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Preparation method of low-ammonia resin curing agent and low-ammonia resin curing agent
The invention discloses a preparation method of a low-ammonia resin curing agent and the low-ammonia resin curing agent. The preparation method comprises the following steps: adding phenol and a formaldehyde aqueous solution into a caustic soda flake solution to form a first solution; within 50-70 min, heating the first solution to 68-72 DEG C, and then performing heat preservation for 80-100 min,then heating the first solution to 75-80 DEG C, and then performing heat preservation for 80-100 min; cooling the first solution to 35-45 DEG C, then adding salicylic acid, and stirring the solutionto form a second solution; adding ammonia water into the second solution in 6-10 times within 50-70 minutes, and stirring the solution to form a third solution; dehydrating the third solution in vacuum to a preset viscosity, collecting and detecting a water sample, and if qualified, adding methanol and uniformly stirring the sample to prepare the low-ammonia resin curing agent. According to the preparation method of the low-ammonia resin curing agent, the prepared low-ammonia resin curing agent has the advantages of high hot bending strength and long service life.
本发明公开了一种低氨树脂固化剂的制备方法及低氨树脂固化剂，制备方法包括：将苯酚和甲醛水溶液加入片碱溶液中以形成第一溶液；在50‑70min内，将第一溶液加热升温至68‑72℃，然后保温80‑100min；将第一溶液加热升温至75‑80℃，然后保温80‑100min；将第一溶液降温至35‑45℃，然后加入水杨酸，并搅拌，以形成第二溶液；在50‑70min内，分6‑10次向第二溶液加入氨水，并搅拌，以形成第三溶液；将第三溶液真空脱水至预设粘度，取水样检测合格后，加入甲醇并均匀搅拌以制成低氨树脂固化剂。根据本发明的低氨树脂固化剂的制备方法，制造的低氨树脂固化剂具有热弯强度高和使用寿命长的优点。
Preparation method of low-ammonia resin curing agent and low-ammonia resin curing agent
The invention discloses a preparation method of a low-ammonia resin curing agent and the low-ammonia resin curing agent. The preparation method comprises the following steps: adding phenol and a formaldehyde aqueous solution into a caustic soda flake solution to form a first solution; within 50-70 min, heating the first solution to 68-72 DEG C, and then performing heat preservation for 80-100 min,then heating the first solution to 75-80 DEG C, and then performing heat preservation for 80-100 min; cooling the first solution to 35-45 DEG C, then adding salicylic acid, and stirring the solutionto form a second solution; adding ammonia water into the second solution in 6-10 times within 50-70 minutes, and stirring the solution to form a third solution; dehydrating the third solution in vacuum to a preset viscosity, collecting and detecting a water sample, and if qualified, adding methanol and uniformly stirring the sample to prepare the low-ammonia resin curing agent. According to the preparation method of the low-ammonia resin curing agent, the prepared low-ammonia resin curing agent has the advantages of high hot bending strength and long service life.
本发明公开了一种低氨树脂固化剂的制备方法及低氨树脂固化剂，制备方法包括：将苯酚和甲醛水溶液加入片碱溶液中以形成第一溶液；在50‑70min内，将第一溶液加热升温至68‑72℃，然后保温80‑100min；将第一溶液加热升温至75‑80℃，然后保温80‑100min；将第一溶液降温至35‑45℃，然后加入水杨酸，并搅拌，以形成第二溶液；在50‑70min内，分6‑10次向第二溶液加入氨水，并搅拌，以形成第三溶液；将第三溶液真空脱水至预设粘度，取水样检测合格后，加入甲醇并均匀搅拌以制成低氨树脂固化剂。根据本发明的低氨树脂固化剂的制备方法，制造的低氨树脂固化剂具有热弯强度高和使用寿命长的优点。
Preparation method of low-ammonia resin curing agent and low-ammonia resin curing agent
一种低氨树脂固化剂的制备方法及低氨树脂固化剂
ZHAO MINNAN (author) / ZHANG BIN (author)
2020-11-10
Patent
Electronic Resource
Chinese
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