US4022709A
Expired / Lapsed
US
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Phosphorescent materials
Assignee: Post Office
•
Filing: 1975-01-22
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Granted: 1977-05-10
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Expires: 1995-01-22
Abstract
Abstract Phosphorescent materials and solutions suitable for their preparation, the solutions comprising a phosphorescence activator and a soluble condensation product capable of further reaction to form an insoluble condensation product, the latter being one that does not absorb ultraviolet radiation in the absorption range of the activator.
Inventors
- 👤 Berkeley Michael Ferro
- 👤 Rodney Edwin Spratling
- 👤 Aubrey Douglas Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:16
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/102; C09D11/103; C09D11/50; C09K; C09K11/00; C09K11/06
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
102 words
A composition consisting essentially of an aqueous solution, having a pH within the range of from 6 to 9.5 of a phosphorescence activator and a soluble precondensate obtained by a reaction between formaldehyde and an amino compound, the soluble precondensate being capable of further reaction in the absence of the phosphorescence activator whereby there is formable an insoluble condensation product that does not substantially absorb ultraviolet radiation at any wavelength at which the phosphorescence activator substantially absorbs ultraviolet radiation, and being capable of such further reaction in the presence of the phosphorescence activator whereby there is formed a phosphorescent insoluble condensation product.
Claim 2
Dependent Claim
102 words
A composition consisting essentially of an aqueous solution, having a pH within the range of from 6 to 9.5 of a phosphorescence activator and a soluble precondensate obtained by a reaction between formaldehyde and an amino compound, the soluble precondensate being capable of further reaction in the absence of the phosphorescence activator whereby there is formable an insoluble condensation product that does not substantially absorb ultraviolet radiation at any wavelength at which the phosphorescence activator substantially absorbs ultraviolet radiation, and being capable of such further reaction in the presence of the phosphorescence activator whereby there is formed a phosphorescent insoluble condensation product.
Claim 3
Dependent Claim
41 words
A composition as claimed in claim 1, wherein the insoluble condensation product formable by further reaction in the absence of the phosphorescence activator does not substantially absorb ultraviolet radiation at any wavelength within the range of from 250 to 380 nm.
Claim 4
Dependent Claim
27 words
A composition as claimed in claim 1, wherein the soluble precondensate has been obtained by the reaction of the amino compound, in a molar excess, with formaldehyde.
Claim 5
Dependent Claim
31 words
A composition as claimed in claim 3, wherein the soluble precondensate is the product of the reaction of from about 1.1 to about 1.5 moles of melamine per mole of formaldehyde.
Claim 6
Dependent Claim
41 words
A composition as claimed in claim 1, wherein the phosphorescence activator is selected from the group consisting of aromatic amines, aromatic carbonyl compounds, aromatic carboxylic acids and their salts, aromatic sulphonic acids and their salts, aromatic ethers, and aromatic hydroxy compounds.
Claim 7
Dependent Claim
26 words
A composition as claimed in claim 1, wherein the phosphorescence activator is selected from carbazole sulphonic acid and salts thereof, and p-aminobenzoic acid and salts thereof.
Claim 8
Dependent Claim
24 words
A composition as claimed in claim 1, also containing at least one adjuvant selected from the group consisting of fillers, binders, pigments and stabilizers.
Claim 9
Dependent Claim
79 words
A process for the preparation of a composition as claimed in claim 1, which includes partially condensing formaldehyde and amino compound components, in aqueous solution at a pH within the range of from 6 to 9.5 and in the presence of a phosphorescence activator, to form a soluble precondensate capable of further reaction to give a phosphorescent insoluble condensation product that does not substantially absorb ultraviolet radiation at any wavelength at which the phosphorescence activator substantially absorbs ultraviolet radiation.
Claim 10
Dependent Claim
24 words
A process as claimed in claim 8, wherein of said components formaldehyde and an amino compound, the amino component is in a molar excess.
Claim 11
Dependent Claim
31 words
A process as claimed in claim 9, wherein the components comprise formaldehyde and melamine and are reacted in a molar ratio within the range of from about 1:1.1 to about 1:1.5.
Claim 12
Dependent Claim
25 words
A process as claimed in claim 8, wherein the partial condensation is carried out at a pH within the range of from 8.5 to 9.5.
Claim 13
Dependent Claim
23 words
A process as claimed in claim 8, wherein at least one aliphatic alcohol is added to the aqueous solution after the partial condensation.
Claim 14
Dependent Claim
25 words
A process as claimed in claim 12, wherein the alcohol is added until the aqueous solution contains from 10 to 15 volume percent of alcohol.
Claim 15
Dependent Claim
41 words
A process as claimed in claim 8, wherein the phosphorescence activator is selected from the group consisting of aromatic amines, aromatic carbonyl compounds, aromatic carboxylic acids and their salts, aromatic sulphonic acids and their salts, aromatic ethers, and aromatic hydroxyl compounds.
Claim 16
Dependent Claim
26 words
A process as claimed in claim 8, wherein the phosphorescence activator is selected from carbazole sulphonic acid and salts thereof and p-aminobenzoic acid and salts thereof.
Claim 17
Dependent Claim
72 words
A printing ink composition consisting essentially of an aqueous solution of a phosphorescence activator and a soluble precondensate obtained by reacting formaldehyde with a molar excess of an amino compound, which soluble precondensate is capable of further reaction in the presence of the phosphorescence activator whereby there is formable a phosphorescent insoluble condensation product that does not substantially absorb ultraviolet radiation at any wavelength at which the phosphorescence activator absorbs ultraviolet radiation.
Claim 18
Dependent Claim
72 words
A printing ink composition consisting essentially of an aqueous solution of a phosphorescence activator and a soluble precondensate obtained by reacting formaldehyde with a molar excess of an amino compound, which soluble precondensate is capable of further reaction in the presence of the phosphorescence activator whereby there is formable a phosphorescent insoluble condensation product that does not substantially absorb ultraviolet radiation at any wavelength at which the phosphorescence activator absorbs ultraviolet radiation.
Claim 19
Dependent Claim
25 words
A printing ink composition as claimed in claim 16, wherein the soluble precondensate has been obtained by reacting formaldehyde with a molar excess of melamine.
Claim 20
Dependent Claim
33 words
A printing ink composition as claimed in claim 17, wherein the soluble precondensate is the product of the reaction of from about 1.1 to about 1.5 moles of melamine per mole of formaldehyde.
Claim 21
Dependent Claim
20 words
A printing ink composition as claimed in claim 16, having a pH within the range of from 8.5 to 9.5
Claim 22
Dependent Claim
18 words
A printing ink composition as claimed in claim 19, containing sodium carbonate and sodium borate as a buffer.
Claim 23
Dependent Claim
14 words
A printing ink composition as claimed in claim 16, containing at least one stabilizer.
Claim 24
Dependent Claim
16 words
A printing ink composition as claimed in claim 21, wherein the stabilizer is an aliphatic alcohol.
Claim 25
Dependent Claim
25 words
A printing ink composition as claimed in claim 22, wherein the aqueous solution contains from about 10 to about 15 percent by volume of alcohol.
Claim 26
Dependent Claim
44 words
A printing ink composition as claimed in claim 16, wherein the phosphorescence activator is selected from the group consisting of aromatic amines, aromatic carbonyl compounds, aromatic carboxylic acids and their salts, aromatic sulphonic acids and their salts, aromatic ethers, and aromatic hydroxy carbazole compounds.
Claim 27
Dependent Claim
28 words
A printing ink composition as claimed in claim 16, wherein the phosphorescence activator is selected from carbazole sulphonic acid and salts thereof, and p-aminobenzoic acid and salts thereof.
Claim 28
Dependent Claim
46 words
A printing ink composition consisting essentially of an aqueous solution, having a pH within the range of from 8.5 to 9.5, of a phosphorescence activator and a soluble melamine-formaldehyde precondensate, and including a stabilizing amount of an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 29
Dependent Claim
46 words
A printing ink composition consisting essentially of an aqueous solution, having a pH within the range of from 8.5 to 9.5, of a phosphorescence activator and a soluble melamine-formaldehyde precondensate, and including a stabilizing amount of an aliphatic alcohol having from 1 to 4 carbon atoms.
Claim 30
Dependent Claim
34 words
A printing ink composition consisting essentially of an aqueous solution of a phosphorescence activator and a soluble melamine-formaldehyde precondensate in the form of a mixture of species selected from monomeric and oligomeric methyloated melamines.
Claim 31
Dependent Claim
34 words
A printing ink composition consisting essentially of an aqueous solution of a phosphorescence activator and a soluble melamine-formaldehyde precondensate in the form of a mixture of species selected from monomeric and oligomeric methyloated melamines.
Claim 32
Dependent Claim
87 words
A paper-coating composition which comprises (a) an aqueous coating mix of pigment and binder and (b) an aqueous solution, having a pH within the range of from 6 to 8, of a phosphorescence activator and a soluble precondensate of formaldehyde and an amino compound, which soluble precondensate is capable of further reaction in the presence of the phosphorescence activator whereby there is formable a phosphorescent insoluble condensation product that does not substantially absorb ultraviolet radiation at any wavelength at which the phosphorescence activator substantially absorbs ultraviolet radiation.
Claim 33
Dependent Claim
87 words
A paper-coating composition which comprises (a) an aqueous coating mix of pigment and binder and (b) an aqueous solution, having a pH within the range of from 6 to 8, of a phosphorescence activator and a soluble precondensate of formaldehyde and an amino compound, which soluble precondensate is capable of further reaction in the presence of the phosphorescence activator whereby there is formable a phosphorescent insoluble condensation product that does not substantially absorb ultraviolet radiation at any wavelength at which the phosphorescence activator substantially absorbs ultraviolet radiation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |