GB1457206A - Isocyanates - Google Patents

Isocyanates

Info

Publication number
GB1457206A
GB1457206A GB1887674A GB1887674A GB1457206A GB 1457206 A GB1457206 A GB 1457206A GB 1887674 A GB1887674 A GB 1887674A GB 1887674 A GB1887674 A GB 1887674A GB 1457206 A GB1457206 A GB 1457206A
Authority
GB
United Kingdom
Prior art keywords
imidazole
diisocyanate
methylimidazole
benzimidazole
april
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
GB1887674A
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 GB1887674A priority Critical patent/GB1457206A/en
Priority to DD18573475A priority patent/DD119220A5/xx
Priority to IT2290675A priority patent/IT1037773B/en
Priority to JP5242075A priority patent/JPS50151849A/ja
Publication of GB1457206A publication Critical patent/GB1457206A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C265/00—Derivatives of isocyanic acid
    • C07C265/14—Derivatives of isocyanic acid containing at least two isocyanate groups bound to the same carbon skeleton
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

1457206 Stabilizing diphenyl methane diisocyanate IMPERIAL CHEMICAL INDUSTRIES Ltd 9 April 1975 [30 April 1974] 18876/74 Heading C2C The storage stability of a refined diphenylmethane diisocyanate is improved by storing the diisocyanate in contact with an antioxidant and an imidazole. Preferred imidazoles are imidazole, 4-methylimidazole, 2,4-dimethylimidazole, 4,5 - benzimidazole, 4,5 - diphenylimidazole, 2 - thiomethylimidazole, N - methyl- 2 - methylimidazole, 2 - benzylimidazole, 2- phenylimidazole, N - methyl - 4,5 - benzimidazole and 2,2<SP>1</SP>- bis - imidazole and mixtures thereof. The imidazole is preferably present in an amount of 0À001 to 0À25% by weight of the diisocyanate. Specified antioxidants are 2,6 - di - t - butyl - p - cresol, 2,2<SP>1</SP> - dihydroxy - 3,31 - di - t - butyl - 5,5<SP>1</SP>- diphenylmethane, 6 - alpha - methylcyclohexyl - 2,4 - xylenol, distearyl- and dilaurylthiodipropionates and triphenylphosphite.
GB1887674A 1974-04-30 1974-04-30 Isocyanates Expired GB1457206A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB1887674A GB1457206A (en) 1974-04-30 1974-04-30 Isocyanates
DD18573475A DD119220A5 (en) 1974-04-30 1975-04-28
IT2290675A IT1037773B (en) 1974-04-30 1975-04-30 ISOCYANATES
JP5242075A JPS50151849A (en) 1974-04-30 1975-04-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1887674A GB1457206A (en) 1974-04-30 1974-04-30 Isocyanates

Publications (1)

Publication Number Publication Date
GB1457206A true GB1457206A (en) 1976-12-01

Family

ID=10119953

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1887674A Expired GB1457206A (en) 1974-04-30 1974-04-30 Isocyanates

Country Status (4)

Country Link
JP (1) JPS50151849A (en)
DD (1) DD119220A5 (en)
GB (1) GB1457206A (en)
IT (1) IT1037773B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5308568A (en) * 1993-05-20 1994-05-03 Corning Incorporated Extrusion die and method

Also Published As

Publication number Publication date
DD119220A5 (en) 1976-04-12
IT1037773B (en) 1979-11-20
JPS50151849A (en) 1975-12-06

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed