Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C267/00—Carbodiimides
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
  • C07F9/02—Phosphorus compounds
  • C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
  • C07F9/6564—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having phosphorus atoms, with or without nitrogen, oxygen, sulfur, selenium or tellurium atoms, as ring hetero atoms
  • C07F9/6568—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having phosphorus atoms, with or without nitrogen, oxygen, sulfur, selenium or tellurium atoms, as ring hetero atoms having phosphorus atoms as the only ring hetero atoms
• • 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
  • C08G18/09—Processes comprising oligomerisation of isocyanates or isothiocyanates involving reaction of a part of the isocyanate or isothiocyanate groups with each other in the reaction mixture
  • C08G18/095—Processes comprising oligomerisation of isocyanates or isothiocyanates involving reaction of a part of the isocyanate or isothiocyanate groups with each other in the reaction mixture oligomerisation to carbodiimide or uretone-imine groups

Definitions

• the invention relates to a process for preparing carbodiimide and / or uretonimine containing organic isocyanates, in which one or more organic isocyanates having a Hazen color number of ⁇ 100 APHA, preferably ⁇ 50 APHA, partially carbodiimidized with phospholine-type catalysts, and Subsequently, the carbodiimidization reaction is stopped, characterized in that the carbodiimidization is carried out in the presence of an orthoester. As a result, the required reaction time can be lowered or kept low and / or the required amount of catalyst can be reduced.
• the invention also provides for the use of the organic isocyanates having carbodiimide and / or uretonimine groups according to the invention for the preparation of mixtures with further isocyanates or for the preparation of isocyanate group-containing prepolymers having an improved color number.
• the process according to the invention is carried out in the presence of phospholine-type catalysts.
• the phospholine-type catalysts are known, for example, from EP-A-515 933 and US-A-6, 120,699. Typical examples of these catalysts are, for example, the mixtures of the phospholine oxides of the formula ## STR1 ## known from the prior art:
• Jl3_bis-R ⁇ can-either-all-or-don ⁇ t immediately all -versehieden Being-or-two of the radicals R 2 ⁇ to ⁇ 5 ⁇ R may be the same, or two or three of the radicals R 2 to R 5 can be the same. It is also possible that two or two or three of the radicals R 2 to R 5 are parts of a single molecule and thus cyclic or bicyclic orthoester structures are present.
• R 2 to R 5 may either be the same or different, or two of R 2 to R 5 may each be the same, or two or three of R 2 to R 5 may be the same. It is also possible that two or two or three of the radicals R 2 to R are parts of a single molecule and thus cyclic or bicyclic orthoester structures are present.
• Suitable orthoesters of silicic acid include Tetramethylorthosüicat and tetraethyl orthosilicate or mixtures thereof. The compounds mentioned are considered as examples only; suitable orthoesters of silicic acid are not limited to the compounds mentioned.
• the reaction product of the carbodiimidization may contain color stabilizers, such as are commonly added to isocyanates.
• the time of addition is not critical.
• the color stabilizers can either be added to the isocyanate used as starting material before the carbodiimidization, or the reaction product after completion of the reaction. It is also possible to add color stabilizers to both the starting material and the reaction product.
• Such stabilizers are generally known to those skilled in the art and include e.g. Substances from the group of sterically hindered phenols, the Phosphorigklaer or sterically hindered amines.
• the color stabilizers can each be used alone or in admixture with other representatives of the same or different substance groups.
• Comparative Example 1 shows that the addition of the orthoester with a double content of hydrolyzable chlorine again achieves comparable reactivity, ie. H. to achieve the same NCO value, a comparable reaction time is made possible.

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

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• 2006
  • 2006-01-05 DE DE102006000825A patent/DE102006000825A1/de not_active Withdrawn
  • 2006-12-27 WO PCT/EP2006/012552 patent/WO2007076999A1/de not_active Ceased
  • 2006-12-27 EP EP06841178A patent/EP1973870A1/de not_active Withdrawn
  • 2006-12-27 KR KR1020087019154A patent/KR20080090500A/ko not_active Ceased
  • 2006-12-27 CN CNA2006800505438A patent/CN101356154A/zh active Pending
  • 2006-12-27 JP JP2008548948A patent/JP2009522418A/ja not_active Withdrawn
• 2007
  • 2007-01-03 US US11/649,000 patent/US7662989B2/en not_active Expired - Fee Related

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