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GB985144A - Process for purification of isocyanate group-containing compounds - Google Patents

Process for purification of isocyanate group-containing compounds

Info

Publication number
GB985144A
GB985144A GB1164162A GB1164162A GB985144A GB 985144 A GB985144 A GB 985144A GB 1164162 A GB1164162 A GB 1164162A GB 1164162 A GB1164162 A GB 1164162A GB 985144 A GB985144 A GB 985144A
Authority
GB
United Kingdom
Prior art keywords
diisocyanates
absorbent
polymer
reaction product
polymers
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
GB1164162A
Inventor
John Alwyn Hall
Reginald John William Reynolds
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 GB1164162A priority Critical patent/GB985144A/en
Publication of GB985144A publication Critical patent/GB985144A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used

Landscapes

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

Abstract

Isocyanate group-containing reaction products of organic diisocyanates with organic compounds containing at least two alcoholic hydroxyl groups and isocyanurate polymers of organic diisocyanates contaminated with said diisocyanates are purified by heating said reaction product or polymer in a solvent inert towards the isocyanate group with a diisocyanate-absorptive material inert towards and insoluble in said solvent and selected from active carbon, alumina, silica gel, gelatine, glue, siliceous earths, natural and synthetic rubbers, polyamides, polyvinyl acetate, polymethyl methacrylate and polystryene and subsequently removing the absorbent. The purification is conveniently performed at between 0 DEG and 100 DEG C. by agitating a solution containing 20-80% by weight of the reaction product or polymer with 1 to 40% by weight of the reaction product or polymer of absorbent which has previously been dried by heating in vacuum at 120 DEG C. The treatment time is normally greater than 10 hours after which the absorbent is removed by, for example, filtration or centrifugal means. The process of the invention is especially useful when applied to the reaction products or polymers of tolylene-2 : 4- or -2 : 6-diisocyanate, hexamethylene diisocyanate or mixtures thereof. Specified inert solvents are ethyl, butyl and ethoxy ethyl acetates, methyl isobutyl ketone, acetone, toluene, xylene or mixtures thereof. Specifications 795,051 and 795,052 are referred to.ALSO:Isocyanate group-containing reaction products of organic diisocyanates with organic compounds containing at least two alcoholic hydroxyl groups and isocyanurate polymers of organic diisocyanates contaminated with said diisocyanates are purified by heating said reaction product or polymer in a solvent inert towards isocyanate groups with a diisocyanate-absorptive material inert towards and insoluble in said solvent and selected from active carbon, alumina, silica gel, gelatine, glue, siliceous earths, natural and synthetic rubbers, polyamides, polyvinyl acetate, polymethyl methacrylate and polystyrene and subsequently removing the absorbent. The purification is conveniently performed at between 0 DEG and 100 DEG C. by agitating a solution containing 20-80% by weight of the reaction product or polymer with 1 to 40% by weight of the reaction product or polymer of absorbent which has previously been dried by heating in a vacuum at 120 DEG C. The treatment time is normally greater than 10 hours after which the absorbent is removed by, for example, filtration or centrifugal means. The process of the invention is especially useful when applied to reaction products or polymers of tolylene-2 : 4- and -2 : 6-diisocyanates, hexamethylene diisocyanate or mixtures thereof and in particular isocyanurate or mixed isocyanurate polymers of said diisocyanates and reaction products of said diisocyanates with trihydric alcohols. Specified inert solvents are ethyl, butyl and ethoxy ethylacetates, methyl isobutyl ketone, acetone, toluene, xylene or mixtures thereof. Specifications 795,051 and 795,052 are referred to.
GB1164162A 1962-03-27 1962-03-27 Process for purification of isocyanate group-containing compounds Expired GB985144A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1164162A GB985144A (en) 1962-03-27 1962-03-27 Process for purification of isocyanate group-containing compounds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1164162A GB985144A (en) 1962-03-27 1962-03-27 Process for purification of isocyanate group-containing compounds

Publications (1)

Publication Number Publication Date
GB985144A true GB985144A (en) 1965-03-03

Family

ID=9990002

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1164162A Expired GB985144A (en) 1962-03-27 1962-03-27 Process for purification of isocyanate group-containing compounds

Country Status (1)

Country Link
GB (1) GB985144A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0571038A1 (en) * 1992-05-22 1993-11-24 Dsm N.V. Process for the preparation of a polyisocyanate containing isocyanurate groups
EP2062877A1 (en) * 2007-11-20 2009-05-27 Tyco Healthcare Group LP Purification of isocyanate functional polymers
US7858835B2 (en) 2007-06-27 2010-12-28 Tyco Healthcare Group Lp Foam control for synthetic adhesive/sealant
US7858078B2 (en) 2005-12-06 2010-12-28 Tyco Healthcare Group Lp Bioabsorbable surgical composition
US7910129B2 (en) 2005-12-06 2011-03-22 Tyco Healthcare Group Lp Carbodiimide crosslinking of functionalized polyethylene glycols
US7947263B2 (en) 2005-12-06 2011-05-24 Tyco Healthcare Group Lp Biocompatible surgical compositions
US7998466B2 (en) 2005-12-06 2011-08-16 Tyco Healthcare Group Lp Biocompatible tissue sealants and adhesives
US8044234B2 (en) 2005-05-05 2011-10-25 Tyco Healthcare Group Lp Bioabsorbable surgical composition
US8263704B2 (en) 2008-04-23 2012-09-11 Tyco Healthcare Group Lp Bioabsorbable surgical composition
US8288477B2 (en) 2005-12-06 2012-10-16 Tyco Healthcare Group Lp Bioabsorbable compounds and compositions containing them
US8349987B2 (en) 2009-02-19 2013-01-08 Covidien Lp Adhesive formulations
US8449714B2 (en) 2005-12-08 2013-05-28 Covidien Lp Biocompatible surgical compositions
US9707252B2 (en) 2005-02-09 2017-07-18 Covidien Lp Synthetic sealants

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0571038A1 (en) * 1992-05-22 1993-11-24 Dsm N.V. Process for the preparation of a polyisocyanate containing isocyanurate groups
US9707252B2 (en) 2005-02-09 2017-07-18 Covidien Lp Synthetic sealants
US8044234B2 (en) 2005-05-05 2011-10-25 Tyco Healthcare Group Lp Bioabsorbable surgical composition
US7998466B2 (en) 2005-12-06 2011-08-16 Tyco Healthcare Group Lp Biocompatible tissue sealants and adhesives
US7910129B2 (en) 2005-12-06 2011-03-22 Tyco Healthcare Group Lp Carbodiimide crosslinking of functionalized polyethylene glycols
US7947263B2 (en) 2005-12-06 2011-05-24 Tyco Healthcare Group Lp Biocompatible surgical compositions
US7858078B2 (en) 2005-12-06 2010-12-28 Tyco Healthcare Group Lp Bioabsorbable surgical composition
US8288477B2 (en) 2005-12-06 2012-10-16 Tyco Healthcare Group Lp Bioabsorbable compounds and compositions containing them
US8357361B2 (en) 2005-12-06 2013-01-22 Covidien Lp Bioabsorbable surgical composition
US8449714B2 (en) 2005-12-08 2013-05-28 Covidien Lp Biocompatible surgical compositions
US8790488B2 (en) 2005-12-08 2014-07-29 Covidien Lp Biocompatible surgical compositions
US7858835B2 (en) 2007-06-27 2010-12-28 Tyco Healthcare Group Lp Foam control for synthetic adhesive/sealant
EP2062877A1 (en) * 2007-11-20 2009-05-27 Tyco Healthcare Group LP Purification of isocyanate functional polymers
US8263704B2 (en) 2008-04-23 2012-09-11 Tyco Healthcare Group Lp Bioabsorbable surgical composition
US8349987B2 (en) 2009-02-19 2013-01-08 Covidien Lp Adhesive formulations

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