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A technology of PAE wet strength agent and polyamide polyamine, applied in the field of papermaking auxiliaries, can solve the problem of not providing detection methods, and achieve the effects of improving absorbency, maintaining stability and improving conversion rate
Active Publication Date: 2020-07-28
ZHEJIANG TRANSFAR WHYYON CHEM
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Problems solved by technology
The national standard GB/T 36420-2018 stipulates the limited content of absorbable halides in tissue
Method used
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Embodiment 1
[0032] Add 89.7g of tallow to a stainless steel reaction kettle with the conditions of weighing, heating, cooling, nitrogen protection, stirring, temperature, pressure indication, and feeding, replace with nitrogen, start stirring, heat up to 140°C, and vacuum to 5kPa And kept for 15 minutes, the constant weight in the kettle was 88.5g (about 0.1mol). Inflate nitrogen to a slight positive pressure, add 155g (1.5mol) of diethylenetriamine dropwise, raise the temperature to 140°C and stir and mix for 2 hours, then raise the temperature by 10°C per hour until 170°C, keep it warm for 2 hours to obtain a long-chain alkane-chain amido secondary amine compound. Add 190.1 g (1.3 mol) of adipic acid, fill with nitrogen to slightly positive pressure, and keep the reaction at 170°C for 4 hours. Stop heating, add 742 g of hot deionized water to dilute the reaction material to a solid content of 35%, which is the polyamide polyamine intermediate, and cool to room temperature. Add 37g of ...
Embodiment 2
[0034] In a stainless steel reaction kettle with conditions such as weighing, heating, cooling, nitrogen protection, stirring, temperature, pressure indication and feeding, add 81g of palm oil, replace with nitrogen, start stirring, raise the temperature to 140°C, evacuate to 5kPa and Keep it for 15 minutes, and the constant weight in the kettle is 80.3g (about 0.1mol). Inflate nitrogen to a slight positive pressure, add 155g (1.5mol) of diethylenetriamine dropwise, raise the temperature to 140°C and stir and mix for 2 hours, then raise the temperature by 10°C per hour until 170°C, keep it warm for 2 hours to obtain a long-chain alkane-chain amido secondary amine compound. Add 190.1 g (1.3 mol) of adipic acid, fill with nitrogen to slightly positive pressure, and keep the reaction at 170°C for 4 hours. Stop heating, add 742 g of hot deionized water to dilute the reaction material to a solid content of 35%, which is the polyamide polyamine intermediate, and cool to room temper...
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Abstract
The invention discloses a preparation method of a PAE wet strength agent. The method comprises the following steps: carrying out transesterification on grease and an alkenyl amine derivative to form along-alkyl-chain amido secondary amine compound, adding binary acid or corresponding binary ester, carrying out a polycondensation reaction to form polyamide polyamine, and adding water into the produced polyamide polyamine to form an aqueous solution of a polyamide polyamine intermediate; and adding a solvent into the aqueous solution at room temperature, slowly adding epoxy chloropropane, carrying out reacting for a period of time, then performing heating to 40-90 DEG C, carrying out reacting for a period of time, adding an organic acid to terminate the reaction, and adding water for dilution to obtain the PAE wet strength agent with a solid content of 20-40%. According to the invention, by additionally adding the grease, the PAE wet strength agent is allowed to contain the long-alkyl-chain amido compound, and a non-binding region is formed locally, so the absorbability of paper products is improved; and the solvent is added in a crosslinking stage, so the conversion rate of epoxy chloropropane is increased, and a final product can be kept stable under the condition of a higher solid content.
Description
technical field [0001] The invention belongs to the technical field of papermaking auxiliary agents, and relates to a preparation method of a PAE wet strength agent with improved absorption, high solid content and no excess of epichlorohydrin. Background technique [0002] Untreated fiber products will lose 95%-97% of their strength after being exposed to water. Most paper products are easily damaged after being exposed to water. The solution is to use a wet strength agent. [0003] The application field of wet strength agent is very wide, including paper bags, outdoor posters, packing boxes, napkins, handkerchiefs, paper towels, kitchen paper, food packaging, filter paper, blueprint paper, photo paper, map paper, etc. After the wet strength agent is added to the paper product, it has higher strength under high humidity and is less prone to deformation. [0004] Materials used as wet strength agents can be urea-formaldehyde resin, melamine-formaldehyde resin, ethylene-vinyl...
Claims
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Application Information
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