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US4385140A
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Modified azulmic acids
Assignee: Bayer AG
•
Filing: 1979-02-12
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Granted: 1983-05-24
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Expires: 1999-02-12
Abstract
Abstract The present invention relates to new modified azulmic acids, several processes for their preparation and their use as intermediate products for the synthesis of numerous products.
Inventors
- 👤 Kuno Wagner
- 👤 Kurt Findeisen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:47
CPC Classifications
C; C08; C08G; C08G73/00; C08G61/00; C08G61/02; C08G61/04
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
72 words
Solid modified azulmic acids, containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR37## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation or one equivalent of a metal cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR38##
Claim 2
Dependent Claim
72 words
Solid modified azulmic acids, containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR37## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation or one equivalent of a metal cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR38##
Claim 3
Dependent Claim
37 words
An acid addition salt of the modified azulmic acid of claim 1 prepared by addition of a proton of an inorganic or organic acid onto an amino group or other suitable group in said modified azulmic acid.
Claim 4
Dependent Claim
86 words
An azulmic acid complex compound of solid modified azulmic acids, containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR39## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation or one equivalent of a metal cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR40## and a metal compound or an ammonium salt.
Claim 5
Dependent Claim
86 words
An azulmic acid complex compound of solid modified azulmic acids, containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR39## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation or one equivalent of a metal cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR40## and a metal compound or an ammonium salt.
Claim 6
Dependent Claim
223 words
A mixture comprising solid modified azulmic acids, containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR41## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation or one equivalent of a metal cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR42## and a material selected from the group consisting of wood flour; lignin powder; lignin-sulphonic acids; ammonified lignin-sulphonic acids; humus, humic acids; ammonified humic acids; peat; proteins and their degradation products; algal material; polypeptides; fish-meal; bone-meal; aminoacids; oligopolypeptides; pectins; monosaccharides; disaccharides; aligosaccharides; polysaccharides; hemicelluloses; charcoals and ashes which are obtainable by oxidation of organic substances formed by photosynthesis or of customary fuels; metallic silicates; silicon dioxides; silicic acids and salts thereof; silica gels; clay minerals; mica; metallic and ammonium carbonates; phosphorite; metallic and ammonium phosphates; metallic and ammonium sulphates; metallic oxides; aminoplast condensates; polymeric quinones; addition products and condensation products of quinones with amines, ammonia, and aldehydes; crosslinked gelatin; urea/formaldehyde resin flakes; formose sugar mixtures prepared from formaldehyde; sparingly soluble cane sugar complexes; hexamethylene-tetramine; hexahydrotriazines; superphosphate; basic slag; Rhenania phosphate; calcium cyanamide; calcium ammonium nitrate; Leuna saltpeter; potassium nitrate; ammonium nitrate; metal hydroxides; and cobalt molybdate; and mixtures thereof.
Claim 7
Dependent Claim
223 words
A mixture comprising solid modified azulmic acids, containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR41## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation or one equivalent of a metal cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR42## and a material selected from the group consisting of wood flour; lignin powder; lignin-sulphonic acids; ammonified lignin-sulphonic acids; humus, humic acids; ammonified humic acids; peat; proteins and their degradation products; algal material; polypeptides; fish-meal; bone-meal; aminoacids; oligopolypeptides; pectins; monosaccharides; disaccharides; aligosaccharides; polysaccharides; hemicelluloses; charcoals and ashes which are obtainable by oxidation of organic substances formed by photosynthesis or of customary fuels; metallic silicates; silicon dioxides; silicic acids and salts thereof; silica gels; clay minerals; mica; metallic and ammonium carbonates; phosphorite; metallic and ammonium phosphates; metallic and ammonium sulphates; metallic oxides; aminoplast condensates; polymeric quinones; addition products and condensation products of quinones with amines, ammonia, and aldehydes; crosslinked gelatin; urea/formaldehyde resin flakes; formose sugar mixtures prepared from formaldehyde; sparingly soluble cane sugar complexes; hexamethylene-tetramine; hexahydrotriazines; superphosphate; basic slag; Rhenania phosphate; calcium cyanamide; calcium ammonium nitrate; Leuna saltpeter; potassium nitrate; ammonium nitrate; metal hydroxides; and cobalt molybdate; and mixtures thereof.
Claim 8
Dependent Claim
129 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR43## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR44## comprising treating in an aqueous medium with an organic or inorganic acid an azulmic acid prepared by aqueous polymerization of hydrocyanic acid, wherein the treatment is conducted between 0° C. to 200° C. and from 1 to 4 mols of organic or inorganic acid are used per mol of azulmic acid prepared by aqueous polymerization of hydrocyanic acid.
Claim 9
Dependent Claim
129 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR43## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR44## comprising treating in an aqueous medium with an organic or inorganic acid an azulmic acid prepared by aqueous polymerization of hydrocyanic acid, wherein the treatment is conducted between 0° C. to 200° C. and from 1 to 4 mols of organic or inorganic acid are used per mol of azulmic acid prepared by aqueous polymerization of hydrocyanic acid.
Claim 10
Dependent Claim
161 words
The process of claim 5, wherein the treating is conducted in the presence of a material selected from the group consisting of wood flour; lignin powder; lignin-sulphonic acids; ammonified lignin-sulphonic acids; humus, humic acids; ammonified humic acids; peat; proteins and their degradation products; algal material; polypeptides; fish-meal; bone-meal; aminoacids; oligopolypeptides; pectins; monosaccharides; disaccharides; aligosaccharides; polysaccharides; hemicelluloses; charcoals and ashes which are obtainable by oxidation of organic substances formed by photosynthesis or of customary fuels; metallic silicates; silicon dioxides; silicic acids and salts thereof; silica gels; clay minerals; mica; metallic and ammonium carbonates; phosphorite; metallic and ammonium phosphates; metallic and ammonium sulphates; metallic oxides; aminoplast condensates; polymeric quinones; addition products and condensation products of quinones with amines, ammonia, and aldehydes; crosslinked gelatin; urea/formaldehyde resin flakes; formose sugar mixtures prepared from formaldehyde; sparingly soluble cane sugar complexes; hexamethylene-tetramine; hexahydrotriazines; superphosphate; basic slag; Rhenania phosphate; calcium cyanamide; calcium ammonium nitrate; Leuna saltpeter; potassium nitrate; ammonium nitrate; metal hydroxides; and cobalt molybdate; and mixtures thereof.
Claim 11
Dependent Claim
16 words
The process of claim 5, further comprising treating the resultant product with an acid or base.
Claim 12
Dependent Claim
127 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR45## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR46## comprising treating in an aqueous medium, with bases or basic salts an azulmic acid prepared by aqueous polymerization of hydrocyanic acid wherein the treatment is conducted between 0° and 200° C. and from 1 to 4 mols of base or basic salt are used per mol of azulmic acid prepared by aqueous polymerization of hydrocyanic acid.
Claim 13
Dependent Claim
127 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR45## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR46## comprising treating in an aqueous medium, with bases or basic salts an azulmic acid prepared by aqueous polymerization of hydrocyanic acid wherein the treatment is conducted between 0° and 200° C. and from 1 to 4 mols of base or basic salt are used per mol of azulmic acid prepared by aqueous polymerization of hydrocyanic acid.
Claim 14
Dependent Claim
161 words
The process of claim 8, wherein the treating is conducted in the presence of a material selected from the group consisting of wood flour; lignin powder; lignin-sulphonic acids; ammonified lignin-sulphonic acids; humus; humic acids; ammonified humic acids; peat; proteins and their degradation products; algal material; polypeptides; fish-meal; bone-meal; aminoacids; oligopolypeptides; pectins; monosaccharides; disaccharides; aligosaccharides; polysaccharides; hemicelluloses; charcoals and ashes which are obtainable by oxidation of organic substances formed by photosynthesis or of customary fuels; metallic silicates; silicon dioxides; silicic acids and salts thereof; silica gels; clay minerals; mica; metallic and ammonium carbonates; phosphorite; metallic and ammonium phosphates; metallic and ammonium sulphates; metallic oxides; aminoplast condensates; polymeric quinones; addition products and condensation products of quinones with amines, ammonia, and aldehydes; crosslinked gelatin; urea/formaldehyde resin flakes; formose sugar mixtures prepared from formaldehyde; sparingly soluble cane sugar complexes; hexamethylene-tetramine; hexahydrotriazines; superphosphate; basic slag; Rhenania phosphate; calcium cyanamide; calcium ammonium nitrate; Leuna saltpeter; potassium nitrate; ammonium nitrate; metal hydroxides; and cobalt molybdate; and mixtures thereof.
Claim 15
Dependent Claim
16 words
The process of claim 8, further comprising treating the resultant product with an acid or base.
Claim 16
Dependent Claim
108 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR47## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR48## comprising treating with water for 4 to 60 hours at a pH of from 6 to 6.5 and at a temperature of from 60° to 150° C. an azulmic acid prepared by aqueous polymerization of hydrocyanic acid.
Claim 17
Dependent Claim
108 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR47## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR48## comprising treating with water for 4 to 60 hours at a pH of from 6 to 6.5 and at a temperature of from 60° to 150° C. an azulmic acid prepared by aqueous polymerization of hydrocyanic acid.
Claim 18
Dependent Claim
16 words
The process of claim 11, further comprising treating the resultant product with an acid or base.
Claim 19
Dependent Claim
136 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR49## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR50## comprising treating azulmic acid in an aqueous medium, with the ashes produced by the combustion of fir, broom, Serbian spruce, oak, straw, birch, beech, willow, tobacco leaves, tobacco stalks, cereals, fungi, apples, carrots, potato tubers and the leaves of white cabbage, an azulmic acid prepared by aqueous polymerization of hydrocyanic acid, wherein the treatment is conducted at a temperature of from 50° to 150° C.
Claim 20
Dependent Claim
136 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR49## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR50## comprising treating azulmic acid in an aqueous medium, with the ashes produced by the combustion of fir, broom, Serbian spruce, oak, straw, birch, beech, willow, tobacco leaves, tobacco stalks, cereals, fungi, apples, carrots, potato tubers and the leaves of white cabbage, an azulmic acid prepared by aqueous polymerization of hydrocyanic acid, wherein the treatment is conducted at a temperature of from 50° to 150° C.
Claim 21
Dependent Claim
16 words
The process of claim 13, further comprising treating the resultant product with an acid or base.
Claim 22
Dependent Claim
128 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR51## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR52## comprising treating in an aqueous medium with a metal salt an azulmic acid prepared by aqueous polymerization of hydrocyanic acid wherein the treatment is conducted at a temperature of from 0° to 150° C., and from 1 to 2 mols of metal salt are used per mol of azulmic acid prepared by aqueous polymerization of hydrocyanic acid.
Claim 23
Dependent Claim
128 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR51## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR52## comprising treating in an aqueous medium with a metal salt an azulmic acid prepared by aqueous polymerization of hydrocyanic acid wherein the treatment is conducted at a temperature of from 0° to 150° C., and from 1 to 2 mols of metal salt are used per mol of azulmic acid prepared by aqueous polymerization of hydrocyanic acid.
Claim 24
Dependent Claim
21 words
The process of claim 15, wherein the treatment is conducted in the presence of oxidizing agents, organic acids, or mixtures thereof.
Claim 25
Dependent Claim
16 words
The process of claim 15, further comprising treating the resultant product with an acid or base.
Claim 26
Dependent Claim
133 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR53## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR54## comprising treating in an aqueous medium with a metal salt complex of a stabilized azulmic acid, an azulmic acid prepared by aqueous polymerization of hydrocyanic acid, wherein the treatment is conducted at a temperature of from 0° to 150° C. and from 0.5 to 1 mol of complex is used per mol of azulmic acid prepared by aqueous polymerization of hydrocyanic acid.
Claim 27
Dependent Claim
133 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR53## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR54## comprising treating in an aqueous medium with a metal salt complex of a stabilized azulmic acid, an azulmic acid prepared by aqueous polymerization of hydrocyanic acid, wherein the treatment is conducted at a temperature of from 0° to 150° C. and from 0.5 to 1 mol of complex is used per mol of azulmic acid prepared by aqueous polymerization of hydrocyanic acid.
Claim 28
Dependent Claim
16 words
The process of claim 18, further comprising treating the resultant product with an acid or base.
Claim 29
Dependent Claim
139 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR55## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR56## comprising polymerizing hydrocyanic acid under hydrolyzing conditions in an aqueous medium in the presence of basic catalysts wherein the polymerization is conducted between 40° and 60° C. up to a conversion of about 60% of the acid, then at between 80° to 90° C. to a conversion of about 90 to 95% of the acid and then at 100° C. for several hours until completion of the reaction.
Claim 30
Dependent Claim
139 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR55## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR56## comprising polymerizing hydrocyanic acid under hydrolyzing conditions in an aqueous medium in the presence of basic catalysts wherein the polymerization is conducted between 40° and 60° C. up to a conversion of about 60% of the acid, then at between 80° to 90° C. to a conversion of about 90 to 95% of the acid and then at 100° C. for several hours until completion of the reaction.
Claim 31
Dependent Claim
161 words
The process of claim 20, wherein the polymerization is conducted in the presence of a material selected from the group consisting of wood flour; lignin powder; lignin-sulphonic acids; ammonified lignin-sulphonic acids; humus, humic acids; ammonified humic acids; peat; proteins and their degradation products; algal material; polypeptides; fish-meal; bone-meal; aminoacids; oligopolypeptides; pectins; monosaccharides; disaccharides; aligosaccharides; polysaccharides; hemicelluloses; charcoals and ashes which are obtainable by oxidation of organic substances formed by photosynthesis or of customary fuels; metallic silicates; silicon dioxides; silicic acids and salts thereof; silica gels; clay minerals; mica; metallic and ammonium carbonates; phosphorite; metallic and ammonium phosphates; metallic and ammonium sulphates; metallic oxides; aminoplast condensates; polymeric quinones; addition products and condensation products of quinones with amines, ammonia, and aldehydes; crosslinked gelatin; urea/formaldehyde resin flakes; formose sugar mixtures prepared from formaldehyde; sparingly soluble cane sugar complexes; hexamethylene-tetramine; hexahydrotriazines; superphosphate; basic slag; Rhenania phosphate; calcium cyanamide; calcium ammonium nitrate; Leuna saltpeter; potassium nitrate; ammonium nitrate; metal hydroxides; and cobalt molybdate; and mixtures thereof.
Claim 32
Dependent Claim
16 words
The process of claim 20, further comprising treating the resultant product with an acid or base.
Claim 33
Dependent Claim
91 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR57## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation or one equivalent of a metal cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR58## comprising reacting said modified azulmic acids with a base in an aqueous medium.
Claim 34
Dependent Claim
91 words
A process for the preparation of solid modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR57## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation or one equivalent of a metal cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR58## comprising reacting said modified azulmic acids with a base in an aqueous medium.
Claim 35
Dependent Claim
16 words
The process of claim 23, further comprising replacing the resultant cation by treatment with metal salts.
Claim 36
Dependent Claim
16 words
The process of claim 23, further comprising treating the resultant product with an acid or base.
Claim 37
Dependent Claim
93 words
A process for the preparation of modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR59## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation or one equivalent of a metal cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR60## comprising reacting said modified azulmic acids with an organic or inorganic acid in an aqueous medium.
Claim 38
Dependent Claim
93 words
A process for the preparation of modified azulmic acids containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR59## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation or one equivalent of a metal cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR60## comprising reacting said modified azulmic acids with an organic or inorganic acid in an aqueous medium.
Claim 39
Dependent Claim
14 words
The process of claim 26, further comprising treating the resultant product with a base.
Claim 40
Dependent Claim
98 words
In the preparation of an isocyanate-polyaddition product by reacting an organic isocyanate with an active hydrogen containing material, the improvement wherein modified azulmic acids, containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR61## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation or one equivalent of a metal cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR62## are included in the reaction mixture.
Claim 41
Dependent Claim
98 words
In the preparation of an isocyanate-polyaddition product by reacting an organic isocyanate with an active hydrogen containing material, the improvement wherein modified azulmic acids, containing from 0.5 to 55 percent by weight of ionic groups of the formula ##STR61## wherein R represents hydrogen, ammonium, one equivalent of a protonated or quaternized organic nitrogen base or of a sulphonium cation or one equivalent of a metal cation, and containing from 0.5 to 15 percent by weight of groups formed by decarboxylation reactions, said groups formed by decarboxylation reactions being of the formula ##STR62## are included in the reaction mixture.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |