GB768967A - Production of polyesters - Google Patents
Production of polyestersInfo
- Publication number
- GB768967A GB768967A GB2463/55A GB246355A GB768967A GB 768967 A GB768967 A GB 768967A GB 2463/55 A GB2463/55 A GB 2463/55A GB 246355 A GB246355 A GB 246355A GB 768967 A GB768967 A GB 768967A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glycol
- bis
- per cent
- isophthalate
- subjecting
- 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
- C08G63/82—Preparation processes characterised by the catalyst used
- C08G63/85—Germanium, tin, lead, arsenic, antimony, bismuth, titanium, zirconium, hafnium, vanadium, niobium, tantalum, or compounds thereof
-
- 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
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
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
A linear high molecular weight polyester is made by subjecting a bis-glycol isophthalate alone or mixed with a bis-glycol terephthalate to self-condensation in presence of lead dioxide. The glycol esters may be made by subjecting a bis-monohydric ester of the isophthalic acid alone or admixed with a bis-monohydric ester of terephthalic acid to alcoholysis with excess of the glycol also in presence of lead dioxide. Specified glycols are ethylene, propylene and butylene glycols. In examples, dimethyl isophthalate or a mixture of 75 per cent dimethyl terephthalate and 25 per cent dimethyl isophthalate was heated with ethylene glycol at 197 DEG C. in a current of nitrogen until 90 per cent of the calculated amount of methanol had been recovered. The pressure was then gradually reduced to 0.1 mm. of Hg and when no more glycol distilled off, polymerization was effected at 280 DEG C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US768967XA | 1954-06-24 | 1954-06-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB768967A true GB768967A (en) | 1957-02-27 |
Family
ID=22134829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2463/55A Expired GB768967A (en) | 1954-06-24 | 1955-01-27 | Production of polyesters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB768967A (en) |
-
1955
- 1955-01-27 GB GB2463/55A patent/GB768967A/en not_active Expired
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