GB819721A - Manufacture of polyethylene-tere phthalate capable of being spun - Google Patents
Manufacture of polyethylene-tere phthalate capable of being spunInfo
- Publication number
- GB819721A GB819721A GB30393/55A GB3039355A GB819721A GB 819721 A GB819721 A GB 819721A GB 30393/55 A GB30393/55 A GB 30393/55A GB 3039355 A GB3039355 A GB 3039355A GB 819721 A GB819721 A GB 819721A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spun
- prepared
- glycol
- preliminary condensate
- terephthalate
- 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
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
In a process for the manufacture of polyethylene glycol terephthalate, a preliminary condensate of low molecular weight and having an intrinsic viscosity up to 0.3, prepared from dimethyl terephthalate and ethylene glycol is completely condensed by heating it for a short time to temperatures ranging from 310 DEG to 350 DEG C., preferably from 315 DEG to 335 DEG C. under a reduced pressure of between about 1 and about 0.05 mm. mercury with agitation of the fused mass until a polyethylene glycol terephthalate is obtained which is capable of being spun. When the condensation has been terminated the fused mass is advantageously cooled to 270 DEG to 280 DEG C. before being discharged. The preliminary condensate may be prepared by reacting 1 mol. of dimethyl terephthalate with 2.2 to 2.5 mols. of glycol. The process may also be applied to a mixture of the preliminary condensate prepared from terephthalic acid and glycol with admixtures of other dicarboxylic acids and/or glycols. When the process is effected continuously a molten preliminary condensate may be heated to 270 DEG C. at reduced pressure, then passed through a closed channel at the reaction temperature and then after cooling again to 270 DEG to 280 DEG C. the mass can be cooled with water or be spun directly. Specification 578,079, [Group IV], is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE819721X | 1954-10-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB819721A true GB819721A (en) | 1959-09-09 |
Family
ID=6735749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30393/55A Expired GB819721A (en) | 1954-10-25 | 1955-10-24 | Manufacture of polyethylene-tere phthalate capable of being spun |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB819721A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0346735A2 (en) * | 1988-06-15 | 1989-12-20 | BASF Aktiengesellschaft | Process for the continuous preparation of linear thermoplastic polyesters |
-
1955
- 1955-10-24 GB GB30393/55A patent/GB819721A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0346735A2 (en) * | 1988-06-15 | 1989-12-20 | BASF Aktiengesellschaft | Process for the continuous preparation of linear thermoplastic polyesters |
| EP0346735A3 (en) * | 1988-06-15 | 1991-01-30 | BASF Aktiengesellschaft | Process for the continuous preparation of linear thermoplastic polyesters |
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