CN101565570A - Composite latex for paints, water paint and preparation method of water paint - Google Patents
Composite latex for paints, water paint and preparation method of water paint Download PDFInfo
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- CN101565570A CN101565570A CNA200810104605XA CN200810104605A CN101565570A CN 101565570 A CN101565570 A CN 101565570A CN A200810104605X A CNA200810104605X A CN A200810104605XA CN 200810104605 A CN200810104605 A CN 200810104605A CN 101565570 A CN101565570 A CN 101565570A
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Abstract
The invention relates to a composite nanometer oxide latex for paints, a water paint containing the latex and a preparation method of the water paint. The latex consists of a monomer mixture, an emulsifier, a film-forming additive, an initiator, sodium bicarbonate, a pH regulator, an antifoamer, deionized water and nanometer oxide slurry, wherein the nanometer oxide slurry is prepared by firstly dispersing a nanometer oxide, a surfactant and water in a dispersion machine and then sand grinding dispersion in sand grinder; the nanometer oxide is one or two or three of Al2O3, ZnO and TiO2; and the monomer mixture consists of methyl acrylate, methyl methacrylate, diacetone-acryloamide and butyl acrylate. In the synthesis process of the latex of the invention, the nanometer oxide slurry is added, so that nanometer particles can be uniformly and stably combined with synthesized macromolecules to show the functionality of a nanometer material and to realize the excellent hardness, wear resistance and soiling resistance of the water paint containing the composite nanometer oxide latex for paints.
Description
Technical field
The present invention relates to a kind of composite latex for paints and water-borne coatings and preparation method.
Background technology
Water-borne coatings kind in the market is a lot, but often there is born defective in these water-borne coatingss, and is softer such as filming, not wear-resisting, the easy pollution in surface etc.Existing common coating with the common preparation method of emulsion is: one or more in employing acrylic monomer and other monomers, under aqueous environments, add emulsifying agent and initiator, and be prepared into organic emulsion.
In the prior art,, normally add some mineral fillers in the later stage for water-borne coatings is carried out modification, addition is few, and is little to the film performance influence, when addition is big, though can obtain corresponding hardness, easy powder of detached is so this method can solve subproblem in some cases.In the process of synthetic emulsion, add nanometer oxide material, form with emulsion polymer compound organic/inorganic composite and can solve the problem that exists from molecular resin.
Summary of the invention
The objective of the invention is the problem that exists at above prior art and a kind of coating organic or inorganic composite emulsion and water-borne coatings and preparation method are provided.Coating of the present invention has added the nano-oxide slurry with the organic or inorganic composite emulsion in preparation process, make it participate in the polyreaction of emulsion, thereby the formation nano-composite emulsion has good hardness, wear resistance and resistance to soiling with the water-borne coatings of this emulsion preparation.
Technical scheme of the present invention is as follows:
Coating provided by the invention is made up of the monomer mixture of 56-150 weight part, the emulsifying agent of 1.0-2.0 weight part, the sodium lauryl sulphate of 1.0-2.0 weight part, the initiator of 0.4-1.0 weight part, the sodium bicarbonate of 0.3-0.6 weight part, the pH regulator agent of 1.0-2.5 weight part, the defoamer of 0.3-0.8 weight part, the deionized water of 80-100 weight part and the nano-oxide slurry of 4-10 weight part with organic or inorganic composite emulsion and water-borne coatings;
Described nano-oxide slurry is disperseed in dispersion machine by the nano-oxide of 20-40 weight part, the tensio-active agent of 0.5-2 weight part and the water of 60-100 weight part, carries out sand milling and makes at sand mill more afterwards; Described nano-oxide is Al
2O
3, ZnO and TiO
2In a kind of, two kinds or three kinds;
Described monomer mixture is made up of the methyl methacrylate of 20-45 parts by weight of acrylic methyl esters, 20-40 weight part, the acrylamide and the 15-55 parts by weight of acrylic butyl ester of 1-5 weight part.
Described emulsifying agent is alkylphenol polyoxyethylene or alkylphenol polyoxyethylene ammonium sulfate emulsifying agent; Described initiator is ammonium persulphate or Potassium Persulphate; Described pH regulator agent select in ammoniacal liquor, trolamine and the 2-amino-2-methyl-1-propanol a kind of, two kinds or three kinds; Described defoamer is an organo-siloxane.Described tensio-active agent is the compound of aniorfic surfactant and nonionogenic tenside.
The coating provided by the invention preparation method of composite nano oxide emulsion, its preparation process is as follows:
1) get the raw materials ready:
Monomer mixture 56-150 weight part, emulsifying agent 1.0-2.0 weight part, sodium lauryl sulphate 1.0-2.0 weight part, initiator 0.4-1.0 weight part, sodium bicarbonate 0.3-0.6 weight part, pH regulator agent 1.0-2.5 weight part, defoamer 0.3-0.8 weight part, deionized water 80-100 weight part and nano-oxide slurry 4-10 weight part;
Described nano-oxide slurry is made up of the nano-oxide of 20-40 weight part, the tensio-active agent and the 60-100 weight part of 0.5-2 weight part; Described nano-oxide is Al
2O
3, ZnO and TiO
2In a kind of, two kinds or three kinds;
Described monomer mixture is made up of the methyl methacrylate of 20-45 parts by weight of acrylic methyl esters, 20-40 weight part, the acrylamide and the 15-55 parts by weight of acrylic butyl ester of 1-5 weight part;
And described initiator is divided into two parts, first part is the 60-80% of initiator gross weight;
Second part is the 40-20% of initiator gross weight;
2) preparation nano-oxide slurry:
In the nano-oxide slurry that step 1) is got ready each component in dispersion machine 25 ℃ disperse, afterwards again in sand mill 25 ℃ ground 2 hours, make the nano-oxide slurry;
3) in reactor, add deionized water, emulsifying agent and the sodium lauryl sulphate of step 1), add monomer mixture again and carry out emulsification, emulsification adds described nano-oxide slurry after 1 hour, stir after 30 minutes to heat up;
When 4) being warming up to 75 ± 5 ℃, drip first part of initiator of step 1), dripped off in 1-2 hour;
5) drip first part of initiator after, kept again 10-30 minute, heat up 80 ± 5 ℃, drip second part of initiator again, dripped off in 30-60 minute,
6) drip off second part of initiator after, be warming up to 85 ± 5 ℃, be incubated 1-2 hour;
7) defoamer and the pH regulator agent of adding step 1) stir, and make its pH value be transferred to 8-10, are cooled to below 40 ℃, and discharging obtains composite latex for paints.
Described emulsifying agent is alkylphenol polyoxyethylene or alkylphenol polyoxyethylene ammonium sulfate emulsifying agent; Described initiator is ammonium persulphate or Potassium Persulphate; Described pH regulator agent select in ammoniacal liquor, trolamine and the 2-amino-2-methyl-1-propanol a kind of, two kinds or three kinds; Described defoamer is an organo-siloxane.
Described tensio-active agent is the compound of aniorfic surfactant and nonionogenic tenside.
Water-borne coatings provided by the invention is by coating composite nano oxide emulsion 40-60 weight part, film coalescence aid 12 carbon alcohol ester 2-3 weight parts, wetting agent 0.05-0.1 weight part, thickening material 0.1-0.5 weight part, defoamer 0.1-0.3 weight part, deionized water 10-30 weight part and mineral filler 0-50 weight part; Described mineral filler is made through slurrying and sand milling by water and tensio-active agent;
Described coating is made up of monomer mixture 56-150 weight part, emulsifying agent 1.0-2.0 weight part, sodium lauryl sulphate 1.0-2.0 weight part, initiator 0.4-1.0 weight part, sodium bicarbonate 0.3-0.6 weight part, pH regulator agent 1.0-2.5 weight part, defoamer 0.3-0.8 weight part, deionized water 80-100 weight part and nano-oxide slurry 4-10 weight part with the composite nano oxide emulsion;
Described nano-oxide slurry is disperseed in dispersion machine by the nano-oxide of 20-40 weight part, the tensio-active agent of 0.5-2 weight part and the water of 60-100 weight part, carries out sand milling at sand mill more afterwards and forms; Described nano-oxide is Al
2O
3, ZnO and TiO
2In a kind of, two kinds or three kinds;
Described monomer mixture is made up of the methyl methacrylate of 20-45 parts by weight of acrylic methyl esters, 20-40 weight part, the acrylamide and the 15-55 parts by weight of acrylic butyl ester of 1-5 weight part.
Described wetting agent is selected polyether-modified polysiloxane; Thickening material is the modified polyurethane thickening material; Defoamer is an organo-siloxane.
The preparation method of water-borne coatings provided by the invention, its step is as follows:
1) get the raw materials ready:
Coating composite nano oxide emulsion 40-60 weight part, film coalescence aid 12 carbon alcohol ester 2-3 weight parts, wetting agent 0.05-0.1 weight part, thickening material 0.1-0.5 weight part, defoamer 0.1-0.3 weight part, deionized water 10-30 weight part and mineral filler 0-50 weight part; Described mineral filler is made through slurrying and sand milling by water and tensio-active agent;
Described coating is made up of monomer mixture 56-150 weight part, emulsifying agent 1.0-2.0 weight part, sodium lauryl sulphate 1.0-2.0 weight part, initiator 0.4-1.0 weight part, sodium bicarbonate 0.3-0.6 weight part, pH regulator agent 1.0-2.5 weight part, defoamer 0.3-0.8 weight part, deionized water 80-100 weight part and nano-oxide slurry 4-10 weight part with the composite nano oxide emulsion;
Described nano-oxide slurry is disperseed in dispersion machine by the nano-oxide of 20-40 weight part, the tensio-active agent of 0.5-2 weight part and the water of 60-100 weight part, carries out sand milling at sand mill more afterwards and forms; Described nano-oxide is Al
2O
3, ZnO and TiO
2In a kind of, two kinds or three kinds;
Described monomer mixture is made up of the methyl methacrylate of 20-45 parts by weight of acrylic methyl esters, 20-40 weight part, the acrylamide and the 15-55 parts by weight of acrylic butyl ester of 1-5 weight part;
3) deionized water is added in the paint mixing tank, then successively film coalescence aid, wetting agent, thickening material and defoamer are added in the paint mixing tank, stir; Add coating composite nano oxide emulsion and mineral filler again, after stirring, discharging makes water-borne coatings.
Described wetting agent is polyether-modified polysiloxane BYK-346; Described thickening material is modified polyurethane thickening material PU-85; Described defoamer is organo-siloxane BYK-028.
The composite emulsion and the water-borne coatings of the present invention's preparation have the following advantages:
Emulsion of the present invention is owing to add the nano-oxide slurry of modification in the synthesis phase of preparation process, make it participate in the polyreaction of emulsion, thereby nano material is evenly distributed in emulsion, can not move in the dried coating film process, water-borne coatings stability prepared therefrom significantly strengthens, and stores and can not precipitate more than 6 months.
In addition, significantly improve, therefore have good wear resistance, have good resistance to soiling simultaneously by the water-borne coatings hardness of emulsion preparation of the present invention.
Embodiment
Describe content of the present invention in detail below by specific embodiment.
Embodiment 1
(1) emulsion preparation
According to wall paint emulsion inside and outside the following steps production water-based:
1, get the raw materials ready according to following weight proportion:
Methyl acrylate (MA) 20
Methyl methacrylate (MMA) 20
Diacetone-acryloamide(DAA) (DAAM) 1
Butyl acrylate (BA) 15
Alkylphenol polyoxyethylene ammonium sulfate (R-436) 1.0
Sodium lauryl sulphate (SDS) 1.0
Nano-oxide slurry 4
Sodium bicarbonate (SBC) 0.3
Ammonium persulphate (initiator) 0.4
Deionized water (H
2O) 80
Trolamine (pH regulator agent) 1
BYK-028 (defoamer) 0.3
Wherein the nano-oxide slurry prepares according to following steps:
1) get the raw materials ready according to following weight part proportioning:
Nano-TiO
2: 20; Tensio-active agent: 1.5; Water: 60.
2) prepare the nano-oxide slurry by mechanical milling method, being dispersed into slurry in nano-oxide, water, the tensio-active agent adding dispersion machine, wherein temperature is controlled to be 25 ℃; Slurry is joined in the sand mill again and ground 2 hours, controlled temperature is 25 ℃; Be prepared into the nano-oxide slurry;
3) with step 2) the nano-oxide slurry that obtains applies the ultrasonic wave effect after 2 hours, discharging;
2, in the reactor that agitator, prolong, nitrogen protection and feeding device are housed, add deionized water, emulsifying agent and sodium lauryl sulphate, add methyl acrylate, methyl methacrylate, acrylamide, butyl acrylate again and carry out emulsification, emulsification adds the nano-oxide slurry after 1 hour, stir after 30 minutes to heat up;
When 3, being warming up to 80 ℃, drip first part of initiator, add-on is that 70%, 2 hour of initiator total amount drips off;
4, kept again 20 minutes after dripping initiator, heat up 85 ℃, drip second part of initiator again, for 30%, 50 minute of initiator total amount drips off;
5, drip initiator after, be warming up to 90 ℃, be incubated 1 hour;
6, add defoamer and pH regulator agent, stir, be cooled to below 40 ℃, discharging makes the coating composite nano oxide emulsion of present embodiment.
The coating that is obtained is as follows with the performance index of composite nano oxide emulsion:
Solids content 38.9%
Emulsion particle diameter 200nm
PH value 8
Viscosity (25 ± 0.5 ℃) 300mpa.s
6 months storage periods
(2) water-borne coatings preparation
Produce water-borne coatings according to following steps:
1, get the raw materials ready according to following weight proportion:
12 carbon alcohol esters (film coalescence aid) 3
BYK-346 (wetting agent) 0.1
Deionized water (H
2O) 15.0
PU-85 (thickening material) 0.2
BYK-028 (defoamer) 0.1
Embodiment 1 coating composite nano oxide emulsion 50
Talcum powder (600 order) 25
2, with talcum powder water and tensio-active agent slurrying, standby behind the sand milling.
3, deionized water is added in the paint mixing tank, then film coalescence aid, wetting agent, thickening material and defoamer are added in the paint mixing tank successively, stir; Add made slurry in the composite emulsion and 2, after stirring, discharging makes the water-borne coatings (the inside and outside wall paint product of water-based) of present embodiment.
The product that is obtained can be made the inside and outside wall paint of water-based, and the performance index of product are as follows:
Solids content 47.4%
Viscosity (25 ± 0.5 ℃) 800mpa.s
6 months storage periods
Embodiment 2
(1) emulsion preparation
According to exterior wall emulsion in the following steps production water-based:
1, get the raw materials ready according to following weight proportion:
Methyl acrylate (MA) 25
Methyl methacrylate (MMA) 18
Diacetone-acryloamide(DAA) (DAAM) 2
Butyl acrylate (BA) 55
Alkylphenol polyoxyethylene ammonium sulfate (R-436) 1.2
Sodium lauryl sulphate (SDS) 1.5
Nano-oxide slurry 5
Sodium bicarbonate (SBC) 0.6
Potassium Persulphate (initiator) 0.7
Deionized water (H
2O) 95
2-amino-2-methyl-1-propanol (pH regulator agent) 2.5
BYK-028 (defoamer) 0.3
Wherein the nano-oxide slurry prepares according to following steps:
1) get the raw materials ready according to following weight part proportioning:
Nanometer Al
2O
3: 30; Tensio-active agent: 1.8; Water: 70.
2) prepare the nano-oxide slurry by mechanical milling method, being dispersed into slurry in nano-oxide, water, the tensio-active agent adding dispersion machine, wherein temperature is controlled to be 25 ℃; Slurry is joined in the sand mill again and ground 2 hours, controlled temperature is 25 ℃; Be prepared into the nano-oxide slurry;
3) with step 2) the nano-oxide slurry that obtains applies the ultrasonic wave effect after 2 hours, discharging;
2, in the reactor that agitator, prolong, nitrogen protection and feeding device are housed, add deionized water, emulsifying agent and sodium lauryl sulphate, add methyl acrylate, methyl methacrylate, acrylamide, butyl acrylate again and carry out emulsification, emulsification adds the nano-oxide slurry after 1 hour, stir after 30 minutes to heat up;
When 3, being warming up to 75 ℃, drip first initiator, add-on is that 72%, 80 minute of initiator total amount drips off;
4, kept again 30 minutes after dripping initiator, heat up 80 ℃, drip second batch of initiator again, for 28%, 40 minute of initiator total amount drips off;
5, drip initiator after, be warming up to 88 ℃, be incubated 2 hours;
6, add whole defoamer and pH regulator agent, stir, be cooled to below 40 ℃, discharging makes the coating composite nano oxide emulsion of present embodiment.
The coating that is obtained is as follows with the performance index of composite nano oxide emulsion:
Solids content 48%
Emulsion particle diameter 200nm
PH value 9.5
Viscosity (25 ± 0.5 ℃) 300mpa.s
6 months storage periods
(2) water-borne coatings preparation
Produce water-borne coatings according to following steps:
1, get the raw materials ready according to following weight proportion:
12 carbon alcohol esters (film coalescence aid) 2.5
BYK-346 (wetting agent) 0.06
Deionized water (H
2O) 22.0
PU-85 (thickening material) 0.3
BYK-028 (defoamer) 0.2
The coating of the embodiment of the invention 2 composite nano oxide emulsion 45
Talcum powder (600 order) 30
2, with talcum powder water and tensio-active agent slurrying, standby behind the sand milling.
3, deionized water is added in the paint mixing tank, then film coalescence aid, wetting agent, thickening material and defoamer are added in the paint mixing tank successively, stir; Add made slurry in the composite emulsion and 2, after stirring, discharging makes the water-borne coatings (the inside and outside wall paint product of water-based) of present embodiment.
The inside and outside wall paint of the water-based done that is obtained, the performance index of product are as follows:
Solids content 55%
Viscosity (25 ± 0.5 ℃) 900mpa.s
6 months storage periods
Embodiment 3
(1) emulsion preparation
According to wall paint emulsion inside and outside the following steps production water-based:
1, get the raw materials ready according to following weight proportion:
Methyl acrylate (MA) 40
Methyl methacrylate (MMA) 20
Diacetone-acryloamide(DAA) (DAAM) 5
Butyl acrylate (BA) 35
Alkylphenol polyoxyethylene ammonium sulfate (R-436) 1.8
Sodium lauryl sulphate (SDS) 1.5
Nano-oxide slurry 5
Sodium bicarbonate (SBC) 0.4
Potassium Persulphate (initiator) 0.6
Deionized water (H
2O) 100
Ammoniacal liquor (pH regulator agent) 2.0
BYK-028 (defoamer) 0.6
Wherein the nano-oxide slurry prepares according to following steps:
1) get the raw materials ready according to following weight part proportioning:
Nano-ZnO: 35; Tensio-active agent: 1.8; Water: 80.
2) prepare the nano-oxide slurry by mechanical milling method, being dispersed into slurry in nano-oxide, water, the tensio-active agent adding dispersion machine, wherein temperature is controlled to be 25 ℃; Slurry is joined in the sand mill again and ground 2 hours, controlled temperature is 25 ℃; Be prepared into the nano-oxide slurry;
3) with step 2) the nano-oxide slurry that obtains applies the ultrasonic wave effect after 2 hours, discharging;
2, in the reactor that agitator, prolong, nitrogen protection and feeding device are housed, add deionized water, emulsifying agent and sodium lauryl sulphate, add methyl acrylate, methyl methacrylate, acrylamide, butyl acrylate again and carry out emulsification, emulsification adds the nano-oxide slurry after 1 hour, stir after 30 minutes to heat up;
When 3, being warming up to 78 ℃, drip first part of initiator, add-on is that 75%, 2 hour of initiator total amount drips off;
4, kept again 20 minutes after dripping initiator, heat up 83 ℃, drip second part of initiator again, for 25%, 40 minute of initiator total amount drips off;
5, drip initiator after, be warming up to 90 ℃, be incubated 1 hour;
6, add whole defoamer and pH regulator agent, stir, be cooled to below 40 ℃ discharging.
The performance index of the product emulsion that is obtained are as follows:
Solids content 49%
Emulsion particle diameter 200nm
PH value 9.5
Viscosity (25 ± 0.5 ℃) 400mpa.s
6 months storage periods
(2) water-borne coatings preparation
Produce water-borne coatings according to following steps:
1, get the raw materials ready according to following weight proportion:
12 carbon alcohol esters (film coalescence aid) 3
BYK-346 (wetting agent) 0.08
Deionized water (H
2O) 15.0
PU-85 (thickening material) 0.4
BYK-028 (defoamer) 0.2
The embodiment of the invention 3 emulsions 60
Talcum powder (600 order) 15
2, with talcum powder water and tensio-active agent slurrying, standby behind the sand milling.
3, deionized water is added in the paint mixing tank, then film coalescence aid, wetting agent, thickening material and defoamer are added in the paint mixing tank successively, stir; Add made slurry in the composite emulsion and 2, after stirring, discharging makes the water-borne coatings (the inside and outside wall paint product of water-based) of present embodiment.
The product that is obtained can be made the inside and outside wall paint of water-based, and the performance index of product are as follows:
Solids content 48%
Viscosity (25 ± 0.5 ℃) 1200mpa.s
6 months storage periods
Embodiment 4
(1) emulsion preparation
Produce aqueous wood lacquer latex according to following steps:
1, get the raw materials ready according to following weight proportion:
Methyl acrylate (MA) 23
Methyl methacrylate (MMA) 40
Diacetone-acryloamide(DAA) (DAAM) 2
Butyl acrylate (BA) 35
Alkylphenol polyoxyethylene ammonium sulfate (R-436) 1.8
Sodium lauryl sulphate (SDS) 1.5
Nano-oxide slurry 5
Sodium bicarbonate (SBC) 0.5
Potassium Persulphate (initiator) 0.8
Deionized water (H
2O) 80
Trolamine (pH regulator agent) 1.5
BYK-028 (defoamer) 0.7
Wherein the nano-oxide slurry prepares according to following steps:
1) get the raw materials ready according to following weight part proportioning:
Nano-ZnO, TiO
2Mixture: 40; Tensio-active agent: 2; Water: 100.
2) prepare the nano-oxide slurry by mechanical milling method, being dispersed into slurry in nano-oxide, water, the tensio-active agent adding dispersion machine, wherein temperature is controlled to be 25 ℃; Slurry is joined in the sand mill again and ground 2 hours, controlled temperature is 25 ℃; Be prepared into the nano-oxide slurry;
3) with step 2) the nano-oxide slurry that obtains applies the ultrasonic wave effect after 2 hours, discharging;
2, in the reactor that agitator, prolong, nitrogen protection and feeding device are housed, add deionized water, emulsifying agent and sodium lauryl sulphate, add methyl acrylate, methyl methacrylate, acrylamide, butyl acrylate again and carry out emulsification, emulsification adds the nano-oxide slurry after 1 hour, stir after 30 minutes to heat up;
When 3, being warming up to 75 ℃, drip first initiator, add-on is that 65%, 2 hour of initiator total amount drips off;
4, kept again 30 minutes after dripping initiator, heat up 85 ℃, drip second batch of initiator again, for 35%, 60 minute of initiator total amount drips off;
5, drip initiator after, be warming up to 90 ℃, be incubated 1 hour;
6, add whole defoamer and pH regulator agent, stir, be cooled to below 40 ℃ discharging.
The performance index of the product emulsion that is obtained are as follows:
Solids content 50%
Emulsion particle diameter 200nm
PH value 9
Viscosity (25 ± 0.5 ℃) 350mpa.s
6 months storage periods
(2) water-borne coatings preparation
Produce water-borne coatings according to following steps:
1, get the raw materials ready according to following weight proportion:
12 carbon alcohol esters (film coalescence aid) 2.5
BYK-346 (wetting agent) 0.1
Deionized water (H
2O) 17.0
PU-85 (thickening material) 0.5
BYK-028 (defoamer) 0.1
The embodiment of the invention 4 emulsions 50
Talcum powder (600 order) 0
2, deionized water is added in the paint mixing tank, then film coalescence aid, wetting agent, thickening material and defoamer are added in the paint mixing tank successively, stir; Add composite emulsion, after stirring, discharging makes the water-borne coatings (aqueous woodware paint product) of present embodiment;
The product that is obtained can be made aqueous woodware paint, and the performance index of product are as follows:
Solids content 36%
Viscosity (25 ± 0.5 ℃) 900mpa.s
6 months storage periods.
Claims (10)
1, a kind of coating composite nano oxide emulsion is made up of the monomer mixture of 56-150 weight part, the emulsifying agent of 1.0-2.0 weight part, the sodium lauryl sulphate of 1.0-2.0 weight part, the initiator of 0.4-1.0 weight part, the sodium bicarbonate buffer agent of 0.3-0.6 weight part, the pH regulator agent of 1.0-2.5 weight part, the defoamer of 0.3-0.8 weight part, the deionized water of 80-100 weight part and the nano-oxide slurry of 4-10 weight part;
Described nano-oxide slurry is disperseed in dispersion machine by the nano-oxide of 20-40 weight part, the tensio-active agent of 0.5-2 weight part and the water of 60-100 weight part, carries out sand milling at sand mill more afterwards and forms; Described nano-oxide is Al
2O
3, ZnO and TiO
2In a kind of, two kinds or three kinds;
Described monomer mixture is made up of the methyl methacrylate of 20-45 parts by weight of acrylic methyl esters, 20-40 weight part, the acrylamide and the 15-55 parts by weight of acrylic butyl ester of 1-5 weight part.
2, by the described coating of claim 1 composite nano oxide emulsion, it is characterized in that described emulsifying agent is alkylphenol polyoxyethylene or alkylphenol polyoxyethylene ammonium sulfate emulsifying agent; Described initiator is ammonium persulphate or Potassium Persulphate; Described pH regulator agent select in ammoniacal liquor, trolamine and the 2-amino-2-methyl-1-propanol a kind of, two kinds or three kinds; Described defoamer is silicone antifoam agent BYK-028.
3, by the described coating of claim 1 composite nano oxide emulsion, it is characterized in that: described tensio-active agent is the compound of aniorfic surfactant and nonionogenic tenside.
4, the described coating of a kind of claim 1 preparation method of composite nano oxide emulsion, its preparation process is as follows:
1) get the raw materials ready:
Monomer mixture 56-150 weight part, emulsifying agent 1.0-2.0 weight part, sodium lauryl sulphate 1.0-2.0 weight part, initiator 0.4-1.0 weight part, sodium bicarbonate 0.3-0.6 weight part, pH regulator agent 1.0-2.5 weight part, defoamer 0.3-0.8 weight part, deionized water 80-100 weight part and nano-oxide slurry 4-10 weight part;
Described nano-oxide slurry is made up of the nano-oxide of 20-40 weight part, the tensio-active agent and the 60-100 weight part of 0.5-2 weight part; Described nano-oxide is Al
2O
3, ZnO and TiO
2In a kind of, two kinds or three kinds;
Described monomer mixture is made up of the methyl methacrylate of 20-45 parts by weight of acrylic methyl esters, 20-40 weight part, the acrylamide and the 15-55 parts by weight of acrylic butyl ester of 1-5 weight part;
And described initiator is divided into two parts, first part is the 60-80% of initiator gross weight;
Second part is the 20-40% of initiator gross weight;
2) preparation nano-oxide slurry:
In the nano-oxide slurry that step 1) is got ready each component in dispersion machine 25 ℃ disperse, afterwards in sand mill 25 ℃ ground 2 hours, ultrasonic again 4 hours, make the nano-oxide slurry;
3) in reactor, add deionized water, emulsifying agent and the sodium lauryl sulphate of step 1), add monomer mixture again and carry out emulsification, emulsification adds described nano-oxide slurry after 1 hour, stir after 30 minutes to heat up;
When 4) being warming up to 75 ± 5 ℃, drip first part of initiator of step 1), dripped off in 1-2 hour;
5) drip first part of initiator after, kept again 10-30 minute, heat up 80 ± 5 ℃, drip second part of initiator again, dripped off in 30-60 minute,
6) drip off second part of initiator after, be warming up to 85 ± 5 ℃, be incubated 1-2 hour;
7) defoamer and the pH regulator agent of adding step 1) stir, and make its pH value be transferred to 8-10, are cooled to below 40 ℃, and discharging obtains composite latex for paints.
5, coating as claimed in claim 4 is characterized in that with the preparation method of composite nano oxide emulsion described emulsifying agent is alkylphenol polyoxyethylene or alkylphenol polyoxyethylene ammonium sulfate emulsifying agent; Described initiator is ammonium persulphate or Potassium Persulphate; Described pH regulator agent select in ammoniacal liquor, trolamine and the 2-amino-2-methyl-1-propanol a kind of, two kinds or three kinds; Described defoamer is silicone antifoam agent BYK-028.
6, coating as claimed in claim 4 is characterized in that with the preparation method of composite nano oxide emulsion described tensio-active agent is the compound of aniorfic surfactant and nonionogenic tenside.
7, a kind of water-borne coatings, it is characterized in that, by coating composite nano oxide emulsion 40-60 weight part, film coalescence aid 12 carbon alcohol ester 2-3 weight parts, wetting agent 0.05-0.1 weight part, thickening material 0.1-0.5 weight part, defoamer 0.1-0.3 weight part, deionized water 10-30 weight part and mineral filler 0-50 weight part; Described mineral filler is made through slurrying and sand milling by water and tensio-active agent;
Described coating is made up of monomer mixture 56-150 weight part, emulsifying agent 1.0-2.0 weight part, sodium lauryl sulphate 1.0-2.0 weight part, initiator 0.4-1.0 weight part, sodium bicarbonate 0.3-0.6 weight part, pH regulator agent 1.0-2.5 weight part, defoamer 0.3-0.8 weight part, deionized water 80-100 weight part and nano-oxide slurry 4-10 weight part with the composite nano oxide emulsion;
Described nano-oxide slurry is disperseed in dispersion machine by the nano-oxide of 20-40 weight part, the tensio-active agent of 0.5-2 weight part and the water of 60-100 weight part, carries out sand milling at sand mill more afterwards and forms; Described nano-oxide is Al
2O
3, ZnO and TiO
2In a kind of, two kinds or three kinds;
Described monomer mixture is made up of the methyl methacrylate of 20-45 parts by weight of acrylic methyl esters, 20-40 weight part, the acrylamide and the 15-55 parts by weight of acrylic butyl ester of 1-5 weight part.
8, water-borne coatings as claimed in claim 7 is characterized in that, described wetting agent is polyether-modified polysiloxane BYK-346; Described thickening material is modified polyurethane thickening material PU-85; Described defoamer is organo-siloxane BYK-028.
9, the preparation method of the described water-borne coatings of a kind of claim 7, its step is as follows:
1) get the raw materials ready:
Coating composite nano oxide emulsion 40-60 weight part, film coalescence aid 12 carbon alcohol ester 2-3 weight parts, wetting agent 0.05-0.1 weight part, thickening material 0.2-0.5 weight part, defoamer 0.1-0.3 weight part, deionized water 10-30 weight part and mineral filler 0-50 weight part; Described mineral filler is made through slurrying and sand milling by water and tensio-active agent;
Described coating is made up of monomer mixture 56-150 weight part, emulsifying agent 1.0-2.0 weight part, sodium lauryl sulphate 1.0-2.0 weight part, initiator 0.4-1.0 weight part, sodium bicarbonate 0.3-0.6 weight part, pH regulator agent 1.0-2.5 weight part, defoamer 0.3-0.8 weight part, deionized water 80-100 weight part and nano-oxide slurry 4-10 weight part with the composite nano oxide emulsion;
Described nano-oxide slurry is disperseed in dispersion machine by the nano-oxide of 20-40 weight part, the tensio-active agent of 0.5-2 weight part and the water of 60-100 weight part, carries out sand milling at sand mill more afterwards and forms; Described nano-oxide is Al
2O
3, ZnO and TiO
2In a kind of, two kinds or three kinds;
Described monomer mixture is made up of the methyl methacrylate of 20-45 parts by weight of acrylic methyl esters, 20-40 weight part, the acrylamide and the 15-55 parts by weight of acrylic butyl ester of 1-5 weight part;
3) deionized water is added in the paint mixing tank, then successively film coalescence aid, wetting agent, thickening material and defoamer are added in the paint mixing tank, stir; Add coating composite nano oxide emulsion and mineral filler again, after stirring, discharging makes water-borne coatings.
10, the preparation method of water-borne coatings as claimed in claim 9 is characterized in that, described wetting agent is polyether-modified polysiloxane BYK-346; Described thickening material is modified polyurethane thickening material PU-85; Described defoamer is organo-siloxane BYK-028.
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| CN200810104605XA CN101565570B (en) | 2008-04-22 | 2008-04-22 | Composite latex for paints, water paint and preparation method of water paint |
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| CN200810104605XA CN101565570B (en) | 2008-04-22 | 2008-04-22 | Composite latex for paints, water paint and preparation method of water paint |
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| CN101565570A true CN101565570A (en) | 2009-10-28 |
| CN101565570B CN101565570B (en) | 2011-11-09 |
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