Ausimont

Montedipe

Ecp Enichem Polimeri S.r.l.

Montedipe S.r.l.

Gianflavio Lunardon

Lino Credali

Carlo Mulas

Bruno Gallo

Ermanno Benetti

Luciano Ciriello

Corrado Cecchini

Vito Cancellier

A process for preparing formed articles made of polyurethane foams, which comprises reacting at least a polyisocyanate with at least a compound containing end activated hydrogens in the presence of an expanding medium, selected from at least a hydrofluoroalkane and/or perfluoroalkane, and of a product, containing at least a structural unit of the aminic type, chemically bound or present in free form in one of the two polyurethane reagents, said expanding medium being dissolved in said one of the two polyurethane reagents.

Process for preparing formed articles made of polyurethane foams and

Flexible polyurethane foams having bulk densities within the range of from 15 to 60 kg/cm.sup.3 and a load bearing capacity, under a compression rate of 40%, higher than 50 N, obtained by the reaction of a modified polyisocyanate with a compound containing activated hydrogen atoms in chain-end position, and wherein agents different from chloro-fluoroalkanes are used as the foaming agent.

Flexible polyurethane foams and process for preparing them

Polyisocyanate compositions and their use in the preparation of flexible

A thermoplastic polyurethane endowed with improved heat distortion resistance, which comprises the product of reaction of

Thermoplastic polyurethane endowed with improved characteristics of

The invention concerns a process for the manufacture of thermoplastic polyurethanes wherein an organic polyisocyanate is made to polymerize with a polyol (reactive with same isocyanate) in the presence of a chain extending agent having a molecular weight lower than 400, under continuous stirring, at a temperature higher than 150.degree. C. and for a time sufficient to obtain a product having a melt flow index lower than 25 g/10'.

Process for the manufacture of thermoplastic polyurethanes

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Padua, Italy

Gianflavio Lunardon