GB1325565A - Process for obtaining films and blocks of cellulose acetate - Google Patents
Process for obtaining films and blocks of cellulose acetateInfo
- Publication number
- GB1325565A GB1325565A GB4312970A GB4312970A GB1325565A GB 1325565 A GB1325565 A GB 1325565A GB 4312970 A GB4312970 A GB 4312970A GB 4312970 A GB4312970 A GB 4312970A GB 1325565 A GB1325565 A GB 1325565A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- solvent
- biacetate
- water
- swelling agent
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/08—Cellulose derivatives
- C08L1/10—Esters of organic acids, i.e. acylates
- C08L1/12—Cellulose acetate
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/447—Systems using electrophoresis
- G01N27/44704—Details; Accessories
- G01N27/44747—Composition of gel or of carrier mixture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2001/00—Use of cellulose, modified cellulose or cellulose derivatives, e.g. viscose, as moulding material
- B29K2001/08—Cellulose derivatives
- B29K2001/12—Cellulose acetate
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Dispersion Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Electrochemistry (AREA)
- Pathology (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Moulding By Coating Moulds (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
1325565 Cellulose acetate films G B DEL CAMPO 9 Sept 1970 [28 April 1970] 43129/70 Heading B5B A process for preparing films or blocks of cellulose in acetate particularly suitable for use in electrophoresis comprises the steps of dissolving cellulose biacetate in a first mixture comprising a major proportion of a watermiscible solvent (e.g. acetone) and a minor proportion of a water-miscible swelling agent (e.g. ethylene glycol monoethylether) for cellulose biacetate, adding to the solution, with stirring, a second mixture containing a major proportion of the swelling agent and a minor proportion of the solvent thereby obtaining a swollen mass of cellulose biacetate, adding to the swollen mass 3 to 10% by weight formamide, casting a film from the resultant mass, evaporating at least a portion of the solvent and immersing the cast film into water to replace the remainder of solvent and swelling agent by the water and obtain a film of cellulose biacetate aqueous gel. All the steps of the process are carried out at room temperature. In an example the ratios of acetone to ethylene glycol monoethyl ether are 3 : 2 for the first mixture and 1 : 5 for the second.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2402970 | 1970-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1325565A true GB1325565A (en) | 1973-08-01 |
Family
ID=11211567
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1480470A Expired GB1331580A (en) | 1970-03-26 | 1970-03-26 | Electrophoresis film and block manufacture |
| GB4312970A Expired GB1325565A (en) | 1970-04-28 | 1970-09-09 | Process for obtaining films and blocks of cellulose acetate |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1480470A Expired GB1331580A (en) | 1970-03-26 | 1970-03-26 | Electrophoresis film and block manufacture |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2045222C3 (en) |
| ES (1) | ES383851A1 (en) |
| FR (1) | FR2061077A5 (en) |
| GB (2) | GB1331580A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8428876D0 (en) * | 1984-11-15 | 1984-12-27 | Ciba Geigy Ag | Diagnostic strips |
-
1970
- 1970-03-26 GB GB1480470A patent/GB1331580A/en not_active Expired
- 1970-09-08 FR FR7032520A patent/FR2061077A5/fr not_active Expired
- 1970-09-09 GB GB4312970A patent/GB1325565A/en not_active Expired
- 1970-09-12 DE DE19702045222 patent/DE2045222C3/en not_active Expired
- 1970-09-14 ES ES383851A patent/ES383851A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES383851A1 (en) | 1973-10-01 |
| DE2045222B2 (en) | 1980-08-07 |
| GB1331580A (en) | 1973-09-26 |
| DE2045222A1 (en) | 1971-12-09 |
| FR2061077A5 (en) | 1971-06-18 |
| DE2045222C3 (en) | 1981-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |