Product name: N-hydroxymethyl acrylamide aqueous solution (NMA-48)
English name n-methylol acrylate
The molecular formula is CH2CHCONHCH2OH
Molecular weight: 101.1
I. product description
NMA is a special monomer with two functional groups in its molecular structure, namely vinyl and hydroxymethyl. NMA can be copolymerized with various vinyl monomers by emulsion polymerization or solution polymerization to obtain thermoplastic polymers. This kind of polymer has hydroxymethyl side groups in its macromolecular chain, which will be self-crosslinking under certain conditions, so the polymer with cross-linked structure can be obtained without additional cross-linking agent. Cross-linking of NMA copolymer can be carried out when it is dried at normal temperature. Adding catalyst or heating can improve the cross-linking speed. Various substances have been found to effectively promote cross-linking. Hydroxymethyl in NMA can react with acrylamide, alcohol, phenol, hydroquinone and phosphoric acid under certain conditions, and some reactions have been effectively utilized.
According to different needs of customers, professional chemical enterprises have produced two types of monomers: N- hydroxymethylacrylamide 48% aqueous solution (common type) and ultra-low free aldehyde N- hydroxymethylacrylamide 48% aqueous solution (ultra-low aldehyde type). Among them, the common type is convenient and economical to use, and the ultra-low aldehyde type is suitable for products with high requirements for free formaldehyde.
Second, the specifications and characteristics
NMA is an important chemical raw material, which is widely used in various synthetic polymers, such as coatings, adhesives, papermaking additives and so on. NMA has great application potential in chemical industry and scientific research.
The NMA aqueous solution is packed in plastic drums with a net weight of 200KG or 1000KG per drum.
V. Storage and use
Keep in a cool place, away from heat source and avoid strong light. Heat and light can initiate polymerization of NMA, especially in the presence of acid or metal impurities.
When the temperature of NMA aqueous solution is lower than–10℃, crystals will be produced, which can be dissolved by heating slowly in warm water bath, which does not affect the quality and performance of NMA. The storage temperature above 28℃ should be avoided as much as possible.
Even under ideal storage conditions, the storage period of NMA should not exceed three months.
The lid should not be opened when NMA solution in the barrel may be contaminated by foreign substances. The apparatus for extracting or holding NMA solution must be clean to avoid contamination by impurities, and the cover should be tightened quickly after taking one dose.
VI. Safety and Health
This product is non-flammable, non-explosive and toxic. Do not swallow or inhale. Rinse with water immediately after contact with skin.