US4346186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for fixing photo-induced colored derivatives of spiropyrans and compositions therefor
Assignee: Armstrong World Industries Inc
•
Filing: 1981-09-25
•
Granted: 1982-08-24
•
Expires: 2001-09-25
Abstract
Abstract The present invention relates to processes for fixing photo-induced colored derivatives of spiropryans in solvent and solid solutions, and to compositions in which said photo-induced colored derivatives may be fixed, said processes comprising irradiating solvent or solid solutions comprising a spiropryan and an iodonium salt.
Inventors
- 👤 Thomas B. Garrett
- 👤 John E. Herweh
- 👤 Alan B. Magnusson
- 👤 Normal L. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:11
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/56
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
88 words
A process for fixing spiropyrans in their colored form, said process comprising the steps of: preparing a solvent solution comprising (a) a spiropyran having the formula ##STR7## wherein Y represents NR, O or S and each R independently represents H, alkyl or alkenyl, and (b) an iodonium salt, said solvent solution comprising from about 0.1 to about 10 moles of iodonium salt for every one mole of spiropyran, and irradiating said solvent solution with a sufficient dose of ultraviolet radiation to fix said spiropyran in its colored form.
Claim 2
Dependent Claim
88 words
A process for fixing spiropyrans in their colored form, said process comprising the steps of: preparing a solvent solution comprising (a) a spiropyran having the formula ##STR7## wherein Y represents NR, O or S and each R independently represents H, alkyl or alkenyl, and (b) an iodonium salt, said solvent solution comprising from about 0.1 to about 10 moles of iodonium salt for every one mole of spiropyran, and irradiating said solvent solution with a sufficient dose of ultraviolet radiation to fix said spiropyran in its colored form.
Claim 3
Dependent Claim
30 words
The invention as set forth in claim 1 hereof wherein said solvent solution comprises from about 0.5 to about 2 moles of iodonium salt for every one mole of spiropyran.
Claim 4
Dependent Claim
25 words
The invention as set forth in claims 1 or 2 hereof wherein said solvent solution comprises a polymer, said polymer containing no basic nitrogen atoms.
Claim 5
Dependent Claim
15 words
The invention as set forth in claim 3 hereof wherein said polymer is polyvinyl chloride.
Claim 6
Dependent Claim
15 words
The invention as set forth in claim 3 hereof wherein said polymer is polymethyl methacrylate.
Claim 7
Dependent Claim
15 words
The invention as set forth in claim 3 hereof wherein said polymer is polypropyl methacrylate.
Claim 8
Dependent Claim
110 words
A process for fixing spiropyrans in their colored form, said process comprising the steps of: preparing a solvent solution comprising (a) a spiropyran having the formula ##STR8## wherein Y represents NR, O or S and each R independently represents H, alkyl or alkenyl, (b) an iodonium salt, said solvent solution comprising from about 0.1 to about 10 moles of iodonium salt for every one mole of spiropyran, and (c) a polymer, said polymer containing no basic nitrogen atoms, removing the solvent from said solvent solution to give a solid solution, and irradiating said solid solution with a sufficient dose of ultraviolet radiation to fix said spiropyran in its colored form.
Claim 9
Dependent Claim
110 words
A process for fixing spiropyrans in their colored form, said process comprising the steps of: preparing a solvent solution comprising (a) a spiropyran having the formula ##STR8## wherein Y represents NR, O or S and each R independently represents H, alkyl or alkenyl, (b) an iodonium salt, said solvent solution comprising from about 0.1 to about 10 moles of iodonium salt for every one mole of spiropyran, and (c) a polymer, said polymer containing no basic nitrogen atoms, removing the solvent from said solvent solution to give a solid solution, and irradiating said solid solution with a sufficient dose of ultraviolet radiation to fix said spiropyran in its colored form.
Claim 10
Dependent Claim
30 words
The invention as set forth in claim 7 hereof wherein said solvent solution comprises from about 0.5 to about 2 moles of iodonium salt for every one mole of spiropyran.
Claim 11
Dependent Claim
17 words
The invention as set forth in claims 7 or 8 hereof wherein said polymer is polyvinyl chloride.
Claim 12
Dependent Claim
17 words
The invention as set forth in claims 7 or 8 hereof wherein said polymer is polymethyl methacrylate.
Claim 13
Dependent Claim
17 words
The invention as set forth in claims 7 or 8 hereof wherein said polymer is polypropyl methacrylate.
Claim 14
Dependent Claim
85 words
A composition comprising a spiropyran capable of being fixed in its colored form, said composition comprising (a) a solvent, (b) a spiropyran having the formula ##STR9## wherein Y represents NR, O or S and each R independently represents H, alkyl or alkenyl, and (c) an iodonium salt, said iodonium salt being present in from about 0.1 to about 10 moles for every one mole of spiropyran, whereby said spiropyran may be fixed in its colored form by exposure to a sufficient dose of ultraviolet radiation.
Claim 15
Dependent Claim
85 words
A composition comprising a spiropyran capable of being fixed in its colored form, said composition comprising (a) a solvent, (b) a spiropyran having the formula ##STR9## wherein Y represents NR, O or S and each R independently represents H, alkyl or alkenyl, and (c) an iodonium salt, said iodonium salt being present in from about 0.1 to about 10 moles for every one mole of spiropyran, whereby said spiropyran may be fixed in its colored form by exposure to a sufficient dose of ultraviolet radiation.
Claim 16
Dependent Claim
26 words
A composition as set forth in claim 12 hereof comprising from about 0.5 to about 2 moles of iodonium salt for every one mole of spiropyran.
Claim 17
Dependent Claim
21 words
A composition as set forth in claims 12 or 13 hereof, said composition comprising a polymer containing no basic nitrogen atoms.
Claim 18
Dependent Claim
15 words
A composition as set forth in claim 14 hereof wherein said polymer is polyvinyl chloride.
Claim 19
Dependent Claim
15 words
A composition as set forth in claim 14 hereof wherein said polymer is polymethyl methacrylate.
Claim 20
Dependent Claim
15 words
A composition as set forth in claim 14 hereof wherein said polymer is polypropyl methacrylate.
Claim 21
Dependent Claim
94 words
A composition comprising a solid solution of a spiropyran capable of being fixed in its colored form, said composition comprising (a) a spiropyran having the formula ##STR10## wherein Y represents NR, O or S and each R independently represents H, alkyl or alkenyl, (b) an iodonium salt, said iodonium salt being present in from about 0.1 to about 10 moles for every one mole of spiropyran, and (c) a polymer containing no basic nitrogen atoms, whereby said spiropyran may be fixed in its colored form by exposure to a sufficient dose of ultraviolet radiation.
Claim 22
Dependent Claim
94 words
A composition comprising a solid solution of a spiropyran capable of being fixed in its colored form, said composition comprising (a) a spiropyran having the formula ##STR10## wherein Y represents NR, O or S and each R independently represents H, alkyl or alkenyl, (b) an iodonium salt, said iodonium salt being present in from about 0.1 to about 10 moles for every one mole of spiropyran, and (c) a polymer containing no basic nitrogen atoms, whereby said spiropyran may be fixed in its colored form by exposure to a sufficient dose of ultraviolet radiation.
Claim 23
Dependent Claim
26 words
A composition as set forth in claim 18 hereof comprising from about 0.5 to about 2 moles of iodonium salt for every one mole of spiropyran.
Claim 24
Dependent Claim
17 words
A composition as set forth in claims 18 or 19 hereof wherein said polymer is polyvinyl chloride.
Claim 25
Dependent Claim
17 words
A composition as set forth in claims 18 or 19 hereof wherein said polymer is polymethyl methacrylate.
Claim 26
Dependent Claim
17 words
A composition as set forth in claims 18 or 19 hereof wherein said polymer is polypropyl methacrylate.
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) | 1985-08-23 | 1986-02-22 | 1986-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-23 | 1990-02-22 | 1990-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-23 | 1994-02-22 | 1994-08-24 | $7700.00 | Window Closed / Lapsed |