GB677951A - Process for making high polymers of alpha-methyl styrene - Google Patents
Process for making high polymers of alpha-methyl styreneInfo
- Publication number
- GB677951A GB677951A GB22778/50A GB2277850A GB677951A GB 677951 A GB677951 A GB 677951A GB 22778/50 A GB22778/50 A GB 22778/50A GB 2277850 A GB2277850 A GB 2277850A GB 677951 A GB677951 A GB 677951A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alpha
- methyl styrene
- polymer
- per cent
- mixture
- 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
- C08F112/00—Homopolymers 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
- C08F112/02—Monomers containing only one unsaturated aliphatic radical
- C08F112/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F112/06—Hydrocarbons
- C08F112/12—Monomers containing a branched unsaturated aliphatic radical or a ring substituted by an alkyl radical
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)
Abstract
A high molecular weight polymer of alpha-methyl styrene is prepared by maintaining a mixture consisting of alpha-methyl styrene and finely-divided metallic sodium at a temperature between 0 DEG and 30 DEG C., preferably 10 DEG and 25 DEG C., until from 20 to 35 per cent of the alpha-methyl styrene is polymerized, the mixture thereafter filtered to separate the particles of metallic sodium from the solution of polymer in monomeric alpha-methyl styrene, and the polymer recovered from the filtered solution. The amount of metallic sodium in the mixture is preferably between 0.5 and 10 per cent by weight of the alpha-methyl styrene. The polymer preferably has a molecular weight corresponding to an intrinsic viscosity in toluene of at least 0.4 and contains approximately 0.06 per cent of its weight of chemically combined sodium; it may be recovered from the filtered solution by distilling at 170-190 DEG C. at a pressure of 10 mm. or less for approximately 10 hours. The process may be carried out in continuous manner by feeding monomeric alpha-methyl styrene to the reaction mixture of finely-divided sodium, alpha-methyl styrene and polymeric alpha-methyl styrene, and withdrawing reaction liquor consisting of a solution of from 20 to 35 per cent by weight of the polymer in monomeric alpha-methyl styrene through a filter, the filtered solution being distilled to separate the monomer from the polymer, and the monomer recycled to the reaction. Specification 677,594 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US677951XA | 1949-10-31 | 1949-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB677951A true GB677951A (en) | 1952-08-27 |
Family
ID=22078458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22778/50A Expired GB677951A (en) | 1949-10-31 | 1950-09-15 | Process for making high polymers of alpha-methyl styrene |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE513558A (en) |
| FR (1) | FR1066218A (en) |
| GB (1) | GB677951A (en) |
| NL (1) | NL83820C (en) |
-
0
- BE BE513558D patent/BE513558A/xx unknown
- NL NL83820D patent/NL83820C/xx active
-
1950
- 1950-09-15 GB GB22778/50A patent/GB677951A/en not_active Expired
-
1952
- 1952-08-01 FR FR1066218D patent/FR1066218A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL83820C (en) | |
| BE513558A (en) | |
| FR1066218A (en) | 1954-06-03 |
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