GB1192466A - Improvements in Heat Sensitive Copying Materials - Google Patents

Improvements in Heat Sensitive Copying Materials

Info

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
Application number
GB4010467A
Inventor
Herbert Sedgwick Wilgus
John Warburton Gates
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to GB4010467A priority Critical patent/GB1192466A/en
Publication of GB1192466A publication Critical patent/GB1192466A/en
Expired legal-status Critical Current

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.
GB4010467A 1967-09-01 1967-09-01 Improvements in Heat Sensitive Copying Materials Expired GB1192466A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50148325A (en) * 1974-05-02 1975-11-27

Cited By (2)

* Cited by examiner, † Cited by third party
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