Facile synthesis and characterisation of covalently coloured polyurethane latex

TRADELABOR has more than 20 years of experience in the control and treatment of air, working with an experienced and qualified technical staff and with the most advanced technology in this area, which together guarantee the quality of the services provided.

 

 

A new method to prepare covalently coloured polyurethane latex has been developed based on the polymerisation of dye monomers.

In a recent work, a new method for facile synthesis of covalently colored polyurethane latex was developed. A series of blue dye monomers were synthesised via one-step reaction of a reactive dye and amino compounds, and then employed as chain extenders to react with polyurethane prepolymer in the emulsification process to prepare the covalently coloured polyurethane latexes.

The chemical structures and the properties of dye monomers and the corresponding polymers were investigated, and the UV–Vis spectra of covalently colored polyurethane featured fairly consistent with dye monomers with maximum absorption wavelength at 620 nm and 580 nm, since the chemical structure of chromophore maintained unchanged.

Light fastness of the covalently colored latex film was greatly promoted

The conversion of dye monomer reached more than 92% with 1.0 wt% dye content, whereas the conversion decreased with the increase of the dye amount and the adding time. Compared with the noncovalently latex film, the light fastness of the covalently colored latex film was greatly promoted due to the chemical bonding of chromophores with polymer matrix.

Continue at: https://www.european-coatings.com/Raw-materials-technologies/Technologies/Facile-synthesis-and-characterisation-of-covalently-coloured-polyurethane-latex/(cpg)/LA0093?cpg=LA0093&utm_source=newsletter&utm_medium=email&utm_campaign=EC-NL-2019-05-17&utm_content=Facile-synthesis-and-characterisation-of-covalently-coloured-polyurethane-latex&uid=678731

Manostaxx
Manostaxx

 

http://www.manostaxx.com

 

 

Leave a Reply

Your email address will not be published. Required fields are marked *