Polycarbodiimides as Classification-Free and Easy to Use Crosslinkers for Water Based Coatings
Crosslinking is widely practiced in nearly all of the coatings industries to improve the performance of coatings, including wear, abrasion and chemical resistances and toughness. The improved performance originates from the formation of a continuous three-dimensional network, which may be formed by the crosslinker alone, or by reaction of the crosslinker with the binder. Stahl successfully examined the performance of polycarbodiimides as a safe and sustainable crosslinker. Read the results for different substrates and the pH and pot life effects.
A Journey to the Marine Coatings Market
This is the Story of a new ingredient used in marine coatings to prevent the growth of barnacles on ships’ hulls, thereby ensuring that vessels move through the water efficiently and smoothly. It is a story involving chemists, marine biologists and engineers, a ‘Eureka’ moment, 15 years of trials, and exhaustive regulation.
The Design of Static Mixer Heat Transfer Equipment for Adhesives, Sealants, Resins and Polymers
Understanding of the basic chemical engineering theory behind the design of heat exchangers and understanding the processes they are used for is key to their optimization. The use of static mixers in the tubes of shell and tube heat exchangers offers major benefits to adhesives, sealants, resins and polymer manufacturers in terms of equipment size, cost, operational flexibility, process control and product quality.
Performance Expectation for UV-Durable Coil Coatings
In today’s competitive environment, many companies make claims that SMP and superpolyester coatings equal or exceed the performance capabilities of 70% PVDF coatings. This white paper examines the differences between 70% PVDF coatings, SMP and super-polyestercoatings, and evaluates the true long-term performance of each coating technology.
What is Yield Stress and Why does it Matter?
Some materials can better be described as soft solids than as fluids. Strong gels and thick pastes possess an inherent structure to such a degree that they will not flow appreciably unless left for a very long time. Many less obvious robust materials also possess such a structure, albeit more delicate. One property of soft solids that will give us a more representation characterization is yield stress.
For example, open a new jar of mayonnaise and, without shaking or stirring; lay it on its side. If it hasn’t been disturbed recently it shouldn’t move noticeably over a period of a few minutes. It is safe to say that it has a very high viscosity but we can also say that under the gentle conditions here the mayonnaise is, in fact, exhibiting behavior more akin to a soft-solid than a thick liquid. Turn the jar upright again and carefully insert a large cooking spatula into it.