EP0277487A2
Expired / Lapsed
EP
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Storage stable polyisocyanates characterized by allophanate linkages
Assignee: BASF Corp
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Filing: 1988-01-11
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Granted: —
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Expires: 2008-01-11
Abstract
Abstract Organic polyisocyanates characterized by allophonate linkages are prepared by reacting an organic polyisocyanate with a mono- or polyhydric compound in the presence of an organo metal catalyst. The catalyst is then deactivated using a compound such as an inorganic acid, organic acid, organic chloroformate or an organic acid chloride. The isocyanates are useful in preparing polyurethane foams.
Inventors
- 👤 Thirumurti Narayan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 04:30
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7837; C07; C07C; C07C273/00; C07C273/18; C07C273/1809
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
57 words
A process for the preparation of liquid storage stable allophanate polyisocyanate comprising reacting an excess of an organic polyisocyanate with a mono or polyhydric compound in the presence of an organo metal catalyst wherein said catalyst is deactivated by an compound selected from the group consisting of inorganic acids, organic acids, organic chloroformates, and organic acid chlorides.
Claim 2
Dependent Claim
57 words
A process for the preparation of liquid storage stable allophanate polyisocyanate comprising reacting an excess of an organic polyisocyanate with a mono or polyhydric compound in the presence of an organo metal catalyst wherein said catalyst is deactivated by an compound selected from the group consisting of inorganic acids, organic acids, organic chloroformates, and organic acid chlorides.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the organic polyisocyanate is toluene diisocyanate.
Claim 4
Dependent Claim
25 words
The process of claim 1 wherein the monohydric compound is selected from the group consisting of methanol, ethanol, propanol, butanol, pentanol and alkylene adducts thereof.
Claim 5
Dependent Claim
28 words
The process of claim 1 wherein the polyhydric compound is selected from the group consisting of ethylene glycol, propylene glycol, glycerine, 1,4-butanediol, 1,3-butanediol, diethylene glycol and dipropylene glycol.
Claim 6
Dependent Claim
25 words
The process of claim 1 wherein the catalyst is selected from the group consisting of zinc acetylacetonate, cobalt acetylacetonate, nickel acetylacetonate, acetylacetonate and aluminum acetylacetonate.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein the catalyst is deactivated by benzoyl chloride.
References Cited (Backward Citations)
No citation records indexed.
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