Reversibly cross-linkable resin

Patent metadata

Field	Value
Publication number	US-2018044495-A1
Application number	US-201715796993-A
Country	US
Kind code	A1
Filing date	Oct 30, 2017
Priority date	Jun 24, 2014
Publication date	Feb 15, 2018
Grant date	—

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

1 . A method of manufacturing extruded reversibly cross-linkable polymeric foam 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 reversibly cross-linkable 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, forming 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 otherwise identical polymeric foam that does not include the cross-linking agent polymerized with the first polymeric material.

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, a-methylstyrene, ethylstyrene, vinyl benzene, vinyl toluene, chlorostyrene, and bromostyrene.

4 . The method of claim 1 , wherein said cross-linking agent comprises a metal-ligand complex ion.

5 . The method of claim 1 , wherein said metal-ligand complex ion includes a hydroxyl-containing (meth)acrylate.

6 . The method of claim 1 , wherein said ligand is at least one of a polyester (meth)acrylate and a polyurethane (meth)acrylate.

7 . The method of claim 1 , wherein said metal-ligand complex comprises a terpyridine ligand reacted with a metal ion.

8 . The method of claim 1 , wherein said cross-linking agent comprises one or more of furan-maleimide moieties, cyclopentadiene moieties, anthracene-maleimide pendent groups.

9 . The method of claim 1 , wherein said reversibly cross-linkable foamable material is formed by multiple hydrogen bonds.

10 . The method of claim 1 , wherein said reversibly cross-linkable foamable material is formed by a hybrid covalent/non-covalent system.

11 . 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.

12 . The method of claim 11 , 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.

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

14 . A reversibly cross-linkable foamable mixture comprising:
a first polymeric material and; at least one cross-linking agent copolymerized with said first polymeric material, wherein said reversibly cross-linkable foamable mixture is thermally stable at temperatures of at least 10 degrees Celsius higher than otherwise identical polymeric foam that does not include the cross-linking agent copolymerized with the first polymeric material.

15 . The reversibly cross-linkable foamable mixture of claim 14 , 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.

16 . The reversibly cross-linkable foamable mixture of claim 15 , 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.

Assignees

• Owens Corning Intellectual Capital Llc

Inventors

• Gawryla Matthew Daniel

Classifications

• C08J3/24

  Crosslinking, e.g. vulcanising, of macromolecules (mechanical aspects B29C35/00; crosslinking agents C08K) · CPC title

• C08J9/146

  only fluorine as halogen atoms · CPC title

• C08J2201/026

  Crosslinking before of after foaming · CPC title

• C08J9/0019

  halogenated · CPC title

• C08J9/0061

  characterized by the use of several polymeric components · CPC title