GB734952A - Suspension stabilisers - Google Patents
Suspension stabilisersInfo
- Publication number
- GB734952A GB734952A GB2928852A GB2928852A GB734952A GB 734952 A GB734952 A GB 734952A GB 2928852 A GB2928852 A GB 2928852A GB 2928852 A GB2928852 A GB 2928852A GB 734952 A GB734952 A GB 734952A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- sulphonates
- styrene
- methyl
- monomer
- 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
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
In the pearl polymerization of styrene compounds, e.g styrene, chlorostyrenes, methyl and dimethyl styrenes and divinyl benzenes, alone or with copolymerizable monomers such as butadiene, a -methyl styrene, methyl methacrylate and acrylonitrile, finely divided calcium or strontium fluoride is used as suspension stabilizer. The aqueous suspension is agitated and heated, preferably at 60-160 DEG C. with a catalyst, e.g. benzoyl peroxide, at a pH of 5 to 9 and with a monomer-water ratio within the range 1 : 1 to 1 : 10. The calcium or strontium fluoride is present in an amount less than 5 per cent weight/volume of the monomer, preferably 0.02 to 2 per cent. A surface-active agent, e.g. organic sulphates or sulphonates of alcohols or hydrocarbons, alkali sulphite addition products of neutral esters of unsaturated polycarboxylic acids, alkyl aromatic sulphonates and alkyl aryl polyether sulphonates may be present in not more than 10 per cent by weight of the stabilizer and in insufficient quantity to cause emulsification. The fluorides are preferably prepared by adding sodium fluoride to a solution of the chloride.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2928852A GB734952A (en) | 1952-11-20 | 1952-11-20 | Suspension stabilisers |
| FR1092626D FR1092626A (en) | 1952-11-20 | 1953-11-14 | Process for the bead polymerization of vinyl compounds and suspending stabilizers for use in this process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2928852A GB734952A (en) | 1952-11-20 | 1952-11-20 | Suspension stabilisers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB734952A true GB734952A (en) | 1955-08-10 |
Family
ID=10289156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2928852A Expired GB734952A (en) | 1952-11-20 | 1952-11-20 | Suspension stabilisers |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1092626A (en) |
| GB (1) | GB734952A (en) |
-
1952
- 1952-11-20 GB GB2928852A patent/GB734952A/en not_active Expired
-
1953
- 1953-11-14 FR FR1092626D patent/FR1092626A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1092626A (en) | 1955-04-25 |
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