GB659771A - The pearl polymerisation of unsaturated organic compounds - Google Patents
The pearl polymerisation of unsaturated organic compoundsInfo
- Publication number
- GB659771A GB659771A GB717/49A GB71749A GB659771A GB 659771 A GB659771 A GB 659771A GB 717/49 A GB717/49 A GB 717/49A GB 71749 A GB71749 A GB 71749A GB 659771 A GB659771 A GB 659771A
- Authority
- GB
- United Kingdom
- Prior art keywords
- organic compounds
- phosphate
- calcium phosphate
- unsaturated organic
- polymerization
- 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
-
- 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
- C08F12/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F12/02—Monomers containing only one unsaturated aliphatic radical
- C08F12/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F12/06—Hydrocarbons
- C08F12/08—Styrene
-
- 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
- C08F2/18—Suspension polymerisation
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polymerisation Methods In General (AREA)
- Polymerization Catalysts (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
In a process for the pearl polymerization of one or more organic compounds containing the CH2=C< group, e.g. styrene, methyl methacrylate, vinyl acetate, acrylonitrile or mixtures thereof, in aqueous suspension, finely-divided particles of calcium phosphate having a CaO/P2O5 ratio of at least 1.35 are present as a suspension stabilizer. A catalyst soluble in the monomer, e.g. benzoyl peroxide, is normally present and the phosphate may be added during the polymerization. The pearls are finally washed with dilute acid, water and dried. Specification 638,572 is referred to.ALSO:Calcium phosphate, prepared by precipitation with (1) phosphoric acid from a hot, dilute, aqueous suspension of lime, or (2) tri-sodium phosphate from a hot, aqueous solution of calcium chloride maintained at a pH of 8-9 by addition of ammonia, or (3) by heating lime and water at 250 DEG C. with calcium phosphate, in an autoclave, is used as a stabilizer for the pearl polymerization of unsaturated organic compounds.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB283434X | 1949-01-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB659771A true GB659771A (en) | 1951-10-24 |
Family
ID=10274177
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB717/49A Expired GB659771A (en) | 1949-01-11 | 1949-01-11 | The pearl polymerisation of unsaturated organic compounds |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE493149A (en) |
CH (1) | CH283434A (en) |
DE (1) | DE946922C (en) |
FR (1) | FR1007545A (en) |
GB (1) | GB659771A (en) |
NL (1) | NL72810C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2715118A (en) * | 1951-09-19 | 1955-08-09 | Koppers Co Inc | Suspension polymerization using synthetic calcium phosphate |
DE1091755B (en) * | 1958-04-30 | 1960-10-27 | Styrene Products Ltd | Process for the polymerization of vinyl aromatic compounds |
US3032540A (en) * | 1958-05-20 | 1962-05-01 | Union Carbide Corp | Method for improving the color-stability of acrylonitrile-styrene copolymer |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2638839A1 (en) * | 1976-08-28 | 1978-03-02 | Basf Ag | PROCESS FOR THE PRODUCTION OF STYRENE SUSPENSION POLYMERISATES |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE735284C (en) * | 1935-01-01 | 1943-05-11 | Roehm & Haas G M B H | Process for polymerizing acrylic, methacrylic and vinyl compounds |
US2122886A (en) * | 1936-12-11 | 1938-07-05 | Du Pont | Process of polymerization |
-
0
- BE BE493149D patent/BE493149A/xx unknown
- NL NL72810D patent/NL72810C/xx active
-
1949
- 1949-01-11 GB GB717/49A patent/GB659771A/en not_active Expired
-
1950
- 1950-01-03 FR FR1007545D patent/FR1007545A/en not_active Expired
- 1950-01-04 CH CH283434D patent/CH283434A/en unknown
- 1950-01-10 DE DEH1193A patent/DE946922C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2715118A (en) * | 1951-09-19 | 1955-08-09 | Koppers Co Inc | Suspension polymerization using synthetic calcium phosphate |
DE1091755B (en) * | 1958-04-30 | 1960-10-27 | Styrene Products Ltd | Process for the polymerization of vinyl aromatic compounds |
US3032540A (en) * | 1958-05-20 | 1962-05-01 | Union Carbide Corp | Method for improving the color-stability of acrylonitrile-styrene copolymer |
Also Published As
Publication number | Publication date |
---|---|
DE946922C (en) | 1956-08-09 |
CH283434A (en) | 1952-06-15 |
FR1007545A (en) | 1952-05-07 |
NL72810C (en) | |
BE493149A (en) |
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