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 DeRosa

Leone Oliva

Claudio De Rosa

Giancarlo Attalla

Vincenzo M Vitagliano

Mauro Iuliano

Vito Savino

Luigi Nicolais

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