GB785938A - Improvements in the production of polyvinyl compounds - Google Patents
Improvements in the production of polyvinyl compoundsInfo
- Publication number
- GB785938A GB785938A GB459155A GB459155A GB785938A GB 785938 A GB785938 A GB 785938A GB 459155 A GB459155 A GB 459155A GB 459155 A GB459155 A GB 459155A GB 785938 A GB785938 A GB 785938A
- Authority
- GB
- United Kingdom
- Prior art keywords
- monomer
- per cent
- chain member
- catalysts
- 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
- C08F2/20—Aqueous medium with the aid of macromolecular dispersing agents
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)
- Polymerisation Methods In General (AREA)
Abstract
In the aqueous suspension polymerization of monomeric vinyl compounds, e.g. styrene and methyl methacrylate, using 0.05 to 1.5 per cent (based on monomer) of insoluble pulverulent inorganic compounds such as barium sulphate and tricalcium phosphate, and monomersoluble catalysts, 0.0001 to 0.1 per cent (based on monomer) of a silicone oil is present. The silicone oils are organopolysiloxanes and organohydroxysiloxanes of the formula MDxM, where M is a monofunctional chain member, e.g. (CH3)3Siconnected through an oxygen atom, D a difunctional chain member, e.g. -Si(CH3)2- connected through two oxygen atoms, and x is 50 to 500. Suitable catalysts are benzoyl, lauroyl and di-t-butyl peroxides, cumene hydroperoxides and azo-di-isobutyronitrile or mixtures. Polymerization may be carried out at 50-130 DEG C at a pH between 5 and 9. The granular product has a relatively uniform grain size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB459155A GB785938A (en) | 1955-02-16 | 1955-02-16 | Improvements in the production of polyvinyl compounds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB459155A GB785938A (en) | 1955-02-16 | 1955-02-16 | Improvements in the production of polyvinyl compounds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB785938A true GB785938A (en) | 1957-11-06 |
Family
ID=9780052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB459155A Expired GB785938A (en) | 1955-02-16 | 1955-02-16 | Improvements in the production of polyvinyl compounds |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB785938A (en) |
-
1955
- 1955-02-16 GB GB459155A patent/GB785938A/en not_active Expired
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