A kind of film-coated sealing glue and preparation method thereof
A sealing glue and film coating technology, applied in the direction of adhesives, adhesive types, polymer adhesive additives, etc., can solve the problems of unsmooth spraying, high viscosity, poor fluidity, etc., and achieve fast curing speed and weather resistance. Good properties and the effect of increasing the low temperature resistance of the glue
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Embodiment 1
[0051] A preparation method of film-coated sealing glue, comprising the steps of:
[0052] S1. Set the temperature of the reactor to 180°C. When the temperature of the reactor rises to 100°C, accurately weigh and add 30 parts of paraffin wax. The speed of the reaction kettle is controlled at about 1200r / h, and stirred for 25 minutes until it is completely melted;
[0053] S2. Add 0.5 parts of antioxidant 1010 and 30 parts of SIS-1 to the reaction kettle of S1, stir at a speed of 1200r / h, and stir and mix for 1.5h until completely melted;
[0054] S3. Add 20 parts of rosin resin and 20 parts of C5 petroleum resin to the reaction kettle of S2, stir at a speed of 1200r / h, stir for 40min until completely melted, keep warm at 100°C and vacuum for 40min, vacuum pressure -0.06MPa;
[0055] S4. After filtering the mixture liquid of S3 through a 200-mesh double-layer filter bag, it is then fed to a single-screw extruder for extrusion underwater granulation (screw speed 900r / h, granula...
Embodiment 2
[0069] The hot-melt adhesive for coated cartons of compositions 1-5 in Example 1 has better low-temperature resistance, but the effect of bonding and breaking materials at high temperatures is still poor, which is mainly due to the poor cohesive strength of the hot-melt adhesive and It is caused by poor adhesion to the non-polar film surface of the laminated carton. In order to further improve the viscosity of the hot-melt adhesive to the coating surface and the cohesive strength of the hot-melt adhesive, this patent introduces a polymer hydrocarbon wax modified by maleic anhydride with a high softening point to increase the cohesive strength of the hot-melt adhesive and increase the thermal The polarity of the melt adhesive system is used to increase the adhesion to the non-polar membrane surface.
[0070] The design example 2 is as follows. The distribution ratio of the raw materials for each group of experiments is shown in Table 2.1, and it was prepared according to the pr...
Embodiment 3
[0080] Taking the composition 2-4 in Example 2 as the experimental basis, further adjust the ratio of C5 petroleum resin and rosin resin, and find that the ratio of tackifying resin has a great influence on hot melt adhesive viscosity, softening point and hardness through a large number of experiments. and smoothness have a certain influence. From the above-mentioned experimental optimization process and test results, it can be concluded that the properties of compositions 2-4 are kept at a relatively high level.
[0081] Further design the following experiments to carry out the adjustment and analysis of the dosage of C5 resin and rosin resin, and prepare the film-coated box-sealing glue according to the preparation method in Example 1. The viscosity, softening point, granulation (hardness) and smoothness (static friction coefficient) of the hot melt adhesive were studied.
[0082] List of raw materials of each component in table 3.1, embodiment 3
[0083]
[0084] List ...
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