Abstract: In-mold labels comprise a printed sheet and a “cover stock” layer that covers the printed sheet and also provides adhesion of the label to the mold prior to the molding procedure. The cover stock is prepared from a blend of a major portion of polymer composition having a high melting point and a lesser amount of a polyolefin having a low melting point. The high melting point polymer composition must contain an ethylene-vinyl acetate (EVA) copolymer having a melting point of greater than 85° C. The cover stock is characterized by having a non-homogeneous morphology in which discrete “islands” of the high melting point polymer are present in a continuous “sea” of the polyolefin. The labels of this invention are especially suitable for applying labels to a rotomolded part. The cover stock melts during the rotomolding process to provide a protective cover for the label graphics.

Abstract: In-mold labels comprise a printed sheet and a “cover stock” layer that covers the printed sheet and also provides adhesion of the label to the mold prior to the molding procedure. The cover stock is prepared from a blend of a major portion of polymer composition having a high melting point and a lesser amount of a polyolefin having a low melting point. The high melting point polymer composition must contain an ethylene-vinyl acetate (EVA) copolymer having a melting point of greater than 85° C. The cover stock is characterized by having a non-homogeneous morphology in which discrete “islands” of the high melting point polymer are present in a continuous “sea” of the polyolefin. The labels of this invention are especially suitable for applying labels to a rotomolded part. The cover stock melts during the rotomolding process to provide a protective cover for the label graphics.

Abstract: A blend of ethylene homopolymers contains at least one blend component having a very low molecular weight and a narrow molecular weight distribution. The blend has surprisingly high density and low hexane extractables. The blend is suitable for the manufacture of a wide variety of plastic goods including extruded goods and molded goods. Plastic film prepared from the blends of this invention have a low Water Vapor Transmission Rate (“WVTR”).

Abstract: In-mold rotomolding labels comprise a printed sheet and a “cover stock” layer that covers the printed sheet and also provides adhesion of the label to the mold prior to the rotomolding procedure. The cover stock is prepared from a high melting polyethylene and a low melting polyolefin and is characterized by having a non-homogeneous morphology in which discrete “islands” of the polyethylene are present in a continuous “sea” of the polyolefin. The cover stock melts during the rotomolding process to provide a protective cover for the label graphics.

Abstract: A solution polymerization process using a phosphinimine catalyst and a boron activator is conducted at a temperature of about 170° C. or greater in the presence of trialkyl aluminum to produce polyethylene having a comparatively broad molecular weight distribution. The polyethylene product produced by the process of this invention is desirable because it can provide enhanced “processability” in comparison to polyethylene having a narrow molecular weight distribution. The process of this invention is advantageous in comparison to prior art processes for the preparation of “broad” polyethylene which use two polymerization reactors and/or more than one polymerization catalyst. The polymers produced by the process of this invention are potentially suitable for the preparation of plastic film. For example, a polyethylene according to this invention and having a density of about 0.

Abstract: A solution polymerization process using a phosphinimine catalyst and a boron activator is conducted at a temperature of about 170° C. or greater in the presence of trialkyl aluminum to produce polyethylene having a comparatively broad molecular weight distribution. The polyethylene product produced by the process of this invention is desirable because it can provide enhanced “processability” in comparison to polyethylene having a narrow molecular weight distribution. The process of this invention is advantageous in comparison to prior art processes for the preparation of “broad” polyethylene which use two polymerization reactors and/or more than one polymerization catalyst. The polymers produced by the process of this invention are potentially suitable for the preparation of plastic film. For example, a polyethylene according to this invention and having a density of about 0.

Abstract: This invention is a solution process for the preparation of high molecular weight ethylene copolymers comprising contacting olefin monomers, with a catalyst system at a polymerization temperature at or above about 80° C. with a catalyst system comprising an unbridged Group 4 metal compound having a monocyclopentadienyl ligand, a phosphinimine ligand and at least one uninegative, activation reactive ligand. The process can be practiced at a reaction temperature of at least 80° C. to obtain high number average molecular weight polymer.

Abstract: This invention is a solution process for the preparation of high molecular weight ethylene copolymers comprising contacting olefin monomers, with a catalyst system at a polymerization temperature at or above about 80.degree. C. with a catalyst system comprising an unbridged Group 4 metal compound having a monocyclopentadienyl ligand, a phosphinimine ligand and at least one uninegative, activation reactive ligand. The process can be practiced at a reaction temperature of at least 80.degree. C. to obtain high number average molecular weight polymer.