Summary of the invention:
The invention provides a kind of preparation method of lightfast coating material, technical problem to be solved is, gives that coating absorbs and the function of uv reflectance, ageing-resistant, the mechanical property of raising coating, and this finishing agent can be used on coating and adhesive area.
The present invention has adopted following technical scheme.
A kind of preparation method of lightfast coating material is characterized in that: it is made via following steps:
(1) rutile titanium dioxide emulsion preparation: dispersion agent is water-soluble, add nano titanium oxide again, then under ultrasonic cell disruptor power 100W-1000W, ultrasonic time 2-60 minute;
(2) use the emulsification pretreatment machine under 200-11000r/min, emulsification 10-60 minute, make titanium dioxide water-dispersion emulsion;
(3) under 40-80 ℃ of condition, the acrylic resin monomer is joined in the titanium dioxide water-dispersion emulsion, be warming up to 80-90 ℃ then, add initiator, reaction 1-4 hour promptly gets lightfast coating material;
Each amounts of components is: rutile titanium dioxide water-dispersion emulsion weight 40%-69.5%, acrylic resin monomer weight 30%-59.5%, initiator weight 0.2%-0.5%;
Wherein, in (1) step: the median size of rutile titanium dioxide primary particle is 50-100nm, and consumption is 0.5%-10%, dispersion agent 0.1%-5%, and surplus is a water;
Wherein, the acrylic resin monomer is a methyl acrylate, ethyl propenoate, n-butyl acrylate, sec-butyl acrylate, isobutyl acrylate, the vinylformic acid n-propyl, isopropyl acrylate, vinylformic acid 2-ethyl butyl ester, Isooctyl acrylate monomer, dodecylacrylate, vinylformic acid 2-ethoxy ethyl ester, methyl methacrylate, Jia Jibingxisuanyizhi, butyl methacrylate, n propyl methacrylate, isopropyl methacrylate, methacrylic acid 2-hydroxyl ethyl ester, methacrylic acid 2-hydroxypropyl acrylate, acrylamide, vinylformic acid, sodium acrylate, vinyl cyanide, methacrylic acid, sodium methacrylate, vinyl alcohol, vinylchlorid, vinyl acetate, vinylbenzene, chloroprene, the cis divinyl, trans divinyl, in the isoprene one or more are pressed arbitrary proportion and are mixed.
The median size of rutile titanium dioxide primary particle is 50-100nm, adopts electrostatic stabilization and sterically hindered mechanism type dispersion agent to make the powder dispersion system stable.
Ultrasonic cell disruptor power is 100W-1000W, is lower than 100W and can causes the powder depolymerization insufficient, is higher than 1000W and can causes secondary agglomeration; Ultrasonic time 2-60 minute, be lower than 2 minutes and can cause depolymerization insufficient, be higher than 60 minutes and can cause solvent to volatilize in a large number; Emulsification pretreatment machine rotating speed is 200-11000r/min, is lower than 200r/min and can causes disperseing instability, and being higher than 11000r/min stability increases DeGrain.
Compared with the prior art the present invention has following positively effect: (1) rutile type nano titanic oxide can significantly absorb and shield the ultraviolet ray of certain wavelength period, can significantly improve the photostabilization of finishing agent with its modification finishing agent, and marketable value is high.(2) adopt ultra-sonic dispersion and emulsification pretreatment, earlier powder is made emulsion, can make powder depolymerization in water, dispersion, stable.(3) adopt the soap-free polymerization method, emulsion particle stability is high, and the particle diameter of particle is narrow, and monodispersity is good, and the finished surface that makes does not contain remaining emulsifying agent, has improved the water tolerance of coating, meets the development trend of green coating.
Embodiment:
Further specify the present invention below in conjunction with specific embodiment.
Embodiment one
The raw material of lightfast coating material is made of in proportion following component, rutile titanium dioxide water-dispersion emulsion weight 40%, acrylic resin monomer weight 59.5%, initiator weight 0.5%;
Wherein, the rutile titanium dioxide emulsion is formed: the median size of rutile titanium dioxide primary particle is 50-100nm, and consumption is 0.5%, dispersion agent 0.1%, and surplus is a water.
Initiator is lauroyl peroxide, Potassium Persulphate, ammonium persulphate, two (the 2-benzene oxygen ethyl) esters of peroxy dicarbonate, 2,2'-Azobis(2,4-dimethylvaleronitrile), the peroxidation trimethylacetic acid tert-butyl ester, peroxidation carbonic acid diisopropyl ester, di-cyclohexylperoxy dicarbonate, two (2-ethyl) the own esters of peroxy dicarbonate, α, γ-propane dihydroxy acid, 2,2-two
P-methoxy-phenyl ethyl ketone, 2,2-dimethoxy-1, any one in the 2-phenylbenzene ethyl ketone.Following examples together.
Dispersion agent is that in Sodium hexametaphosphate 99, Sodium dodecylbenzene sulfonate, polyoxyethylene glycol, polyacrylamide, sodium polyacrylate, trolamine, Xylo-Mucine, polyvinyl alcohol, sodium polyphosphate, the water glass one or more mix by arbitrary proportion.Following examples together.
The acrylic resin monomer is a methyl acrylate, ethyl propenoate, n-butyl acrylate, sec-butyl acrylate, isobutyl acrylate, the vinylformic acid n-propyl, isopropyl acrylate, vinylformic acid 2-ethyl butyl ester, Isooctyl acrylate monomer, dodecylacrylate, vinylformic acid 2-ethoxy ethyl ester, methyl methacrylate, Jia Jibingxisuanyizhi, butyl methacrylate, n propyl methacrylate, isopropyl methacrylate, methacrylic acid 2-hydroxyl ethyl ester, methacrylic acid 2-hydroxypropyl acrylate, acrylamide, vinylformic acid, sodium acrylate, vinyl cyanide, methacrylic acid, sodium methacrylate, vinyl alcohol, vinylchlorid, vinyl acetate, vinylbenzene, chloroprene, divinyl (cis), divinyl (trans), in the isoprene one or more are pressed arbitrary proportion and are mixed.Following examples together.
The preparation method of this lightfast coating material, via following steps:
(1) rutile titanium dioxide emulsion preparation: dispersion agent is water-soluble, add nano titanium oxide again, then under ultrasonic cell disruptor power 100W, ultrasonic time 60 minutes;
(2) use the emulsification pretreatment machine under 200r/min, emulsification 60 minutes makes titanium dioxide water-dispersion emulsion;
(3) under 40 ℃ of conditions, the acrylic resin monomer is joined in the titanium dioxide water-dispersion emulsion, be warming up to 85 ℃ then, add initiator, reacted 1 hour, promptly get lightfast coating material.
Embodiment two
The raw material of lightfast coating material is made of in proportion following component, rutile titanium dioxide water-dispersion emulsion weight 54%, acrylic resin monomer weight 45.7%, initiator weight 0.3%;
Wherein, the rutile titanium dioxide emulsion is formed: the median size of rutile titanium dioxide primary particle is 50-100nm, and consumption is 5%, dispersion agent 3%, and surplus is a water.
The preparation method of this lightfast coating material, via following steps:
(1) rutile titanium dioxide emulsion preparation: dispersion agent is water-soluble, add nano titanium oxide again, then under ultrasonic cell disruptor power 500W, ultrasonic time 30 minutes;
(2) use the emulsification pretreatment machine under 6000r/min, emulsification 35 minutes makes titanium dioxide water-dispersion emulsion;
(3) under 60 ℃ of conditions, the acrylic resin monomer is joined in the titanium dioxide water-dispersion emulsion, be warming up to 90 ℃ then, add initiator, reacted 3 hours, promptly get lightfast coating material.
Embodiment three
The raw material of lightfast coating material is made of in proportion following component, rutile titanium dioxide water-dispersion emulsion weight 69.5%, acrylic resin monomer weight 30.3%, initiator weight 0.2%;
Wherein, the rutile titanium dioxide emulsion is formed: the median size of rutile titanium dioxide primary particle is 50-100nm, and consumption is 10%, dispersion agent 5%, and surplus is a water.
The preparation method of this lightfast coating material, via following steps:
(1) rutile titanium dioxide emulsion preparation: dispersion agent is water-soluble, add nano titanium oxide again, then under ultrasonic cell disruptor power 1000W, ultrasonic time 2 minutes;
(2) use the emulsification pretreatment machine under 11000r/min, emulsification 10 minutes makes titanium dioxide water-dispersion emulsion;
(3) under 40-80 ℃ of condition, the acrylic resin monomer is joined in the titanium dioxide water-dispersion emulsion, be warming up to 80-90 ℃ then, add initiator, reacted 4 hours, promptly get lightfast coating material.