Reversibly cross-linkable resin

Patent metadata

Field	Value
Publication number	US-10450434-B2
Application number	US-201715796993-A
Country	US
Kind code	B2
Filing date	Oct 30, 2017
Priority date	Jun 24, 2014
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

Reversibly cross-linkable foam is provided. The reversibly cross-linked foam includes a first polymeric material, at least one reversibly cross-linkable monomer polymerized with the first polymeric material, and at least one blowing agent. The reversibly cross-linkable co-polymeric foam is thermally stable at temperatures of at least 10 degrees higher than otherwise identical polymeric foam that does not include the reversibly cross-linkable agent polymerized with the first polymeric material.

First claim

The invention claimed is:

1. A method of manufacturing extruded reversibly cross-linkable polymeric foam, the method comprising:
introducing a foamable polymeric composition into an extruder to form a polymer melt, said foamable polymeric composition comprising:
a first polymeric material and;
at least one reversible cross-linking agent polymerized with said first polymeric material, forming a reversibly cross-linkable copolymer;

injecting at least one blowing agent into said reversibly cross-linkable copolymer to form an extrusion composition; and
extruding said extrusion composition to produce a reversibly cross-linkable foam, wherein said reversibly cross-linkable foam is thermally stable at temperatures of at least 10 degrees Celsius higher than an otherwise identical polymeric foam that does not include the cross-linking agent polymerized with the first polymeric material,
wherein said reversible cross-linking agent comprises a metal-ligand complex ion that comprises a terpyridine ligand reacted with a metal ion.

2. The method of claim 1 , wherein said first polymeric material comprises an alkenyl aromatic polymer.

3. The method of claim 2 , wherein said alkenyl aromatic polymer is derived from one or more of styrene, α-methylstyrene, ethylstyrene, vinyl benzene, vinyl toluene, chlorostyrene, and bromostyrene.

4. The method of claim 1 , wherein said reversibly cross-linkable copolymer is further blended with a second polymer material prior to or during formation of said reversibly cross-linked foam.

5. The method of claim 4 , wherein said second polymer material is one or more of alkenyl aromatic polymers, polyvinyl chloride (“PVC”), chlorinated polyvinyl chloride (“CPVC”), polyethylene, polypropylene, polycarbonates, polyisocyanurates, polyetherimides, polyamides, polyesters, polycarbonates, polymethylmethacrylate, polyphenylene oxide, polyurethanes, phenolics, polyolefins, styrene acrylonitrile (“SAN”), acrylonitrile butadiene styrene, acrylic/styrene/acrylonitrile block terpolymer (“ASA”), polysulfone, polyphenylene sulfide, acetal resins, polyaramides, polyimides, polyacrylic acid esters, copolymers of ethylene and propylene, copolymers of styrene and butadiene, copolymers of vinylacetate and ethylene, rubber modified polymers, thermoplastic polymer blends, and combinations thereof.

6. The method of claim 2 , wherein said blowing agent includes one or more of an HFO, HFC, HCFO, and CO 2 .

Assignees

• Owens Corning Intellectual Capital Llc

Inventors

• Gawryla Matthew Daniel

Classifications

• C08J2201/03

  Extrusion of the foamable blend · CPC title

• C08J9/0061

  characterized by the use of several polymeric components · CPC title

• C08K5/0025

  Crosslinking or vulcanising agents; including accelerators · CPC title

• C08J2205/052

  Closed cells, i.e. more than 50% of the pores are closed · CPC title

• C08J9/146

  only fluorine as halogen atoms · CPC title