Preparation method of ultraviolet cured adhesive for flat panel display
A flat-panel display device and ultraviolet light technology, applied in the direction of adhesives, epoxy resin glue, adhesive types, etc., can solve the problems of UV glue high temperature resistance, high humidity resistance and low temperature resistance, liquid crystal filling port pollution, etc., to achieve Excellent resistance to high humidity and guaranteed long life
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Embodiment 1
[0028] (1) Preparation of main glue: synthesis of bisphenol A epoxy acrylate prepolymer (Y1)
[0029] Add 1800 grams of E-51 epoxy resin to a 3L three-necked flask with a decompression device, heat up to 120°C, vacuumize to remove a small amount of solvent and moisture remaining in the resin, and then add 2.8 grams of tetrabutyl bromide After the ammonium (catalyst) was stirred and dissolved, 433 g of polyether type bisphenol A (2,2-bis(4-hydroxyphenyl) propane) was added in batches at 100-110° C., and then kept for 1.5 hours for reaction. Add 5 grams of hydroquinone (stabilizer), slowly dropwise add 394 grams of methacrylic acid, keep the temperature for reaction for 5 hours after the dropwise addition, until the acid value is qualified through detection. The method for judging the qualified acid value is as follows: take 0.5-1.0 g of a sample, dissolve it in a conical flask with about 30 ml of methanol:toluene=1:1 mixed solution, add 3 drops of ethanol solution of phenolphth...
Embodiment 2
[0035] (1) Preparation of main glue: synthesis of bisphenol A epoxy acrylate prepolymer (Y2)
[0036] Add 2500 grams of E-44 epoxy resin to a 3L three-necked flask with a decompression device, heat up to 120°C, vacuumize to remove a small amount of solvent and water remaining in the resin, and then add 2.8 grams of tetrabutyl bromide Ammonium (catalyst), after stirring and dissolving, add 433 grams of polyether type bisphenol A in batches at 100-110° C., and then keep warm for 1.5 hours. After adding a small amount of catalyzer and hydroquinone (stabilizer), slowly dropwise add 394 grams of acrylic acid, and after the dropwise addition, keep warm for 5 hours until the acid value is qualified. Evacuate under reduced pressure to evaporate unreacted residual small molecules, cool down and filter the material, and store in the dark.
[0037] (2) Preparation of reinforcing glue: synthesis of polyether epoxy acrylate prepolymer (Y3)
[0038] Add 2100 grams of 663 epoxy resin (epox...
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