IE37971B1 - Process for linearising cross-linked polymers with polyisocyanates - Google Patents

Process for linearising cross-linked polymers with polyisocyanates

Info

Publication number
IE37971B1
IE37971B1 IE1325/73A IE132573A IE37971B1 IE 37971 B1 IE37971 B1 IE 37971B1 IE 1325/73 A IE1325/73 A IE 1325/73A IE 132573 A IE132573 A IE 132573A IE 37971 B1 IE37971 B1 IE 37971B1
Authority
IE
Ireland
Prior art keywords
polyurethane
linearized
groups
cross
macropolyisocyanates
Prior art date
Application number
IE1325/73A
Other versions
IE37971L (en
Original Assignee
Bayer Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayer Ag filed Critical Bayer Ag
Publication of IE37971L publication Critical patent/IE37971L/en
Publication of IE37971B1 publication Critical patent/IE37971B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
    • C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
    • C08J11/28—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic compounds containing nitrogen, sulfur or phosphorus
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1422884 Polyurethanes BAYER AG 3 Aug 1973 [5 Aug 1972] 36958/73 Heading C3R Polyurethanes which are cross-linked via allophanate and/or bivret and/or uretone imine groups may be linearized by reaction with an organic polyisocyanate in the presence of a polar solvent and at a temperature of 90‹ to 200‹ C. The resulting products are macropolyisocyanates which retain the urethane and optionally urea groups of the starting polyurethane. These macropolyisocyanates may be modified by reaction with aminoalkyl alkoxysilanes and the modified products so produced reacted with atmospheric moisture to introduce siloxane bridges into the molecule. The process may be applied to polyurethane waste, e.g. in the form of elastomers, foams, films, microporous foils and elastomer threads. Suitably the polyisocyanate is used in amounts of 0À8 to 10% by weight based on the polyurethane to be linearized. Solvents for the process include dimethylformamide, diethylformamide, dimethylacetamide, tetramethyl urea, dimethyl sulphoxide, N-methylpyrrolidone, ethylene glycol carbonate, caprolactone and butyrolactone. The aminoalkyl alkoxysiloxane may be monofunctional or bifunctional with respect to isocyanate groups. In a typical example (1) a polyurethane elastomer derived from a polyester, 4,4<SP>1</SP>-diphenylmethane diisocyanate and butane - 1,4 - diol at an NCO/OH ratio of 1À066 is linearized with isophorone diisocyanate in dimethylformamide at a temperature of 130‹ C. The resulting macropolyisocyanate is reacted with a silane of the formula to form a product which is cross-linked by atmospheric moisture by way of siloxane groups. [GB1422884A]
IE1325/73A 1972-08-05 1973-08-03 Process for linearising cross-linked polymers with polyisocyanates IE37971B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2238741A DE2238741A1 (en) 1972-08-05 1972-08-05 METHOD FOR LINEARIZATION OF CROSS-LINKED ISOCYANATE POLYADDITION PRODUCTS WITH POLYISOCYANATES

Publications (2)

Publication Number Publication Date
IE37971L IE37971L (en) 1974-02-05
IE37971B1 true IE37971B1 (en) 1977-11-23

Family

ID=5852848

Family Applications (1)

Application Number Title Priority Date Filing Date
IE1325/73A IE37971B1 (en) 1972-08-05 1973-08-03 Process for linearising cross-linked polymers with polyisocyanates

Country Status (11)

Country Link
JP (1) JPS4953693A (en)
BE (1) BE803215A (en)
CA (1) CA1023498A (en)
DE (1) DE2238741A1 (en)
ES (1) ES417586A1 (en)
FR (1) FR2194738B1 (en)
GB (1) GB1422884A (en)
IE (1) IE37971B1 (en)
IT (1) IT990129B (en)
LU (1) LU68145A1 (en)
NL (1) NL7310718A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10211311A1 (en) * 2002-03-14 2003-08-07 Wacker Chemie Gmbh Production of N-(triorganylsilylmethyl)-substituted 1,2-diaminoethanes, useful for the production of silyl terminated urea derivatives, comprises reaction of a halomethyltriorganylsilane with ethylenediamine
DE10237271A1 (en) * 2002-08-14 2004-03-04 Consortium für elektrochemische Industrie GmbH Polymer masses based on alkoxysilane-terminated polymers with adjustable curing speed
DE10352907A1 (en) 2002-11-15 2004-08-05 Henkel Kgaa Prepolymers with alkoxysilylalkylgroups attached to the polymeric backbone by hetero-atoms, used for the production of adhesives and polyurethane foam in cans
DE102007032342A1 (en) 2007-07-11 2009-01-15 Bayer Materialscience Ag Process for the preparation of polyurethane foams based on special alkoxysilane-functional polymers
WO2020225310A1 (en) * 2019-05-06 2020-11-12 Basf Coatings Gmbh Silane-based coating composition

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE962649C (en) * 1955-03-17 1957-04-25 Rudolph Koepp & Co Chem Fab A Process for the production of foams using polyurethane foam waste

Also Published As

Publication number Publication date
IE37971L (en) 1974-02-05
FR2194738A1 (en) 1974-03-01
LU68145A1 (en) 1973-10-16
IT990129B (en) 1975-06-20
BE803215A (en) 1974-02-04
GB1422884A (en) 1976-01-28
ES417586A1 (en) 1976-03-16
JPS4953693A (en) 1974-05-24
DE2238741A1 (en) 1974-02-07
CA1023498A (en) 1977-12-27
NL7310718A (en) 1974-02-07
FR2194738B1 (en) 1979-04-20

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