GB858000A - Method of increasing the size of the dispersed particles in a synthetic rubber latex - Google Patents
Method of increasing the size of the dispersed particles in a synthetic rubber latexInfo
- Publication number
- GB858000A GB858000A GB3298559A GB3298559A GB858000A GB 858000 A GB858000 A GB 858000A GB 3298559 A GB3298559 A GB 3298559A GB 3298559 A GB3298559 A GB 3298559A GB 858000 A GB858000 A GB 858000A
- Authority
- GB
- United Kingdom
- Prior art keywords
- latex
- alkyl
- increasing
- size
- synthetic rubber
- 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
- C08C1/02—Chemical or physical treatment of rubber latex before or during concentration
- C08C1/065—Increasing the size of dispersed rubber particles
- C08C1/07—Increasing the size of dispersed rubber particles characterised by the agglomerating agents used
-
- 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
- C08C1/02—Chemical or physical treatment of rubber latex before or during concentration
- C08C1/065—Increasing the size of dispersed rubber particles
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Graft Or Block Polymers (AREA)
Abstract
The size of the dispersed polymer particles in a butadiene-polymer synthetic rubber latex containing 2-10 parts of a water soluble soap of soap-forming monocarboxylic acid per 100 parts latex solids and having a pH from 8 to 11 is increased by reducing the pH of the latex to 5,5 to 7,5 in the presence of 0,01-1% of polyvinyl methyl ether based on the latex solids and then increasing the pH to 8 to 11. Butadiene styrene copolymer is the preferred rubber. Specified soaps are the alkali-metal, ammonium and amine salts of higher fatty acids of 10 to 24 carbon atoms or of rosin acids including dehydrogenated, hydrogenated and disproportionated rosin acids. Other surface-active dispersing agents e.g. alkyl sulphonates, alkyl and alkyl aryl sulphonates may also be present. The pH may be reduced using carbondioxide, formic or acetic acid, sodium silicofluoride, or an ammonium salt of a strong acid together with formaldehyde. The pH may be increased, e.g. by adding ammonia, or sodium or potassium hydroxide. The latex may have an initial solids content of 20-50% and finally be concentrated, e.g. by evaporation of water, to 55 to 70%.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US77666858A | 1958-11-28 | 1958-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB858000A true GB858000A (en) | 1961-01-04 |
Family
ID=25108069
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3298559A Expired GB858000A (en) | 1958-11-28 | 1959-09-29 | Method of increasing the size of the dispersed particles in a synthetic rubber latex |
| GB3298059A Expired GB859699A (en) | 1958-11-28 | 1959-09-29 | Method of increasing the size of the dispersed particles in a synthetic rubber latex |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3298059A Expired GB859699A (en) | 1958-11-28 | 1959-09-29 | Method of increasing the size of the dispersed particles in a synthetic rubber latex |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE583651A (en) |
| DE (1) | DE1420179A1 (en) |
| FR (2) | FR1238597A (en) |
| GB (2) | GB858000A (en) |
| IT (2) | IT615691A (en) |
| LU (1) | LU37796A1 (en) |
| NL (1) | NL244497A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4804694A (en) * | 1987-11-16 | 1989-02-14 | Westvaco Corporation | Process for preparation of high solids concentrated latex |
-
0
- LU LU37796D patent/LU37796A1/xx unknown
- NL NL244497D patent/NL244497A/xx unknown
- IT IT617528D patent/IT617528A/it unknown
- IT IT615691D patent/IT615691A/it unknown
-
1959
- 1959-09-07 DE DE19591420179 patent/DE1420179A1/en active Pending
- 1959-09-29 GB GB3298559A patent/GB858000A/en not_active Expired
- 1959-09-29 GB GB3298059A patent/GB859699A/en not_active Expired
- 1959-10-06 FR FR806873A patent/FR1238597A/en not_active Expired
- 1959-10-07 FR FR806934A patent/FR1237087A/en not_active Expired
- 1959-10-15 BE BE583651A patent/BE583651A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| LU37796A1 (en) | |
| IT617528A (en) | |
| GB859699A (en) | 1961-01-25 |
| NL244497A (en) | |
| FR1237087A (en) | 1960-07-22 |
| DE1420179A1 (en) | 1968-10-31 |
| FR1238597A (en) | 1960-08-12 |
| BE583651A (en) | 1960-02-01 |
| IT615691A (en) |
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