GB1312633A - Polymerization of conjugated dienes - Google Patents
Polymerization of conjugated dienesInfo
- Publication number
- GB1312633A GB1312633A GB4049470A GB4049470A GB1312633A GB 1312633 A GB1312633 A GB 1312633A GB 4049470 A GB4049470 A GB 4049470A GB 4049470 A GB4049470 A GB 4049470A GB 1312633 A GB1312633 A GB 1312633A
- Authority
- GB
- United Kingdom
- Prior art keywords
- critical
- temperature
- polymer concentration
- solids content
- minimum
- 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
- C08F36/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F36/02—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F36/04—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
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
1312633 Bulk polymerization of dienes FIRESTONE TIRE & RUBBER CO 21 Aug 1970 [22 Sept 1969] 40494/70 Heading C3P Conjugated dienes are polymerized or copolymerized in bulk, using an organolithium initiator, by a procedure in which the heat of reaction is removed by evaporation and condensation of a controlled amount of the monomer and excessive foaming is avoided by keeping the temperature below the "critical minimum foaming temperature" until the solids content of the mixture exceeds the "critical polymer concentration" and then raising it to 50-150‹ C. to complete the process. The temperature at which excessive foaming occurs is found to vary with the solids content of the mixture, as illustrated, and to pass through a minimum, referred to as the "critical minimum foaming temperature" (usually about 40‹ C. for butadiene polymerization), the corresponding solids content being referred to as the "critical polymer concentration" and lying in the range 20-40%. These quantities are constants for a given set of reaction parameters. After the "critical polymer concentration" has been exceeded monomer may be introduced and polymer withdrawn continuously at the higher temperature while maintaining the polymer concentration above the critical value.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US86000569A | 1969-09-22 | 1969-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1312633A true GB1312633A (en) | 1973-04-04 |
Family
ID=25332292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4049470A Expired GB1312633A (en) | 1969-09-22 | 1970-08-21 | Polymerization of conjugated dienes |
Country Status (8)
| Country | Link |
|---|---|
| BE (1) | BE756165A (en) |
| CA (1) | CA924442A (en) |
| DE (1) | DE2045755A1 (en) |
| ES (1) | ES383856A1 (en) |
| FR (1) | FR2061421A5 (en) |
| GB (1) | GB1312633A (en) |
| NL (1) | NL7013796A (en) |
| ZA (1) | ZA706305B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA721145B (en) * | 1971-04-07 | 1972-10-25 | Firestone Tire & Rubber Co | Controlled high temperature polymerization of butadiene |
-
0
- BE BE756165D patent/BE756165A/en unknown
-
1970
- 1970-08-21 GB GB4049470A patent/GB1312633A/en not_active Expired
- 1970-09-15 CA CA093216A patent/CA924442A/en not_active Expired
- 1970-09-15 FR FR7033347A patent/FR2061421A5/fr not_active Expired
- 1970-09-15 ZA ZA706305A patent/ZA706305B/en unknown
- 1970-09-16 DE DE19702045755 patent/DE2045755A1/en active Pending
- 1970-09-17 NL NL7013796A patent/NL7013796A/xx unknown
- 1970-09-22 ES ES383856A patent/ES383856A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE756165A (en) | 1971-03-15 |
| DE2045755A1 (en) | 1971-03-25 |
| NL7013796A (en) | 1971-03-24 |
| FR2061421A5 (en) | 1971-06-18 |
| ES383856A1 (en) | 1973-08-16 |
| ZA706305B (en) | 1971-04-28 |
| CA924442A (en) | 1973-04-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |