GB843881A - An improved process for the preparation of macromolecular polycarbonates - Google Patents
An improved process for the preparation of macromolecular polycarbonatesInfo
- Publication number
- GB843881A GB843881A GB11599/58A GB1159958A GB843881A GB 843881 A GB843881 A GB 843881A GB 11599/58 A GB11599/58 A GB 11599/58A GB 1159958 A GB1159958 A GB 1159958A GB 843881 A GB843881 A GB 843881A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aldehyde
- polycarbonate
- paraformaldehyde
- hydroxyphenyl
- propane
- 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
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
-
- 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
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/20—General preparatory processes
- C08G64/22—General preparatory processes using carbonyl halides
-
- 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
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/20—General preparatory processes
- C08G64/26—General preparatory processes using halocarbonates
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 the manufacture of macromalecular polycarbonates by polycondensing an organic dihydroxy compound with phosgene and/or a chlorocarbonate of an organic dihydroxy compound (the free dihydroxy compound and/or the chlorocarbonate containing an aromatic group or groups), cross-links are introduced into the polymer and the polycondensation reaction is accelerated by (a) treating the compound(s) containing the aromatic group(s) with an aldehyde prior to the polycondensation, or (b) adding an aldehyde to the mixture undergoing polycondensation, or (c) treating the polycarbonate resulting from the polycondensation with analdehyde, with or without prior isolation of the polycarbonate. The aldehyde may be formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, oenanthic aldehyde, palmitic aldehyde, hexadydrobenzaldehyde or benzaldehyde or it may be a substance yielding an aldehyde e.g. hexamethylene tetramine, paraformaldehyde or paracetaldehyde. The aldehyde may be used in combination with a quarternary ammonium compound. A large number of dihydroxy compounds are specified including aromatic dihydroxy compound, (especiallyl di-(monohydroxyaryl) -alkanes) alkylene glycols oxy-and thio-alkylene glycols and cycloaliphatic glycols. In examples (1) Phosgenewas passed into an aqueous solution containing 2 : 2- di (4- hydroxyphenyl) -propane, paraformaldehyde, sodium hydroxide and methylene chloride, then tetra -nbutyl ammonium chloride was added and the resulting dough purified to yield a polycarbonate; (2) A mixture of 2:2- di-(4- hydroxyphenyl)- propane, paraformaldehyde, sodium hydroxide and sodium dithionite was heated, the reaction mixture cooled, methylene chloride added and first phosgene and then tetra- (nbutyl)- ammonium iodide introduced and the polycarbonate precipitated from the methylene chloride with ethanol; (3) A powdered polycarbonate from 2 : 2- di- (4- hydroxyphenyl) propane was heated with paraformaldehyde and aqueous sodium hydroxide and the treated polycarbonate then heated to 254 DEG C.; (4) An aqueous solution of 2 : 2- di - (4- hydroxyphenyl)-propane, paraformaldehyde, sodium hydroxide and triethylbenzylammonium chloride was reacted with a methylene chloride solution of the bischlorocarbonate of 2: 2- di- (4-hydroxyphenyl)- propane. The polycarbonates are useful for the manufacture of threads, fibre, films, foils, and extrusion or injection moulded articles (e.g. rods and tubes). Specification 772,627 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL843881X | 1957-05-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB843881A true GB843881A (en) | 1960-08-10 |
Family
ID=19845096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11599/58A Expired GB843881A (en) | 1957-05-16 | 1958-04-11 | An improved process for the preparation of macromolecular polycarbonates |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE566669A (en) |
DE (1) | DE1114636B (en) |
FR (1) | FR1195767A (en) |
GB (1) | GB843881A (en) |
NL (2) | NL94031C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3481901A (en) * | 1962-11-30 | 1969-12-02 | Gen Electric | Thermoplastic soluble polymer of (1) an ortho-ortho alkylidene bridged novolak and (2) a difunctional halogen material |
-
0
- NL NL217343D patent/NL217343A/xx unknown
- BE BE566669D patent/BE566669A/xx unknown
- NL NL94031D patent/NL94031C/xx active
-
1958
- 1958-04-11 DE DEN14923A patent/DE1114636B/en active Pending
- 1958-04-11 GB GB11599/58A patent/GB843881A/en not_active Expired
- 1958-05-09 FR FR1195767D patent/FR1195767A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3481901A (en) * | 1962-11-30 | 1969-12-02 | Gen Electric | Thermoplastic soluble polymer of (1) an ortho-ortho alkylidene bridged novolak and (2) a difunctional halogen material |
Also Published As
Publication number | Publication date |
---|---|
NL217343A (en) | |
FR1195767A (en) | 1959-11-19 |
DE1114636B (en) | 1961-10-05 |
NL94031C (en) | |
BE566669A (en) |
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