GB1192466A - Improvements in Heat Sensitive Copying Materials - Google Patents
Improvements in Heat Sensitive Copying MaterialsInfo
- Publication number
- GB1192466A GB1192466A GB4010467A GB4010467A GB1192466A GB 1192466 A GB1192466 A GB 1192466A GB 4010467 A GB4010467 A GB 4010467A GB 4010467 A GB4010467 A GB 4010467A GB 1192466 A GB1192466 A GB 1192466A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydrogen
- hydroquinone
- prepared
- acid
- carboxypentyl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1,192,466. Substituted quinones and hydroquinones. EASTMAN KODAK CO. 1 Sept., 1967, No. 40104/67. Heading C2C. [Also in Division G2] 2 - (Omega - carboxypentyl) - 5 - methyl hydroquinone is prepared by refluxing methylhydroquinone with monethyl adipate in the presence of borontrifluoride and poured into water. 5 - (2,5 - Dihydroxy - 4 - methylbenzoyl) pentanoic acid is extracted from the aqueous layer and the ethyl ester extracted from the organic layer with ether. The ethyl ester is refluxed with acetic acid to produce 5-(2,5-dihydroxy-4-methylbenzoyl)-pentanoic acid. The acid is now reduced with palladium to produce the desired hydroquinone. 2 - (Omega - carboxypentyl) - 5 - methyl quinone is prepared by oxidation of the hydroquinone with sodium chlorate. Hydroquinones of formula and p-quinones of formula where R and R 2 are alkylene or arylene, R 1 is hydrogen or R 1 and R 2 together complete a benzene ring and X is hydrogen, carboxyl or acyloxy provided that no more than one X is hydrogen may be similarly prepared.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4010467A GB1192466A (en) | 1967-09-01 | 1967-09-01 | Improvements in Heat Sensitive Copying Materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4010467A GB1192466A (en) | 1967-09-01 | 1967-09-01 | Improvements in Heat Sensitive Copying Materials |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1192466A true GB1192466A (en) | 1970-05-20 |
Family
ID=10413219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4010467A Expired GB1192466A (en) | 1967-09-01 | 1967-09-01 | Improvements in Heat Sensitive Copying Materials |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1192466A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50148325A (en) * | 1974-05-02 | 1975-11-27 |
-
1967
- 1967-09-01 GB GB4010467A patent/GB1192466A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50148325A (en) * | 1974-05-02 | 1975-11-27 | ||
JPS5919930B2 (en) * | 1974-05-02 | 1984-05-09 | 武田薬品工業株式会社 | Method for producing quinonic acid derivatives |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |