GB523208A - Improvements in or relating to the coagulation of aqueous dispersions - Google Patents
Improvements in or relating to the coagulation of aqueous dispersionsInfo
- Publication number
- GB523208A GB523208A GB37661/38A GB3766138A GB523208A GB 523208 A GB523208 A GB 523208A GB 37661/38 A GB37661/38 A GB 37661/38A GB 3766138 A GB3766138 A GB 3766138A GB 523208 A GB523208 A GB 523208A
- Authority
- GB
- United Kingdom
- Prior art keywords
- butadiene
- chloro
- alcohol
- coagulation
- alcohols
- 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
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C1/00—Treatment of rubber latex
- C08C1/14—Coagulation
- C08C1/15—Coagulation characterised by the coagulants used
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
523,208. Synthetic rubber. DU PONT DE NEMOURS & CO., E. I. Dec. 28, 1938, No. 37661. Convention date, Dec. 24, 1937. [Class 2 (iii)] Synthetic rubber dispersions produced by the emulsion polymerization of butadiene, diaethyl butadiene, isoprene, 2-chloro- and 2 bromo-butadiene and 2-chloro- and 2-bromomethyl-butadiene are coagulated by means of the combined action of a water-soluble salt and a water-soluble alcohol, aldehyde, ketone or carboxylic acid. In examples (1) 2-chloro-1-3- butadiene is polymerized in emulsion with cetyl trimethylammonium bromide and sulphur dioxide, phenyl-#-naphthylamine in benzene is added and coagulation is effected with aqueous butyl or ethyl alcohol and sodium chloride ; (2) an emulsion of butadiene, methacrylic nitrile, oleamidomethyl dimethylamine hydrochloride and acetic acid is polymerized and the diluted dispersion is coagulated with aqueous butyl alcohol and sodium chloride. Other emulsifying agents may be used such as N-cetyl and C-cetyl betaine, sulphonic acids made by hydrolysis of the reaction products of sulphuric dioxide and a halogen on a long-chain non- aromatic hydrocarbon, and aromatic compounds obtained by condensing sulphonic acids with formaldehyde. For the coagulation the sodium chloride may be replaced by sodium fluoride, sulphate, carbonate, or acetate, potassium iodide, ammonium chloride or calcium chloride or salts containing both organic and inorganic radicles ; other alcohols that may be used include #-ethoxyethyl alcohol, 4-hydroxy-2 chloro-2-butene, diacetone alcohol and isobutyl hexyl and benzyl alcohols ; the alcohols should have a solubility of at least 1 per cent. at the temperature employed.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US523208XA | 1937-12-24 | 1937-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB523208A true GB523208A (en) | 1940-07-09 |
Family
ID=21976833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB37661/38A Expired GB523208A (en) | 1937-12-24 | 1938-12-28 | Improvements in or relating to the coagulation of aqueous dispersions |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB523208A (en) |
-
1938
- 1938-12-28 GB GB37661/38A patent/GB523208A/en not_active Expired
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