Methods of manufacturing foams comprising nanocellular domains
AssigneeOwens Corning Intellectual Capital, LLC
InventorMatthew Daniel Gawryla
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Abstract
A composition and method for making polymeric foam comprising nanocellular domains is provided. The nanocellular domains in the polymeric foam increase the R-value of the polymeric foam product and improve thermal insulation performance. The polymeric foam having the nanocellular domains may be formed using a carbon dioxide-based blowing agent. The polymeric foam having the nanocellular domains can be produced on production-scale equipment in amounts suitable for large-scale applications.
Claims20
A foamable polymeric mixture comprising:
- a matrix polymer;
- a domain polymer;
- and
- a blowing agent;
- wherein the foamable polymeric mixture is formed into a polymeric foam comprising foamed nanocellular domains comprising domain polymer cells with an average cell size of 1,000 nm or less.
A method of manufacturing extruded polymeric foam, the method comprising:
- introducing a composition comprising a matrix polymer into a screw extruder to form a matrix polymeric melt;
- introducing a domain polymer into the matrix polymeric melt;
- injecting a blowing agent into the matrix polymeric melt to form a foamable polymeric mixture;
- and
- extruding the foamable polymeric mixture to form an extruded polymeric foam,
- wherein the extruded polymeric foam comprises foamed nanocellular domains comprising domain polymer cells with an average cell size of 1,000 nm or less.
An extruded polymeric foam comprising:
- a foamable polymeric mixture, the mixture comprising:
- a matrix polymer;
- a domain polymer;
- and
- a blowing agent comprising carbon dioxide,
- wherein the extruded polymeric foam comprises foamed nanocellular domains comprising domain polymer cells with an average cell size of 1,000 nm or less.
Dependencies are inferred from the claim text.