GB649544A - Improvements in gelatine derivatives - Google Patents
Improvements in gelatine derivativesInfo
- Publication number
- GB649544A GB649544A GB648848A GB648848A GB649544A GB 649544 A GB649544 A GB 649544A GB 648848 A GB648848 A GB 648848A GB 648848 A GB648848 A GB 648848A GB 649544 A GB649544 A GB 649544A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gelatine
- anhydride
- neutralizing
- succinic
- acetone
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A gelatine derivative is prepared by reacting gelatine with phthalic, succinic or maleic anhydride or a halogen or sulphur-substituted derivative thereof. An aqueous dispersion of gelatine is preferably heated with a solution of the anhydride at a pH of 7-12, particularly at 30-50 DEG C. and a pH of 10-11. Alkali may be added during the reaction to maintain the pH. After neutralizing, the mass is set by cooling, and may be washed and dried. Degraded gelatine or glue may be used. The products are resistant to hardening by formaldehyde and chrome alum and have special viscosity characteristics. They are of use in lithographic printing, for preparing silver halide dispersing, e.g. as described in Specification 649,545, as a vehicle for silver halide or in imbibition processes in photography. In examples, gelatine dispersed in water at 40 DEG C. is brought to a pH of 10 or 9.5 with caustic soda, and phthalic anhydride, in acetone or as powder, or succinic, maleic or chlor-maleic anhydride in acetone, is added while maintaining the pH. After neutralizing with sulphuric acid, the product is gelled, shredded and optionally washed and dried.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB648848A GB649544A (en) | 1948-03-01 | 1948-03-01 | Improvements in gelatine derivatives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB648848A GB649544A (en) | 1948-03-01 | 1948-03-01 | Improvements in gelatine derivatives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB649544A true GB649544A (en) | 1951-01-31 |
Family
ID=9815422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB648848A Expired GB649544A (en) | 1948-03-01 | 1948-03-01 | Improvements in gelatine derivatives |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB649544A (en) |
-
1948
- 1948-03-01 GB GB648848A patent/GB649544A/en not_active Expired
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