Method capable of improving opening time of phenolic resin adhesive
A phenolic resin glue, open time technology, used in adhesives, adhesive additives, aldehyde/ketone condensation polymer adhesives, etc., can solve the problems of drying of the sizing surface, cracking of the assembly, affecting the production efficiency of the board, etc. To achieve the effect of simple operation and improved opening time
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Embodiment 1
[0029] 1) Add weighed deionized water into the reaction kettle and dilute and dissolve 3 parts of pentaerythritol, and stir evenly;
[0030] 2) Add 3 parts of hydroxymethyl cellulose ether into the reaction kettle and slowly raise the temperature to 50°C, and stir until the cellulose ether is completely dissolved;
[0031] 3) Cool down to normal temperature and add 2 parts of xanthan gum to dissolve, and finally adjust the solid content of the solution to 45%;
[0032] 4) Add the prepared solution into 100 parts of adhesive, stir for 30 minutes, and finally obtain an adhesive with a longer open time.
Embodiment 2
[0034] 1) add the deionized water of weighing number and 8 parts of 1,4-butanediol dilution and dissolving in reactor, stir;
[0035] 2) Add 1 part of hydroxyethyl cellulose ether into the reaction kettle and slowly raise the temperature to 60°C, and stir until the cellulose ether is completely dissolved;
[0036] 3) Cool down to normal temperature and add 3 parts of xanthan gum to dissolve, and finally adjust the solid content of the solution to 45%;
[0037] 4) Add the prepared solution into 100 parts of adhesive, stir for 20 minutes, and finally obtain an adhesive with a longer open time.
Embodiment 3
[0039] 1) Add weighed deionized water into the reaction kettle and dilute and dissolve 5 parts of ethylene glycol, and stir evenly;
[0040] 2) Add 5 parts of carboxymethyl cellulose ether into the reaction kettle and slowly raise the temperature to 55°C, and stir until the cellulose ether is completely dissolved;
[0041] 3) Cool down to normal temperature and add 5 parts of xanthan gum to dissolve, and finally adjust the solid content of the solution to 45%;
[0042] 4) Add the prepared solution into 100 parts of adhesive, stir for 25 minutes, and finally obtain an adhesive with a longer open time.
[0043] The comparative example is the phenolic resin adhesive without the solution
[0044] Numbering Opening time / min Example 1 120 Example 2 115 Example 3 113 comparative example 40
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