Oxazolidines as Latent Curing Agents

Tuesday, October 18, 2011

Reactive Diluents yield superior quality Polyurethane Coatings

I found a large number of formulators get bewildered from an issue: how to come out with a high-solids polyurethane system with low viscosity for feasible application, along with excellent performance after curing process since voc component in paints and coatings became the major target of regulations.

There is a definite answer to this query is the use of low molecular weights polyols to deliver a lower viscosity formulation that requires less solvent. Unfortunately, these reductions in molecular weight sometimes lead to systems that cure very quickly and fail to perform well in the field. These polyols pose a threat related to high intrinsic viscosities without reductions in molecular weight which in turn makes it extremely difficult to extract solvent from the formulation.

Now discuss the other side of the system. Reactive diluents are low viscosity to reactants that are developed particularly to reduce VOCs with the help of a reaction with the polymer matrix. They are very much similar to solvents as they bring down polymer viscosity, but they do so without up scaling VOCs. Reactive diluents typically take the form of blocked or delayed sources of active hydrogen. For example – Aldimines and ketimines are blocked amino compounds. Oxazolidines are also a part of blocked amino alcohols.

Epoxy Curing Agents – Developed for floor and wall coatings

The epoxy curing agents are widely used to emulsify and harden both liquid and solid epoxy resins, resulting into tough and durable polymers. There are various applications where these curing agents are used including concrete polymers/sealers, industrial & decorative concrete floor coatings, wall coatings, high build self-leveling floor coatings, epoxy modified cements, and anti-corrosive primers.

There are many companies involved into manufacturing of epoxy curing agents and waterborne polyurethane dispersions. Numbers f businesses involved in coatings, sealants, elastomers, and adhesives need these agents for various purposes.
Before finalizing a particular supplier for these agents, make sure to carry out a comprehensive and extensive market research on all the available options. The best way to do research is to search for them on internet as it the most reliable and feasibly available option to people. Today almost each supplier has its own website where you can browse through his complete range of products.

Searching for and buying for these epoxy curing agents is very easy as you can simply do it from your office cabin. Even you can seek an expert’s advice in case you found difficulty in choosing a particular agent. The goodwill of the supplier you choose is the primary thing responsible for quality.