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A kind of quick-drying dual-curing resin and its preparation method and application
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A dual-curing, fast-drying technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylate, etc., can solve the problem of coating film wrinkling and other problems, achieve high flexibility and adhesion, excellent performance, The effect of accelerating the curing speed
Active Publication Date: 2016-08-31
HEFEI UNIV OF TECH
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[0003] The invention provides a fast-drying ultraviolet-oxygen dual-curing resin, which can not only further accelerate the curing speed on the existing basis, but also adopts branched prepolymers to solve the problem under the premise of ensuring the multifunctionality of the resin It solves the problem of wrinkling of the coating film after curing as the thickness of the coating increases, and broadens the scope of practical applications. The coating film has excellent performance after curing and can be used as an optical fiber coating
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Embodiment 1
[0024] (1) Add 1mol of GMA to a 500ml flask, add aluminum acetylacetonate accounting for 1% of the total mass of the reaction raw materials in this step, stir, add 0.8mol of linolenic acid after heating up to 80°C, protect with nitrogen, and heat up to 130°C Reaction 3h, obtains the prepolymer shown in formula (II);
[0025] (2) Add 0.8mol maleic anhydride in a 500ml flask, heat up to 50°C, slowly add the prepolymer shown in formula (II) containing 0.8mol OH groups synthesized in the first step in the maleic anhydride, and heat up Reaction at 80° C. for 2 hours to obtain a prepolymer shown in formula (III);
[0026] (3) Add 1mol GMA in a 500ml flask, add aluminum acetylacetonate accounting for 1% of the total mass of the reaction raw materials in this step, stir, and add the 0.8molCOOH group synthesized in the second step containing 0.8molCOOH group after stirring. The prepolymer was shown, under nitrogen protection, the temperature was raised to 130°C for 3 hours, and the fi...
Embodiment 2
[0029] (1) Add 1mol of GMA in a 500ml flask, add 1-methylimidazole accounting for 0.5% of the total mass of the reaction raw materials in this step, stir, and add 1mol of linoleic acid after the temperature is raised to 80°C, nitrogen protection, and heat up to 130 ℃ for 3 hours to obtain the prepolymer shown in formula (II);
[0030] (2) Add 1 mol of allyl succinic anhydride to a 500ml flask, raise the temperature to 60°C, and slowly add the prepolymer shown in formula (II) containing 1 mol of OH groups synthesized in the first step into allyl succinic anhydride , heating up to 80° C. for 2 hours to obtain a prepolymer as shown in formula (III);
[0031] (3) Add 1mol GMA to a 500ml flask, add 1-methylimidazole accounting for 0.5% of the total mass of the reaction raw materials in this step, stir, and add the formula (Ⅲ) containing 1molCOOH group synthesized in the second step after heating up to 80°C The prepolymer shown was protected by nitrogen, heated to 130° C. for 3 hou...
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Abstract
The invention discloses a quick-drying dual-curing resin. The molecular structure is disclosed as Formula (I), wherein R is -CH=CH- or disclosed in the specification. The invention also discloses a preparation method of the quick-drying dual-curing resin. The resin structure contains acrylate double bond (capable of ultraviolet free radical curing) and unsaturated fatty acid (capable of oxygen curing or thermocuring), and thus, the quick-drying dual-curing resin is a polyfunctional high-activity dual-curing resin. The unsaturated acid anhydride grafting reaction is adopted to solve the problem of obvious film wrinkling due to the increase of the film thickness on the basis of ensuring the functionality. The cured film has higher flexibility and adhesive force, and has excellent performance when being used as a dual-curing coating for optical fibers.
Description
technical field [0001] The invention belongs to synthetic resins for photocuring, in particular to the preparation and application of a fast-drying ultraviolet-oxygen dual-curing resin. Background technique [0002] UV curing technology is an energy-saving and environmentally-friendly new technology, which has the characteristics of economy, energy saving, and ecological protection, and is called "green technology". However, the current UV curing time is too long and needs to be further shortened to be suitable for industrial production. At the same time, the monomers and prepolymers in the widely used UV-curable resins are highly irritating and corrosive, and are more harmful to the human body. In addition, the diluting monomers in the existing UV-curable coatings contain a large amount of volatile organic compounds, and in some applications, the wrinkling phenomenon of the coating film will appear as the thickness of the coating increases. Contents of the invention [...
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