METHOD FOR MAKING A LOW DENSITY THERMALLY RECYCLABLE POLYMER FOAM
A 2-step processing method to form a partly cross-linked polyurethane (PU) comprising foam having densities below 600 kg/m3, preferably in the range 20-300 kg/m3, said method comprising:A first processing which comprises at least following steps:a) providing a reactive mixture comprising an isocyana...
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| creator | VERBEKE, Hugo VANEMPTEN, Erika VANROY, Bram BRIERS, David |
| description | A 2-step processing method to form a partly cross-linked polyurethane (PU) comprising foam having densities below 600 kg/m3, preferably in the range 20-300 kg/m3, said method comprising:A first processing which comprises at least following steps:a) providing a reactive mixture comprising an isocyanate composition comprising at least one isocyanate compound, an isocyanate-reactive composition comprising at least one isocyanate reactive compound, a crosslinking agent and a blowing agent composition comprising at least a heat activatable blowing agent which is heat activatable to achieve blowing at an activation temperature Tactivate, andb) allowing the reactive mixture to polymerize, optionally using a shape or mold, at a process temperature Tprocess wherein Tprocess |
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VANEMPTEN, Erika ; VANROY, Bram ; BRIERS, David</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US2024141126A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2024</creationdate><topic>AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G</topic><topic>AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING</topic><topic>CHEMISTRY</topic><topic>COMPOSITIONS BASED THEREON</topic><topic>GENERAL PROCESSES OF COMPOUNDING</topic><topic>INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS</topic><topic>MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS</topic><topic>METALLURGY</topic><topic>ORGANIC MACROMOLECULAR COMPOUNDS</topic><topic>PERFORMING OPERATIONS</topic><topic>SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR</topic><topic>SHAPING OR JOINING OF PLASTICS</topic><topic>THEIR PREPARATION OR CHEMICAL WORKING-UP</topic><topic>TRANSPORTING</topic><topic>WORKING OF PLASTICS</topic><topic>WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL</topic><topic>WORKING-UP</topic><toplevel>online_resources</toplevel><creatorcontrib>VERBEKE, Hugo</creatorcontrib><creatorcontrib>VANEMPTEN, Erika</creatorcontrib><creatorcontrib>VANROY, Bram</creatorcontrib><creatorcontrib>BRIERS, David</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>VERBEKE, Hugo</au><au>VANEMPTEN, Erika</au><au>VANROY, Bram</au><au>BRIERS, David</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>METHOD FOR MAKING A LOW DENSITY THERMALLY RECYCLABLE POLYMER FOAM</title><date>2024-05-02</date><risdate>2024</risdate><abstract>A 2-step processing method to form a partly cross-linked polyurethane (PU) comprising foam having densities below 600 kg/m3, preferably in the range 20-300 kg/m3, said method comprising:A first processing which comprises at least following steps:a) providing a reactive mixture comprising an isocyanate composition comprising at least one isocyanate compound, an isocyanate-reactive composition comprising at least one isocyanate reactive compound, a crosslinking agent and a blowing agent composition comprising at least a heat activatable blowing agent which is heat activatable to achieve blowing at an activation temperature Tactivate, andb) allowing the reactive mixture to polymerize, optionally using a shape or mold, at a process temperature Tprocess wherein Tprocess<Tactivate and Tprocess<Tmelt to form a polyurethane comprising material having a melting temperature Tmelt and which is solid at room temperature, and thenA second processing which comprises at least following steps:c) placing the polyurethane comprising material in an autoclave, pressure vessel or pressurizable mold,d) subjecting the polyurethane comprising material to a temperature sufficient to soften the polymer material (Tsoftening) wherein Tsoftening≥Tactivate in combination with an elevated pressure P1 wherein P1 is higher than atmospheric pressure (Patm), and then subsequentlye) subjecting the polyurethane comprising material to a pressure reduction which is sufficient to achieve expansion (foaming) and to obtain the partly cross-linked polyurethane comprising foam</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP |
| title | METHOD FOR MAKING A LOW DENSITY THERMALLY RECYCLABLE POLYMER FOAM |
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