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US 4,285,876 AGranted
Isocyanate adducts with .beta.-diketones
AssigneeVertac, Inc.
InventorsLuigi Giuffre, Placido M. Spaziante
Life of this patent
Estimating the term…
Abstract
Adducts of low boiling isocyanates with .beta.-diketones which decompose on heating to give the low boiling isocyanates as a condensible vapor; as well as the method of making the adducts and the method of storing and transporting low boiling isocyanates employing said adducts.
Claims13
A process for the production of the adduct of an isocyanate having the formula
- R--N.dbd.C.dbd.O
- wherein R is a member selected from the group consisting of alkyl having from 1 to 10 carbon atoms and alkenyl having 2 to 6 carbon atoms with a .beta.-diketone selected from the group consisting of compounds having the formula ##STR15## wherein R' is lower alkyl and R" is a member selected from the group consisting of lower alkyl, alkoxy, phenyl and when taken together, lower alkylene having 2 to 6 carbon atoms, and decalin-1,8-dione, consisting essentially of the steps of reacting said isocyanate with a .beta.-diketone selected from the group consisting of compounds having the formula ##STR16## wherein R' is lower alkyl and R" is a member selected from the group consisting of lower alkyl, alkoxy, phenyl and when taken together, lower alkylene having 2 to 6 carbon atoms, and decalin-1,8-dione, in a molar ratio of 1:1 to a molar excess of .beta.-diketone at a temperature between 25.degree. C. and 100.degree. C., to form said adduct.
A process for storing and transporting an isocyanate having the formula
- R--N.dbd.C.dbd.O
- wherein R is a member selected from the group consisting of alkyl having from 1 to 10 carbon atoms and alkenyl having from 2 to 6 carbon atoms, consisting of the steps of (1) reacting said isocyanate with a .beta.-diketone selected from the group consisting of compounds having the formula ##STR17## wherein R' is lower alkyl and R" is a member selected from the group consisting of lower alkyl, alkoxy, phenyl and when taken together, lower alkylene having 2 to 6 carbon atoms, and decalin-1,8-dione, or reacting a carbamoyl chloride having the formula ##STR18## with said .beta.-diketone, to form an adduct, (2) maintaining said adduct at temperatures below the decomposition temperature for the time desired, and (3) heating said adduct to decompose the same with evolution of the isocyanate.
Dependencies are inferred from the claim text.