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An anionic light-curing thiol-epoxy adhesive
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An epoxy adhesive and light-curing technology, applied in the field of light-curing, can solve the problems of low photo-alkali-generating dose quantum yield, etc., and achieve the effect of improving reactivity, high hardness of adhesive layer, and high reactivity
Active Publication Date: 2022-05-17
JIANGNAN UNIV
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Problems solved by technology
Due to the low photobase generator quantum yield, the coating still needs a long time of light and post-baking
Method used
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Embodiment 1
[0025] Embodiment 1: The following materials are mixed in proportion to form an anionic photocurable thiol-epoxy adhesive.
[0026]
[0027] Among them, hydantoin epoxy resin MHR070 was purchased from Guangzhou Taiji New Material Co., Ltd., with an epoxy value of 0.7 and in a liquid state.
[0028] Among them, tetrakis (3-mercaptobutyric acid) pentaerythritol ester is liquid.
[0029] Among them, 1,3,5-tris(3-mercaptopropyl)isocyanurate is solid.
[0030] The molar amounts of mercapto groups of pentaerythritol tetrakis(3-mercaptobutyrate) and 1,3,5-tris(3-mercaptopropyl)isocyanurate were 0.023 mol and 0.012 mol, respectively.
[0031] Hydantoin epoxy resin MHR070 epoxy molar weight is 0.035mol.
Embodiment 2
[0032] Embodiment 2: adopt the component ratio of embodiment 1, stir and dissolve photobase generator and photosensitizer and resin, be coated on the steel plate, steel plate is cured by ultraviolet light, in crawler type UV curing machine (Fusion company, F300UV ) under light for 9 times, cured and formed, and then cured after being placed at 80°C for 2 hours.
Embodiment 3
[0033] Embodiment 3: The following materials were mixed in proportion to form an anionic photocurable thiol-epoxy adhesive.
[0034] Element specific substance mass percentage Hein Epoxy MHR154B 45％ Thiol 1 Tetrakis(3-mercaptobutyrate)pentaerythritol ester 35％ Thiol 2 2,4,6-Trimercapto-s-triazine 10％ Active diluent Trimethylolpropane triglycidyl ether 5％ photobase generator TBD·HBPh 4
3％ Photosensitizer ITX 2％
[0035] Among them, hydantoin epoxy resin MHR154B was purchased from Guangzhou Taiji New Material Co., Ltd., with an epoxy value of 0.5 and in a liquid state.
[0036] Among them, tetrakis (3-mercaptobutyric acid) pentaerythritol ester is liquid.
[0037] Among them, 2,4,6-trimercapto-s-triazine is in solid state.
[0038] The molar amounts of pentaerythritol tetrakis(3-mercaptobutyrate) and 2,4,6-trimercapto-s-triazine mercapto were 0.0188 mol and 0.0062 mol, respectively.
[0039] The epoxy molar w...
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Abstract
The invention relates to an anionic light-cured thiol-epoxy adhesive, which belongs to the field of light-cure. The components of the anionic light-cured mercaptan-epoxy high-hardness adhesive include 40-60 parts of hydantoin epoxy resin, 20-45 parts of mercaptan-1, 5-30 parts of mercaptan-2, 10- 30 parts of reactive diluent, 1-5 parts of photobase generator, wherein thiol-1 and thiol-2 are different substances, thiol-1 is a liquid resin, and thiol-2 has a heterocyclic or benzene ring structure. The adhesive has good bonding performance, high reactivity, long pot life, high hardness of the adhesive layer, good wear resistance and high temperature resistance.
Description
technical field [0001] The invention relates to an anionic light-cured mercaptan-epoxy adhesive, which belongs to the field of light-cured. Background technique [0002] Light-curing technology has the advantages of green, energy saving, and environmental protection, and can be applied to coatings, adhesives, and dental repair materials. Anionic photocuring uses a photobase generator as an initiator, and the curing system has a small shrinkage rate, anaerobic polymerization inhibition, and low corrosion to the substrate. Due to the low quantum yield of photobase generators, the coating still needs to be illuminated for a long time and post-baked. [0003] Epoxy resin has outstanding bonding performance and is widely used in the field of electronic packaging. Using highly active hydantoin epoxy resin to react with mercaptans can increase the curing speed of the photoalkali system, and the formula has a longer pot life; Rigid structure mercaptan compound can increase the har...
Claims
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