Hyperbranched polyurethane acrylate UV light-cured resin and preparation method thereof
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A polyurethane acrylate and light-curing resin technology, applied in the direction of polyurea/polyurethane coatings, polyurea/polyurethane adhesives, adhesive types, etc., can solve the problems of fast photocuring, etc., and achieve the effect of broad application prospects
Inactive Publication Date: 2014-04-09
JIANGMEN POLYTECHNIC +2
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But these hyperbranched polyurethanes are not fast photocurable
Method used
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Experimental program
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Effect test
Embodiment 1
[0019] Add a mixture of 6.75g 1,4-butanediol (BDO) and 20g N, N-dimethylformamide (DMF) to 33.344g isophorone diisocyanate (IPDI) under stirring at 50°C, reaction 2 Hours, a colorless transparent liquid was obtained; the reaction system was cooled to 0°C, and a mixture of 7.89g diethanolamine (DEOA) and 20g N, N-dimethylformamide (DMF) was added to the reaction system and reacted for 3 hours , to obtain a colorless transparent liquid; control the reaction conditions, capping after 4.5 hours of reaction, separation and drying to obtain white powder hyperbranched polyurethane.
[0020] Add 44.458g IPDI and 50g DMF mixture under stirring at 50°C, add dropwise 23.224g HEA and 30g DMF solution into the constant pressure dropping funnel, and react for 4 hours to obtain a semi-adduct of IPDI / HEA.
[0021] Calculate the remaining -OH content in the hyperbranched polyurethane, then add IPDI / HEA in an equimolar amount, raise the temperature to 45°C, react for 3 hours and end-cap, separ...
Embodiment 2
[0023] Dissolve 26.123g of toluene diisocyanate (TDI) in 30g of N,N-dimethylformamide (DMF), add 8.85g of 1,6-hexanediol (HDO) and 10g of N,N-di A mixture of methylformamide (DMF) was reacted at constant temperature for 3 hours to obtain a light yellow transparent liquid; the system was cooled to -10°C, and 7.89g of diethanolamine (DEOA) and 10g of N,N-dimethylformamide (DMF) mixed solution was added to the reaction system, and reacted for 3 hours to obtain a yellowish transparent liquid; the reaction conditions were controlled, and after 4 hours of reaction, it was capped, separated and dried to obtain white powder hyperbranched polyurethane.
[0024] Add 33.344g IPDI and 50g DMF mixed solution under stirring at 40°C, add 17.418g HEA and 30g DMF solution dropwise through a constant pressure dropping funnel, and react for 4 hours to obtain a semi-adduct of IPDI / HEA.
[0025] Calculate the remaining -OH content in the hyperbranched polyurethane, then add IPDI / HEA in an equimol...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract
The invention provides a hyperbranched polyurethane acrylate UV light-cured resin with a novel structure, and relates to an application of the resin. The resin has the following structure as shown in the specification. A preparation method of the resin comprises the steps: firstly carrying out a reaction of a diisocyanate monomer with a dihydric alcohol, and then carrying out a reaction with a single amino polyhydroxy monomer to prepare an ABn reaction intermediate having end groups with an isocyanate group and a plurality of hydroxyl groups; allowing the ABn reaction intermediate to undergo a self-polycondensation reaction, and preparing hyperbranched polyurethane (HPU-Xm) containing terminal hydroxyl groups; carrying out a reaction of the diisocyanate monomer with hydroxyalkyl acrylate, and thus obtaining a reaction intermediate C containing an isocyanate terminal group and an acrylic double bond terminal group; and carrying out a reaction of the reaction intermediate C with HPU-Xm, and obtaining the UV light curable hyperbranched polyurethane acrylate resin product averagely containing 2-32 double bonds. The product contains more terminal double bonds, can perform fast light curing, is suitably used as UV curable coatings, adhesives, rheological processing additives, active compounds and the like, and has wide application prospects.
Description
technical field [0001] The invention belongs to the technical field of photocurable resins, in particular to a preparation method of hyperbranched polyurethane acrylate UV photocurable resins. Background technique [0002] Ultraviolet (UV) curing technology is a new technology for energy saving and environmental protection. UV curing materials do not contain or only contain a small amount of solvent, and the energy used for UV curing is electric energy, so UV curing is known as "green technology". In 1946, Inmont Company of the United States applied for the first patent of UV curing ink. In 1968, Bayer Company of Germany developed the first generation of UV curing wood coatings. UV curing technology developed rapidly in the world. [0003] As early as 1952, Flory proposed that highly branched polymers could be prepared from multifunctional monomers; research on polymers. Until the mid-1980s, DuPont's Kim et al. purposefully synthesized a hyperbranched polymer, and applied...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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