Ppg Industries, Inc.

Ppg Industries Ohio, Inc.

Ppg Incustries, Inc.

Leland H Carlblom

Ken W Niederst

Jerome A Seiner

David C Kapp

Mildred L McKinley

Donald B Jones

Russell E Boston

Jess A Kozma

Paul S Chirgott

Cynthia Kutchko

Stephen G McQuown

Terri Lynn Ziegler

Amine dispersants are disclosed. Also disclosed are organic dispersions that comprise ultrafine particles and an amine dispersant. The amine dispersant is the Michael addition product of reactants that include (a) a polyether (meth)acrylate and (b) a polyamine. Also disclosed are coating compositions that comprise such dispersions and substrates at least partially coated with such coating compositions.

Amine dispersants, organic dispersions and related coating compositions

Gas barrier coating compositions are provided which include a polyamine component, a polyepoxide component and a hydroxy-substituted aromatic compound that is present in an amount sufficient to provide a gas barrier coating having an oxygen permeability less than or equal to 75 percent of the oxygen permeability of the same composition without a hydroxy-substituted aromatic compound. Also provided is a multi-layer packaging material having at least one gas permeable packaging material layer and at least one gas barrier material layer formed from the gas barrier coating composition. Sealable containers are also provided.

Gas barrier coating of polyamine, polyepoxide and hydroxyaromatic compound

Disclosed is a multilayer packaging material which is suitable for use as a container for malt beverages and which is tinted so as to block at least 90% of light with wavelengths of electromagnetic radiation ranging from 300 nm to 500 nm. The tinted multilayer packaging materials of the present invention includes: (a) at least one layer of a carbon dioxide (CO.sub.2)-permeable polymeric packaging material, and (b) at least one layer of a CO.sub.2 -treated gas barrier coating, which has an oxygen permeability constant not more than 0.05 cubic centimeter-mil/100 square inches/atmosphere/day. The CO.sub.2 -permeable packaging material can be any polymeric material through which CO.sub.2 can pass and which can be used as a packaging material for food or beverages. The gas barrier coating has an oxygen permeability constant, before CO.sub.2 treatment, of less than 0.3. This gas barrier coating includes the reaction product of a polyamine (A) and a polyepoxide (B). The polyamine (A) can be an initial polyamine or an ungelled polyamine adduct having active amine hydrogens. Polyepoxide (B) can be a polyepoxide having a plurality of glycidyl groups linked to an aromatic member.

Multilayer packaging material having aminoepoxy gas barrier coating

Disclosed is a gas barrier coating and multilayer packaging materials made therefrom. The gas barrier coating includes a polyamine (A), a polyepoxide (B), and a filler (C). Polyamine (A) includes at least one of the following: (a) an initial polyamine, and (b) an ungelled polyamine adduct which is the reaction product of the initial polyamine and epichlorohydrin and/or a polyepoxide having a plurality of glycidyl groups linked to an aromatic member. Polyepoxide (B) includes a polyepoxide having a plurality of glycidyl groups linked to an aromatic member. Filler (C) includes a platelet-type filler with the following particle size distribution: (a) a number mean particle diameter in the range from about 5.5 to about 15 microns, and (b) a volume mean particle diameter in the range from about 8 to about 25 microns. In addition, the present invention provides glossy, multilayer packaging materials containing an oxygen barrier material layer having an oxygen permeability constant not more than 0.05 in cubic centimeter-mil/100 square inches/atmosphere/day at 30.degree. C. and 50% R.H. The glossy, multilayer packaging material includes: (a) at least one layer of a substrate material, and (b) at least one layer of the gas barrier material described above.

Gas barrier coating compositions containing platelet-type fillers

The present invention provides an apparatus for controlling the spray of positively-charged coating particles towards a grounded or negatively-charged dielectric material having a dielectric constant less than 4.0 and in the form of a hollow container. This apparatus includes: (a) a device for inducing a positive charge onto a coating composition, (b) a device for creating a field of positively-charged coating particles, (c) a device for supporting a series of hollow containers in spaced relation to one another which includes a series of vertically-oriented spindles, (d) a device for transporting the spindles in series through the field of positively-charged coating particles, (e) a gripping chuck made from, or coated with, a dielectric material, or both, mounted to the upper end of a spindle, the chuck having a recess defined therein for receiving the opening of a hollow container, and (f) a grounding device positioned such that, when the dielectric container is in the path of the sprayed, positively-charged coating particles the grounding device is also in the path but shielded therefrom by the dielectric material. The grounding device is insulated from direct electrical contact with the supported container. The grounding device can be replaced by an internal charging device for inducing a negative charge onto a hollow container being supported by the gripping chuck. Moreover, the grounding device or the internal charging device can be used in conjunction with an external charging device for inducing a negative charge onto a hollow container being supported by the gripping chuck.

Electrostatic deposition of charged coating particles onto a dielectric

Multilayer packaging material for oxygen sensitive food and beverage

This invention provides a process for electrostatically applying a coating composition onto dielectric materials which have a dielectric constant less than 4.0. In this process, a positive charge is induced onto a coating composition. The dielectric material is electrically isolated, negatively charge, or both. The positively-charged coating composition is sprayed onto the dielectric material. If the dielectric material is charged negatively, the process of the present invention further includes the step of maintaining at least a portion of the negative charge on the dielectric material while positively-charged coating particles are being sprayed thereon.

Polyepoxide-polyamine gas barrier coatings for use on packaging materials such as polymeric containers are provided with low permeability at relatively low amine to epoxy cure ratios by including substantial aryloxy or aryloate group content. The aryloxy or aryloate content may be provided, for example, by polyglycidyl ether of resorcinol or polyglycidyl ester of phthalic acid.

Epoxy-amine barrier coatings with aryloxy or aryloate groups

Disclosed herein is a coating composition for coloring transparent containers such as glass bottles, the composition comprising a combination of a film-former such as an acrylic resin, a metal-free polymeric dye reactive with the resin, an adhesion promoter (and optionally an ultraviolet light absorber). Also disclosed are a method of coating containers with such a composition and the resulting product.

Coatings and method for coloring light-transmitting containers

Disclosed herein is a combination of a film-former, a metal-free, reactive colorant, ultraviolet light absorber and an adhesion promoter in an effective combination to substantially block transmission of light through a container in order to reduce lightstruck phenomenon.

Coatings for the protection of products in light-transmitting containers

Films of low gloss may be obtained by exposing to ultraviolet light coatings of a composition comprising photoinitiator, photosensitizer, quencher and compound having a plurality of acrylyloxy groups.

Growing community of inventors

Richland, PA, United States of America

Leland H Carlblom