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GB809809A - Polymeric isocyanates and their manufacture - Google Patents

Polymeric isocyanates and their manufacture

Info

Publication number
GB809809A
GB809809A GB3508156A GB3508156A GB809809A GB 809809 A GB809809 A GB 809809A GB 3508156 A GB3508156 A GB 3508156A GB 3508156 A GB3508156 A GB 3508156A GB 809809 A GB809809 A GB 809809A
Authority
GB
United Kingdom
Prior art keywords
polymers
isocyanates
diisocyanate
isocyanate
isocyanurate
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB3508156A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB3508156A priority Critical patent/GB809809A/en
Priority to CH5273957A priority patent/CH371122A/en
Publication of GB809809A publication Critical patent/GB809809A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/02Polymeric products of isocyanates or isothiocyanates of isocyanates or isothiocyanates only
    • C08G18/022Polymeric products of isocyanates or isothiocyanates of isocyanates or isothiocyanates only the polymeric products containing isocyanurate groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

Polymeric organic isocyanates are prepared by contacting an organic polyisocyanate with at east one basic catalyst selected from alkali and alkaline earth metal oxides, hydroxides, carbonates, alcoholates and phenates, alkali metal salts of enolizable compounds and metallic salts of weak aliphatic and alicyclic carboxylic acids. The invention also comprises isocyanurate polymers of diisocyanates containing at least one aliphatically or cycloaliphatically linked isocyanate group, attached to an aromatic nucleus, isocyanurate polymers of m-xylylene diisocyanate [C6H4(CH2NCO)2], and isocyanurate polymers of chlorphenylene-2,4-diisocyanate. The catalysts are stated to promote the formation of polymers containing the isocyanurate ring. Numerous catalysts are specified. The reaction may be carried out in the absence or presence of a solvent such as an ester, ketone, hydrocarbon, chlorinated hydrocarbon, phenol or ether. The reaction may be stopped by filtering off the catalyst, where insoluble, or by neutralizing it with a strong acid. Amounts of catalyst mentioned are 0.01 to 10 per cent by weight of the organic isocyanate. The reaction temperature is preferably below 200 DEG C. and may be ambient. Many di- and tri-isocyanates are specified for polymerization. The polyisocyanates may be polymerized with aromatic mono-isocyanates, e.g. phenyl-, tolyl-, chlorphenyl- or methoxyphenyl-isocyanates. The products may be reacted with, for example, phenols, acetoacetic esters, malonic esters and diphenylamine; the resulting compounds behave as free isocyanates at elevated temperatures. The isocyanate polymers and their reaction products may be used as adhesives, curing agents, e.g. for isocyanate modified polyesters or polyether raw rubbers or as components thereof, or instead of the monomeric isocyanates in various applications. They may be used as the substantially monomer-free practically fully converted polymer, in solution in the polyisocyanate from which they are derived, in admixture with other polyisocyanates, or in organic solvents such as chloroform, methylene dichloride, esters (e.g. ethyl acetate), ketones (e.g. acetone) or benzene hydrocarbons. Examples describe the preparation of polymers, all containing the isocyanurate ring and having free isocyanate groups from: 2,4-tolylene diisocyanate; a mixture of 2,4- and 2,6-tolylene diisocyanates; (4,5,8) diisocyanatodiphenylmethane; (12) hexamethylene diisocyanate; (15) chlorphenylene - 2,4 - diisocyanate; (19) m - xylylene diisocyanate: (20) 2,4,6 - triiso-cyanatotoluene. Catalysts used are sodium methoxide, fused sodium acetate, lead 2-ethylhexoate, lead naphthenate manganese linoleate, sodium p-octylphenate, potassium carbonate, potassium hydroxide, calcium hydroxide, barium oxide and sodio ethyl acetoacetate. White spirit and/or ethyl acetate or monochlorobenzene may be used as solvent for the reaction. In Examples (11) and (22), polymers from mixtures of 2,4- and 2,6-tolylene diisocyanates are reacted with phenol in acetone or b -ethoxyethyl acetate solution. In Example (21) a mixture of 2,4- and 2,6-tolylene diisocyanates is reacted with phenyl isocyanate.ALSO:Polymeric organic isocyanates are prepared by contacting an organic polyisocyanate with at least one basic catalyst selected from alkali and alkaline earth metal oxides, hydroxides, carbonates, alcoholates and phenates, alkali metal salts of enolizable compounds and metallic salts of weak aliphatic and alicyclic carboxylic acids. The invention also comprises isocyanurate polymers of diisocyanates containing at least one aliphatically or cycloaliphatically linked isocyanate group, attached to an aromatic nucleus, isocyanurate polymers of m-xylylene diisocyanate [C6H4(CH2NCO)2], and isocyanurate polymers of chlorphenylene-2,4-diisocyanate. The catalysts are stated to promote the formation of polymers containing the isocyanurate ring. Numerous catalysts are specified. The reaction may be carried out in the absence or presence of a solvent such as an ester ketone, hydrocarbon, chlorinated hydrocarbon, phenol, or ether. The reaction may be stopped by filtering off the catalyst, where insoluble, or by neutralizing it with a strong acid. Amounts of catalyst mentioned are 0.01 to 10 per cent by weight of the organic isocyanate. The reaction temperature is preferably below 200 DEG C. and may be ambient. Many di- and tri-isocyanates are specified for polymerization. The products may be reacted with, for example, phenols, acetoacetic esters, malonic esters and diphenylamine; the resulting compounds behave as free isocyanates at elevated temperatures. The isocyanate polymers and their reaction products may be used as adhesives, curing agents or instead of the monomeric isocyanates in various applications. Examples describe the preparation of polymers, all containing the isocyanurate ring and having free isocyanate groups from: 2,4-tolylene diisocyanate; a mixture of 2,4- and 2,6-tolylene diisocyanates; diisocyanatodiphenylmethane; hexamethylene diisocyanate; chlorphenylene - 2,4 - diisocyanate; m-xylylene diisocyanate; 2,4,6 - triisocyanatotoluene. Catalysts used are sodium methoxide, fused sodium acetate, lead 2-ethylhexoate, manganese linoleate, sodium p-octylphenate, potassium carbonate, potassium hydroxide, calcium hydroxide, barium oxide and sodio ethyl acetoacetate. White spirit and/or ethyl acetate may be used as solvent. In Examples (11) and (22) polymers from mixtures of 2,4- and 2,6-tolylene diisocyanates are reacted with phenol in acetone or b -ethoxyethyl acetate solution. In Example (4) diisocyanatodiphenylmethane starting material is prepared by reacting aniline with formaldehyde to give a mixture of 2,41 and 4,41-diaminodiphenylmethane which is then phosgenated.
GB3508156A 1956-11-16 1956-11-16 Polymeric isocyanates and their manufacture Expired GB809809A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3508156A GB809809A (en) 1956-11-16 1956-11-16 Polymeric isocyanates and their manufacture
CH5273957A CH371122A (en) 1956-11-16 1957-11-16 Process for polymerizing organic isocyanates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3508156A GB809809A (en) 1956-11-16 1956-11-16 Polymeric isocyanates and their manufacture

Publications (1)

Publication Number Publication Date
GB809809A true GB809809A (en) 1959-03-04

Family

ID=10373572

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3508156A Expired GB809809A (en) 1956-11-16 1956-11-16 Polymeric isocyanates and their manufacture

Country Status (2)

Country Link
CH (1) CH371122A (en)
GB (1) GB809809A (en)

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3205200A (en) * 1958-08-04 1965-09-07 Bayer Ag Triaryl cyanurate polymeric composition
US4128537A (en) * 1977-07-27 1978-12-05 Ici Americas Inc. Process for preparing ethylenically unsaturated isocyanurates
US4195146A (en) * 1977-07-27 1980-03-25 Ici Americas Inc. Esters of carboxy amino phenyl isocyanurates and vinylidene carbonyl oxy alkanols
US4379905A (en) 1981-01-08 1983-04-12 Bayer Aktiengesellschaft Process for the preparation of polyisocyanates containing isocyanurate groups and their use in the production of polyurethanes
US4419513A (en) 1980-09-09 1983-12-06 Bayer Aktiengesellschaft Isocyanato-isocyanurates, and process for the production thereof
US4487928A (en) * 1981-01-08 1984-12-11 Bayer Aktiengesellschaft Process for the preparation of polyisocyanates containing isocyanurate groups, and the use of the products of the process as isocyanate component in the production of polyurethanes
EP0859805B1 (en) * 1995-11-06 2003-04-02 Huntsman International Llc Polyisocyanate composition for binding lignocellulosic material
EP3085718A1 (en) 2015-04-21 2016-10-26 Covestro Deutschland AG Siloxane groups containing polyisocyanurate plastic and method for producing the same
WO2016170060A1 (en) 2015-04-21 2016-10-27 Covestro Deutschland Ag Process for producing polyisocvanurate plastics having functionalized surfaces
WO2016170057A1 (en) 2015-04-21 2016-10-27 Covestro Deutschland Ag Solids based on polyisocvanurate polymers produced under adiabatic conditions
WO2016170058A1 (en) 2015-04-21 2016-10-27 Covestro Deutschland Ag Process for producing polyisocyanurate plastics
WO2016170061A1 (en) 2015-04-21 2016-10-27 Covestro Deutschland Ag Polyisocyanurate plastics having high thermal stability
WO2017074928A1 (en) 2015-10-30 2017-05-04 Covestro Llc Polyisocyanurate based cement for wellbore fluid loss prevention
WO2018054776A1 (en) 2016-09-20 2018-03-29 Covestro Deutschland Ag Anisotropic composite materials based on polyisocyanates
WO2018073299A1 (en) 2016-10-18 2018-04-26 Covestro Deutschland Ag Production of plastics by catalytic crosslinking of blocked polvisocvanates
WO2018073303A1 (en) 2016-10-18 2018-04-26 Covestro Deutschland Ag Hard coatings with high chemical and mechanical stability
WO2018073302A1 (en) 2016-10-18 2018-04-26 Covestro Deutschland Ag Coating of wires with catalytically crosslinked blocked polyisocyanates
WO2018087396A1 (en) 2016-11-14 2018-05-17 Covestro Deutschland Ag Dual-curing isocyanurate polymers
EP3381962A1 (en) 2017-03-29 2018-10-03 Covestro Deutschland AG Generation of polyisocyanurate layers through separate application of isocyanate components and catalysts
EP3401096A1 (en) 2017-05-09 2018-11-14 Covestro Deutschland AG Method for the preparation of products by means of additive production methods with reactive powders and products of same
EP3421516A1 (en) 2017-06-28 2019-01-02 Covestro Deutschland AG Coloured plastics based on crosslinked polyisocyanates
WO2019062383A1 (en) 2017-09-26 2019-04-04 Covestro Deutschland Ag Two-component system for elastic coatings
WO2019092140A1 (en) 2017-11-09 2019-05-16 Covestro Deutschland Ag Process for manufacturing an object, and use of a radically cross-linkable resin in an additive manufacturing process
WO2019096813A1 (en) 2017-11-14 2019-05-23 Covestro Deutschland Ag Semi-finished product on the basis of a dual crosslinking mechanism
WO2019121388A1 (en) 2017-12-21 2019-06-27 Covestro Deutschland Ag Frost-resistant adhesives based on polyisocyanates
WO2019121387A1 (en) 2017-12-21 2019-06-27 Covestro Deutschland Ag Frost-resistant water paints based on polyisocyanates
WO2019158455A1 (en) 2018-02-13 2019-08-22 Covestro Deutschland Ag Aromatic polyisocyanates with a high solids content
WO2019219614A1 (en) 2018-05-17 2019-11-21 Covestro Deutschland Ag Method for preparing composite materials made of polyethylene fibers having an ultra-high molecular weight and cross-linked polyisocyanates
WO2019219603A1 (en) 2018-05-17 2019-11-21 Covestro Deutschland Ag Method for producing a polyisocyanate polymer and a polyisocyanurate plastic
EP3626201A1 (en) 2018-09-20 2020-03-25 Covestro Deutschland AG 3d-printed orthodontic dental splint made of cross-linked polymers
WO2020079160A1 (en) 2018-10-19 2020-04-23 Covestro Deutschland Ag Anhydrously curing polyisocyanate-based adhesives
WO2020124405A1 (en) * 2018-12-19 2020-06-25 Covestro Deutschland Ag Thermolatent catalyst for polymerization of isocyanates
WO2020152107A1 (en) 2019-01-22 2020-07-30 Covestro Intellectual Property Gmbh & Co. Kg Composite materials based on dual-cure urethane polymers and dual-cure isocyanurate polymers
US10752723B2 (en) 2015-04-21 2020-08-25 Covestro Deutschland Ag Polyisocyanurate polymer and process for the production of polyisocyanurate polymers
WO2020174009A1 (en) 2019-02-27 2020-09-03 Covestro Intellectual Property Gmbh & Co. Kg Polyisocyanurate materials as electrical potting compounds
EP3763792A1 (en) 2019-07-11 2021-01-13 Covestro Deutschland AG Method for the production of isocyanurates from uretdiones
WO2022002787A1 (en) 2020-07-02 2022-01-06 Covestro Deutschland Ag Coatings from polyisocyanurate coatings (rim) and their use in injection molding processes
WO2022002679A1 (en) 2020-06-29 2022-01-06 Covestro Deutschland Ag Two-component coating composition
EP3988597A1 (en) 2020-10-26 2022-04-27 Covestro Deutschland AG Two-component coating composition
EP3988596A1 (en) 2020-10-26 2022-04-27 Covestro Deutschland AG Polyether-modified polyisocyanate composition
EP4015554A1 (en) 2020-12-17 2022-06-22 Covestro Deutschland AG Water-dispersible modified polyisocyanates
WO2022207532A1 (en) 2021-03-29 2022-10-06 Covestro Deutschland Ag Polyisocyanurate-prepregs and fiber composite components produced therefrom
WO2023187113A1 (en) 2022-04-01 2023-10-05 Covestro Deutschland Ag A two-component coating composition
US11795262B2 (en) 2020-06-29 2023-10-24 Covestro Deutschland Ag Polyether-modified polyisocyanate composition
EP4279519A1 (en) 2022-05-19 2023-11-22 Covestro Deutschland AG A two-component coating composition
WO2024008544A1 (en) 2022-07-04 2024-01-11 Covestro Deutschland Ag Polyisocyanate mixture

Cited By (71)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3205200A (en) * 1958-08-04 1965-09-07 Bayer Ag Triaryl cyanurate polymeric composition
US4128537A (en) * 1977-07-27 1978-12-05 Ici Americas Inc. Process for preparing ethylenically unsaturated isocyanurates
US4195146A (en) * 1977-07-27 1980-03-25 Ici Americas Inc. Esters of carboxy amino phenyl isocyanurates and vinylidene carbonyl oxy alkanols
US4419513A (en) 1980-09-09 1983-12-06 Bayer Aktiengesellschaft Isocyanato-isocyanurates, and process for the production thereof
US4379905A (en) 1981-01-08 1983-04-12 Bayer Aktiengesellschaft Process for the preparation of polyisocyanates containing isocyanurate groups and their use in the production of polyurethanes
US4487928A (en) * 1981-01-08 1984-12-11 Bayer Aktiengesellschaft Process for the preparation of polyisocyanates containing isocyanurate groups, and the use of the products of the process as isocyanate component in the production of polyurethanes
EP0859805B1 (en) * 1995-11-06 2003-04-02 Huntsman International Llc Polyisocyanate composition for binding lignocellulosic material
US10717805B2 (en) 2015-04-21 2020-07-21 Covestro Deutschland Ag Process for producing polyisocyanurate plastics
US11286332B2 (en) 2015-04-21 2022-03-29 Covestro Deutschland Ag Hydrophobically modified polyisocyanurate plastic and method for production thereof
EP3085720A1 (en) 2015-04-21 2016-10-26 Covestro Deutschland AG Hydrophilic modified polyisocyanurate plastic and method for producing the same
WO2016170060A1 (en) 2015-04-21 2016-10-27 Covestro Deutschland Ag Process for producing polyisocvanurate plastics having functionalized surfaces
WO2016170057A1 (en) 2015-04-21 2016-10-27 Covestro Deutschland Ag Solids based on polyisocvanurate polymers produced under adiabatic conditions
WO2016170058A1 (en) 2015-04-21 2016-10-27 Covestro Deutschland Ag Process for producing polyisocyanurate plastics
WO2016170061A1 (en) 2015-04-21 2016-10-27 Covestro Deutschland Ag Polyisocyanurate plastics having high thermal stability
US11390707B2 (en) 2015-04-21 2022-07-19 Covestro Deutschland Ag Polyisocyanurate polymers and process for the production of polyisocyanurate polymers
WO2017182109A1 (en) 2015-04-21 2017-10-26 Covestro Deutschland Ag Hydrophobically modified polyisocyanurate plastic and method for production thereof
US10590226B2 (en) 2015-04-21 2020-03-17 Covestro Deutschland Ag Solids based on polyisocyanurate polymers produced under adiabatic conditions
US10597484B2 (en) 2015-04-21 2020-03-24 Covestro Deutschland Ag Polyisocyanurate plastics having high thermal stability
US11286331B2 (en) 2015-04-21 2022-03-29 Covestro Deutschland Ag Hydrophilically modified polyisocyanurate plastic and process for production thereof
EP3085719A1 (en) 2015-04-21 2016-10-26 Covestro Deutschland AG Hydrophobically modified polyisocyanurate plastic and method for producing the same
US10752724B2 (en) 2015-04-21 2020-08-25 Covestro Deutschland Ag Process for producing polyisocvanurate plastics having functionalized surfaces
EP3085718A1 (en) 2015-04-21 2016-10-26 Covestro Deutschland AG Siloxane groups containing polyisocyanurate plastic and method for producing the same
US10752723B2 (en) 2015-04-21 2020-08-25 Covestro Deutschland Ag Polyisocyanurate polymer and process for the production of polyisocyanurate polymers
WO2017074928A1 (en) 2015-10-30 2017-05-04 Covestro Llc Polyisocyanurate based cement for wellbore fluid loss prevention
WO2018054776A1 (en) 2016-09-20 2018-03-29 Covestro Deutschland Ag Anisotropic composite materials based on polyisocyanates
WO2018073302A1 (en) 2016-10-18 2018-04-26 Covestro Deutschland Ag Coating of wires with catalytically crosslinked blocked polyisocyanates
WO2018073303A1 (en) 2016-10-18 2018-04-26 Covestro Deutschland Ag Hard coatings with high chemical and mechanical stability
WO2018073299A1 (en) 2016-10-18 2018-04-26 Covestro Deutschland Ag Production of plastics by catalytic crosslinking of blocked polvisocvanates
WO2018087395A1 (en) 2016-11-14 2018-05-17 Covestro Deutschland Ag Composite materials based on dual-curing isocyanurate polymers
US11613072B2 (en) 2016-11-14 2023-03-28 Covestro Deutschland Ag Dual-curing isocyanurate polymers
WO2018087396A1 (en) 2016-11-14 2018-05-17 Covestro Deutschland Ag Dual-curing isocyanurate polymers
WO2018087399A1 (en) 2016-11-14 2018-05-17 Covestro Deutschland Ag Dual-curing coating compositions
WO2018087382A1 (en) 2016-11-14 2018-05-17 Covestro Deutschland Ag Method for producing an object from a precursor, and use of a radically crosslinkable resin in an additive production method
US11590692B2 (en) 2016-11-14 2023-02-28 Covestro Deutschland Ag Method for producing an object from a precursor, and use of a radically crosslinkable resin in an additive production method
US10449714B2 (en) 2016-11-14 2019-10-22 Covestro Deutschland Ag Process for producing an object from a precursor and use of a free-radically crosslinkable resin in an additive manufacturing process
EP3381962A1 (en) 2017-03-29 2018-10-03 Covestro Deutschland AG Generation of polyisocyanurate layers through separate application of isocyanate components and catalysts
WO2018178149A1 (en) 2017-03-29 2018-10-04 Covestro Deutschland Ag Formation of coatings by separate application of polyisocyanate compositions and crosslinking catalysts
WO2018206614A1 (en) 2017-05-09 2018-11-15 Covestro Deutschland Ag Method for producing products by means of additive manufacturing methods using reactive powders, and products thereof
EP3401096A1 (en) 2017-05-09 2018-11-14 Covestro Deutschland AG Method for the preparation of products by means of additive production methods with reactive powders and products of same
EP3421516A1 (en) 2017-06-28 2019-01-02 Covestro Deutschland AG Coloured plastics based on crosslinked polyisocyanates
WO2019002124A1 (en) 2017-06-28 2019-01-03 Covestro Deutschland Ag Coloured plastics based on crosslinked polyisocyanates
US11760828B2 (en) 2017-09-26 2023-09-19 Covestro Deutschland Ag Two-component system for elastic coatings
WO2019062383A1 (en) 2017-09-26 2019-04-04 Covestro Deutschland Ag Two-component system for elastic coatings
US11007711B2 (en) 2017-11-09 2021-05-18 Covestro Deutschland Ag Process for manufacturing an object, and use of a radically cross-linkable resin in an additive manufacturing process
WO2019092140A1 (en) 2017-11-09 2019-05-16 Covestro Deutschland Ag Process for manufacturing an object, and use of a radically cross-linkable resin in an additive manufacturing process
WO2019096813A1 (en) 2017-11-14 2019-05-23 Covestro Deutschland Ag Semi-finished product on the basis of a dual crosslinking mechanism
WO2019121387A1 (en) 2017-12-21 2019-06-27 Covestro Deutschland Ag Frost-resistant water paints based on polyisocyanates
US11124672B2 (en) 2017-12-21 2021-09-21 Covestro Deutschland Ag Frost-resistant water paints based on polyisocyanates
WO2019121388A1 (en) 2017-12-21 2019-06-27 Covestro Deutschland Ag Frost-resistant adhesives based on polyisocyanates
US11124682B2 (en) 2017-12-21 2021-09-21 Covestro Deutschland Ag Frost-resistant adhesives based on polyisocyanates
WO2019158455A1 (en) 2018-02-13 2019-08-22 Covestro Deutschland Ag Aromatic polyisocyanates with a high solids content
US11319402B2 (en) 2018-05-17 2022-05-03 Covestro Intellectual Property Gmbh & Co. Kg Method for producing a polyisocyanate polymer and a polyisocyanurate plastic
WO2019219614A1 (en) 2018-05-17 2019-11-21 Covestro Deutschland Ag Method for preparing composite materials made of polyethylene fibers having an ultra-high molecular weight and cross-linked polyisocyanates
WO2019219603A1 (en) 2018-05-17 2019-11-21 Covestro Deutschland Ag Method for producing a polyisocyanate polymer and a polyisocyanurate plastic
EP3626201A1 (en) 2018-09-20 2020-03-25 Covestro Deutschland AG 3d-printed orthodontic dental splint made of cross-linked polymers
WO2020079160A1 (en) 2018-10-19 2020-04-23 Covestro Deutschland Ag Anhydrously curing polyisocyanate-based adhesives
WO2020124405A1 (en) * 2018-12-19 2020-06-25 Covestro Deutschland Ag Thermolatent catalyst for polymerization of isocyanates
WO2020152107A1 (en) 2019-01-22 2020-07-30 Covestro Intellectual Property Gmbh & Co. Kg Composite materials based on dual-cure urethane polymers and dual-cure isocyanurate polymers
WO2020174009A1 (en) 2019-02-27 2020-09-03 Covestro Intellectual Property Gmbh & Co. Kg Polyisocyanurate materials as electrical potting compounds
EP3763792A1 (en) 2019-07-11 2021-01-13 Covestro Deutschland AG Method for the production of isocyanurates from uretdiones
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Also Published As

Publication number Publication date
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