A kind of adhesive and its preparation method and application
A technology of adhesives and film-forming agents, applied in the direction of adhesives, adhesive additives, adhesive types, etc., can solve the problem of coating viscosity and high shear rise, high viscosity value of starch adhesive, and adhesive stability General and other problems, to achieve the effect of good viscosity stability, good fluidity and stability, and good operation
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Embodiment 1-10
[0029] Embodiment 1-10 Adhesive
[0030] The formulation of the adhesive of the present invention is shown in Table 1 and Table 2.
[0031] The formula of table 1 embodiment 1-5 adhesive
[0032] Raw materials (parts by weight)
Example 1
Example 2
Example 3
Example 4
Example 5
Cassava starch
100
100
100
100
100
5
7
10
5
10
Ethylene glycol
20
15
15
15
10
PAPU
1
3
3
5
5
Sodium polyacrylate
0.2
0.2
0.2
0.1
0.1
0.015
0.015
0.015
0.018
0.02
[0033] The formula of table 2 embodiment 6-10 adhesive
[0034] Raw materials (parts by weight)
Embodiment 11
[0035] The preparation method of embodiment 11 adhesive
[0036] Prepare embodiment 1 adhesive according to formula in table 1, concrete steps are as follows:
[0037] 1) firstly tapioca starch is mixed with water to make a starch slurry with a mass concentration of 35%;
[0038] 2) Add maleic anhydride to the starch slurry obtained in step 1), and stir to make it fully react for 3 hours;
[0039] 3) Add ethylene glycol, PAPU, sodium polyacrylate, and amylase to the slurry obtained in step 2) in sequence, heat up to 78°C quickly after fully dispersing, keep warm for 25 minutes, and finish the enzymatic modification to obtain an enzyme-modified adhesive.
[0040] Wherein, the deenzyming treatment specifically includes: passing the starch paste liquid obtained by the reaction in step 3) into a serpentine pipeline, and spraying 140° C. water vapor at the same time, keeping it warm for 10 seconds, so that the temperature of the starch paste liquid reaches 130° C. instantly.
[0...
experiment example 1
[0042] Experimental Example 1 Adhesive performance testing
[0043] The adhesives described in Examples 1-10 and the examples with the best effects in CN103757980A and CN102787529A were tested for performance, and the results are shown in Table 3.
[0044] Table 3 Adhesive Performance Test
[0045] ITEM
Viscosity (mPa.s)
Solid content (%)
viscosity stability
pH
Example 1
300
42％
it is good
6-7
Example 2
360
45％
it is good
6-7
Example 3
270
40％
it is good
6-7
Example 4
370
42％
it is good
6-7
Example 5
300
45％
it is good
6-7
Example 6
330
44％
it is good
6-7
Example 7
360
43％
it is good
6-7
Example 8
352
44％
it is good
6-7
Example 9
300
45％
it is good
6-7
Example 10
286
45％
it is good
6-7
CN103757980A
1500
45-50
generally
5-6
CN10278...
PUM
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