GB1094980A - Process for treating organic diisocyanates - Google Patents

Process for treating organic diisocyanates

Info

Publication number
GB1094980A
GB1094980A GB5287365A GB5287365A GB1094980A GB 1094980 A GB1094980 A GB 1094980A GB 5287365 A GB5287365 A GB 5287365A GB 5287365 A GB5287365 A GB 5287365A GB 1094980 A GB1094980 A GB 1094980A
Authority
GB
United Kingdom
Prior art keywords
solution
diisocyanate
diisocyanates
pretreated
manufacture
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
GB5287365A
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.)
Monsanto Co
Original Assignee
Monsanto Co
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 Monsanto Co filed Critical Monsanto Co
Publication of GB1094980A publication Critical patent/GB1094980A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C263/00—Preparation of derivatives of isocyanic acid
    • C07C263/18—Separation; Purification; Stabilisation; Use of additives
    • C07C263/20—Separation; Purification
    • 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
    • C08G18/16—Catalysts
    • C08G18/22—Catalysts containing metal compounds
    • C08G18/24—Catalysts containing metal compounds of tin
    • C08G18/244—Catalysts containing metal compounds of tin tin salts of carboxylic acids
    • C08G18/246—Catalysts containing metal compounds of tin tin salts of carboxylic acids containing also tin-carbon bonds
    • 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
    • C08G18/40—High-molecular-weight compounds
    • 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
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
    • C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

In the manufacture of fibre-forming elastomeric polyurethanes by processes involving the addition of a solution of an organic diisocyanate to a polymeric diol, the diisocyanate solution is pretreated with an acid of the formula RCOOH, in which R denotes an alkyl radical of 1-3 carbon atoms, in a proportion of about 0.001-1%, based on the diisocyanate. The pretreatment nullifies the tendency for gel-formation to occur during the manufacture of the polyurethane. An example is given in which a solution of p,p1-diphenylmethane diisocyanate in dimethyl formamide is pretreated with acetic acid and then reacted with a solution of a mixture of 80/20 mol. per cent polyethylene/propylene adipate of molecular weight 1800 in the presence of dibutyl tin dilaurate, whereafter the prepolymer solution so obtained is extended with 1,4-bis(methylamino)benzene. A number of other diisocyanates which may be pretreated are specified.ALSO:Solutions of organic diisocyanates are treated with an acid of the formula RCOOH, in which R denotes an alkyl radical of 1-3 carbon atoms, in a proportion of about 0.001-1%, based on the diisocyanate. The treatment nullifies the tendency for gel-formation to occur when the solutions are used in the manufacture of polyurethanes (see Division C3). An example is given of the treatment of p,p1-diphenyl methane diisocyanate in dimethyolformamide solution with acetic acid. A number of other diisocyanates which may be treated are also specified.
GB5287365A 1964-12-17 1965-12-13 Process for treating organic diisocyanates Expired GB1094980A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US41921764A 1964-12-17 1964-12-17

Publications (1)

Publication Number Publication Date
GB1094980A true GB1094980A (en) 1967-12-13

Family

ID=23661296

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5287365A Expired GB1094980A (en) 1964-12-17 1965-12-13 Process for treating organic diisocyanates

Country Status (5)

Country Link
BE (1) BE673934A (en)
DE (1) DE1280856B (en)
FR (1) FR1461024A (en)
GB (1) GB1094980A (en)
LU (1) LU50069A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2184592A1 (en) * 1972-05-12 1973-12-28 Olin Corp
EP0538500A1 (en) * 1991-10-19 1993-04-28 Basf Corporation Process for the preparation of polymeric methylendiphenylene diisocyanate having reduced color and chloride content

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2184592A1 (en) * 1972-05-12 1973-12-28 Olin Corp
EP0538500A1 (en) * 1991-10-19 1993-04-28 Basf Corporation Process for the preparation of polymeric methylendiphenylene diisocyanate having reduced color and chloride content

Also Published As

Publication number Publication date
BE673934A (en) 1966-06-17
LU50069A1 (en) 1966-06-15
FR1461024A (en) 1966-12-02
DE1280856B (en) 1968-10-24

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