GB1257853A - - Google Patents

Info

Publication number
GB1257853A
GB1257853A GB1257853DA GB1257853A GB 1257853 A GB1257853 A GB 1257853A GB 1257853D A GB1257853D A GB 1257853DA GB 1257853 A GB1257853 A GB 1257853A
Authority
GB
United Kingdom
Prior art keywords
diphenylmethane diisocyanate
aniline
formaldehyde
polyisocyanate
mixture
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
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 filed Critical
Publication of GB1257853A publication Critical patent/GB1257853A/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
    • C07C263/10—Preparation of derivatives of isocyanic acid by reaction of amines with carbonyl halides, e.g. with phosgene
    • 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
    • C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
    • C08G12/04—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C08G12/06—Amines
    • C08G12/08—Amines aromatic
    • 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
    • C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
    • C08G12/40—Chemically modified polycondensates

Abstract

1,257,853. 4,4-Diisocyanatodiphenyl methane and composition. SUMITOMO CHEMICAL CO. Ltd. 24 June, 1969 [1 Feb., 1969], No. 31963/69. Heading C2C. A polyamine mixture suitable for producing simultaneously 4,4<SP>1</SP>-diphenylmethane diisocyanate and a polyisocyanate composition preferably containing 50-60% by weight of 4,41-diphenylmethane diisocyanate and the remainder polyisocyanates comprises reacting aniline with formaldehyde in a ratio of 1.5 to 2À3 moles of aniline per mole of formaldehyde in the presence of a mineral acid of 0À7 to 0À95 times the stoichiometric amount of aniline at an initial temperature of 15 to 50‹ C. for at least one hour and at a final temperature of more than 50‹ C. to complete the reaction. Subsequently the polyamine mixture may be phosgenated and 4,4<SP>1</SP>-diphenylmethane diisocyanate and the polyisocyanate composition separated from the resulting polyisocyanate mixture or the separation and phosgenation procedures may be reversed.
GB1257853D 1969-02-01 1969-06-24 Expired GB1257853A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP745569A JPS5016355B1 (en) 1969-02-01 1969-02-01

Publications (1)

Publication Number Publication Date
GB1257853A true GB1257853A (en) 1971-12-22

Family

ID=11666283

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1257853D Expired GB1257853A (en) 1969-02-01 1969-06-24

Country Status (8)

Country Link
JP (1) JPS5016355B1 (en)
BE (1) BE735258A (en)
CH (1) CH541544A (en)
DE (1) DE1932526B2 (en)
ES (1) ES368930A1 (en)
FR (1) FR2030234A1 (en)
GB (1) GB1257853A (en)
NL (1) NL144590B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2238379C3 (en) * 1972-08-04 1984-08-30 Bayer Ag, 5090 Leverkusen Process for the production of polyamines
DE2356828C2 (en) * 1973-11-14 1982-10-21 Bayer Ag, 5090 Leverkusen Process for the production of polyamines and their use as starting material for the production of polyisocyanates

Also Published As

Publication number Publication date
FR2030234A1 (en) 1970-11-13
ES368930A1 (en) 1971-05-01
DE1932526A1 (en) 1970-09-10
NL144590B (en) 1975-01-15
CH541544A (en) 1973-09-15
BE735258A (en) 1969-12-01
NL6909874A (en) 1970-08-04
JPS5016355B1 (en) 1975-06-12
DE1932526B2 (en) 1973-01-18

Similar Documents

Publication Publication Date Title
GB1231980A (en)
GB1303201A (en)
GB1205486A (en) Process for obtaining non-volatile, low molecular weight mono- and polyisocyanates containing tertiary amino groups
ZA85277B (en) A process for the production of mixed polyurethane prepolymers
GB1145952A (en) Isocyanate-containing oxadiazinones and the preparation thereof
AU532047B2 (en) Modified isocyanate
GB1516517A (en) Process for the production of polyureas or polyurethane-polyureas
GB1474984A (en) Isocyanates
GB1263439A (en) A process for the production of isocyanates
GB1147695A (en) Process for the production of non-foaming urethane type polymers
GB1165830A (en) Process for the preparation of Polyurethanes
GB1146457A (en) Polyisocyanate compositions
EP0043651A3 (en) Polyisocyanates
GB1514445A (en) Diisocyanates and their use in the preparation of polyurethane elastomers
GB1257853A (en)
ES431902A1 (en) Process for the production of polyisocyanates
IE39672L (en) Preparation of polyisocyanates which are blocked with¹dialkyl malonates
GB1287192A (en) Manufacture of 4,4&lt;1&gt;-diphenylmethane diisocyanate and a mixture of methylene-bridged di(phenylisocyanates) and poly(phenylisocyanates)
ES8708245A1 (en) Prepolymer formation.
IE39551L (en) Iminoimidazolidindione polyisocyanates
GB1162155A (en) A process for the production of Xylylene Diisocyanate
GB1222467A (en) Continuous methylenedianiline process
ES409017A1 (en) Preparation of oil-modified polymers from a polyisocyanate composition
ES487339A1 (en) Polyisocyanates, process for their preparation and their use.
GB1423993A (en) Process for the crystallisation of diphenylmethane diisocyanate from a crude undistilled polyisocyanate mixture

Legal Events

Date Code Title Description
414A Case decided by the comptroller ** specification amended (sect. 14/1949)
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee