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Ultraviolet-curing light oil for plastic top-coat and preparation method thereof

A technology of ultraviolet light and varnish, applied in polyester coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as the inability to further improve coating film performance, increase the content of inorganic components in coatings, and harm the environment and human body, and achieve Excellent wear resistance, improved mechanical properties and heat, good decorative effect

Inactive Publication Date: 2012-11-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, UV curing organic / inorganic hybrid coatings generally use linear polymers, which have high viscosity, and a large amount of active diluent or solvent needs to be added during preparation, which will not only cause shrinkage and cracking of the cured film, but also contain a large amount of organic Volatile substances are easy to cause harm to the environment and human body; in addition, there are compatibility problems, which greatly limit the increase in the content of inorganic components in the coating, and cannot further improve the performance of the coating film

Method used

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  • Ultraviolet-curing light oil for plastic top-coat and preparation method thereof
  • Ultraviolet-curing light oil for plastic top-coat and preparation method thereof
  • Ultraviolet-curing light oil for plastic top-coat and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The weight percent composition of the UV-curable varnish for plastic topcoat is as follows:

[0030] Hyperbranched polyester acrylate (UVR-55, Japan Toi Chemical Co., Ltd.) 60%

[0031] Trimethylolpropane Triacrylate (TMPTA) 14%

[0032] Dipropylene glycol diacrylate (DPGDA) 6%

[0033] Hydroxycyclohexylbenzophenone (Irgacure184) 3%

[0034] Gas phase nano-SiO 2 (Degussa AEROSIL R972) 6%

[0035] Leveling agent (BYK306) 1%

[0036] Isopropanol 5%

[0037] Butyl acetate 5%

[0038] During the preparation, 6 g of Gas phase nano-SiO 2 (Degussa AEROSIL R972) was uniformly dispersed in 14g reactive diluent trimethylolpropane triacrylate (TMPTA) and 6g dipropylene glycol diacrylate (DPGDA), and then added 60g hyperbranched polyester acrylate ( Japan Toi Chemical Co., Ltd. UVR-55), 3g initiator hydroxycyclohexyl benzophenone (Irgacure184), 1g leveling agent BYK306, 5g isopropanol, 5g butyl acetate, mix well and stir well to obtain UV-curable coating.

[0039] Spray t...

Embodiment 2

[0041] The weight percent composition of the UV-curable varnish for plastic topcoat is as follows:

[0042] Hyperbranched polyester acrylate (UVR-55, Japan Toi Chemical Co., Ltd.) 15%

[0043] Hyperbranched polyurethane acrylate (UVR-52, Japan Toi Chemical Co., Ltd.) 46%

[0044] Trimethylolpropane Triacrylate (TMPTA) 10%

[0045] Tripropylene glycol diacrylate (TPGDA) 7%

[0046] Hydroxycyclohexylbenzophenone (Irgacure184) 2%

[0047] α,α-Dimethyl-α-hydroxyacetophenone (Irgacure1173) 1%

[0048] Gas phase nano-SiO 2(Degussa AEROSIL R972) 4%

[0049] Leveling agent (GLK383) 2%

[0050] Ethyl acetate 5%

[0051] Butyl acetate 8%

[0052] During the preparation, 4g of Gas phase nano-SiO 2 (Degussa AEROSIL R972) was uniformly dispersed in 10g reactive diluent TMPTA and 7gDPGDA in advance, and then added 15g hyperbranched polyester acrylate (UVR-55 from Japan Toi Chemical Co., Ltd.), 46g hyperbranched polyurethane acrylate ( Japan Toi Chemical Co., Ltd. UVR-52), 2g init...

Embodiment 3

[0055] The weight percent composition of the UV-curable varnish for plastic topcoat is as follows:

[0056] Hyperbranched polyester acrylate (UVR-55, Japan Toi Chemical Co., Ltd.) 27%

[0057] Hyperbranched urethane acrylate (UVR-52, Japan Toi Chemical Co., Ltd.) 38%

[0058] Trimethylolpropane Triacrylate (TMPTA) 7%

[0059] 1,6-Hexanediol diacrylate (HDDA) 6%

[0060] Hydroxycyclohexylbenzophenone (Irgacure184) 3%

[0061] Gas phase nano-SiO 2 (Degussa AEROSIL R972) 5%

[0062] Leveling agent (BYK361) 2%

[0063] Butyl acetate 6%

[0064] Methyl isobutyl ketone 6%

[0065] During the preparation, a high-speed shear disperser (GFJ-0.4 type, Shanghai Modern Environmental Engineering Technology Co., Ltd.) and ultrasonic oscillation (ultrasonic cell disruptor BRANSON Models450) were used to dissolve 5 g of nano-SiO 2 (Degussa AEROSIL R972) was uniformly dispersed in 7g of reactive diluent TMPTA and 6g of HDDA in advance, and then 27g of hyperbranched polyester acrylate ...

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Abstract

The invention discloses ultraviolet-curing light oil for plastic top-coat and a preparation method of the light oil. The ultraviolet-curing light oil is prepared from the following components by weight: 52-73% of hyperbranched polymer, 10-20% of reactive diluent, 3-5% of photoinitiator, 3-6% of inorganic nanomaterial, 1-2% of flatting agent and 10-15% of solvent. The preparation method comprises the steps of: uniformly dispersing modified nano SiO2 (silicon dioxide) into the reactive diluent in advance by adopting a high-speed shear dispersing machine and an ultrasonic cell crusher in preparation, adding hyperbranched polyester acrylate, the initiator, the flatting agent and the solvent, fully mixing and agitating the mixture uniformly to obtain the ultraviolet-curing light oil. According to the invention, the hyperbranched polymer is used as an organic component; the nanomaterial is used as an inorganic component, and the advantages of high hardness, durability, heat resistance and weather fastness of the inorganic nanomaterials as well as low viscosity and compatibility with the inorganic nanoparticles of the hyperbranched polymer are comprehensively utilized.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to an ultraviolet-curable varnish for plastic topcoats and a preparation method thereof, which is an ultraviolet-curable varnish that can be applied to the surfaces of plastic shells such as keyboards, mice, mobile phones, and televisions. Background technique [0002] UV-curable coatings are an environmentally friendly and energy-saving coating developed by Bayer Corporation of Germany in the late 1960s. The coating undergoes a photochemical reaction after being irradiated by ultraviolet light, so that the coating is rapidly polymerized, cross-linked and cured. Compared with traditional heat-curing coatings, UV-curing coatings have the advantages of energy saving and environmental protection, high production efficiency, fast curing speed, and wide application range to substrates. For a broad market prospect. [0003] With the improvement of the decorative effect and protective...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D175/14C09D7/12
Inventor 沈慧芳严小妹
Owner SOUTH CHINA UNIV OF TECH
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