US3922232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent colorants
Assignee: BAYOU STATE ENTERPRISES Inc A CORP OF
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Filing: 1973-11-23
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Granted: 1975-11-25
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Expires: 1993-11-23
Abstract
Abstract Improved fluorescent pigments which are particularly useful for coloring thermoplastics are described. The matrix or carrier resin for the fluorescent dye(s) comprises resinous precondensates which are soluble in dimethylformamide and are derived from certain polyfunctional acids and alcohols, and preferably from phthalic anhydride or its esters and pentaerythritol or tris-(2-hydroxyethyl) isocyanurate.
Inventors
- 👤 Alan K Schein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:39
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08K; C08K5/00; C08K5/0008; C08K5/0041; C08J2467/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
106 words
A FLUORESCENT COLORANT COMPRISING PARTICLES OF A RESINOUS PRECONDENSATE COLORED WITH A FLUORESCENT DYESTUFF, SAID PRECONDENSATE BEING A NONTACKY SOLID SOLUBLE IN ACETONE AND DIMETHYLFORMAMIDE AT 25*C, HAVING A SOFTENING POINT OF AT LEASST ABOUT 70*C. AND BEING DERIVED FROM ABOUT 0.5 TO ABOUT 2.0 MOLES OF AT LEAST ONE ALIPHATIC, AROMATIC OR ALICYCLIC POLYFUNCTIONAL ACID COMPONENT SELECTED FROM THR GORUP CONSISTING OF CARBOXYLIC ACIDS, ESTERS AND ANHYDRIDES AND ONE MOLE OF AT LEAST ONE POLYHYDROXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC POLYHYDROOXY COMPOUNDS AND TRIS-(HYDROXYALKYL) ISOCYANURATES, AT LAST ONE OF SAID POLYFUNCTIONAL ACID COMPONENT OR POLYHYDROXY COMPOUND HAVING A FUNCTIONALITY GREATER THAN 2.
Claim 2
Dependent Claim
106 words
A FLUORESCENT COLORANT COMPRISING PARTICLES OF A RESINOUS PRECONDENSATE COLORED WITH A FLUORESCENT DYESTUFF, SAID PRECONDENSATE BEING A NONTACKY SOLID SOLUBLE IN ACETONE AND DIMETHYLFORMAMIDE AT 25*C, HAVING A SOFTENING POINT OF AT LEASST ABOUT 70*C. AND BEING DERIVED FROM ABOUT 0.5 TO ABOUT 2.0 MOLES OF AT LEAST ONE ALIPHATIC, AROMATIC OR ALICYCLIC POLYFUNCTIONAL ACID COMPONENT SELECTED FROM THR GORUP CONSISTING OF CARBOXYLIC ACIDS, ESTERS AND ANHYDRIDES AND ONE MOLE OF AT LEAST ONE POLYHYDROXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC POLYHYDROOXY COMPOUNDS AND TRIS-(HYDROXYALKYL) ISOCYANURATES, AT LAST ONE OF SAID POLYFUNCTIONAL ACID COMPONENT OR POLYHYDROXY COMPOUND HAVING A FUNCTIONALITY GREATER THAN 2.
Claim 3
Dependent Claim
13 words
The colorant of claim 1 wherein at least one acid component is aromatic.
Claim 4
Dependent Claim
13 words
The colorant of claim 2 wherein the aromatic acid component is phthalic anhydride.
Claim 5
Dependent Claim
14 words
The colorant of claim 2 wherein the aromatic acid component is a dialkyl phthalate.
Claim 6
Dependent Claim
11 words
The colorant of claim 2 wherein the polyhydroxy compound is pentaerythritol.
Claim 7
Dependent Claim
12 words
The colorant of claim 2 wherein the polyhydroxy compound is tris(2-hydroxyethyl) isocyanurate.
Claim 8
Dependent Claim
13 words
The colorant of claim 2 wherein the precondensate is modified with a polyamine.
Claim 9
Dependent Claim
127 words
A process for producing a fluorescent colorant comprising a. partially condensing about 0.5 to about 2.0 moles of at least one aliphatic, aromatic or alicyclic polyfunctional acid component selected from the group consisting of carboxylic acids, esters and anhydrides with one mole of at least one polyhydroxy compound selected from the group consisting of aliphatic polyhydroxy compounds and tris-(hydroxyalkyl) isocyanurates, at least one of said polyfunctional acid component or polyhydroxy compound having a functionality greater than 2, under controlled condensation conditions to produce a resinous precondensate which is a nontacky solid soluble in acetone and dimethylformamide at 25*C. and has a softening point of at least about 70*C., b. introducing a coloring amount of a fluorescent dyestuff into said precondensate, and c. recovering the fluorescent colored precondensate.
Claim 10
Dependent Claim
127 words
A process for producing a fluorescent colorant comprising a. partially condensing about 0.5 to about 2.0 moles of at least one aliphatic, aromatic or alicyclic polyfunctional acid component selected from the group consisting of carboxylic acids, esters and anhydrides with one mole of at least one polyhydroxy compound selected from the group consisting of aliphatic polyhydroxy compounds and tris-(hydroxyalkyl) isocyanurates, at least one of said polyfunctional acid component or polyhydroxy compound having a functionality greater than 2, under controlled condensation conditions to produce a resinous precondensate which is a nontacky solid soluble in acetone and dimethylformamide at 25*C. and has a softening point of at least about 70*C., b. introducing a coloring amount of a fluorescent dyestuff into said precondensate, and c. recovering the fluorescent colored precondensate.
Claim 11
Dependent Claim
33 words
The process of claim 8 wherein the partial condensation is carried out under molten conditions at a temperature from about 125* to 260*C., and the fluorescent dyestuff is introduced into the molten precondensate.
Claim 12
Dependent Claim
11 words
The process of claim 8 wherein the recovered precondensate is comminuted.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |