At present domestic and foreign textiles with a few kinds of aldehyde-free color fixing agent structure, the following Enrich chemical guide us understand what kinds of aldehyde-free color fixing agent structure.

1, cationic resin type color fixing agent

Fixing agents DFRF-1 and SH-96.

2. Reactive color fixing agent of amine and epichlorohydrin condensate

Commonly used dimethylamine, diethylenetriamine and epichlorohydrin condensation, is currently the domestic market to use more, manufacturing is very convenient, color fastness is not very good non-aldehyde fixative, not up to the requirements of customers.

3. Quaternary ammonium salt color fixing agent

It is condensed from fatty amine and quaternary ammonium salt etherifying agent

4, quaternized reactive color fixing agent

The reaction of diethylenetriamine with epichlorohydrin was followed by etherification with quaternary ammonium salt. Quaternary ammonium salt was introduced into the reactive color fixing agent.

5, quaternary ammonium polymer aldehyde-free color fixing agent

Polymers (homopolymers, or copolymers with other monomers) are formed by polymerization of an alkene with a quaternary ammonium salt, such as monoallyl dimethyl ammonium chloride and diallyl dimethyl ammonium chloride (DMDAAC).Color fixation is achieved by cationic groups and film formation.For example, the fixing agent CS of Beijing Oilfield Chemical Company, the fixing agent RF of Yongli Chemical Company, and the fixing agent DUR of Shanghai Additives Factory belong to this kind of copolymer.

6. Polyether reactive color fixing agent

Compounds containing hydroxyethyl and hydroxyl groups, such as polyethanolamine and polyhydroxy naphthalene, are condensed into polyethers in the presence of a catalyst.This polyether can react with epichlorohydrin to form reactive color fixing agents, such as the domestic color fixing agent TX.

7. Polycarboxylic acid reactive color fixing agent

Polycarboxylic acids such as citric acid and methane tetrachloride (BTCA) are condensed into polyester in the presence of catalyst. This is a new type of anti-shrinkage and anti-wrinkle agent. If the polyester is condensed with epichlorohydrin, it can be made into a reactive color fixing agent that can cross-link with cellulose molecules and reactive dyes.

8, dicylamine and diethylenetriamine condensate fixing agent

Dicyandiamide and divinyl three amine at 180 ℃ condensation polymer formaldehyde-free fixing agent, can further and epoxy chloropropane condensation, become a fixing agent of reactive groups, between the cellulose molecules and its gravity is bigger, especially with cellulose molecules to form hydrogen bonding, so as to improve the effect of the solid color, but when dosage of dicyandiamide, often causes.

9. Diaminomethacrylate quaternary ammonium salt polymer color fixing agent

The quaternary ammonium salt of dialkylaminomethacrylate can be polymerized into high polymers in the presence of initiator. It is an aldehyde-free color fixing agent with cationic groups.Similar to allyl quaternary ammonium polymer (homopolymer, or copolymer with other acrylates).