Photocuring hot melt adhesive for base material difficult to attach and preparation method of photo-curing hot melt adhesive
A light-curing and base-attaching technology, used in adhesives, adhesive additives, polymer adhesive additives, etc., can solve problems such as cumbersome processes, achieve good adhesion, and avoid the effects of different compatibility
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Embodiment 1
[0026] 1. Add 110 parts of neopentyl glycol and 180 parts of isophthalic acid into the reaction bottle that has been dehydrated and deoxygenated, raise the temperature to 155°C, stir evenly, keep it warm for 2 hours, then add 9 parts of ethyl butyl propylene glycol, and heat up to Continue to keep warm at 180°C for 2 hours to obtain thermoplastic polyester R1.
[0027] 2. Add 16 parts of butanediol and 20 parts of sebacic acid into the reaction flask that has been dehydrated and deoxygenated, mix evenly, raise the temperature to 150° C., and keep it warm for 2 hours to obtain aliphatic polyester Z1.
[0028] 3. Add thermoplastic polyester R1 to aliphatic polyester Z1 and mix evenly, heat up to 210°C, keep warm for 1 hour, add tetrabutyl titanate, antimony trioxide, antioxidant 1010, continue to heat up to 240°C, pass Nitrogen, add xylene to reflux to remove water, keep warm until the acid value is less than 0.1mgKOH / g, to obtain block copolyester.
[0029] 4. After cooling th...
Embodiment 2
[0032] 1. Add 60 parts of ethylene glycol, 9 parts of hydrogenated bisphenol A and 171 parts of isophthalic acid into the reaction bottle that has been dehydrated and deoxygenated, raise the temperature to 155°C, stir evenly, keep it warm for 2 hours, and then add 12 parts of ethyl alcohol butyl propylene glycol, heated to 180°C and continued to keep warm for 2 hours to obtain thermoplastic polyester R2.
[0033] 2. Add 7 parts of PCL1000 and 1 part of adipic acid into the reaction flask that has been dehydrated and deoxygenated, mix well, raise the temperature to 150°C, and keep it warm for 2 hours to obtain aliphatic polyester Z2.
[0034] 3. Add thermoplastic polyester R2 to aliphatic polyester Z2, mix well, heat up to 210°C, keep warm for 1 hour, add tetrabutyl titanate, antimony trioxide, antioxidant 1010, continue to heat up to 240°C, pass Inject nitrogen, add xylene to reflux to remove water, keep warm until the acid value is less than 0.1mgKOH / g, and discharge.
[003...
Embodiment 3
[0044] The photocurable hot melt adhesives obtained in Example 1 and Example 2 and Comparative Example 1-Comparative Example 3 for difficult-to-adhere substrates were tested for performance, and the test results are shown in Table 1.
[0045] Sample preparation method: apply glue on the untreated PP substrate bonding sample at 120°C, irradiate the glue layer with a UV-LED light source with a wavelength of 365nm, and the irradiation dose is 3000mJ / cm 2 , and then attach another adhesive sample to the adhesive layer, and hold the pressure for 30s at room temperature.
[0046] Table 1
[0047]
[0048]
[0049] It can be seen from Table 1 that the light-curable hot melt adhesive for difficult-to-adhesive substrates prepared by Examples 1 and 2 of the present invention has better performance for untreated PP, PET, ABS and other difficult-to-adhesive substrates. Excellent adhesive performance, when the strength is peeled off, it can achieve the effect of breaking the materia...
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