Removable adhesive compsns and process for producing same
An adhesive and peel-off technology, applied in the direction of adhesive types, other rubber adhesives, polymer adhesive additives, etc., can solve problems that have not been considered and accelerate the peeling speed
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Embodiment 1
[0199] (1) Production of water-peelable adhesive composition
[0200] In a melting kettle kept at 180° C., 100 weight units of SIS block copolymer as the base resin and 0.2 weight units of phenolic antioxidant were filled, and stirred with a planetary mixer for 3 hours to melt evenly. Then, KI gel 201K-F2 (manufactured by KURARE Corporation, whose average particle diameter is 15 μm) formed by 30 weight units of C5 series hydrogenated petroleum resin and 35 weight units of cross-linked isobutylene-anhydrous maleic acid copolymer , water absorption rate is 200 times), 7 weight units of polyethylene glycol glycerol monostearate (HLB: 15.7) as a surfactant, 5 weight units of liquid paraffin as a plasticizer (flammability: 256 ° C, density : 0.865g / cm 3 ) into the melting pot. Then stir for 1 hour with a planetary mixer, and after confirming that the various components have been uniformly mixed and melted, the water-peelable adhesive composition of Example 1 is obtained. A1 show...
Embodiment 2～5
[0209] As shown in Table 1, what Example 2 discusses is the impact of reducing the amount of surfactant used in Example 1, and what Example 3 discusses is the water-absorbing cross-linked polymer used in Example 1, The impact of the different dosages of adhesive additives and surfactants, the discussion in Example 4 is the impact of changing the type of surfactant in Example 3, and the discussion in Example 5 is that of Example 1 without using The influence of adhesive additives or surfactants.
[0210] As can be seen from Table 1, in Example 2, since the amount of surfactant used has decreased compared with Example 1, although the initial adhesion has been enhanced, the tendency of the adhesion after water absorption to decrease is got smaller. In Example 3, compared with Example 1, the amount of water-absorbing cross-linked polymers was increased, while the amount of adhesive additives or surfactants was reduced. Therefore, while the initial adhesion was enhanced, after wat...
Embodiment 6
[0224] (1) Structure of water-peelable adhesive composition
[0225] In the water-peelable adhesive composition discussed in this example, under the condition of adding a relatively large amount of adhesive agent, the effect on the average particle size of the water-absorbing cross-linked polymer. That is to say, in a melting tank whose temperature is kept at 180° C., after filling 30 weight units of SIS block copolymer as the base resin and 0.2 weight units of phenolic antioxidant, stir with a planetary mixer for 3 hours to make It melts uniformly. Next, according to 50 weight units of C5 series hydrogenated petroleum resin, 21 weight units of K201-F2 (average particle diameter of 30 μm, water absorption rate of 200 times, represented by B2 in Table 2) as a water-absorbing cross-linked polymer, 5 weight units of liquid paraffin as a plasticizer (burning point: 256°C, density: 0.865g / cm 3 ) into the melting pot. Then use a planetary mixer to stir for 1 hour, and after confi...
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