CN109970903A - A kind of high bonding force and strong water resistance redispersable latex powder and preparation method thereof - Google Patents
A kind of high bonding force and strong water resistance redispersable latex powder and preparation method thereof Download PDFInfo
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- CN109970903A CN109970903A CN201910286791.1A CN201910286791A CN109970903A CN 109970903 A CN109970903 A CN 109970903A CN 201910286791 A CN201910286791 A CN 201910286791A CN 109970903 A CN109970903 A CN 109970903A
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- Prior art keywords
- water resistance
- bonding force
- redispersable latex
- high bonding
- latex powder
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/26—Emulsion polymerisation with the aid of emulsifying agents anionic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/30—Emulsion polymerisation with the aid of emulsifying agents non-ionic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F218/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid
- C08F218/02—Esters of monocarboxylic acids
- C08F218/04—Vinyl esters
- C08F218/08—Vinyl acetate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/40—Redox systems
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a kind of high bonding force and strong water resistance redispersable latex powders; according to mass percent; it is prepared from the following components: vinylacetate 20%-35%, acrylic acid 5%-10%, butyl acrylate 8%-15%, Isooctyl acrylate monomer 2%-5%, protecting colloid 2-4%, initiator 2-4%, emulsifier 3-5%, the preparation method comprises the following steps: being configured to protection sol solution；Lotion, protection sol solution are uniformly mixed, additive is added and forms uniform lotion after strong stirring；The uniform lotion of preparation is transported in drying equipment and is spray-dried, high speed centrifugation is atomized into microlayer model, and part anti-caking agent is added, prevents from bonding, and then by rubber powder granule cooling, separation, that is, product is prepared.Dispersibility, the mobility that the high bonding force of the present invention and strong water resistance redispersable latex powder have had, have the adhesive property for improving mortar and substrate, and the performances such as excellent water resistance are the products for meeting building mortar high-performance, environmental protection.
Description
Technical field
The present invention relates to the field of building materials more particularly to a kind of high bonding force and strong water resistance redispersable latex powder and
Preparation method.
Background technique
The technology of core is external thermal insulation adhesive specially in exterior-wall heat insulation finishing systems, which is to contain polymer
Modified cement mortar, also referred to as dry-mixed mortar.Dry-mixed mortar is mainly done by raw materials such as cement, sand, re-dispersible glue powder, water-retaining agent
It is blended into, wherein most important raw material is re-dispersible glue powder, it is accounted in the cost of material of one-component external thermal insulation dry-mixed mortar
To 80%, at present the product mainly by national of the United States's starch, the offshore companies such as triumphant, the French Rhodia of German prestige produce, price occupies
It is high not under.
Re-dispersible glue powder is the polymer powder for being process special polymer emulsion by spray drying.It is right
The mechanism of modification of dry powder and mortar is identical as lotion, is the film that inierpeneirating network structure is formed between cement slurry and aggregate, thus
Improve adhesive strength, toughness, the deformability etc. of mortar.At present, vinyl acetate it is cruel/preparation of ethylene copolymer (VAE) lotion can
Redisperse latex powder occupies the main dry mortar market in the whole world.But conventional redispersable latex powder is by acetic acid second
Alkene -- ethylene copolymer is basic lotion, is high pressure in production process, requires to equipment, be added in spray-drying process
Protecting colloid (polyvinyl alcohol) be in itself it is hydrophilic, occur water resistance in application process so as to cause redispersable latex powder
The problem of difference, it is difficult to play its excellent properties.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of high bonding force proposed is simultaneous strong resistance to
Aqueous redispersable latex powder and preparation method thereof, to effectively solve that product viscous force in the prior art is insufficient and poor water resistance
Defect.
To achieve the above object, the invention provides the following technical scheme: the invention discloses a kind of high bonding forces and strong resistance to
Aqueous redispersable latex powder is prepared from the following components according to mass percent: vinylacetate 20%-35%, acrylic acid
5%-10%, butyl acrylate 8%-15%, Isooctyl acrylate monomer 2%-5%, protecting colloid 2-4%, initiator 2-4%, emulsifier 3-5%.
Preferably, the emulsifier is anionic emulsifier lauryl sodium sulfate and nonionic emulsifier rouge
Fat alcohol polyoxyethylene ether AEO-9 compounds the compound emulsifying agent to be formed.
Preferably, nonionic emulsifier fatty alcohol polyoxyethylene ether AEO-9: anionic emulsifier dodecyl sulphur
Sour sodium=1.5:1 ~ 3:1.
Preferably, the protecting colloid is compounded using 1788 type of polyvinyl alcohol with 1792 type of polyvinyl alcohol.
Preferably, the degree of polymerization of 1788 type of polyvinyl alcohol is 1700, alcoholysis degree is 87% ~ 89%, and described is poly-
The degree of polymerization of 1792 type of vinyl alcohol is 1650 ~ 1850, and alcoholysis degree is 90% ~ 94%.
Preferably, the proportion of 1788 type of polyvinyl alcohol and 1792 type of polyvinyl alcohol is 1:4 ~ 1:5.
Preferably, the initiator is that persulfate compounds the redox initiator to be formed with sodium hydrogensulfite.
Preferably, the proportion of the sodium hydrogensulfite and persulfate is 1:3 ~ 1:8.
Preferably, the invention also discloses above-mentioned high bonding force and the preparation sides of strong water resistance redispersable latex powder
Method, the specific steps are as follows:
(1), add water to carry out heating stirring protecting colloid, be configured to protection sol solution；
(2), lotion, protection sol solution are uniformly mixed, additive is added and forms uniform lotion after strong stirring；
(3), the uniform lotion of preparation is transported in drying equipment and is spray-dried, high speed centrifugation is atomized into microlayer model, adds
Enter part anti-caking agent, prevent from bonding, then by rubber powder granule cooling, separation, that is, product is prepared.
Preferably, in the step (1), the protecting colloid the preparation method is as follows:
Monomer vinylacetate, butyl acrylate, the acrylic acid of seed (kernel) emulsion design amount are weighed, is uniformly mixed, storage
It is spare；
It is added distilled water and partial emulsifier in four-hole bottle, under stirring action, sequentially adds the monomer acetic acid of outer core design flow
Vinyl acetate, butyl acrylate are uniformly mixed, obtain outer core pre-emulsion, store for future use；
It is added distilled water and partial emulsifier in four-hole bottle, under stirring action, sequentially adds the monomer acetic acid of shell design flow
Vinyl acetate, butyl acrylate, Isooctyl acrylate monomer are uniformly mixed, obtain shell pre-emulsion, store for future use；
Mechanical agitator is being housed, suitable distillation is added in the four-hole bottle of reflux condensing tube and constant pressure funnel in thermometer
Water and polyvinyl alcohol, are warming up to 90 DEG C of heat preservation 2h, and polyvinyl alcohol dissolution is cooled to 65 DEG C, emulsifier and bicarbonate is added
Sodium stirs 5min, and prepared seed emulsion is added, and emulsifies 30min, the initiator of one third is added, is warming up to 72 DEG C
Keep the temperature 1h, outer core pre-emulsion and initiator be then continuously added dropwise, add heat preservation 30min, continue to be added dropwise shell pre-emulsion and
Initiator, keeps the temperature 30min after all dripping, be gradually warming up to 90 DEG C, adds initiator, keeps the temperature 1h, vacuumizes 1h, drops
Temperature simultaneously vacuumizes simultaneously, drops to 40 DEG C to temperature and obtains protecting colloid with bottom discharge.
Preferably, the additive is steady using organosilicon moisture repellent, defoaming agent or lotion in the step (2)
Determine one or more of agent.
Preferably, in the step (3), the anti-caking agent using coarse whiting, talcum powder, fumed silica and
The combination of one of kaolin or a variety of arbitrary proportions.
Compared with the existing technology, technical effect and advantage of the invention:
The present invention uses core-shell emulsion polymerization, and the inside (core) for referring to emulsion particle and outside (shell) are respectively by different high score materials
Combined composite microparticle dispersion.Since there may be grafting, interpenetrating or ionic bonds between the core of core-shell latex particles, shell
Close etc., it is different from general copolymer or polymer blend.Emulsion particle core-shell structure can significantly improve the wear-resisting of polymer
Property, water-fast, weatherability, resistance to soiling, shielding property and adhesive strength, the latex film transparency can also be improved, reduce film forming temperature
Degree.The present invention selects core-shell emulsion polymerization technology, the core-shell structure particle with stone soft shell is synthesized, so as to improve lotion
Energy.
The redispersable latex powder of high bonding force and strong water resistance of the invention compared with prior art, can be fast in water
It is instant solution, be dispersed into homogeneous latex emulsion state, this lotion have the characteristics that former lotion bonding force by force and water-tolerant.And it is viscous
Relay and water resistance are the performance offers by lotion itself, and in the prior art by hydrophobic substance (such as organosilicon, stearic acid is added
Calcium etc.) reach water-fast effect, but this by hydrophobic substance is added be easy to become finished product to reach the method for water-fast effect
Matter keeps the cohesive force of finished product poor.The redispersable latex powder of this high bonding force and strong water resistance can be with cement, semi-hydrated gypsum
It is used in mixed way etc. a variety of inorganic material, the dry-mixed material with property and purposes is made, such as: polymer heat preserving sand
Slurry, polymer gypsum, ceramic tile bond etc..Made dry powder material is with environmentally friendly, cohesive force is strong, water resistance is good, flexibility
The features such as high and ageing-resistant.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Every other embodiment obtained is put, shall fall within the protection scope of the present invention.
Embodiment
In the present embodiment, the raw material of the high bonding force and strong water resistance redispersable latex powder includes: deionized water 100g,
Vinylacetate 50g, acrylic acid 34g, butyl acrylate 12g, Isooctyl acrylate monomer 4g, 1788 type 1g of polyvinyl alcohol, polyethylene
Alcohol 1792 type 1.5g, persulfate 0.4g, sodium hydrogensulfite 1g, lauryl sodium sulfate 2g, AEO-9 4g.
Weigh the monomer vinylacetate 7.5g, butyl acrylate 2g of seed (kernel) emulsion design amount, acrylic acid, mixing
Uniformly, it stores for future use.
Distilled water 20g and lauryl sodium sulfate 0.5g, AEO-9 1g is added in four-hole bottle, is sequentially added under stirring outer
Monomer vinylacetate 22.5g, the butyl acrylate 6g of nuclear design amount are uniformly mixed, obtain outer core pre-emulsion, store for future use.
Distilled water 20g and lauryl sodium sulfate 0.5g, AEO-9 1g is added in four-hole bottle, sequentially adds shell under stirring
Monomer vinylacetate 20g, butyl acrylate 4g, the Isooctyl acrylate monomer 4g of layer design flow, are uniformly mixed, obtain shell pre-emulsification
Liquid stores for future use.
Mechanical agitator is being housed, distilled water is added in the four-hole bottle of reflux condensing tube and constant pressure funnel in thermometer
60g and polyvinyl alcohol 1792 type 1.5g, 1788 type 1g of polyvinyl alcohol, are warming up to 90 DEG C of heat preservation 1h(polyethylene dissolving alcohol), drop
Lauryl sodium sulfate 1g, AEO-9 2g and sodium bicarbonate 0.3g is added to 65 DEG C in temperature, stirs 5min, is added prepared
Seed emulsion emulsifies 30min, the persulfate of 0.1g is added, is warming up to 72 DEG C of heat preservation 1h, and it is pre- that outer core is then continuously added dropwise
Emulsion and initiator add heat preservation 30min, continue that shell pre-emulsion and initiator is added dropwise, keep the temperature after all dripping
30min is gradually warming up to 90 DEG C, adds initiator, keeps the temperature 1h, vacuumizes 1h, cools down and vacuumizes simultaneously, drops to temperature
To 40 DEG C with bottom discharge.
Add water 50g to carry out heating stirring 0588 type 5g of protecting colloid polyvinyl alcohol, is configured to protection sol solution；
(2) lotion 100g, protection sol solution are uniformly mixed, additional Antifoam Agent tributyl phosphate 1g is added, through strength
Uniform lotion is formed after stirring；
(3) the uniform lotion of preparation is transported in drying equipment and is spray-dried, high speed centrifugation is atomized into microlayer model, adds
Enter part anti-caking agent, prevent from bonding, then by rubber powder granule cooling, separation, obtains a kind of high bonding force and strong water resistance can
Redisperse latex powder.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (10)
1. a kind of high bonding force and strong water resistance redispersable latex powder, it is characterised in that: according to mass percent, by with the following group
Point be prepared: vinylacetate 20%-35%, acrylic acid 5%-10%, butyl acrylate 8%-15%, Isooctyl acrylate monomer 2%-5%,
Protecting colloid 2-4%, initiator 2-4%, emulsifier 3-5%.
2. a kind of high bonding force according to claim 1 and strong water resistance redispersable latex powder, it is characterised in that: described
Emulsifier be anionic emulsifier lauryl sodium sulfate and nonionic emulsifier fatty alcohol polyoxyethylene ether AEO-9 multiple
Compound emulsifying agent with formation.
3. a kind of high bonding force according to claim 2 and strong water resistance redispersable latex powder, it is characterised in that: it is non-from
Subtype emulsifier fatty alcohol polyoxyethylene ether AEO-9: anionic emulsifier lauryl sodium sulfate=1.5:1 ~ 3:1.
4. a kind of high bonding force according to claim 1 and strong water resistance redispersable latex powder, it is characterised in that: described
Protecting colloid compounded with 1792 type of polyvinyl alcohol using 1788 type of polyvinyl alcohol, 1788 type of polyvinyl alcohol
The degree of polymerization is 1700, and alcoholysis degree is 87% ~ 89%, and the degree of polymerization of 1792 type of polyvinyl alcohol is 1650 ~ 1850, and alcoholysis degree is
90%~94%。
5. a kind of high bonding force according to claim 4 and strong water resistance redispersable latex powder, it is characterised in that: described
1788 type of polyvinyl alcohol and the proportion of 1792 type of polyvinyl alcohol be 1:4 ~ 1:5.
6. a kind of high bonding force according to claim 1 and strong water resistance redispersable latex powder, it is characterised in that: described
Initiator be persulfate the redox initiator to be formed is compounded with sodium hydrogensulfite.
7. a kind of high bonding force according to claim 6 and strong water resistance redispersable latex powder, it is characterised in that: described
Sodium hydrogensulfite and the proportion of persulfate be 1:3 ~ 1:8.
8. the preparation side of a kind of -7 any high bonding forces and strong water resistance redispersable latex powder according to claim 1
Method, it is characterised in that: specific step is as follows:
(1), add water to carry out heating stirring protecting colloid, be configured to protection sol solution；
(2), lotion, protection sol solution are uniformly mixed, additive is added and forms uniform lotion after strong stirring；
(3), the uniform lotion of preparation is transported in drying equipment and is spray-dried, high speed centrifugation is atomized into microlayer model, adds
Enter part anti-caking agent, prevent from bonding, then by rubber powder granule cooling, separation, that is, product is prepared.
9. the preparation method of a kind of high bonding force according to claim 8 and strong water resistance redispersable latex powder, special
Sign is: in the step (1), the protecting colloid the preparation method is as follows:
Monomer vinylacetate, butyl acrylate, the acrylic acid of seed (kernel) emulsion design amount are weighed, is uniformly mixed, storage
It is spare；
It is added distilled water and partial emulsifier in four-hole bottle, under stirring action, sequentially adds the monomer acetic acid of outer core design flow
Vinyl acetate, butyl acrylate are uniformly mixed, obtain outer core pre-emulsion, store for future use；
It is added distilled water and partial emulsifier in four-hole bottle, under stirring action, sequentially adds the monomer acetic acid of shell design flow
Vinyl acetate, butyl acrylate, Isooctyl acrylate monomer are uniformly mixed, obtain shell pre-emulsion, store for future use；
Mechanical agitator is being housed, suitable distillation is added in the four-hole bottle of reflux condensing tube and constant pressure funnel in thermometer
Water and polyvinyl alcohol, are warming up to 90 DEG C of heat preservation 2h, and polyvinyl alcohol dissolution is cooled to 65 DEG C, emulsifier and bicarbonate is added
Sodium stirs 5min, and prepared seed emulsion is added, and emulsifies 30min, the initiator of one third is added, is warming up to 72 DEG C
Keep the temperature 1h, outer core pre-emulsion and initiator be then continuously added dropwise, add heat preservation 30min, continue to be added dropwise shell pre-emulsion and
Initiator, keeps the temperature 30min after all dripping, be gradually warming up to 90 DEG C, adds initiator, keeps the temperature 1h, vacuumizes 1h, drops
Temperature simultaneously vacuumizes simultaneously, drops to 40 DEG C to temperature and obtains protecting colloid with bottom discharge.
10. the preparation method of a kind of high bonding force according to claim 8 and strong water resistance redispersable latex powder, special
Sign is: in the step (2), the additive is using one in organosilicon moisture repellent, defoaming agent or emulsion stabilizer
Kind is several, and in the step (3), the anti-caking agent is using in coarse whiting, talcum powder, fumed silica and kaolin
One or more arbitrary proportions combination.
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| CN201910286791.1A CN109970903A (en) | 2019-04-10 | 2019-04-10 | A kind of high bonding force and strong water resistance redispersable latex powder and preparation method thereof |
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| CN201910286791.1A CN109970903A (en) | 2019-04-10 | 2019-04-10 | A kind of high bonding force and strong water resistance redispersable latex powder and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110790556A (en) * | 2019-09-19 | 2020-02-14 | 重庆兴渝新材料研究院有限公司 | Hydrophobic light spraying gypsum and preparation method thereof |
| CN111675515A (en) * | 2020-06-09 | 2020-09-18 | 珠海市荣烁绿色建筑节能科技有限公司 | Sound insulation mortar, sound insulation floor structure and preparation method of sound insulation mortar |
| CN111777974A (en) * | 2020-07-24 | 2020-10-16 | 三棵树涂料股份有限公司 | Modified polyvinyl acetate emulsion adhesive and preparation method thereof |
| CN113831443A (en) * | 2021-09-27 | 2021-12-24 | 天津市建筑材料科学研究院有限公司 | Preparation method of water-soluble macromolecular emulsifier |
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| CN101575399A (en) * | 2009-05-31 | 2009-11-11 | 上海三瑞化学有限公司 | Preparation method of re-dispersible latex powder of acrylic acid |
| CN102603960A (en) * | 2012-03-02 | 2012-07-25 | 上海三瑞高分子材料有限公司 | Preparation method of acrylic emulsion with core-shell structure for redispersible emulsion powder |
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| US5928830A (en) * | 1998-02-26 | 1999-07-27 | Xerox Corporation | Latex processes |
| CN101173021A (en) * | 2007-10-26 | 2008-05-07 | 上海大学 | Acrylic acid series nucleocapsid polymer emulsion and re-dispersible emulsion powder, and method for producing thereof |
| CN101550218A (en) * | 2009-04-03 | 2009-10-07 | 江苏工业学院 | Polymer emulsion, preparation method and re-dispersible latex powder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110790556A (en) * | 2019-09-19 | 2020-02-14 | 重庆兴渝新材料研究院有限公司 | Hydrophobic light spraying gypsum and preparation method thereof |
| CN111675515A (en) * | 2020-06-09 | 2020-09-18 | 珠海市荣烁绿色建筑节能科技有限公司 | Sound insulation mortar, sound insulation floor structure and preparation method of sound insulation mortar |
| CN111777974A (en) * | 2020-07-24 | 2020-10-16 | 三棵树涂料股份有限公司 | Modified polyvinyl acetate emulsion adhesive and preparation method thereof |
| CN113831443A (en) * | 2021-09-27 | 2021-12-24 | 天津市建筑材料科学研究院有限公司 | Preparation method of water-soluble macromolecular emulsifier |
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Application publication date: 20190705 |