Physical and Chemical Properties | Cationic polymer, light yellow viscous liquid. This product is slightly acidic and can be mixed in any ratio of cold and hot water. It can be mixed with non ionic and cationic additives for use. It can form insoluble salts with dye anions, generate color lakes on fibers, and increase the molecular weight of dyes, making them difficult to dissolve in water, thereby improving dyeing fastness. |
Use | This product is a fixing agent suitable for reactive dyes. |
This product is non-toxic and irritating to contact with skin and mucous membranes. Storage and transportation of general chemicals.
This product is a cationic polymer, using two monomers: methyldiallylamine and dimethyldiallylammonium chloride. Copolymerization is carried out using 2,2-azobis (2-methylpropioximic acid) as the initiator.
1. Synthesis of Methyldiallylamine
Add a certain amount of methylamine solution to the stirred reactor, and add allyl chloride in a certain proportion to the reactor. Control the feeding time between 10-20 minutes. Control the entire reaction temperature at 60-80 ℃ and the reaction time for 1-3 hours. When the pH value of the reaction mixture is neutral, the reaction ends. Distill the product to obtain high-purity methyldiallylamine. Adjust the pH value to 6 with hydrochloric acid to obtain methyldiallylamine hydrochloride.
2. Synthesis of Dimethyldiallylammonium Chloride
Add a certain amount of dimethylamine solution to the reaction kettle, alternately add allyl chloride and 50% alkali solution, control the pH value of the reaction mixture to be 12-14, control the feeding time to be 4-6 hours, and control the reaction temperature to be 5-10 ℃. After the dripping is completed, raise the reaction temperature to 42-46 ℃ and reflux for about 0.5h. The reaction ends when the pH value of the reaction mixture reaches 6.0-6.5. Subsequently, the excess reactants and by-products were evaporated, and sodium chloride was separated by centrifugation to obtain the dimethyl diallyl ammonium chloride monomer.
3. Aggregation
Add the above two monomers in a certain proportion to the reaction kettle, adjust to the required concentration with water, and initiate polymerization by adding a certain amount of initiator at 60 ℃. The polymerization temperature is 50-80 ℃, and the reaction time is 48 hours. After cooling the polymer, it is diluted to obtain the finished product.