CN103073944B - Nano film-forming accelerant and application thereof - Google Patents
Nano film-forming accelerant and application thereof Download PDFInfo
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- CN103073944B CN103073944B CN201310038666.1A CN201310038666A CN103073944B CN 103073944 B CN103073944 B CN 103073944B CN 201310038666 A CN201310038666 A CN 201310038666A CN 103073944 B CN103073944 B CN 103073944B
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Abstract
The invention relates to a nano film-forming accelerant for a dry powder coating for interior and exterior walls of a building, and an application of the nano film-forming accelerant, and belongs to the technical field of building coatings. The nano film-forming accelerant comprises the following components in parts by weight: 5-15 parts of methyl propyl trimethoxy silane, 5-12 parts of sodium oxalate and 60-80 parts of nano silica, wherein the particle size of nano silica is 20-200 nm. With the adoption of the nano film-forming accelerant, redispersed emulsion powder particles can be bonded with other components very well and permeate through the surface of a substrate of a building material better. In a coating drying process, volumes of expanded particles are reduced, and then mesh spaces are reduced, so that the contact among molecules is increased greatly, and van der waals interaction forces among the molecules are utilized fully. The dried coating forms a solid film, and is bonded with a wall surface firmly, and a design effect is achieved.
Description
Technical field
The present invention relates to a kind of building inside and outside wall dry powder paint nanometer film forming accelerating, belong to building coating technical field.The crosslinking technological of this nanometer film forming accelerating adds the dimensional network structure composition of film, thus significantly improves film compactness, enhances paint adhesion.
Background technology
Current coating for internal and external wall product is all latex form.Coating under latex form, in order to shipping storage and obtain good construction effect, adds dispersant, antifreezing agent, coalescents and cosolvent etc. in coating.These chemicals are volatile organic compound (VOC), have tremendous influence to health.VOC is the acronym (organic compound of boiling point below 250 DEG C is called VOC) of VOC english nouns volatile organic compounds.The content of the domestic mandatory standard about limits of harmful substances in interior wall coating (GB 18582-2008) VOC is decided to be≤120g/L; The environmental labelling product technical requirement (HJ/T201-2005) of water paint, the content of VOC is≤80g/L.Still the have an appointment VOC of 10-15 ten thousand tons of national inner-outer wall emulsion paint in 2010 evaporates in air, VOC contaminated environment, again health risk.When the VOC in room reaches finite concentration, in short time, people can feel headache, Nausea and vomiting, weak etc., there will be tic, stupor time serious, and the liver of people, kidney, brain and nervous system can be hurt, cause the serious consequences such as failure of memory.
Latex paint will reach the discharge of real Diamond Search, just needs to develop dry powder paint.The use of inner-outer wall dry powder paint adds water at the construction field (site) to stir rear brushing.All select the dry powder component not containing VOC can ensure the environmental-protecting performance of inner-outer wall dry powder paint.In order to make inner-outer wall dry powder paint have excellent adhesive force, water-fast and weather resistance, and nanometer film forming accelerating is wherein key component.Nanometer film forming accelerating contacts with each other after the various component of coating can be made to add water to be good for and closes, film coalescence in dry run, strengthens and metope adhesion simultaneously.
Nanometer film forming accelerating is a key component in dry powder paint.Other component comprises film forming matter, pigment, filler and the auxiliary agent of dry powder.Film forming matter is the component of hydrophobic, and most of filler is hydrophilic component.In dry run after brushing, the components in close of inorganic-organic can combine and form the close solid netted paint film knitted by nanometer film forming accelerating.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point, a kind of building inside and outside wall dry powder paint nanometer film forming accelerating and application thereof are provided.
According to technical scheme provided by the invention, a kind of nanometer film forming accelerating, formula rate is as follows by weight: methacryloxypropyl trimethoxy silane 5 ~ 15 parts, sodium oxalate 5 ~ 12 parts and nano silicon 60 ~ 80 parts;
Above-mentioned substance is mixed by formula rate and obtains product nanometer film forming accelerating.
As a further improvement on the present invention, described nano silicon particle diameter is 20 ~ 200nm.
As a further improvement on the present invention, the application of described nanometer film forming accelerating, described nanometer film forming accelerating makes an addition in dry powder paint, and addition counts 1% ~ 5% by dry powder paint quality.
Described dry powder paint is the dry powder paint being applied to building inside and outside wall, purchased from market.
The special nanometer film forming accelerating of described dry powder paint has carried out specialized designs to paint film crosslinking technological to film forming procedure mechanism, adopts secondary surface spreading absorption mechanism to the design of redispersible latex powder.First, ensure redispersible latex powder evenly and also average grain diameter quality must control at 5 ~ 50 μm, bulk density is 0.45g/cm
3, fine and smooth particle greatly increases surface area, obtains good surface spreading suction-operated by large surface area.In addition, after the particle that described nanometer film forming accelerating can make redispersible latex powder and aqueous solution, particle volume can expand, and causes secondary surface spreading to adsorb, further strengthens intermolecular interaction and combination.Therefore, the particle of redispersible latex powder can well combine with other components, better infiltrates through the surface of the matrix of building materials.
Paint film crosslinking technological have employed structure micro adjusting to nanometer film forming accelerating.Nanometer film forming accelerating basic structure Ry-(SiO) x (OH) nx (OR) m (m<n).Owing to containing hydrophilic and hydrophobic grouping in dry powder paint component simultaneously, organically combine to make various component, the hydrophilic radical that nanometer film forming accelerating itself has hydroxyl to form simultaneously and the hydrophobic grouping that alkyl is formed, can be bonded together various component so well.The suitable various component ratio of certain control is also very important.In addition, make full use of intermolecular Van der Waals interaction force, strengthen the bonding of various particle, form the close solid netted paint film knitted.Above-mentioned mention under water action condition, particle volume expand cause secondary surface spreading, form many netted gaps and space, these gaps and space are filled by trickle nano particle very soon simultaneously.In the process of coating drying, the particle reduced volume of expansion, mesh space also reduces thereupon, therefore considerably increases intermolecular contact, and intermolecular Van der Waals interaction force is fully utilized.Dried coating forms firm paint film, and and metope strong bonded, reach design effect.Its technical indicator of nanometer film forming accelerating is as shown in table 1.
Table 1 nanometer film forming accelerating technical indicator
| Performance | Index |
| Outward appearance | Pale yellow powder, can flow freely |
| Solid content (quality %) | ≥99.80 |
| Ash content (quality %) | ～0.2% |
| Bulk density (g/cm 3） | 0.45 |
| Average grain diameter | 20～200nm |
| PH value | 7.5 |
Dry powder latex adds water at the construction field (site) and is dispersed into liquid latex coating, and wherein constituent part produces hydrolytic process.After brushing, dry run is the film forming procedure being mutually coalesced as overall film of various component in coating.Nanometer film forming accelerating is a component in dry powder paint, accounts for greatly the 1%-5% of dry powder paint gross weight.The content of nanometer film forming accelerating plays a key effect compared with the film of strong hardness to acquisition.Dry powder latex add aqueous dispersion, hydrolytic process and film forming procedure carry out under room temperature (15 ~ 30 DEG C) condition.
To being formed, to obtain compared with the key of the film of strong hardness be exactly by changing the physico character of silica surface to nanometer film forming accelerating, inorganic component in coating and organic component are being bonded together, improve compatibility between particle and polymer molecule, reciprocation between reinforcer and polymer, improve process industrial art performance, improve the reinforcing property of filler.The present invention has used Nano-meter SiO_2
2surface has the characteristic of the hydroxyl of undersaturated residual bond and different bond styles, owing to having hydroxyl at silica surface, surface hydroxyl be that hydrophilic existence makes surface have chemisorbed activity.Be based on its surface hydroxyl easily and hydroxy-containing compounds react, the feature of easy adsorpting anion to silica modified principle, therefore, hydrophobic group etc. can be added to its modification.The interpenetrating networks of inorganic-organic are formed in film forming procedure.In addition, because nano silicon specific area is large, there is a large amount of undersaturated residual bonds and the hydroxyl of different bond styles, thus obtain the film compared with strong hardness.
Tool of the present invention has the following advantages: the latex powder particle using nanometer film forming accelerating provided by the invention can make to disperse again can well combine with other components, better infiltrates through the surface of the matrix of building materials.And in the process of coating drying, the particle reduced volume of expansion, mesh space also reduces, and therefore considerably increases intermolecular contact, makes intermolecular Van der Waals interaction force be fully utilized thereupon.Dried coating forms firm paint film, and and metope strong bonded, reach design effect.
Accompanying drawing explanation
Nano silicon degree relation in the change of Fig. 1 hardness of film and nanometer film forming accelerating.
The Raman spectrum of the nanometer film forming accelerating of the different percentage composition (5%, 4%, 3%, 2% and 1%) of Fig. 2.
Fig. 3 dry powder paint, dry powder paint adds water and mixes and the dry rear Raman spectrogram being cross-linked film forming of brushing.
Detailed description of the invention
Embodiment 1
A kind of nanometer film forming accelerating, formula rate is as follows by weight: methacryloxypropyl trimethoxy silane 5 parts, sodium oxalate 5 parts and nano silicon 80 parts;
Above-mentioned substance is mixed by formula rate and obtains product nanometer film forming accelerating;
Described nano silicon particle diameter is 20nm.
Embodiment 2
A kind of nanometer film forming accelerating, formula rate is as follows by weight: methacryloxypropyl trimethoxy silane 15 parts, sodium oxalate 12 parts and nano silicon 60 parts;
Above-mentioned substance is mixed by formula rate and obtains product nanometer film forming accelerating;
Described nano silicon particle diameter is 200nm.
Embodiment 3
A kind of nanometer film forming accelerating, formula rate is as follows by weight: methacryloxypropyl trimethoxy silane 10 parts, sodium oxalate 8 parts and nano silicon 70 parts;
Above-mentioned substance is mixed by formula rate and obtains product nanometer film forming accelerating;
Described nano silicon particle diameter is 100nm.
Application Example 1
Nanometer film forming accelerating component is by weight:
Methacryloxypropyl trimethoxy silane, sodium oxalate and nano silicon.Three kinds of component ratios change directly can affect the hardness of film.
Wherein methacryloxypropyl trimethoxy silane component is 15 parts, sodium oxalate component 12 parts, gets 9 groups, add respectively nano silicon 10 parts, 20 parts, 30 parts, 40 parts, 50 parts, 60 parts, 70 parts, 80 parts and 90 parts.Be added into dry powder paint respectively, promoter addition counts 1% ~ 5% by dry powder paint quality, and film, film rear film hardness/H is as shown in Figure 1.
As shown in Figure 1, the addition of nano silicon is best with 60 ~ 80 parts.
Application Example 2
The effect prepared with embodiment 1 preferably nanometer film forming accelerating is added in dry powder paint, addition is respectively 1%, 2%, 3%, 4% and 5%, add the dry powder paint Raman spectrogram after nanometer film forming accelerating as shown in Figure 2, stronger spectral signatures is better and be cross-linked into membrane structure, the film performance of doing well.
Wherein the film forming crosslinking features area distribution of nanometer film forming accelerating is at 100cm
-1to 800cm
-1.Along with the increase of nanometer film forming accelerating content, Raman spectrum increases gradually in characteristic peaks intensity, and film forming cross-linked effect is improved.
Dry powder emulsion paint, because adding nanometer film forming accelerating, accelerates film forming speed greatly, is reduced to the sensitiveness to temperature and humidity during construction in membrane process, coating adaptability is greatly strengthened.Through laboratory test, workshop expanding test and test of going into operation, stable processing technique, easy and simple to handle, good process repeatability; Paint inspection joined by expanding test sample, and performance reaches pre-provisioning request, and collimation is strong.Test specimen send national building materials test center to detect, VOC, formaldehyde, heavy metal etc. do not detect, artificial ageing reaches 1300h(top grade product artificial ageing resistance 600h), interior wall coating abrasion resistance reaches 50000 times (standard regulation >=5000 times), and whole performance is up to state standards the quality level of excellent kind of regulation.
After brushing, along with moisture volatilizees gradually, originally the paint filler particle of the polymer beads of dispersity and polymer wrapped was kept to draw close gradually with electrostatic repulsion and space stability ultimate load effect, in wet film, solid divides raising, progressively reach and closely pile up, the adsorption layer of polymer beads and paint filler particle surface is progressively destroyed (comprising protecting glue), and particle is further closely piled up; If temperature is higher than MFT (MFT), under the effect of capillary force or surface tension etc., emulsion polymer particle is out of shape, film coalescence, the counterdiffusion of polymer interface strand phase, infiltration, winding simultaneously, film performance is improved further, forms the continuous print film with certain performance.
The film of dry powder emulsion paint is under the effect of nanometer film forming accelerating, because nanoparticle surface has many active groups, can produce with the group in latex particle and interact, not only promote that polymer and paint filler particle are closely piled up mutually further, and can cross-linking reaction be produced to each other, increase the dimensional network structure composition of film, film compactness is strengthened, and this is the reasons in structure that inner-outer wall dry powder latex paint has high-class product performance.
Can be obtained structure and the composition of measured matter by Raman spectrum test, the structure that we utilize Raman spectrum to test before and after the brushing of He Shida dry powder paint changes.Based on He Shida dry powder paint basic components, the present embodiment tests dry powder paint itself, and dry powder paint adds water mixing, three kinds of states of crosslinked film forming after brushing is dry.Although these three kinds of states all contain identical component, structure of matter generation basic change after film forming.This change is reflected in Raman spectrum.
Fig. 3 shows dry powder paint respectively, and dry powder paint adds water mixing, the Raman spectrum of crosslinked film forming after brushing is dry.These three spectral lines are obviously different.Produce two strong peaks (black circle represents) after dry powder paint drying and forming-film, mark coating dry run is cross-linked the structure of film forming.The film forming crosslinking features area distribution of Raman spectrum display nanometer film forming accelerating is at 100cm
-1to 800cm
-1.Coating drying forms best film forming cross-linked effect afterwards.
Claims (1)
1. an application for nanometer film forming accelerating, is characterized in that: formula rate is as follows by weight: methacryloxypropyl trimethoxy silane 5 ~ 15 parts, sodium oxalate 5 ~ 12 parts and nano silicon 60 ~ 80 parts;
Above-mentioned substance is mixed at normal temperatures by formula rate and obtains product nanometer film forming accelerating;
Described nanometer film forming accelerating makes an addition in dry powder paint, and addition counts 1% ~ 5% by dry powder paint quality.
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| CN103073944B true CN103073944B (en) | 2015-04-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109021727A (en) * | 2018-07-05 | 2018-12-18 | 河北美荷涂料有限公司 | A kind of dry-type ceramic tile paint special |
| CN109929303A (en) * | 2019-03-06 | 2019-06-25 | 河北美荷涂料有限公司 | A kind of asymmetric crystal conformation film forming accelerating, coating and film-forming process |
| CN111171726A (en) * | 2020-01-16 | 2020-05-19 | 深圳半亭健康科技有限公司 | Interior wall coating taking water as solvent and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481584A (en) * | 2009-01-23 | 2009-07-15 | 华南理工大学 | Dry powder latex paint for inner wall and preparation thereof |
| CN101522565A (en) * | 2006-10-13 | 2009-09-02 | 赢创德固赛有限责任公司 | Surface-modified silicas |
| JP2009298882A (en) * | 2008-06-11 | 2009-12-24 | Dow Corning Toray Co Ltd | Coating agent composition |
| JP2012514669A (en) * | 2009-05-18 | 2012-06-28 | パンガン グループ スチール バナジウム アンドチタニウム カンパニー リミテッド | Coating composition and passivated galvanized material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1754766B1 (en) * | 2004-05-07 | 2011-08-17 | Asahi Kasei Chemicals Corporation | Aqueous resin dispersion for adhesive and composition thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101522565A (en) * | 2006-10-13 | 2009-09-02 | 赢创德固赛有限责任公司 | Surface-modified silicas |
| JP2009298882A (en) * | 2008-06-11 | 2009-12-24 | Dow Corning Toray Co Ltd | Coating agent composition |
| CN101481584A (en) * | 2009-01-23 | 2009-07-15 | 华南理工大学 | Dry powder latex paint for inner wall and preparation thereof |
| JP2012514669A (en) * | 2009-05-18 | 2012-06-28 | パンガン グループ スチール バナジウム アンドチタニウム カンパニー リミテッド | Coating composition and passivated galvanized material |
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