US5066824A
Expired / Lapsed
US
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Novel process for the preparation of amine-terminated compounds
Assignee: Bayer Corp
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Filing: 1990-08-03
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Granted: 1991-11-19
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Expires: 2010-08-03
Abstract
Abstract The present invention is directed to a process for preparing amine terminated compounds by reacting a polyfunctional acetoacetic acid ester with either ammonia or an organic compound which contains one or more primary amino groups in the presence of a solvent and an acidic catalyst selected from the group consisting of (i) boron trifuloride etherate and (ii) organic acids having pKa values of from 0.1 to 0.8 with the proviso that if the primary amino group containing compound contains no aromatically bound amino groups, the pKa of said organic acid is from 0.1 to less than 0.7.
Inventors
- 👤 Robson Mafoti
- 👤 Josef Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:29
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/24; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/333; C08G65/33303; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/6795; C08G18/68; C08G65/321; C08G65/325; C08G65/3255; C08G65/331; C08G65/332; C08G65/3322
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
A process for the preparation of an amine-terminated compound comprising reacting a polyfunctional acetoacetic acid ester with either ammonia or an organic compound which contains one or more primary amino groups in the presence of a solvent and an acidic catalyst selected from the group consisting of (i) boron trifluoride etherate and (ii) organic acids having pKa values of from 0.1 to 0.8, with the proviso that if the primary amino group containing compound contains no aromatically bound amino groups, the pKa of said organic acid is from 0.1 to less than 0.7.
Claim 2
Dependent Claim
93 words
A process for the preparation of an amine-terminated compound comprising reacting a polyfunctional acetoacetic acid ester with either ammonia or an organic compound which contains one or more primary amino groups in the presence of a solvent and an acidic catalyst selected from the group consisting of (i) boron trifluoride etherate and (ii) organic acids having pKa values of from 0.1 to 0.8, with the proviso that if the primary amino group containing compound contains no aromatically bound amino groups, the pKa of said organic acid is from 0.1 to less than 0.7.
Claim 3
Dependent Claim
15 words
The process of claim 1, wherein said organic acid is a halogenated organic carboxylic acid.
Claim 4
Dependent Claim
14 words
The process of claim 2, wherein said organic acid is a halogenated acetic acid.
Claim 5
Dependent Claim
12 words
The process of claim 3, wherein said organic acid is trifluoroacetic acid.
Claim 6
Dependent Claim
60 words
The process of claim 1, wherein said polyfunctional acetoacetic acid ester is prepared by reacting a C 1 to C 5 alkyl acetoacetate with a organic compound containing from 2 to 6 hydroxyl groups and having a molecular weight of from 62 to about 12,000, in a ratio such that one mole of acetoacetate is used for each hydroxyl group.
Claim 7
Dependent Claim
59 words
The process of claim 5, wherein said polyfunctional acetoacetic acid ester is prepared by reacting a C 1 to C 5 alkyl acetoacetate with a organic compound containing from 2 to 4 hydroxyl groups and having a molecular weight of from 192 to 8,000, in a ratio such that one mole of acetoacetate is used for each hydroxyl group.
Claim 8
Dependent Claim
13 words
The process of claim 1, wherein said organic compound is an aromatic diamine.
Claim 9
Dependent Claim
31 words
The process of claim 7, wherein said aromatic diamine is selected from the group consisting of toluene diamines, alkyl-substituted toluene diamines, methylenebis(phenyl amines), alkyl-substituted methylenebis(phenyl amines), 1,5-naphthalene diamine, and phenylene diamines.
References Cited (Backward Citations)
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