NL7204327A - Polyethylene terephthalate prepn - by reacting ethylene glycol/dimethyl terephthalate at 140-270c and 40-500mm hg - Google Patents
Polyethylene terephthalate prepn - by reacting ethylene glycol/dimethyl terephthalate at 140-270c and 40-500mm hgInfo
- Publication number
- NL7204327A NL7204327A NL7204327A NL7204327A NL7204327A NL 7204327 A NL7204327 A NL 7204327A NL 7204327 A NL7204327 A NL 7204327A NL 7204327 A NL7204327 A NL 7204327A NL 7204327 A NL7204327 A NL 7204327A
- Authority
- NL
- Netherlands
- Prior art keywords
- polyethylene terephthalate
- terephthalate
- ethylene glycol
- reacting ethylene
- prepn
- Prior art date
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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/03—Preparation of carboxylic acid esters by reacting an ester group with a hydroxy group
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Polyesters Or Polycarbonates (AREA)
- Coloring (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
Polyethylene terephthalate is prepd. by reacting ethylene glycol and dimethyl terephthalate at 140 - 270 degrees C pref. 150 - 230 degrees C, and a pressure of 40 - 500 mm Hg pref. 75 - 400 mm Hg until the interesterification is >=98% completed, based on the development of >=98% of the theoretical amt. of methanol, to form a polyethylene terephthalate with a relatively low concn. of diethylene glycol. As a result of the low concn. of diethylene glycol, the polyethylene terephthalate has a higher crystallinity and m.p., and fibres prepd. from the polymer have a better heat stability and can be more uniformly dyed.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13045471A | 1971-04-01 | 1971-04-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
NL7204327A true NL7204327A (en) | 1972-10-03 |
Family
ID=22444766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL7204327A NL7204327A (en) | 1971-04-01 | 1972-03-30 | Polyethylene terephthalate prepn - by reacting ethylene glycol/dimethyl terephthalate at 140-270c and 40-500mm hg |
Country Status (2)
Country | Link |
---|---|
CA (1) | CA1011496A (en) |
NL (1) | NL7204327A (en) |
-
1972
- 1972-03-23 CA CA137,971A patent/CA1011496A/en not_active Expired
- 1972-03-30 NL NL7204327A patent/NL7204327A/en unknown
Also Published As
Publication number | Publication date |
---|---|
CA1011496A (en) | 1977-05-31 |
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