GB1071425A - Production of polyurethanes - Google Patents

Production of polyurethanes

Info

Publication number
GB1071425A
GB1071425A GB3497064A GB3497064A GB1071425A GB 1071425 A GB1071425 A GB 1071425A GB 3497064 A GB3497064 A GB 3497064A GB 3497064 A GB3497064 A GB 3497064A GB 1071425 A GB1071425 A GB 1071425A
Authority
GB
United Kingdom
Prior art keywords
added
solution
water present
nco
organic solvent
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
GB3497064A
Inventor
Dieter Dieterich
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.)
Bayer AG
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 GB1071425A publication Critical patent/GB1071425A/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
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/302—Water
    • 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

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

A solution of a polyurethane is prepared by reacting an organic polyisocyanate with a polyhydroxyl compound and at the commencement of or during the reaction, adding an organic solvent which contains water present up to 1%, the ratio of NCO : OH groups being such that a reaction product having free NCO groups results, and when the NCO content is constant, adding an organic solvent containing water present in amount up to 20% of the solution. In a modification a solvent which contains water present up to 1% may be added to one component of the polyisocyanate polyaddition process and the other components added successively. In a typical Example (1) polypropylene glycol was reacted with 4:41-diphenylmethane diisocyanate and a solution of N-methyl diethanolamine in acetone containing 0.22% water then added and heated. After two hours more acetone containing 3% water was added.
GB3497064A 1963-09-19 1964-08-26 Production of polyurethanes Expired GB1071425A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1963F0040800 DE1300273B (en) 1963-09-19 1963-09-19 Process for the preparation of compounds from polyisocyanates and polyhydroxyl compounds using water-containing organic solvents

Publications (1)

Publication Number Publication Date
GB1071425A true GB1071425A (en) 1967-06-07

Family

ID=7098397

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3497064A Expired GB1071425A (en) 1963-09-19 1964-08-26 Production of polyurethanes

Country Status (2)

Country Link
DE (1) DE1300273B (en)
GB (1) GB1071425A (en)

Also Published As

Publication number Publication date
DE1300273B (en) 1969-07-31

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