Summary of the invention
The invention provides on a kind of plastic cement with nano-silicon dioxide modified can recoat UV gloss oil and preparation method, directly do over again, without bottoming.
To achieve these goals, the invention provides following technical scheme:
On plastic cement with nano-silicon dioxide modified can a recoat UV gloss oil, it comprises:
Six functional acrylic urethane UV resins 5 ~ 10%; Trifunctional acroleic acid polyurethane UV resin 10 ~ 15%; Two functional group acroleic acid polyurethane UV resins 15 ~ 20%; Trifunctional monomer 10 ~ 15%; Two monomers 15 ~ 20%; Thermoplastic acrylic resin 10 ~ 15%; Fluorin modified crylic acid ester flow agent 2 ~ 2.5%; Light trigger 3 ~ 3.5%; Nanometer titanium dioxide silicon additive 0.5 ~ 1%; Methylethylketone 5 ~ 6%.
The present invention also provide on a kind of above-mentioned plastic cement with nano-silicon dioxide modified can recoat UV gloss oil preparation method, it is characterized in that, comprise step:
First by six functional acrylic urethane UV resins and trifunctional acroleic acid polyurethane UV resin and two functional acrylic urethane UV resins, drop in stirrer, drop into the pre-dispersed work in-process of nanometer titanium dioxide silicon additive again, stir 10 ~ 15 minutes under the speed of 1200 ~ 1500 revs/min, to stirring, drop into trifunctional monomer and two monomers again, then stir 10 ~ 15 minutes under the speed of 1200 ~ 1500 revs/min, to stirring, reduce rotating speed to 800 rev/min again, add thermoplastic acrylic resin, fluorin modified crylic acid ester flow agent, stir 5 minutes to even, finally add in advance with the light trigger that methylethylketone dissolves, 5 minutes are stirred to even by the speed of 800 revs/min.Stop stirring, pack by 500 order filter screen filtration after the assay was approved.
By implementing above technical scheme, there is following technique effect: on plastic cement provided by the invention with nano-silicon dioxide modified can recoat UV gloss oil, six official's resin contents can be reduced, make full use of the lower shrinkage of trifunctional acroleic acid polyurethane UV resin and two functional acrylic urethane UV resins, high adhesive force, snappiness, low cross-linking characteristic, improve the adherence of interlayer recoat, cancel the silicone based flow agents such as conventional BYK333, use fluorin modified crylic acid ester flow agent instead, eliminate the impact that recoat that silicone based flow agent brings is bad, utilize the high transparent of nano silicon, high surface, high voidage, high fillibility, high-wearing feature, reduce film shrinkability, improve hardness of film and resistance to marring, and provide crosslinked group for recoat, utilize the low viscosity of trifunctional monomer and two monomers, rapid reaction characteristic, improve film fullness ratio, setting rate, utilize the not bridging property of thermoplastic acrylic resin, recoat is provided to adhere to, and select low viscosity, low-molecular-weight UV bottom paint resin, low viscosity lower molecular weight provides levelling gloss, fullness ratio, UV bottom paint resin character provides the sticking power of UV recoat.When not reducing hardness, need not spray conventional water of doing over again, spraying of can directly doing over again, decreases production process, improves the yield of finished product.
Embodiment
Technical scheme for a better understanding of the present invention, is described below in detail embodiment provided by the invention.
The embodiment of the present invention provide on a kind of plastic cement with nano-silicon dioxide modified can recoat UV gloss oil, it is characterized in that, comprising:
Six functional acrylic urethane UV resins 5 ~ 10%; Trifunctional acroleic acid polyurethane UV resin 10 ~ 15%; Two functional group acroleic acid polyurethane UV resins 15 ~ 20%; Trifunctional monomer 10 ~ 15%; Two monomers 15 ~ 20%; Thermoplastic acrylic resin 10 ~ 15%, fluorin modified crylic acid ester flow agent 2 ~ 2.5%; Light trigger 3 ~ 3.5%; Nanometer titanium dioxide silicon additive 0.5 ~ 1%; Methylethylketone 5 ~ 6%.This six functional acrylics urethane UV resin is aliphatic polyurethane six acrylate, trifunctional acroleic acid polyurethane UV resin is aliphatic polyurethane triacrylate, two functional group's acroleic acid polyurethane UV resins are aliphatic urethane diacrylate, and this trifunctional monomer is: TMPTA (Viscoat 295); This two monomer is: HDDA (1,6 hexanediol diacrylate); Light trigger is 1-hydroxy-cyciohexyl benzophenone; Nanometer titanium dioxide silicon additive is: aerosil, and thermoplastic acrylic resin is the low viscous UV bottom paint resin of small-molecular-weight; Fluorin modified crylic acid ester flow agent is: fluorine richness polyacrylic ester.
Embodiment 1: six functional acrylic urethane UV resin 5%; Trifunctional acroleic acid polyurethane UV resin 15%; Two functional group acroleic acid polyurethane UV resins 20%; Trifunctional monomer 15%; Two monomers 20%; Thermoplastic acrylic resin 13.5% fluorin modified crylic acid ester flow agent 2%; Light trigger 3%; Nanometer titanium dioxide silicon additive 0.5%; Methylethylketone 6%.
Embodiment 2: six functional acrylic urethane UV resin 7.5%; Trifunctional acroleic acid polyurethane UV resin 15%; Two functional group acroleic acid polyurethane UV resins 20%; Trifunctional monomer 15%; Two monomers 20%; Thermoplastic acrylic resin 10%; Fluorin modified crylic acid ester flow agent 2.5%; Light trigger 3.5%; Nanometer titanium dioxide silicon additive 0.5%; Methylethylketone 6%.
Embodiment 3: six functional acrylic urethane UV resin 10%; Trifunctional acroleic acid polyurethane UV resin 10%; Two functional group acroleic acid polyurethane UV resins 20%; Trifunctional monomer 15%; Two monomers 19%; Thermoplastic acrylic resin 15%; Fluorin modified crylic acid ester flow agent 2%; Light trigger 3%; Nanometer titanium dioxide silicon additive 1%; Methylethylketone 5%.
Above three formulas all have good recoatability.
On this plastic cement with nano-silicon dioxide modified can recoat UV gloss oil preparation method:
First by six functional acrylic urethane UV resins and trifunctional acroleic acid polyurethane UV resin and two functional acrylic urethane UV resins, drop in stirrer, drop into the pre-dispersed work in-process of nanometer titanium dioxide silicon additive again, stir 10 ~ 15 minutes under the speed of 1200 ~ 1500 revs/min, to stirring, drop into trifunctional monomer and two monomers again, then stir 10 ~ 15 minutes under the speed of 1200 ~ 1500 revs/min, to stirring, reduce rotating speed to 800 rev/min again, add thermoplastic acrylic resin, fluorin modified crylic acid ester flow agent, stir 5 minutes to even, finally add in advance with the light trigger that methylethylketone dissolves, 5 minutes are stirred to even by the speed of 800 revs/min, stop stirring, pack by 500 order filter screen filtration after the assay was approved.In the present embodiment, after adding light trigger, palpus lucifuge, prevents from seeing that light local produces slight curing cross-linked, causes quality problems.
In the above-described embodiments, nanometer titanium dioxide silicon additive is carried out pre-dispersed, due to nanometer titanium dioxide silicon additive high surface, high voidage, can not play a role by General Decentralized method, we adopt two monomers 15% and nanometer titanium dioxide silicon additive 1% in formula to stir 20 ~ 30 minutes under the condition of high speed 3000 revs/min, , find through experiment, when rotating speed is below 3000 revs/min, nanometer titanium dioxide silicon additive can not well disperse, more than 3000 revs/min, the two just can must be made to mix completely, abundant dispersion, then grind 3 ~ 4 times on three-roller, reach below 10um to fineness just can use, nanometer titanium dioxide silicon additive is made to reach nano-scale dispersion state, give full play to the special-effect of nanometer titanium dioxide silicon additive under nano level: high transparent, high surface, high voidage, high fillibility, high-wearing feature.
In the above-described embodiments, because general UV gloss oil all adopts organosilicon flow agent, as BYK333 etc., effective, dosage is few, generally adds 0.5% and just can reach good levelling effect, but exist can not the shortcoming of recoat.And with the flow agent of common non-organic silicon class, can not reach and be satisfied with levelling effect, screen by experiment, levelling problem can be solved with a kind of special fluorin modified crylic acid ester flow agent, dosage needs more than 2%, and cost comparatively organosilicon flow agent is slightly high, but on recoat without impact.
In the above-described embodiments, six official's resins and trifunctional acroleic acid polyurethane UV resin and two functional acrylic urethane UV resins, three official's monomers, the rational proportion of two official's monomers, six official's resin ratio are too high, during solidification, cross-linking density is too high, hardness is too high, and recoat effect is bad, and six official's resin ratio are too low, during solidification, cross-linking density is too low, and hardness is inadequate; Trifunctional acroleic acid polyurethane UV resin and two functional acrylic urethane UV resins have low viscosity, lower shrinkage, and snappiness is good, high adhesive force, high fullness ratio, intermediate density crosslinking feature, can improve the adherence of interlayer recoat, three officials, two official's monomers reduce system viscosity, improve rate of crosslinking, hardness of film, at the bottom of UV, thermoplastic acrylic resin provides recoatability, through test of many times, when aforementioned proportion, there is rational over-all properties, and do not affect recoatability.
To sum up, 5 ~ 10% are down to by conventional 20 ~ 25% by reducing by six official's resin contents, make full use of the lower shrinkage of trifunctional acroleic acid polyurethane UV resin and two functional acrylic urethane UV resins, high adhesive force, snappiness, low cross-linking characteristic, improve the adherence of interlayer recoat, cancel the silicone based flow agents such as conventional BYK333, select fluorin modified crylic acid ester flow agent, eliminate the impact that recoat that silicone based flow agent brings is bad, utilize the high transparent of nano silicon, high surface, high voidage, high fillibility, high-wearing feature, reduce film shrinkability, improve hardness of film and resistance to marring, and provide crosslinked group for recoat, utilize trifunctional monomer and two monomer's rapid reaction characteristics, improve film setting rate, thermoplastic acrylic resin at the bottom of UV is utilized to provide recoatability, reach the UV gloss oil that recoat is effective.
A kind of the plastic cement above embodiment of the present invention provided can recoat UV gloss oil and preparation method be described in detail with nano-silicon dioxide modified, for one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.