 parts of white carbon blacks; 5～15 parts in lime carbonate.
Also comprise vinyl-acetic ester-ethylene copolymerization emulsions 80-160 part or organic silicon emulsion 5-10 part.
Above-mentioned substance is mixed the back spraying drying to get final product.Spraying drying is a routine techniques well known to those skilled in the art.
The preparation of polyvinyl acetate copolymerization emulsion is specially,
By weight preparing burden: 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 or 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 scope, mixing speed is transferred to 70r/min, in polymeric kettle, evenly drip the mixture of tartrate, hydrogen peroxide and vinyl acetate between to for plastic and tertiary ethylene carbonate, the control rate of addition, making polymerization reaction time is 4-6 hour, continues slaking then 1 hour.
The adding redispersible latex powder can significantly improve the bonding strength of mortar, the redispersible latex powder that adds is many more, bonding strength is just high more, when caking agent must stand extraneous test, characteristics such as the bonding force that just more can embody redispersible latex powder is strong, water-tolerant, snappiness height and weather resistance.Main data from following table obtain proof.
| Test event | Performance index | The |
|||||
| 0％ | 1％ | 2％ | 3％ | 4％ | 5％ | ||
| Former intensity, Mpa (cement) | 〉=0.7 (terrestrial reference) | 0.4 | 1.0 | 1.28 | 1.32 | 1.6 | 1.42 |
| Water-fast intensity MPa | ≥0.5 | 0.72 | 0.98 | 0.85 | 1.18 | 1.25 | 1.4 |
| Heatproof intensity MPa | ≥0.5 | 0.4 | 0.8 | 1.2 | 1.25 | 1.34 | 1.1 |
| The backfin ratio | ≤3.0 | 3.6 | 2.9 | 2.7 | 2.1 | 2.0 | 1.9 |
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
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
Fig. 1 represents that the ultimate compression strength of rubber powder 1 and external different trade mark rubber powder mortars is with variation tendency in the length of time
14 days heatproof cohesive strengths of the Fig. 2 and external different rubber powder trades mark comparing result
14 days water-fast cohesive strength comparing results of the Fig. 3 and the external different rubber powder trades mark
Embodiment
80 parts of polyvinyl acetate copolymerization emulsions; 5 parts of polyvinyl alcohol; 10 parts of white carbon blacks; 5 parts in lime carbonate.
White, runny polymer powder that spray-dried back forms.Be mainly used in non-cement based dry-mixed mortars such as bonding gypsum, brushing gypsum.
Polyvinyl acetate copolymerization emulsion by part by weight is: water 43%, polyvinyl alcohol 3.8%, emulsifying agent 0.65%, sodium-acetate 0.05%, tartrate 0.08%, hydrogen peroxide 0.35%, vinyl acetate 35%, tertiary ethylene carbonate 17.07% is made, and emulsifying agent is Sodium dodecylbenzene sulfonate or 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 scope, mixing speed is transferred to 70r/min, in polymeric kettle, evenly drip the mix monomer of tartrate, hydrogen peroxide and vinyl acetate between to for plastic and tertiary ethylene carbonate, the control rate of addition, making polymerization reaction time is 4-6 hour, continues slaking then 1 hour.
Embodiment 2, and a kind of redispersible latex powder comprises the raw material of following weight ratio example, 60 parts of polyvinyl acetate copolymerization emulsions; 20 parts of polyvinyl alcohol; 2 parts of white carbon blacks; 15 parts in lime carbonate.Polyvinyl acetate copolymerization emulsion by part by weight is: water 53%, polyvinyl alcohol 3.2%, emulsifying agent 0.4%, sodium-acetate 0.03%, tartrate 0.06%, hydrogen peroxide 0.25%, vinyl acetate 25%, tertiary ethylene carbonate 18.06% is made, and emulsifying agent is a Sodium dodecylbenzene sulfonate, alkyl polyglycol ether.
The preparation method is with embodiment 1.
70 parts of polyvinyl acetate copolymerization emulsions; 10 parts of polyvinyl alcohol; 6 parts of white carbon blacks; 10 parts in lime carbonate.
Polyvinyl acetate copolymerization emulsion by part by weight is: 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% is made, and emulsifying agent is a Sodium dodecylbenzene sulfonate, alkyl polyglycol ether.
The preparation method is with embodiment 1.
Embodiment 4, and a kind of redispersible latex powder comprises the raw material of following weight ratio example,
80 parts of polyvinyl acetate copolymerization emulsions; 20 parts of polyvinyl alcohol; 10 parts of white carbon blacks; 15 parts in lime carbonate; 160 parts of vinyl-acetic ester-ethylene copolymerization emulsions.
Polyvinyl acetate copolymerization emulsion by part by weight is: 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% is made, and emulsifying agent is 12-sodium alkyl benzene sulfonate, alkyl polyglycol ether.
Be mainly used in dry-mixed mortars such as external wall outer insulation bonding mortar, ceramic tile caking agent, dried powder boundary agent, gravity flowing levelling mortar and floor material.
Embodiment 5, and a kind of redispersible latex powder comprises the raw material of following weight ratio example,
60 parts of polyvinyl acetate copolymerization emulsions; 5 parts of polyvinyl alcohol; 2 parts of white carbon blacks; 5 parts in lime carbonate; 80 parts of vinyl-acetic ester-ethylene copolymerization emulsions.The polyvinyl acetate copolymerization emulsion preparation is with implementing 1 or 2 or 3 or 4.
Embodiment 6, and a kind of redispersible latex powder comprises the raw material of following weight ratio example,
70 parts of polyvinyl acetate copolymerization emulsions; 15 parts of polyvinyl alcohol; 8 parts of white carbon blacks; 9 parts in lime carbonate; 120 parts of vinyl-acetic ester-ethylene copolymerization emulsions.The polyvinyl acetate copolymerization emulsion preparation is with implementing 1 or 2 or 3 or 4.
60 parts of polyvinyl acetate copolymerization emulsions; 5 parts of polyvinyl alcohol; 2 parts of white carbon blacks; 5 parts in lime carbonate; 5 parts of organic silicon emulsions.The polyvinyl acetate copolymerization emulsion preparation is with implementing 1 or 2 or 3 or 4.
80 parts of polyvinyl acetate copolymerization emulsions; 20 parts of polyvinyl alcohol; 10 parts of white carbon blacks; 15 parts in lime carbonate; 10 parts of organic silicon emulsions.The polyvinyl acetate copolymerization emulsion preparation is with implementing 1 or 2 or 3 or 4.
Embodiment 9, and a kind of redispersible latex powder comprises the raw material of following weight ratio example,
70 parts of polyvinyl acetate copolymerization emulsions; 15 parts of polyvinyl alcohol; 5 parts of white carbon blacks; 8 parts in lime carbonate; 7 parts of organic silicon emulsions.The polyvinyl acetate copolymerization emulsion preparation is with implementing 1 or 2 or 3 or 4.
Claims (4)
1. redispersible latex powder is characterized in that: comprise the raw material of following weight ratio example,
60～80 parts of polyvinyl acetate copolymerization emulsions; 5～20 parts of polyvinyl alcohol; 2～10 parts of white carbon blacks; 5～15 parts in lime carbonate.
2. redispersible latex powder according to claim 1 is characterized in that: also comprise vinyl-acetic ester-ethylene copolymerization emulsions 80-160 part.
3. redispersible latex powder according to claim 1 is characterized in that: also comprise organic silicon emulsion 5-10 part.
4. according to claim 1 or 2 or 3 described redispersible latex powders, it is characterized in that:
The raw material of polyvinyl acetate copolymerization emulsion and preparation method are, by weight preparing burden: 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 are 12-sodium alkyl benzene sulfonate or 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 scope, mixing speed is transferred to 70r/min, in polymeric kettle, evenly drip the mixture of tartrate, hydrogen peroxide and vinyl acetate between to for plastic and tertiary ethylene carbonate, the control rate of addition, making polymerization reaction time is 4-6 hour, continues slaking then 1 hour.
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| CNB2007101394848A CN100545208C (en) | 2007-09-19 | 2007-09-19 | Redispersible latex powder |
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| CNB2007101394848A CN100545208C (en) | 2007-09-19 | 2007-09-19 | Redispersible latex powder |
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| CN102382407A (en) * | 2011-08-19 | 2012-03-21 | 安徽皖维高新材料股份有限公司 | Redispersible emulsion powder and preparation method thereof |
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| DE102011084048A1 (en) | 2011-10-05 | 2013-04-11 | Wacker Chemie Ag | Building material dry formulations containing polymer powder |
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| 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 |
| CN103524971A (en) * | 2013-10-11 | 2014-01-22 | 山西金盾苑建材有限公司 | Dispersible latex powder and preparation method thereof |
| CN107286548A (en) * | 2017-06-28 | 2017-10-24 | 保定市华联化工有限责任公司 | A kind of net taste redispersable latex powder and preparation method thereof |
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| CN107473621B (en) * | 2017-09-19 | 2020-02-18 | 安徽皖维高新材料股份有限公司 | Preparation method of redispersible rubber powder with excellent comprehensive performance |
| CN110183187A (en) * | 2019-06-20 | 2019-08-30 | 诸暨市兆山天峰干混砂浆有限公司 | A kind of modified water-proofing anticracking cement mortar |
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Effective date of registration: 20180223 Address after: 041603 Zhao town east street, Hongdong County, Linfen City, Shanxi province (3 D group) Patentee after: Shanxi 3D Chemical Co., Ltd. Address before: 041603 Shanxi Hongdong County, Shanxi Province, Zhao town Shanxi three dimensional group Limited by Share Ltd Patentee before: Shanxi Sanwei Group Co., Ltd. |
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Effective date of registration: 20190628 Address after: 041603 Hou Village, Zhaocheng Town, Hongdong County, Linfen City, Shanxi Province Patentee after: Shanxi Three-dimensional Huabang Group Co., Ltd. Address before: 041603 Shanxi Linfen Hongdong County Zhao town East Street (three dimensional group hospital) Patentee before: Shanxi 3D Chemical Co., Ltd. |