Montedison S.p.a.

Himont Incorporated

Montecatini Tecnologie S.p.a.

Dureco Chemicals, Inc.

Paolo Corradini

Gaetano Guerra

Vittorio Petraccone

Enrico Albizzati

Vincenzo Busico

Claudio De Rosa

Claudio DeRosa

Leone Oliva

Luigi Nicolais

Giancarlo Attalla

Vincenzo M Vitagliano

Mauro Iuliano

Vito Savino

Semicrystalline manufactured articles made of syndiotactic

Articles of syndiotactic styrene polymer where the polymer is present predominantly in a new crystalline form characterized by an X-ray spectrum which presents reflections of maximum intensity at 2 .theta.of 12.2.degree. and 20.0.degree., where in the 2 .theta. range from 15.degree. to 18.degree. no reflections of appreciable intensity appear.

Articles of a new crystalline form of syndiotactic styrene polymer

This invention relates to composite manufactured articles formed by a set of uniaxially oriented isotatic polypropylene films, having a resistance to delamination of at least 0.4 kg/cm are prepared by heating under pressure a plurality of isotatic polypropylene films superimposed to each other and separated from each other by a non oriented polypropylene films. The oriented films show an orientation of the crystalline phase such as to produce X-ray scattering angles .DELTA..times. equal to or lower than 10.degree.. The non oriented film show an orientation of the crystalline phase such as to produce X-ray scattering angles higher than 20.degree., at a temperature between a temperature equal to or higher than the melting temperature, measured in non restrain conditions, of the non oriented film and a temperature lower than the melting temperature, measured in restrained conditions, of the oriented films.

Manufactured articles based on isotactic polypropylene having a highly

The invention relates to a process for the controlled polymerization of alpha-olefins selected from the group consisting of propylene and butylene in order to form a polymer containing by weight about 10% to 30% isotactic polyolefin, 25% to 70% atactic polyolefin and 0% to 65% by weight of an amorphous ethylene/olefin copolymer which process comprises combinations of the steps of:

Process for producing atactic polyolefin polymers

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Naples, Italy

Paolo Corradini