IE37971B1 - Process for linearising cross-linked polymers with polyisocyanates - Google Patents
Process for linearising cross-linked polymers with polyisocyanatesInfo
- 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
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]
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)
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 |
US20220213346A1 (en) * | 2019-05-06 | 2022-07-07 | Basf Coatings Gmbh | Silane-based coating composition |
Family Cites Families (1)
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 |
-
1972
- 1972-08-05 DE DE2238741A patent/DE2238741A1/en active Pending
-
1973
- 1973-07-17 CA CA176,646A patent/CA1023498A/en not_active Expired
- 1973-08-02 NL NL7310718A patent/NL7310718A/xx unknown
- 1973-08-02 LU LU68145D patent/LU68145A1/xx unknown
- 1973-08-03 JP JP8691373A patent/JPS4953693A/ja active Pending
- 1973-08-03 BE BE134236A patent/BE803215A/en unknown
- 1973-08-03 IE IE1325/73A patent/IE37971B1/en unknown
- 1973-08-03 IT IT5182173A patent/IT990129B/en active
- 1973-08-03 GB GB3695873A patent/GB1422884A/en not_active Expired
- 1973-08-03 FR FR7328531A patent/FR2194738B1/fr not_active Expired
- 1973-08-04 ES ES417586A patent/ES417586A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2194738A1 (en) | 1974-03-01 |
CA1023498A (en) | 1977-12-27 |
LU68145A1 (en) | 1973-10-16 |
GB1422884A (en) | 1976-01-28 |
FR2194738B1 (en) | 1979-04-20 |
NL7310718A (en) | 1974-02-07 |
BE803215A (en) | 1974-02-04 |
IE37971L (en) | 1974-02-05 |
IT990129B (en) | 1975-06-20 |
ES417586A1 (en) | 1976-03-16 |
JPS4953693A (en) | 1974-05-24 |
DE2238741A1 (en) | 1974-02-07 |
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