Cracow University of Technology posted this:Laboratory of Photochemistry and Optical SpectroscopyDesign and synthesis of new photoinitiators dedicated for cationic, free-radical and hybrid photopolymerization. The research are performed to improve the speed of the curing processes of polymer coatings by developing innovative polymerization photoinitiators having a very better parameters than those already used in industry. The search for more effective initiators are fully justified from the practical point of view in industry photocurable polymer coatings.
Institute of Chemical Research of Catalonia posted this:Valorization of HFC-23: trifluoromethylation reactions- clean production of trifluromethylcopper reagent - process works at room temperature and atmospheric pressure - inexpensive and abundant trifluoromethyl source - environmentally friendly process - low-cost reagents - valorization of fluoroform: a by-product of PTFE production - Versatile reagent allowing for a broad scope of reactivity
Fundació URV posted this:Environmentally friendly processing of thermosets by two-stage sequential aza-Michael addition and free-radical polymerization of amine-acrylate mixturesEnvironmentally friendly preparation of thermosets for applications on thermosensitive substrates. A two-step curing process, which consists in an Aza-Michael addition at room temperature, followed by UV radical polymerization of acrylates or methacrylates amine formulations without the need of adding solvents. The presence of amines in the structure suppress the radical inhibition by oxygen, which is a typical drawback in radical polymerizations. The invention allows leading the curing in two separate stages with a stable intermediate material, being the process controlled by the amount of amine in the formulation.
Universidad de Alcalá-OTRI posted this:New organo-metallic catalysts for the manufacture of polymersA research group from the Inorganic Chemistry Department of Alcalá University has developed a technology that presents a range of catalysts based on coordination complexes and organometallic, active in functionalization processes (expoditation, hydrosilylation) and polymerization of different organic substrates (olefins and cyclic esters). They are metal complexes belonging to the first transition groups (groups 4-6) and elements from the main groups (groups 1,2 and 13). Its application is aimed at the synthesis of materials with new properties (silicon polymers, biodegradable plastics, polyesters) and the production of small molecules with high added value, used as starting products in many industrial processes (epoxides, silanes). The group is looking for manufacturing agreements and joint venture agreements with companies from the agrofood industry, construction and petrochemicals.
Fundació URV posted this:Acrylic thermosets prepared by dual curing at room temperature fit for coatings and adhesivesFormulations for the preparation of thermosets by dual curing, at room temperature in two stages, stable over time, from the reaction of amine compounds with 2 or more N-H bonds with a vinyl compounds with a minimum of 2 double α, β- conjugated bonds to carbonyl ester groups and further polymerization of vinyl groups in excess, with completely controlled characteristics of the material at the intermediate stage.
UNIVERSIDAD DE ALICANTE posted this:New procedure for the elimination of printed ink from plastic filmThe most innovative aspects of this technology are: • The process for the removal of the ink is completely innovative and ecological, because it does not use organic solvents. • The technology has been successfully tested on different plastics, such as Polythene, Polypropylene, Polyester and Polyamide. It is viable for both water and solvent based inks.
UNIVERSIDAD DE ALICANTE posted this:New method for producing non-toxic and biodegradable nanopigmentsThis method has two stages: 1) Dispersion of, at least, an inorganic material in water. 2) Addition of, at least, an organic coloring solubilized by agitation. The following parameters might be changed in order to obtain different kinds of nanopigments: • Inorganic material concentration. • Organic coloring concentration. • pH. • Temperature. • Ionic strength. The optical response of nanopigments changes as a function of the particle size of the inorganic material (or materials) used by the diffusion. This method makes it possible to produce new hybrid nanopigments with optical and colloidal properties for tailored applications. Mainly, the customizaton of the behaviour of this materials is achieved by controlling organic/inorganic ratio in the material. The morphology of the material is hybrid (laminar/fibrillar). The organic coloring is selected among different types: azoic complexes, metallic, sulphurose, iminoquinone, antraquinone, ftalocianine, etc. In general words, they can be both natural or synthetic. Products can be used in printing inks, painting and dyes, paper, synthetic or natural fibers, polymer materials, cosmetics, etc. With this method the following features can be achieved: Color range control: Through the control over the different spectral species, the optical response is modified too, so the color range can be enlarged. Increase in the colouring power: The ability of the material for increasing the absorption on the surface is linked to three parameters. First, absorption coefficient of the nanopigment in relation to the coloring solution coefficient. Second, light dispersion caused by nanoparticles and addtiional coverage of the surface to fill. Third, reology and fisico-chemical properties of the material are able to obtain homogeneous dispersions. Environmental impact reduction: Some of the usual pigments contain heavy metals in its composition while inorganic solids used in this method are free of heavy metals and can even be used in cosmetics. Natural coloring can be combined with these nanopigments and obtain a new product which will be environmental safe.
UNIVERSIDAD DE ALICANTE posted this:Novel procedure for polymeric foams with various applications from waste plastics.The research group "Processing and Pyrolysis of Polymers", Department of Chemical Engineering at the University of Alicante has developed an innovative process that allows recycling of different types of plastics (EVA, polyethylene, polypropylene, polyurethane, polymer melt, foam, rubber or any combination thereof) to transform in a simple and economical ways products with applications in various industrial sectors. The group is looking for companies interested in acquiring the technology for commercial exploitation. Innovative aspects The inclusion of waste plastic (EVA, polyethylene, polyurethane, polypropylene, polymer melt, foam, rubber, etc. Or any combination thereof) in the composition, permits its recycling in a simple and cheap, and that current procedures are difficult and very expensive. Together with a chemical foaming and dispersion of ferrites in the composition, applies the energy necessary for the cohesion of the materials by microwave. Ferrites dispersed in the mixture capture and transmit microwaves heat required for foaming in every part of the obtained mass. With this new procedure, getting pieces of great uniformity, stability and thickness that determines the user (up to 25 cm. in diameter) at a low cost and quick way.