A kind of ultraviolet-curing paint
Technical field
The present invention relates to a kind of ultraviolet-curing paint, specifically be meant a kind of ultraviolet-curing paint (common name mobile phone UV coating) that is used for mobile phone (hereinafter to be referred as mobile phone).
Background technology
Ultraviolet-curing paint has been widely used on the decoration and protection of phone housing with performances such as its good wear resistance, weathering resistance, strong anti-chemical and high rigidity, and energy-efficient, pollution-free.But for a long time, the technology of this product and product are offshore company and monopolize, and price is high always, and along with the develop rapidly and the relevant requirement that reduces production costs of China's mobile phone industry, the price of the UV coating that it is used just becomes the key point of its development of restriction day by day.Mobile phone UV coating is generally by the monomer of multiple functionality (carbon-to-carbon double bond DB/mol) and prepolymer, auxiliary agent, light trigger and the mixed with little amount solvent composition of multiple functionality, also need consider the gradient design of functionality simultaneously, to satisfy over-all propertieies such as the desired high-wearing feature of mobile phone coating, hardness and snappiness.Its product generally has two kinds of forms: gloss oil and mute oil.The application of UV oil on mobile phone mainly takes repeatedly spraying method to reach decorative effect, and the overwhelming majority is sprayed on gloss oil, mute oil on coloured common plastic cement lacquer (as oleic series paint) by the oil of different ratios configuration.Aspect construction, require higher relatively, generally need be by automatic spraying coating line spraying under dustfree environment below 10,000 grades, and require the rate of drying of color, thickness and paint etc. many aspect the height unanimity.To this, though domestic the development already about research, but effect is limited and based on exterior coating for building and metallic paint, as China's No. 02153925 patent application " a kind of luster coating and preparation method thereof ", and No. 02138207 patent application " ultraviolet-curing paint ", Chinese ZL00109041 patent " ultraviolet-curing paint " etc.Up to the present simultaneously, the also many preparation of raw material with low functionality of disclosed UV coating form in the finding document, and this has limited the over-all properties of the finished product greatly.
Summary of the invention
The purpose of this invention is to provide a kind of performance and reach country row internal standard, best in quality, phone housing ultraviolet-curing paint that price is lower.
Designed a kind of ultraviolet-curing paint according to above-mentioned purpose, comprise low functionality monomer, low functionality prepolymer, auxiliary agent, light trigger and mixed solvent in the component of this coating, also include the monomer of high functionality and the prepolymer of high functionality in its component.The component of described coating is by weight percentage: low functionality monomer 1~10, high functionality monomer 5~15, low functionality prepolymer 15~35, high functionality prepolymer 30~50, auxiliary agent 0~3, light trigger 2~5, mixed solvent 15~30.
Described low functionality monomer is meant---the single functionality monomer comprises 4EO nonyl phenol mono acrylic ester, 2-phenolic group ethyl propylene acid esters, dodecyl monomer acrylate etc., the difunctionality monomer comprises 1,6-hexanediyl ester (HDDA), tripropylene glycol diacrylate (TPDGA), 8EO-modified bisphenol A diacrylate, ethoxylation HDDA etc., three-functionality-degree monomer comprise Viscoat 295 (TMPTA), propoxylation modification TMPTA, 14EO modification TMPTA etc.Described high functionality monomer is meant---four functionality monomer: alkoxylate tetramethylol methane tetraacrylate; Five functionality monomer: dipentaerythrityl ether five acrylate; Six functionality monomer: dipentaerythrityl ether six acrylate (DPHA).
Described low functionality prepolymer is meant that the quantity of carbon-to-carbon double bond (DB/mol) is 1~3 prepolymer, comprises epoxy acrylic esters resin, polyester acrylic esters resin, urethane acrylate resinoid, polyoxyalkylene acrylate esters resin; Described high functionality prepolymer is meant that the quantity of carbon-to-carbon double bond (DB/mol) is>3 prepolymer, comprises epoxy acrylic esters resin, polyester acrylic esters resin, urethane acrylate resinoid, polyoxyalkylene acrylate esters resin.
In addition, light trigger comprises 2-methyl-2-hydroxyl-1-phenyl-1-acetone, 1-hydroxyl-cyclohexyl-phenyl ketone, benzophenone, 2,4,6 (trimethylbenzoyl) diphenyl phosphine oxide (TPO) etc.; Mixed solvent comprises alcohols---ethanol, n-propyl alcohol, Virahol, propyl carbinol etc., ester class---vinyl acetic monomer, N-BUTYL ACETATE etc., ketone---acetone, butanone, methyl iso-butyl ketone (MIBK), pimelinketone etc., pure ethers---ethylene glycol monoethyl ether, ethylene glycol monobutyl ether etc.; Auxiliary agent comprises flow agent, wetting, dispersion agent, and defoamer.
The present invention is owing to selected monomer and the prepolymer that contains various functionality for use, by functionality gradient design prescription, thereby make prepared UV coating after spraying coating line sprays on the phone housing automatically, significantly improve surface hardness and wear-resisting, good flexility and chemical resistance, satisfied cell phone manufacturer and cellphone subscriber's requirement.
Specific embodiments
Thinking of the present invention is the defective at existing UV coating based on low functionality monomer and prepolymer, by increasing the quality after high functionality monomer and high functionality prepolymer improve the quality of coating and guarantee use.Below in conjunction with example technical scheme of the present invention is described further.
At first, introduce the prepolymer that the present invention adopts.Divide tabulation as follows by functionality:
Table one: low functionality (1~3DB/mol) prepolymer and production firm
Table two: high functionality (>3DB/mol) prepolymer and production firm
Example 1.Difunctionality monomer TPGDA 3%, six functionality monomer DPHA 10%, low functionality prepolymer 3016 (section is peaceful) 20%, high functionality prepolymer UV-7600B (Japan is synthetic) 30% and 625C-60 (Changxing chemical industry) 15%, mixed solvent 20%, auxiliary agent 2%.Above-mentioned component is added in the reactor, and high-speed stirring is even, filters and packages to get final product, and film performance sees Table three.
Example 2.Difunctionality monomer HDDA 10% and TPGDA 8%, six functionality monomer DPHA 5%, low functionality prepolymer 3016 (section is peaceful) 20% and CN2200 (Sartomer) 10%, high functionality prepolymer UV-7600B (Japan is synthetic) 30% and CN997-60 (Sartomer) 15%, mixed solvent 25%, auxiliary agent 2%.The mixing manufacture method is identical with example 1, and film performance sees Table three.
Example 3.Difunctionality monomer TPGDA 8%, six functionality monomer DPHA 15%, low functionality prepolymer LR8986 (BASF AG) 20%, high functionality prepolymer UV-7600B (Japan is synthetic) 20% and LR9004 (BASF AG) 14%, mixed solvent 20%, auxiliary agent 3%.The mixing manufacture method is identical with example 1, and film performance sees Table three.
Example 4.Difunctionality monomer TPGDA 10%, five functionality monomer dipentaerythrityl ethers, five acrylate 7% and six functionality monomer DPHA 10%, low functionality prepolymer 6008 (Kening Co.,Ltd) 10%, high functionality prepolymer UV-7640B (Japan is synthetic) 30% and LR9004 (BASF AG) 10%, mixed solvent 20%, auxiliary agent 3%.The mixing manufacture method is identical with example 1, and film performance sees Table three.
Example 5.Difunctionality monomer TPGDA 10% and three-functionality-degree monomer TMPTA 5%, six functionality monomer DPHA 10%, low functionality prepolymer 621A-80 (Changxing chemical industry) 10%, high functionality prepolymer UV-7600B (Japan is synthetic) 20% and 6311-100 (Changxing chemical industry) 20%, mixed solvent 22%, auxiliary agent 3%.The mixing manufacture method is identical with example 1, and film performance sees Table three.
Table three: the experiment film performance detects table
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
Hardness (Chinese pencil) | ????>2H | ????>2H | ????>2H | ????>2H | ????>2H |
Sticking power (3M glue) | 0 grade | 0 grade | 0 grade | 0 grade | 0 grade |
Wear resistance (RCA) | >350 times | >500 times | >500 times | >350 times | >350 times |
Ethanol-tolerant (75%) | >1000 times | >1000 times | >1000 times | >1000 times | >1000 times |
Acid resistance 5%Hcl 48h | No change | No change | No change | No change | No change |
Alkalescence 5%NaOH 48h | No change | No change | No change | No change | No change |
Perspiration resistance (72h) | No considerable change | No considerable change | No considerable change | No considerable change | No considerable change |
Snappiness | ????180° | ????180° | ????180° | ????180° | ????180° |
Annotate:
1, wearability test: the RCA abrasion instrument that the present general employing U.S. promise Man of mobile phone manufacturing is produced is tested;
2, snappiness test: press the industry detection method that mobile phone is made, behind folding 180 ° of the workpiece after the construction, colored paint and the not explosion of UV supercoat;
3, all the other project testings are tested by relevant criterion.
From last table detected result as can be known, the present invention has realized the goal of the invention requirement, has surpassed the performance index of currently available products.