The specially for heat insulating polystyrene outer-wall board compound binding agent
Technical field
The present invention relates to the binding agent class, particularly relate to a kind of specially for heat insulating polystyrene outer-wall board compound binding agent.
Background technology
At present, the binding agent that generally uses all adopts the high molecular polymer dispersion all over the world, and this dispersion mainly contains following three kinds: 1) natural rubber breast system; 2) synthetic rubber breast system; 3) thermoplastic resin breast system; The dispersion that wherein can be used to prepare the heat insulating polystyrene outer-wall board system has Vinyl Acetate Copolymer multipolymer, vinylbenzene one acrylic acid series, acrylic acid series etc., above-mentioned substance has certain weathering resistance and ageing-resistant performance, but, because binding agent is originally as pure organic substance, organism in use for some time, especially under illumination condition, be prone to chemical reactions such as cracking, degraded, it is aging that binding agent is taken place, thereby shorten the work-ing life of binding agent, and adopting pure organic substance synthetic adhesive, cost is too high.
From " chemistry of cement ", we know: ordinary Portland cement condense and process of setting in, can only with the water of its weight about 1/4, become chemically persistent bonding state, thisly only account for 3/4 of original free volume of water in conjunction with constitution water, and other 1/4 water and silicate cement form loose bonding state, i.e. gel water; Above-mentioned two kinds of bonding states form solid absorption material---the cement gel of homogeneous, when in dry air or at 105 ℃, cement gel loses gel water, and stay finely divided many holes (gel pore), these holes are equivalent to 20% of its volume, and the existence of above-mentioned huge hole promptly is to cause the root of mixing clay structure anti-permeability difference.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art, provide a kind of cohesiveness strong, ageing-resistant performance is good, hardness height, and the strong heat insulating polystyrene outer-wall board compound binding agent of water resistance.
Technical scheme of the present invention is:
A kind of specially for heat insulating polystyrene outer-wall board compound binding agent is characterized in that this binding agent is made up of following materials by weight:
30% silicon sol 20-40 part;
Vinylbenzene-acrylate polymer emulsion 20-100 part;
Sequestrant 0.4-0.8 part;
Solvent 0.8-1.6 part;
Filler 84-110 part;
Mould inhibitor 0.15-0.30 part;
Thickening material 0.2-0.4 part;
Described sequestrant is a chromium nitrate; Described solvent is an ethylene glycol; Described filler is quartz sand, asbestos and lime carbonate; Described mould inhibitor is own imidazoles polymkeric substance, can select the mould inhibitor that ROHM AND HAAS, Henkel section are peaceful or Hua Ke company in Xi'an produces for use; Described thickening material is Natvosol or Walocel MT 20.000PV, the HBR250 mould inhibitor that the present invention selects for use U.S. affiliated company to produce;
The optimum weight proportioning of above-mentioned substance is:
20 parts of 30% silicon sol;
80 parts of vinylbenzene-acrylate polymer emulsions;
0.7 part of chromium nitrate;
0.7 part of ethylene glycol;
100 parts of quartz sands;
2 parts in asbestos;
3 parts in lime carbonate;
The imidazoles polymkeric substance is 0.2 part;
0.02 part of Natvosol;
Described vinylbenzene-acrylate polymer emulsion (SBC) is to be formed by the polymerizable raw material that contains the following weight proportion substance:
Emulsifying agent 5.4-13.7 part;
Acrylate 340-420 part;
Vinylbenzene 120-164 part;
Acrylamide 8.8-14.4 part;
Organosilane 3-15 part;
Persulphate 2.3-3.5 part;
Water 400-500 part;
Described vinylbenzene-acrylate polymer emulsion is that the material by following optimum weight proportioning is polymerized: 6.66 parts of emulsifying agents;
388.9 parts of acrylate;
141.6 parts of vinylbenzene;
10.8 parts of acrylamides;
10 parts of organosilanes;
2.9 parts of persulphates;
429.3 parts in water;
Described emulsifying agent is a polyoxyethylene nonylphenol ether, and that the present invention selects for use is the NP-40 that Henkel KGaA company produces, and is called for short the NP-40 Henkel;
Described acrylate is a butyl acrylate, is called for short BA;
Described organosilane is a dimethyl silicone oil, and what the present invention selected for use is the organosilane that Hong Kong Dow Corning Corporation produces;
Described persulphate is Potassium Persulphate, Sodium Persulfate or ammonium persulphate;
Also contain Oxidizing and Reducing Agents in described vinylbenzene-acrylate polymer emulsion, be used to eliminate residual monomer;
Described oxygenant is a tertbutyl peroxide, is called for short FBH, and reductive agent is a rongalite, is called for short SSF.
Specially for heat insulating polystyrene outer-wall board binding agent of the present invention, vinylbenzene-acrylate polymer emulsion (SBC) with inorganic silica gel and organic-silicon-modified low Tg (second-order transition temperature) value, high-adhesion be a primary binder, doses reinforcement stopping composition such as quartz sand, asbestos and some auxiliary agents and synthesizes.
Advantage of the present invention is a particular embodiment from the following aspect:
1) the present invention selects low Tg value for use, and the organic polymer dispersion emulsion-vinylformic acid of high-adhesion adds and polystyrene board polarity and the consistent vinylbenzene of similarity simultaneously, to improve adhesive property;
2) the present invention adds organosilane in building-up process, to improve ageing-resistant performance, simultaneously, is keeping suitably improving hardness under the flexible basis;
3) because the ageing-resistant performance of inorganics is higher than organic ageing-resistant performance far away, therefore, the present invention adds inorganic silicon colloidal sol and the compound use of vinylbenzene-acrylate polymer emulsion, to strengthen the ageing-resistant performance of binding agent, simultaneously, utilize the hydrophilicity of silicon dioxide granule, and it is crosslinked with active group in the emulsion by thickening material surface active groups, sequestrant, thereby form dispersed system with the emulsion dispersion body, and can be dispersed in the cement mortar, not only improve the adhesive strength of product, but also improved the water resistance of product greatly;
4) after the hydroxyl of the selected vinylbenzene-acrylate polymer emulsion of the present invention and colloid silica are Heshui, form oxygen and sequestrant---the Cr on the hydroxyl
2(NO
3)
3In Cr
2 3+Outer unoccupied orbital carry out the coordination combination, finish crosslinkedly, the reaction of this graft crosslinking occurs in three operations: the crosslinking reaction between a macromolecule emulsion molecular chain forms network molecular structure; The affinity reaction of b colloid silica and water forms reticulated structure; The intermolecular formation reticulated structure of c thickening material, simultaneously, above-mentioned three kinds of network molecule chains are handed over and are formed bigger net, thereby improved the adhesive property of binding agent, also change simultaneously the high thixotropic energy of product, ensured the package stability and the good construction performance of product, and do not increased the cost of product.
5) high molecular polymer and the superfine silicon dioxide colloid selected for use of the present invention, be dispersed in the sand-cement slurry, can fill the gel pore that loses gel water after the drying and stay, thereby resistance water-sealed infiltration, even fine crack appears in sand-cement slurry after drying, as long as there is water to exist, swelling will take place in polymer particles and colloid, thereby the obstruction crackle strengthens anti-permeability.
6) the present invention adds filler, as quartz sand, asbestos, lime carbonate etc., mainly act as: a. reduces the shrinking percentage in the solidification process, improves the toughness and the mechanical property thereof of glue-line; B. can play thickening effectiveness, avoid glue cause starved or influence the thickening power of resin proportioning, fibrous material remarkable, can improve the angle sex change energy of resin, to control the flowability of rubber cement because of in solidification process, flowing; C. can play strengthening action, when a molecular chain is subjected to stress, can stress be disperseed to be delivered on other molecules by cross-linking set, if wherein a chain ruptures, other chains can work in the same old way, jeopardize integral body and be unlikely, so can increase considerably the adhesive property of binding agent at once.
In sum, heat insulating polystyrene outer-wall board adhesive special of the present invention, it is good to have a bond effect, the intensity height, ageing-resistant performance is strong, hardness height, advantage such as water resistance is strong.
In order clearly to show unusual effect of the present invention, formulate following experiment:
The bonding emulsion | Not siliceous elastic styrene acrylic emulsion (100g) | Siliceous elastic styrene acrylic emulsion (100g) | SBC70g silicon sol 50g | SBC70g |
Powder | 500 | 500 | 500 | 500 |
Dispersion | 7 | 7 | 7 | 7 |
Defoamer | 1.5 | 1.5 | 1.5 | 1.5 |
Ethylene glycol | 15 | 15 | 15 | 15 |
Become auxiliary agent | 5 | 5 | 5 | 5 |
Thickening material | 5 | 5 | 5 | 5 |
Water | 366.5 | 366.5 | 346.5 | 396.5 |
Scrubbing resistance | 123 times | 247 times | 255 times | 106 times |
Scratch-resistant | Relatively poor | Better | Good | Difference |
Show from above data:
1. organosilyl interpolation grafting is significantly increased to adhesive property;
2. the interpolation of inorganic silicon colloidal sol is significantly improved to adhesive property equally;
3. the adding of silicon sol has improved the hardness of binding agent.
Embodiment
Embodiment 1
The preparation of 1.30% silicon sol
With water glass towards rare NaSiO of 15% of being mixed with
3The aqueous solution, pressurization is by Zeo-karb, pH value is controlled at below 5.5, passes through anionite-exchange resin again, regulate between the pH value 8-10, under vacuum state in reactor with NaSiO
3The aqueous solution is heated to 80 degree, and the suction filtration evaporation when being 1.18-1.20 with density instrumentation density, can obtain 30% white silicon sol.
2. organosilicon modified styrene---the preparation of acrylate polymer emulsion
(1) raw material of preparation following weight:
One, pre-emulsion
Two, still material
Three, first initiator
Four, drip initiator
Five, oxygenant is eliminated in the back
Six, reductive agent is eliminated in the back
Seven, aqua ammonia (NH
4OH) about 4S PH=7.5-8.0
(2) concrete production technique
1. raw material two (still material) is put in the reactor, after stirring, the beginning chuck heats up;
With the A component in the raw material one in order successively weighing add in the monomer jar, the back that stirs is standby;
3. stand-by after raw material three, four being stirred in mixer respectively;
4. when the temperature of charge in the question response still rises to 82 ℃, add the pre-emulsified monomer of A component 34Kg in the step 2;
5. reactor stirred after 2 minutes, added raw material three (first initiator), maintained the temperature at 83-85 ℃, after 15 minutes, began to drip the pre-emulsified monomer of residue of A component, about 50-60 minute;
6. with the raw material weighing successively in order of the B component in the raw material one, and it is standby to add the back that stirs in the monomer jar;
7. raw material four is joined among the component B that has prepared, it is standby to stir;
After 8.A component drips, begin to drip the component in the said process 7, about 2 hours, temperature control 83-85 ℃;
9. after dripping end, temperature is remained on 83-85 ℃ carry out afterreaction, be incubated 1-2 hour;
10. cooling when treating that temperature in the kettle is reduced to below 70 ℃, is opened manhole, slowly adds raw material five, stirs after 20 minutes, adds raw material six again, continues to stir cooling;
11. when treating below the still temperature drop to 50 ℃, add the ammoniacal liquor of about 4.5Kg, adjustment PH:7.5-8 stirred after 20 minutes, vinylbenzene-acrylate polymer emulsion (SBC) emulsion.
(3) preparation of binding agent
Press following parts by weight weighing:
After above-mentioned A component stirred half an hour, under whipped state, add the B component successively, disperse to be binding agent of the present invention after 20 minutes.
With binding agent of the present invention with cement by 1: 1-1: 1.3 weight ratios and less water mixing can use.
Embodiment 2
The preparation of 1.30% silicon sol
Concrete preparation method is with embodiment 1.
2. organosilicon modified styrene---the preparation of acrylate polymer emulsion
(1) raw material of preparation following weight:
One, pre-emulsion
Two, still material
Three, first initiator
Four, drip initiator
Five, oxygenant is eliminated in the back
Six, reductive agent is eliminated in the back
Seven, aqua ammonia (NH
4OH) about 4S PH=7.5-8.0
(2) concrete production technique
Concrete production technique is with embodiment 1.
(3) preparation of binding agent
Press following parts by weight weighing:
After above-mentioned A component stirred half an hour, under whipped state, add the B component successively, disperse to be binding agent of the present invention after 20 minutes.
With binding agent of the present invention with cement by 1: 1-1: 1.3 weight ratios and less water mixing can use.
Embodiment 3
The preparation of 1.30% silicon sol
Concrete preparation method is with embodiment 1.
2. organosilicon modified styrene---the preparation of acrylate polymer emulsion
(1) raw material of preparation following weight:
One, pre-emulsion
Two, still material
Three, first initiator
Four, drip initiator
Five, oxygenant is eliminated in the back
Six, reductive agent is eliminated in the back
Seven, aqua ammonia (NH
4OH) about 4S PH=7.5-8.0
(2) the concrete concrete production technique of production technique is with embodiment 1.
(3) preparation of binding agent
Press following parts by weight weighing:
After above-mentioned A component stirred half an hour, under whipped state, add the B component successively, disperse to be binding agent of the present invention after 20 minutes.
With binding agent of the present invention with cement by 1: 1-1: 1.3 weight ratios and less water mixing can use.