CAS：110-26-9|Application of N,N'-Methylenebisacrylamide in Sanitary Products

Product Name/English Name：N,N'-Methylenediacrylamide
CAS：110-26-9
Molecular Formula：C7H10N2O2
Article No.：J0008
Structural Formula：

Product Introduction
N,N'-Methylenediacrylamide is a widely used crosslinking agent with stable quality, high purity, and good performance. It belongs to the thickening agent and adhesive of acrylamide. It is used in Textile manufacturing to produce thickening agent and adhesive, in oil exploitation to produce plugging agent. It is also widely used in various fields such as leather chemicals and printing.
Application of N,N'-Methylenediacrylamide
Diapers are a commonly used sanitary product. Generally speaking, diapers are composed of three main parts: a surface layer, an absorbent core layer, and a bottom cloth. The wrapping layer is tightly attached to the baby's body, which can promote rapid penetration of urine and effectively prevent backflow, keeping the surface of the diaper dry. The main function of the absorption core layer is to quickly absorb urine, disperse urine, and store urine. The absorption core layer is a water absorbing filler, but the existing water absorbing filler cannot meet the absorption of adult urine. Therefore, the CN116139325A patent provides a high water absorption filler and its preparation method for adult diapers, which solves the problem of average absorption speed of urine and inability to remove irritating odors in urine at present. The specific preparation method is as follows:
Step 1: Evenly mix polyvinyl alcohol fiber, Glycidyl methacrylate and deionized water, stir and add Ceric ammonium nitrate at the speed of 200r/min and the pH value of 3, and stir for 4h to prepare reinforced fiber;
Step 2: Clean the rice husks with deionized water, add sodium hydroxide solution, stir for 7h at the speed of 150r/min and the temperature of 65℃, add nitrogen protection, add Potassium persulfate, stir for 10min, add acrylic acid, N, N-methylenebisacrylamide and modified additives, and wash with deionized water after 2h of reaction to prepare pretreatment materials;
Step 3: disperse pre-treatment materials, reinforced fillers and reinforced cellulose in deionized water, add Diethylenetriamine, react for 8h at the speed of 60r/min and pH value of 10, filter and remove the filtrate, dry the substrate, and prepare super absorbent filler.
Compared with existing technologies, the present invention prepares high water absorption fillers through processes such as free radical polymerization, grafting polymerization, and amino reaction. The addition of modification additives forms a spiral shaped polyacrylic acid molecule coating on the surface of rice husk fibers, which can accelerate the water absorption rate of the material and achieve good water locking effect, thereby ensuring the dryness of the diapers. The structure also contains zirconium based zeolites and porous spiral structures, Can absorb the ammonia odor emitted by urine.

References
CN116139325A  A high water absorbing filler for adult diapers and its preparation method.