Background technology
Generally speaking, ultraviolet ray general reference wavelength is between the hertzian wave of 100nm to 400nm.No matter ultraviolet ray is that people, environment or material are all had many adverse influences, if for example human body tans by the sun too much ultraviolet ray, is easy to generate cataract, skin carcinoma, burns and symptom such as thickization of skin; Yellow and embrittlement situation if then take place through the long-time irradiation of ultraviolet ray in material easily.Therefore people constantly seek strong and effective ultraviolet absorption material for many years, as UV light absorber, but UV light absorber is an organic substance, has short, shortcoming such as toxicity is big of life-span, for improving above-mentioned shortcoming, progressively development uses the nano grade inorganic particulate to replace UV light absorber recently.
Though inorganic particles can overcome the shortcoming of UV light absorber, stronger than UV light absorber again to ultraviolet receptivity, but inorganic particles mostly is powder or sol-gel (sol-gel), be difficult for coating on the base material, thus need to add joint compound (binder), but general joint compound, its weathering resistance is not good, therefore the coating that uses inorganic particles to make, after oxidation, degraded, phenomenon such as cause film aging, efflorescence easily, split even come off.
This case the contriver find through broad research, inorganic particles is added fluoroplast, neither change the ultraviolet characteristic of the high absorption of inorganic particles, can utilize the high bond energy of C-F key in the fluoroplast again, improve weathering resistance, and fluoroplast has pollution resistance, can produce self-cleaning effect, so can effectively solve its shortcoming.
Summary of the invention
Main purpose of the present invention is to provide a kind of composition of tool ultraviolet absorption ability, comprises inorganic particles and fluoroplast.The present composition can be prepared into coating, is coated on the base material, so that the base material through applying reaches anti-UV effect, and has good weathering resistance.
The present invention relates to a kind of composition of tool ultraviolet absorption ability, comprise inorganic particles and fluoroplast.
Aforesaid composition, wherein this inorganic particles is selected from by zinc oxide, silicon-dioxide, titanium dioxide, aluminum oxide, calcium sulfate, barium sulfate and lime carbonate and composition thereof.
Aforesaid composition, wherein the particle diameter of this inorganic particles is 1~100 nanometer.
Aforesaid composition, wherein the particle diameter of this inorganic particles is 20~50 nanometers.
Aforesaid composition, wherein this fluoroplast comprises fluoroolefin monomers and the monomeric multipolymer of alkyl vinyl ether.
Aforesaid composition, wherein this fluoroolefin monomers is selected from by a vinyl fluoride, vinylidene fluoride, trifluorochloroethylene, tetrafluoroethylene and R 1216 and composition thereof.
Aforesaid composition, wherein this fluoroolefin monomers is a trifluorochloroethylene.
Aforesaid composition, wherein this alkyl vinyl ether monomer is selected from by straight chain shape alkyl vinyl ether monomer, side chain shape alkyl vinyl ether monomer, cyclic alkyl vinyl ether monomers and hydroxyalkyl vinyl ether monomers and composition thereof.
Aforesaid composition, wherein the carbon number of this alkyl is C
2~C
11
The invention still further relates to a kind of coating of coating substrate surface, comprise aforesaid composition.
Embodiment
The invention provides a kind of composition of tool ultraviolet absorption ability, comprise inorganic particles and fluoroplast.
The employed inorganic particles of the present composition there is no particular restriction, is to be used for absorbing ultraviolet ray, and it is such as but not limited to zinc oxide, silicon-dioxide, titanium dioxide, aluminum oxide, calcium sulfate, barium sulfate, lime carbonate or its mixture.The size of above-mentioned inorganic particles is generally 1~100 nanometer (nano meter), is preferably 20~50 nanometers.
Inorganic particles content in the resin combination of the present invention with general composition weight meter, is 0.01~20 weight %, is preferably 1~5 weight %.
Can be used for the fluoroplast of the present composition, there is no particular restriction, for being familiar with the personage institute well known of this technology, it is preferably the multipolymer that is formed by fluoroolefin monomers and alkyl vinyl ether monomer polymerization, is more preferred from the trifluorochloroethylene tetrapolymer.
The present invention can be used for forming the fluoroolefin monomers of fluoroplast, for being familiar with the personage institute well known of this technology, it is preferably trifluorochloroethylene such as but not limited to a vinyl fluoride, vinylidene fluoride, trifluorochloroethylene, tetrafluoroethylene, R 1216 or its mixture.
The present invention is used to form the alkyl vinyl ether monomer of fluoroplast, there is no particular restriction, group that its optional free straight chain shape alkyl vinyl ether monomer, side chain shape alkyl vinyl ether monomer, cyclic alkyl vinyl ether monomers and hydroxyalkyl vinyl ether monomers and composition thereof constitute.Preferably, the alkyl cording in this alkyl vinyl ether has C
2~C
11Carbon number.
Fluoroplast content in the resin combination of the present invention with general composition weight meter, is 99.99~70 weight %, is preferably 99~90 weight %.
The present composition can optionally add solidifying agent (Curing Agent), and it act as and can produce molecule and intermolecular Chemical bond with joint compound, forms crosslinked (Crosslinking).Solidifying agent used herein is for haveing the knack of the personage institute well known of this technology, for example polymeric polyisocyanate (Polyisocyanate).
Curing agent content in the resin combination of the present invention with general composition weight meter, is 0~20 weight %, is preferably 5~10 weight %.
The present composition optionally can add has the knack of this technology personage additive known, make coating, and be applied to any suitable substrates surface, for example metal, polymeric membrane, plastics, rubber, woodenware, leather or stone material etc., can make substrate surface have the ultraviolet effect of absorption, and good weathering resistance is arranged.
Embodiment
Following examples will the present invention is described further, is not in order to limiting the scope of the invention, and anyly is familiar with the technology of the present invention field person, without prejudice to spirit of the present invention following modification of being reached and variation, all belongs to the present invention's scope.
Embodiment 1
[eterflon 4101 with 126.6 gram fluoroplasts, Eternal provides] (solid about 60%), add each 45 gram of methylethylketone/toluene, stir together (rotating speed 1000rpm), add 35nm earth silicon/titanic oxide/barium sulfate totally 3 grams, solidifying agent [desmodur3390 more in regular turn, Bayer provides] 18.4 grams, form 250.0 gram coating (solid 40%), coating is coated on UX-150 (Teijin provides) base material, can get filming of 10 μ m after the drying, leave standstill and do weather resistance test (utilizing QUV weather resistance test machine, Q-panel company) after 7 days.Test gained result as shown in the following Table 1.
Embodiment 2
Repeat the step of embodiment 1, just 35nm earth silicon/titanic oxide/barium sulfate is changed into 1 gram.Test gained result as shown in the following Table 1.
Embodiment 3
Repeat the step of embodiment 1, just change fluoroplast into acryl resin [eterac7362-TS-28, Eternal provides].Test gained result as shown in the following Table 1.
Embodiment 4
Repeat the step of embodiment 1, just 35nm earth silicon/titanic oxide/barium sulfate is changed into 1 gram and change fluoroplast into acryl resin [eterac 7362-TS-28, Eternal provides].Test gained result as shown in the following Table 1.
Embodiment 5
Repeat the step of embodiment 1, just change 35nm earth silicon/titanic oxide/barium sulfate into UV light absorber [Tinuvin 1130, and Ciba provides].Test gained result as shown in the following Table 1.
The weather-proof accelerated test of table 1:QUV, along with different exposure time, its yellow index (Yellowing index, YI) Zhi variation
| Exposure 20hr Δ YI | Exposure 40hr Δ YI | Exposure 110hr Δ YI | Exposure 130hr Δ YI | Exposure 150hr Δ YI |
Embodiment 1. | ??0.5 | ??0.5 | ??0.9 | ??0.9 | ??0.9 |
Embodiment 2. | ??0.9 | ??1.2 | ??2.7 | ??2.6 | ??2.6 |
Embodiment 3. | ??0.4 | ??0.8 | ??1.9 | ??1.9 | ??2.0 |
Embodiment 4. | ??1.6 | ??2.2 | ??3.7 | ??4.8 | ??4.7 |
Embodiment 5. | ??1.8 | ??2.3 | ??3.5 | ??4.5 | ??4.8 |
Comparative example 1 and 3 and the result of example 2 and 4 as can be known, adding fluoroplast in the inorganic particles is good than general resin on the effect of anti-yellow.
2. comparative example 1 and 5 result use inorganic particulate than organic uv absorbers as can be known, be good on the effect of anti-yellow, therefore learn inorganic particulate to ultraviolet receptivity than organic uv absorbers for by force.