CN104987822A - Polyurethane breathable, highly-elastic and waterproof coating formula and production method therefor - Google Patents
Polyurethane breathable, highly-elastic and waterproof coating formula and production method therefor Download PDFInfo
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Abstract
The present invention discloses a polyurethane breathable, highly-elastic and waterproof coating formula. The formula comprises the following components in parts by weight: 150-200 parts of deionized water; 1-5 parts of hydroxyethylcellulose; 1-5 parts of fungicides; 10-25 parts of ethylene glycol; 10-25 parts of a film former; 2-10 parts of a dispersant; 2-8 parts of a wetting agent; 2-10 parts of a defoamer; 1-5 parts of an air-entraining agent; 150-220 parts of titanium dioxide; 8-20 parts of aluminium silicate; 100-200 parts of 2500-grit triple superphosphate; 200-500 parts of a PU emulsion; 50-150 parts of a silicone resin; 0-10 parts of a leveling agent; and 5-15 parts of a thickening agent. The present invention is formed by mixing the PU emulsion and the aqueous silicone resin, and is capable of keeping the paint film in an open state for a long time under the waterproof condition so that the wall surface can self-breathe permanently, and the tensile strength of the paint film is obviously increased.
Description
Technical field
The present invention relates to coating, more particularly, it relates to a kind of urethane and to breathe freely high-elastic waterproof coating formula and production method thereof.
Background technology
Polyurethane coating and PU coating are a class coating more common at present, can be divided into bicomponent polyurethane coating and one-can urethane coating.Bicomponent polyurethane coating is generally made up of isocyanate prepolymer (being also low molecule urethane polymer) and hydroxy-containing resin two portions, is commonly referred to curing agent component and host component.The kind of this class coating is a lot, and range of application is also very wide, and the difference according to hydroxy-containing component can be divided into the kinds such as acroleic acid polyurethane, alcohol acid and polyurethane, polyester-polyurethane, polyether-polyurethane, epoxy polyurethane.General all have good mechanical property, higher solids content, each side performance all relatively good.It is a class coating variety rising at present.Main application direction has woodwork coating, automobile repairing paint, protective system, floor paint, electronic paint, speciality coating, polyurethane water-proof paint etc.Shortcoming is that working procedure is complicated, and require very high to construction environment, paint film easily produces disadvantage.One-can urethane coating mainly contains the kinds such as ammonia ester oil coating, moisture solidification polyurethane coating, blocked polyurethane paint.Application surface is wide not as two-component coating, and be mainly used in Floor paint, protective system, pre-coil coating etc., its overall performance is comprehensive not as two-component coating.
But urethane is relatively tight in hinge process, therefore, poor in ventilation property, particularly when rainy weather, because permeability is poor, make moisture can be gathered in body of wall inside, body of wall inside is caused easily to grow fungi, give out peculiar smell, destroy wall body structure simultaneously, reduce body of wall work-ing life.
Summary of the invention
For the deficiency that prior art exists, the object of this reality invention is the production method of the PU formulation for coating material providing a kind of good permeability.
For achieving the above object, the invention provides following technical scheme:
A kind of urethane is breathed freely high-elastic waterproof coating formula, comprises
The component of following weight part is formed:
Deionized water 150 ~ 200 parts;
Natvosol 1 ~ 5 part;
1 ~ 5 part, sterilant;
Ethylene glycol 10 ~ 25 parts;
Membrane-forming agent 10 ~ 25 parts;
Dispersion agent 2 ~ 10 parts;
Wetting agent 2 ~ 8 parts;
Defoamer 2 ~ 10 parts;
Air entrapment agent 1 ~ 5 part;
Titanium dioxide 150 ~ 220 parts;
Pure aluminium silicate 8 ~ 20 parts;
2500 order coarse whitings 100 ~ 200 parts;
PU emulsion 200 ~ 500 parts;
Silicone resin 50 ~ 150 parts;
Flow agent 0 ~ 10 part;
Thickening material 5 ~ 15 parts.
Its technical process is as follows:
Step one: deionized water and Natvosol are joined in stirring tank and carries out abundant dispersed with stirring;
Step 2: after deionized water and hydroxy ethyl fiber fully mix, continues to add sterilant, ethylene glycol, membrane-forming agent, dispersion agent, wetting agent, defoamer, air entrapment agent carries out abundant dispersed with stirring;
Step 3: after mixture fully mixes in step 2, adds titanium dioxide, pure aluminium silicate, 2500 order coarse whitings, is uniformly mixed;
Step 4: after mixture fully mixes in step 3, adds PU emulsion, silicone resin, is uniformly mixed;
Step 5: after mixture fully mixes in step 4, adds flow agent and thickening material adjustment viscosity, is uniformly mixed, obtains coating.
Deionized water in step one and Natvosol are as a kind of matrix for dissolving, Natvosol is a kind of white or faint yellow, tasteless, nontoxic threadiness or pulverulent solids, prepared through etherification reaction by alkali cellulose and oxyethane (or chloroethanol), belong to non-ionic type soluble fiber element ethers.Due to Natvosol, there is good thickening, suspension, dispersion, emulsification, bonding, film forming, protection moisture and the characteristics such as protective colloid are provided; a provide protection is had to the material that the later stage adds; the viscosity of matrix can also be increased simultaneously; later stage can add a part of mineral filler; if viscosity is too low; can there is sedimentation in mineral filler, be deposited in bottom coating.
Step 2, mainly after deionized water and hydroxy ethyl fiber fully mix, with the speed of 600 ~ 1000 turns, adds sterilant, ethylene glycol, membrane-forming agent, dispersion agent, wetting agent, defoamer, air entrapment agent carries out abundant dispersed with stirring 3-5 minute;
In the selection of sterilant, select at least one in MIT, CMIT, 4,5-bis-chloro-2-n-octyl-3-isothiazolinone.
Isothiazolinone antiseptic-germicide, have the performance of efficient sterilizing, heat-resisting, hydrolysis, while ensure that sterilization effect, also can be applicable to the use of various environment, in the presence of a harsh environment, its sterilization effect also can not weaken.
Ethylene glycol serves as the filmogen dissolving in coating or is separated into uniform liquid state in system of the present invention, so that construction film forming, when evaporating into again the material of air after construction from paint film, plays antifreeze anti-encrustation simultaneously.
Membrane-forming agent select propylene glycol phenylate, when propylene glycol phenylate adds latex system, redistribute in aqueous phase and polymerization mutually, the film forming usefulness of its excellence is decided by the partition ratio that it is minimum in two-phase, ensure its good plasticization effect and suitable rate of volatilization balance simultaneously, propylene glycol phenylate is colourless transparent liquid, and smell is gentle.To most latex and resin, there is extremely strong dissolving power, water-soluble little, ensure that it is absorbed completely by emulsion particle, thus give the best coalescent performance of emulsion paint and color development homogeneity, there is excellent package stability simultaneously.
Dispersion agent selects polyacrylate, stablizes temperature variation, has the effect of fixing metal ions, and metal ion can be stoped the negative influence of product, is a kind of tensio-active agent with multiple property, is conventional dispersion agent.
Diisobutyl sodium naphthalene sulfonate then selected by wetting agent, belongs to anion surfactant, and significantly can reduce the surface tension of water, have excellent seepage force and wettability, rewetting is also splendid, and has emulsification, spreads and the performance that spumes.Its good stability, acidproof, alkaline-resisting, but can not mercerising alkaline bath, resistance to hard water, the sodium-chlor adding relative diisobutyl sodium naphthalene sulfonate about 5% can strengthen its seepage force, is conventional wetting agent.
Defoamer is dimethyl siloxane, is a kind of organosilicon material of hydrophobic class.Because its surface tension is large, be suitable as defoamer and use.
Air entrapment agent is sodium lauryl sulphate, sodium lauryl sulphate, white or faint yellow powdery, water-soluble, to alkali and hard water insensitive.There is the foaming power of decontamination, emulsification and excellence.It is a kind of nontoxic anion surfactant.
By add in step 2 main be all functional agent, the molecular weight of functional agent is general less, but kind is more, therefore even to carrying out dispersed with stirring to it, what make it possible to disperses, if first add coating film forming matrix to good, because viscosity is larger, functional agent dispersion is uneven, causes a part of partial result good, the problem of another part weak effect.
Step three, after mixture fully mixes in step 2, with the rotating speed of 2000 ~ 2500, adds titanium dioxide, pure aluminium silicate, 2500 order coarse whitings, is uniformly mixed;
Here the mainly inorganic modified auxiliary agent added, by titanium dioxide, pure aluminium silicate, the adding of 2500 order coarse whitings, serves and makes coating possess certain color, have certain photoextinction simultaneously.
Because titanium dioxide, pure aluminium silicate, 2500 order coarse whiting particles are comparatively large, therefore need to improve rotating speed in the process added, can fully mix.Simultaneously the excessive consequence caused of particle easily produces bubble in addition, and therefore, just dispersed defoamer in step 2, so just can by bubble elimination in mixing process, thus the generation of minimizing bubble, also shorten foam time.
Step 4, for after mixture fully mixes in step 3, with 600 ~ 1000 rotating speeds, adds PU emulsion, silicone resin, is uniformly mixed;
Adopt PU latex composite compounding water-based dimethyldichlorosilane(DMCS).The hinge that the hinge of dimethyldichlorosilane(DMCS) self and main filmogen PU emulsion are intersected, forms silicone network structure.Paint film material top layer is hydrophobic in nature, and porous construction material can be stoped the absorption of moisture, and free-water in material of construction can be kept freely to discharge, and arrives the effect that oneself breathes.The interpolation of silicone resin can avoid the generation of the phenomenons such as the accumulation of salt in the surface soil in addition, ensures the attractive in appearance of facade lastingly.Pliable and tough characteristic and the silicone resin hydrophobic nature of PU densification form complementation, have good waterproof effect.
Simultaneously can the unit elongation of superelevation, PU emulsion of the present invention and dimethyldichlorosilane(DMCS) intersect hinge in one, provide paint film to have enough tensile strengths and unit elongation, can be large in the temperature difference, and yielding base material is coated with.The feature that dimethyldichlorosilane(DMCS) to have under high temperature not easily plasticizing be clamminess and causes anti-pollution characteristic to decline.
Reach execution conditions a little loose simultaneously, product drying speed has respiration capability soon, can construct when substrate moisture rate is high, between China region, weather difference is larger, but PU film forming adapts to strong to temperature variation, can-5 ~ 45 DEG C of constructions, substantially can in national different geographical Various Seasonal construction, silicone resin adds the infiltration improved base material, and base material is not firmly loosened, the levelling of its excellence is capable, and no matter temperature can by paint film levelling to without brush mark 40 DEG C time.
Step 5 is, after in step 4, mixture fully mixes, the rotating speed with 800 adds flow agent and thickening material adjustment viscosity, is uniformly mixed, obtains coating.
Particularly flow agent and thickening material join in stirring tank after being watered with 1:1 respectively and are uniformly mixed.
Join in stirring tank after flow agent and thickening material are watered with 1:1 respectively and mainly play a diluting effect, prevent flow agent and thickening material from adding fashionable concentration excessive, coating local is impacted comparatively large, cause average behaviour not good.
At least one in conventional Natvosol, methyl hydroxyethylcellulose, Type 3U, methylhydroxypropylcellulose, methylcellulose gum selected by thickening material.
Flow agent person selects butyl ether polydimethylsiloxane.Polydimethylsiloxane is a kind of respond well flow agent inherently, by introducing butyl ether on this basis, can be improved it water-soluble, thus reach better surfactivity, in water-borne coatings, solvability is higher simultaneously, therefore selects butyl ether polydimethylsiloxane selecting of flow agent.
Formed by PU latex composite compounding waterborne organic silicon resin, can paint film be made to be in open state for a long time in fluid-tight situation, make metope obtain permanent oneself and breathe, and significantly improve the tensile strength of paint film.
Embodiment
A kind of urethane is breathed freely high-elastic waterproof coating formula, comprises
Its technical process is as follows:
Step one: deionized water and Natvosol are joined in stirring tank and carries out abundant dispersed with stirring;
Step 2: after deionized water and hydroxy ethyl fiber fully mix, continues to add sterilant, ethylene glycol, membrane-forming agent, dispersion agent, wetting agent, defoamer, air entrapment agent carries out abundant dispersed with stirring;
Step 3: after mixture fully mixes in step 2, adds titanium dioxide, pure aluminium silicate, 2500 order coarse whitings, is uniformly mixed;
Step 4: after mixture fully mixes in step 3, adds PU emulsion, silicone resin, is uniformly mixed;
Step 5: after mixture fully mixes in step 4, adds flow agent and thickening material adjustment viscosity, is uniformly mixed, obtains coating.
Deionized water in step one and Natvosol are as a kind of matrix for dissolving, Natvosol is a kind of white or faint yellow, tasteless, nontoxic threadiness or pulverulent solids, prepared through etherification reaction by alkali cellulose and oxyethane (or chloroethanol), belong to non-ionic type soluble fiber element ethers.Due to Natvosol, there is good thickening, suspension, dispersion, emulsification, bonding, film forming, protection moisture and the characteristics such as protective colloid are provided; a provide protection is had to the material that the later stage adds; the viscosity of matrix can also be increased simultaneously; later stage can add a part of mineral filler; if viscosity is too low; can there is sedimentation in mineral filler, be deposited in bottom coating.
Step 2, mainly after deionized water and hydroxy ethyl fiber fully mix, with the speed of 600 ~ 1000 turns, adds sterilant, ethylene glycol, membrane-forming agent, dispersion agent, wetting agent, defoamer, air entrapment agent carries out abundant dispersed with stirring 3-5 minute;
In the selection of sterilant, select MIT, CMIT, 4, at least one in 5-bis-chloro-2-n-octyl-3-isothiazolinone, BIT, n-butyl-1,2-isothiazoline-3-ketone.
Isothiazolinone antiseptic-germicide, have the performance of efficient sterilizing, heat-resisting, hydrolysis, while ensure that sterilization effect, also can be applicable to the use of various environment, in the presence of a harsh environment, its sterilization effect also can not weaken.
Ethylene glycol serves as the filmogen dissolving in coating or is separated into uniform liquid state in system of the present invention, so that construction film forming, when evaporating into again the material of air after construction from paint film, plays antifreeze anti-encrustation simultaneously.
Membrane-forming agent select propylene glycol phenylate, when propylene glycol phenylate adds latex system, redistribute in aqueous phase and polymerization mutually, the film forming usefulness of its excellence is decided by the partition ratio that it is minimum in two-phase, ensure its good plasticization effect and suitable rate of volatilization balance simultaneously, propylene glycol phenylate is colourless transparent liquid, and smell is gentle.To most latex and resin, there is extremely strong dissolving power, water-soluble little, ensure that it is absorbed completely by emulsion particle, thus give the best coalescent performance of emulsion paint and color development homogeneity, there is excellent package stability simultaneously.
Dispersion agent selects polyacrylate, stablizes temperature variation, has the effect of fixing metal ions, and metal ion can be stoped the negative influence of product, is a kind of tensio-active agent with multiple property, is conventional dispersion agent.
Diisobutyl sodium naphthalene sulfonate then selected by wetting agent, belongs to anion surfactant, and significantly can reduce the surface tension of water, have excellent seepage force and wettability, rewetting is also splendid, and has emulsification, spreads and the performance that spumes.Its good stability, acidproof, alkaline-resisting, but can not mercerising alkaline bath, resistance to hard water, the salt adding relative diisobutyl sodium naphthalene sulfonate about 5% can strengthen its seepage force, is conventional wetting agent.
Air entrapment agent is sodium lauryl sulphate, sodium lauryl sulphate, white or faint yellow powdery, water-soluble, to alkali and hard water insensitive.There is the foaming power of decontamination, emulsification and excellence.It is a kind of nontoxic anion surfactant.
By add in step 2 main be all functional agent, the molecular weight of functional agent is general less, but kind is more, therefore even to carrying out dispersed with stirring to it, what make it possible to disperses, if first add coating film forming matrix to good, because viscosity is larger, functional agent dispersion is uneven, causes a part of partial result good, the problem of another part weak effect.
Step three, after mixture fully mixes in step 2, with the rotating speed of 2000 ~ 2500, adds titanium dioxide, pure aluminium silicate, 2500 order coarse whitings, is uniformly mixed;
Here the mainly inorganic modified auxiliary agent added, by titanium dioxide, pure aluminium silicate, the adding of 2500 order coarse whitings, serves and makes coating possess certain color, have certain photoextinction simultaneously.
Because titanium dioxide, pure aluminium silicate, 2500 order coarse whiting particles are comparatively large, therefore need to improve rotating speed in the process added, can fully mix.Simultaneously the excessive consequence caused of particle easily produces bubble in addition, and therefore, just dispersed defoamer in step 2, so just can by bubble elimination in mixing process, thus the generation of minimizing bubble, also shorten foam time.
Step 4, for after mixture fully mixes in step 3, with 600 ~ 1000 rotating speeds, adds PU emulsion, silicone resin, is uniformly mixed;
Adopt PU latex composite compounding water-based dimethyldichlorosilane(DMCS).The hinge that the hinge of dimethyldichlorosilane(DMCS) self and main filmogen PU emulsion are intersected, forms silicone network structure.Paint film material top layer is hydrophobic in nature, and porous construction material can be stoped the absorption of moisture, and free-water in material of construction can be kept freely to discharge, and arrives the effect that oneself breathes.The interpolation of silicone resin can avoid the generation of the phenomenons such as the accumulation of salt in the surface soil in addition, ensures the attractive in appearance of facade lastingly.Pliable and tough characteristic and the silicone resin hydrophobic nature of PU densification form complementation, have good waterproof effect.
Simultaneously can the unit elongation of superelevation, PU emulsion of the present invention and dimethyldichlorosilane(DMCS) intersect hinge in one, provide paint film to have enough tensile strengths and unit elongation, can be large in the temperature difference, and yielding base material is coated with.The feature that dimethyldichlorosilane(DMCS) to have under high temperature not easily plasticizing be clamminess and causes anti-pollution characteristic to decline.
Reach execution conditions a little loose simultaneously, product drying speed has respiration capability soon, can construct when substrate moisture rate is high, between China region, weather difference is larger, but PU film forming adapts to strong to temperature variation, can-5 ~ 45 DEG C of constructions, substantially can in national different geographical Various Seasonal construction, silicone resin adds the infiltration improved base material, and base material is not firmly loosened, the levelling of its excellence is capable, and no matter temperature can by paint film levelling to without brush mark 40 DEG C time.
Step 5 is, after in step 4, mixture fully mixes, the rotating speed with 800 adds flow agent and thickening material adjustment viscosity, is uniformly mixed, obtains coating.
Particularly flow agent and thickening material join in stirring tank after being watered with 1:1 respectively and are uniformly mixed.
Join in stirring tank after flow agent and thickening material are watered with 1:1 respectively and mainly play a diluting effect, prevent flow agent and thickening material from adding fashionable concentration excessive, coating local is impacted comparatively large, cause average behaviour not good.
At least one in conventional Natvosol, methyl hydroxyethylcellulose, Type 3U, methylhydroxypropylcellulose, methylcellulose gum selected by thickening material.
Flow agent person selects butyl ether polydimethylsiloxane.Polydimethylsiloxane is a kind of respond well flow agent inherently, by introducing butyl ether on this basis, can be improved it water-soluble, thus reach better surfactivity, in water-borne coatings, solvability is higher simultaneously, therefore selects butyl ether polydimethylsiloxane selecting of flow agent.
Embodiment one:
Deionized water 178g;
Natvosol 8.3g;
CMIT 3g;
Ethylene glycol 22g;
Propylene glycol phenylate 18g;
Sodium polyacrylate 6g;
Diisobutyl sodium naphthalene sulfonate 2.5g;
Dimethyl siloxane 5g;
Sodium lauryl sulphate 3g;
Titanium dioxide 190g;
Pure aluminium silicate 12.5g;
2500 order coarse whiting 150g;
PU emulsion 300g;
Dimethyldichlorosilane(DMCS) 100g;
Butyl ether polydimethylsiloxane 5g;
Step one: join with the speed of 800 turns by deionized water 178g and Natvosol 1.3g, carry out abundant dispersed with stirring in stirring tank, disperses 5 minutes;
Step 2: after deionized water and hydroxy ethyl fiber fully mix, with the speed of 800 turns, add CMIT 3g, ethylene glycol 22g, propylene glycol phenylate 18g, sodium polyacrylate 6g, diisobutyl sodium naphthalene sulfonate 2.5g, dimethyl siloxane 5g, sodium lauryl sulphate 3g carry out abundant dispersed with stirring 5 minutes;
Step 3: after mixture fully mixes in step 2, with the rotating speed of 2000, adds titanium dioxide 190g, pure aluminium silicate 12.5g, 2500 order coarse whiting 150g, is uniformly mixed;
Step 4: after mixture fully mixes in step 3, with 800 rotating speeds, adds PU emulsion 300g, dimethyldichlorosilane(DMCS) 100g, is uniformly mixed;
Step 5: after mixture fully mixes in step 4, after butyl ether polydimethylsiloxane 5g and Natvosol 8g is watered with 1:1 respectively, the rotating speed joined with 800 in stirring tank is uniformly mixed, and obtains coating.
Embodiment two:
Deionized water 200g;
Natvosol 5g;
MIT 5g;
Ethylene glycol 23g;
Propylene glycol phenylate 23g;
Polyacrylic acid zinc 8g;
Diisobutyl sodium naphthalene sulfonate 8g;
Dimethyl siloxane 8g;
Sodium lauryl sulphate 5g;
Titanium dioxide 200g;
Pure aluminium silicate 18g;
2500 order coarse whiting 180g;
PU emulsion 450g;
Dimethyldichlorosilane(DMCS) 130g;
Butyl ether polydimethylsiloxane 5g;
Methyl hydroxyethylcellulose 13g;
Step one: join with the speed of 800 turns by deionized water 200g and Natvosol 5g, carry out abundant dispersed with stirring in stirring tank, disperses 5 minutes;
Step 2: after deionized water and hydroxy ethyl fiber fully mix, with the speed of 800 turns, add MIT 5g, ethylene glycol 23g, propylene glycol phenylate 23g, polyacrylic acid zinc 6g, diisobutyl sodium naphthalene sulfonate 8g, dimethyl siloxane 8g, sodium lauryl sulphate 5g carry out abundant dispersed with stirring 5 minutes;
Step 3: after mixture fully mixes in step 2, with the rotating speed of 2000, adds titanium dioxide 200g, pure aluminium silicate 18g, 2500 order coarse whiting 180g, is uniformly mixed;
Step 4: after mixture fully mixes in step 3, with 800 rotating speeds, adds PU emulsion 450g, dimethyldichlorosilane(DMCS) 130g, is uniformly mixed;
Step 5: after mixture fully mixes in step 4, after butyl ether polydimethylsiloxane 5g and methyl hydroxyethylcellulose 13g is watered with 1:1 respectively, the rotating speed joined with 800 in stirring tank is uniformly mixed, and obtains coating.
Embodiment three:
Deionized water 140g;
Natvosol 2g;
MIT 2g;
Ethylene glycol 13g;
Propylene glycol phenylate 15g;
Polyacrylic acid zinc 3g;
Diisobutyl sodium naphthalene sulfonate 3g;
Dimethyl siloxane 3g;
Sodium lauryl sulphate 2g;
Titanium dioxide 155g;
Pure aluminium silicate 10g;
2500 order coarse whiting 120g;
PU emulsion 230g;
Dimethyldichlorosilane(DMCS) 80g;
Butyl ether polydimethylsiloxane 3g;
Methyl hydroxyethylcellulose 6g;
Step one: join with the speed of 800 turns by deionized water 140g and Natvosol 2g, carry out abundant dispersed with stirring in stirring tank, disperses 5 minutes;
Step 2: after deionized water and hydroxy ethyl fiber fully mix, with the speed of 800 turns, add MIT 2g, ethylene glycol 13g, propylene glycol phenylate 15g, polyacrylic acid zinc 3g, diisobutyl sodium naphthalene sulfonate 3g, dimethyl siloxane 3g, sodium lauryl sulphate 2g carry out abundant dispersed with stirring 5 minutes;
Step 3: after mixture fully mixes in step 2, with the rotating speed of 2300, adds titanium dioxide 155g, pure aluminium silicate 10g, 2500 order coarse whiting 120g, is uniformly mixed;
Step 4: after mixture fully mixes in step 3, with 800 rotating speeds, adds PU emulsion 230g, dimethyldichlorosilane(DMCS) 80g, is uniformly mixed;
Step 5: after mixture fully mixes in step 4, after butyl ether polydimethylsiloxane 6g and methyl hydroxyethylcellulose 6g is watered with 1:1 respectively, the rotating speed joined with 800 in stirring tank is uniformly mixed, and obtains coating.
Embodiment four:
Deionized water 160g;
Natvosol 6g;
MIT 4g;
Ethylene glycol 20g;
Propylene glycol phenylate 18g;
Polyacrylic acid zinc 6g;
Diisobutyl sodium naphthalene sulfonate 3g;
Dimethyl siloxane 6g;
Sodium lauryl sulphate 4g;
Titanium dioxide 180g;
Pure aluminium silicate 16g;
2500 order coarse whiting 140g;
PU emulsion 350g;
Dimethyldichlorosilane(DMCS) 100g;
Butyl ether polydimethylsiloxane 6g;
Methyl hydroxyethylcellulose 4g;
Step one: join with the speed of 800 turns by deionized water 160g and Natvosol 3g, carry out abundant dispersed with stirring in stirring tank, disperses 5 minutes;
Step 2: after deionized water and hydroxy ethyl fiber fully mix, with the speed of 800 turns, add MIT 4g, ethylene glycol 20g, propylene glycol phenylate 18g, polyacrylic acid zinc 6g, diisobutyl sodium naphthalene sulfonate 3g, dimethyl siloxane 6g, sodium lauryl sulphate 4g carry out abundant dispersed with stirring 5 minutes;
Step 3: after mixture fully mixes in step 2, with the rotating speed of 2300, adds titanium dioxide 180g, pure aluminium silicate 16g, 2500 order coarse whiting 140g, is uniformly mixed;
Step 4: after mixture fully mixes in step 3, with 800 rotating speeds, adds PU emulsion 350g, dimethyldichlorosilane(DMCS) 100g, is uniformly mixed;
Step 5: after mixture fully mixes in step 4, butyl ether polydimethylsiloxane 6g, methyl hydroxyethylcellulose 4g, Natvosol 3g after being watered with 1:1 respectively the rotating speed joined with 800 in stirring tank be uniformly mixed, obtain coating.
Comparative example:
Deionized water 200 parts;
Propylene glycol phenylate 20 parts;
Polyacrylate 8 parts;
Silicone oil 8 parts;
Titanium dioxide 200 parts;
Pure aluminium silicate 120 parts;
2500 order coarse whitings 150 parts;
PU emulsion 400 parts;
Polydimethylsiloxane 5 parts;
Natvosol 5 parts.
Above-mentioned raw materials is mixed, obtains comparative example coating.
The coating prepared embodiment one, embodiment two, embodiment three, embodiment four, comparative example carries out tensile strength, breaking tenacity elongation, low-temperature bending, surface drying time, does solid work the time, water-permeable is tested.
From passable the going out of upper table, the PU prepared by the present invention high-elastic waterproof coating of breathing freely is had outside good tensile strength, breaking tenacity elongation, low-temperature bending and watertightness at normal temperatures, even if still possess good tensile strength, breaking tenacity elongation, low-temperature bending and watertightness after using under the high temperature conditions.
The above is only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, and all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. urethane is breathed freely a high-elastic waterproof coating formula, comprises
The component of following weight part is formed:
Deionized water 150 ~ 200 parts;
Natvosol 1 ~ 5 part;
1 ~ 5 part, sterilant;
Ethylene glycol 10 ~ 25 parts;
Membrane-forming agent 10 ~ 25 parts;
Dispersion agent 2 ~ 10 parts;
Wetting agent 2 ~ 8 parts;
Defoamer 2 ~ 10 parts;
Air entrapment agent 1 ~ 5 part;
Titanium dioxide 150 ~ 220 parts;
Pure aluminium silicate 8 ~ 20 parts;
2500 order coarse whitings 100 ~ 200 parts;
PU emulsion 200 ~ 500 parts;
Silicone resin 50 ~ 150 parts;
Flow agent 0 ~ 10 part;
Thickening material 5 ~ 15 parts.
2. a kind of urethane according to claim 1 is breathed freely high-elastic waterproof coating formula, and it is characterized in that, described membrane-forming agent is propylene glycol phenylate, and described wetting agent is diisobutyl sodium naphthalene sulfonate.
3. a kind of urethane according to claim 1 is breathed freely high-elastic waterproof coating formula, and it is characterized in that, silicone resin is dimethyldichlorosilane(DMCS).
4. a kind of urethane according to claim 3 is breathed freely high-elastic waterproof coating formula, it is characterized in that: described flow agent is butyl ether polydimethylsiloxane.
5. a kind of urethane according to claim 3 is breathed freely high-elastic waterproof coating formula, it is characterized in that: described defoamer is dimethyl siloxane, described thickening material is at least one in Natvosol, methyl hydroxyethylcellulose, Type 3U.
6. a kind of urethane according to claim 3 is breathed freely high-elastic waterproof coating formula, and it is characterized in that: described dispersion agent is polyacrylate, described air entrapment agent is sodium lauryl sulphate.
7. a kind of urethane according to claim 1 or 2 or 3 is breathed freely high-elastic waterproof coating formula, it is characterized in that: described sterilant is at least one in MIT, CMIT.
8. urethane according to claim 1 breathe freely high-elastic waterproof coating formula production method, it is characterized in that:
Step one: deionized water and Natvosol are joined in stirring tank and carries out abundant dispersed with stirring;
Step 2: after deionized water and hydroxy ethyl fiber fully mix, continues to add sterilant, ethylene glycol, membrane-forming agent, dispersion agent, wetting agent, defoamer, air entrapment agent carries out abundant dispersed with stirring;
Step 3: after mixture fully mixes in step 2, adds titanium dioxide, pure aluminium silicate, 2500 order coarse whitings, is uniformly mixed;
Step 4: after mixture fully mixes in step 3, adds PU emulsion, silicone resin, is uniformly mixed;
Step 5: after mixture fully mixes in step 4, adds flow agent and thickening material adjustment viscosity, is uniformly mixed, obtains coating.
9. urethane according to claim 8 breathe freely high-elastic waterproof coating formula production method, it is characterized in that:
Step one: deionized water and Natvosol are joined with the speed of 500 ~ 1000 turns, carry out abundant dispersed with stirring in stirring tank, disperses 3 ~ 10 minutes;
Step 2: after deionized water and hydroxy ethyl fiber fully mix, with the speed of 600 ~ 1000 turns, adds sterilant, ethylene glycol, membrane-forming agent, dispersion agent, wetting agent, defoamer, air entrapment agent carries out abundant dispersed with stirring 3-5 minute;
Step 3: after mixture fully mixes in step 2, with the rotating speed of 2000 ~ 2500, adds titanium dioxide, pure aluminium silicate, 2500 order coarse whitings, is uniformly mixed;
Step 4: after mixture fully mixes in step 3, with 600 ~ 1000 rotating speeds, adds PU emulsion, silicone resin, is uniformly mixed;
Step 5: after mixture fully mixes in step 4, the rotating speed with 800 adds flow agent and thickening material adjustment viscosity, is uniformly mixed, obtains coating.
10. urethane is according to claim 8 or claim 9 breathed freely the production method of high-elastic waterproof coating formula, and it is characterized in that: in described step 4, flow agent and thickening material join in stirring tank after being watered with 1:1 respectively and be uniformly mixed.
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