Global patent index - EP 0971262 A1

EP 0971262 A1 2000-01-12 - Oil-water emulsions for photographic applications comprising gelatin having high stability

Title (en)

Oil-water emulsions for photographic applications comprising gelatin having high stability

Title (de)

Für photographische Anwendungen geeignete, Gelatine enthaltende Öl-Wasser-Emulsionen von hoher Stabilität

Title (fr)

Emulsions huile-eau appropriées pour des applications photographiques comprenant de la gélatine et ayant une haute stabilité

Publication

EP 0971262 A1 (EN)

Application

EP 99202265 A

Priority

NL 1009603 A

Abstract (en)

An oil-water emulsion for photographic application said emulsion comprising oil, water, gelatin and a surfactant, said gelatin consisting of a) a fraction of gelatin molecules with a molecular weight smaller than 70 kDa, said fraction forming 30-90% by weight on the basis of the total weight of gelatin in the emulsion, b) a fraction of gelatin molecules with a molecular weight higher than 130 kDa, said fraction forming 5-38% by weight on the basis of the total weight of gelatin in the emulsion, c) the fractions of gelatin molecules with a molecular weight higher than 130 kDa and with a molecular weight smaller than 70 kDa are further related by having as lower limit % fraction > 130 kDa = 0.455 x (100-Ä% fraction < 70 kDaÜ) and as upper limit % fraction > 130 kDa = 0.606 x (100-Ä% fraction < 70 kDaÜ) d) whereby in total Ä% fraction < 70 kDaÜ + Ä% fraction > 130 kDaÜ 100%.

IPC 1-7 (main, further and additional classification)

G03C 1/047; C09H 5/00; G03C 1/005; G03C 7/388

IPC 8 full level (invention and additional information)

G03C 1/047 (2006.01); G03C 7/388 (2006.01)

CPC (invention and additional information)

G03C 1/047 (2013.01); G03C 7/388 (2013.01)

Combination set (CPC)

  1. G03C 7/388 + G03C 1/005
  2. G03C 1/047 + G03C 2001/0473

Citation (search report)

  • [A] EP 0593180 A1
  • [A] EP 0761297 A1
  • [A] B.H.TAVERNIER: "Molecular Mass Distribution of Gelatin and Physical Properties" 1989 , H.AMMANN-BRASS, J.POURADIER (ED.S); PROCEEDINGS OF THE 5TH IAG CONFERENCE , FRIBOURG 1989 XP002107717 171950 * page 217 - page 228 * * table 1 *

Designated contracting state (EPC)

DE FR GB NL

EPO simple patent family

EP 0971262 A1 20000112; NL 1009603 C2 20000111

INPADOC legal status

2006-08-09 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20060209

2000-10-04 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000110

2000-09-27 [AKX] PAYMENT OF DESIGNATION FEES

- Free Format Text: DE FR GB NL

2000-01-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB NL

2000-01-12 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free Format Text: AL;LT;LV;MK;RO;SI