Clay coatings for thermoplastic polymeric resins or films
AssigneeE.I. du Pont de Nemours and Company
InventorsSteven Raymond Lustig, Eric M. Smith
Life of this patent
Estimating the term…
Abstract
A coated substrate and methods of making and using coated substrates, wherein the coated substrate comprises a coating consisting essentially of a layered mineral, a thermoplastic polymeric substrate having pendant groups receptive to said layered mineral, and wherein said pendant groups are coordinated metal groups, or are groups which can be bonded to coordinating cations or anions, or pendant groups directly receptive said layered mineral. The coated substrate is less permeable to gases, such as oxygen and carbon dioxide.
Claims19
A coated substrate, comprising a thermoplastic polymeric substrate having pendant groups receptive to a layered mineral, and a coating consisting essentially of the layered mineral, wherein said pendant groups are coordinated metal groups or are groups which can be bonded to coordinating cations or anions or pendant groups which are directly receptive to the layered mineral.
A method for making a coated substrate comprising a thermoplastic polymeric substrate and a coating consisting essentially of a layered mineral, comprising:
- contacting a substrate comprising a thermoplastic polymer having pendant groups receptive to the layered mineral with a colloidal solution or a colloidal suspension consisting essentially of the layered mineral and a dispersant, wherein the pendant groups receptive to the layered mineral are metal coordinated groups or are groups which can be bonded to coordinating cations or anions or pendant groups which are directly receptive to the layered mineral.
A method of reducing the gas permeablility of a thermoplastic polymeric substrate, comprising:
- applying a coating consisting essentially of a layered mineral to a thermoplastic polymeric substrate having at least one surface functionalized with pendant groups receptive to the layered mineral, wherein the pendant groups are metal coordinated groups or are groups which can be bonded to coordinating cations or anions or pendant groups which are directly receptive to the layered mineral.
A method for packaging a liquid in a molded biaxially oriented polymeric container, comprising the steps of:
- forming a container from a thermoplastic polymeric substrate having pendant groups receptive to a layered mineral, wherein the pendant groups are metal coordinated groups or are groups which can be bonded to coordinating cations or anions or pendant groups which are directly receptive to the layered mineral;
- applying a coating consisting essentially of the layered mineral to at least one surface of said container;
- introducing a liquid into the container;
- and
- sealing the container.
Dependencies are inferred from the claim text.