IE42097L - Process for the preparation of polycarbonates - Google Patents
Process for the preparation of polycarbonatesInfo
- Publication number
- IE42097L IE42097L IE242975A IE242975A IE42097L IE 42097 L IE42097 L IE 42097L IE 242975 A IE242975 A IE 242975A IE 242975 A IE242975 A IE 242975A IE 42097 L IE42097 L IE 42097L
- Authority
- IE
- Ireland
- Prior art keywords
- diol
- equiv
- transesterification
- diols
- distilled
- 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
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/02—Aliphatic polycarbonates
- C08G64/0208—Aliphatic polycarbonates saturated
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
-
- 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
- C08G64/30—General preparatory processes using carbonates
- C08G64/305—General preparatory processes using carbonates and alcohols
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)
- Polyurethanes Or Polyureas (AREA)
Abstract
1476268 Aliphatic polycarbonate-diols; polyurethanes SOC NATIONALE DES POUDRES ET EXPLOSIFS 18 Nov 1975 [11 Dec 1974] 47468/75 Heading C3R Aliphatic polycarbonate-diols (P) are made by (1) commencing transesterification between a diol (A) and diethyl carbonate (B) at <160 C. in the presence of a basic catalyst (C), and (2) completing transesterification in a thin-film evaporator, to which the heating medium is supplied at 160 C., e.g. 190-280 C. Catalyst (C) may be formed by adding Na to the diol or the reaction mixture, e.g. 0À1-0À5 g. Na per mole (A). In step (1), the temperature may gradually be raised from 90 to 140 C., the ethanol formed being distilled off until 70-80% of the theoretical amount has distilled off. The reaction mixture may then be cooled to 60 C. Step (2) is then performed. The dwell time in the evaporator may be 80 sec. The product from step (2) is immediately treated with inorganic acid, e.g. anhydrous HCl, dissolved in a waterimmiscible solvent, e.g. CH 2 Cl 2 , washed with water, and dried. The solvent may then be evaporated under reduced pressure, and (P) then stirred at 140 C. at 2-3 mm. Hg for 30 minutes. OH content may be 0À75 equiv./kg., and acidity 1À5 x 10<SP>-3</SP> equiv./kg. A polyurethane is produced by "one shot" reaction of (P), diphenylmethane diisocyanate, and butane-1,4-diol, and a film may be formed by compression-moulding.
[GB1476268A]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7440838A FR2294199A1 (en) | 1974-12-11 | 1974-12-11 | PERFECTED PROCESS FOR PREPARING POLYCARBONATES IN TWO STAGES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE42097L true IE42097L (en) | 1976-06-11 |
| IE42097B1 IE42097B1 (en) | 1980-06-04 |
Family
ID=9146037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE242975A IE42097B1 (en) | 1974-12-11 | 1975-11-07 | Process for the preparation of polycarbonates |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS5183693A (en) |
| BE (1) | BE836535A (en) |
| CA (1) | CA1064957A (en) |
| DE (1) | DE2555805A1 (en) |
| DK (1) | DK558975A (en) |
| FR (1) | FR2294199A1 (en) |
| GB (1) | GB1476268A (en) |
| IE (1) | IE42097B1 (en) |
| IT (1) | IT1059855B (en) |
| LU (1) | LU73968A1 (en) |
| NL (1) | NL7513786A (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3717060A1 (en) * | 1987-05-21 | 1988-12-01 | Bayer Ag | POLYETHER-POLYCARBONATE-DIOLE, THEIR PRODUCTION AND USE AS STARTING PRODUCTS FOR POLYURETHANE PLASTICS |
| US4891421A (en) * | 1987-06-22 | 1990-01-02 | Dainippon Ink And Chemicals, Inc. | Processes for producing polycarbonate polyols |
| US5130384A (en) * | 1989-03-20 | 1992-07-14 | Reeves Brothers, Inc. | Calenderable thermoplastic polyurethane elastomer compositions containing millable linear polyurethanes |
| US5298303A (en) * | 1989-03-20 | 1994-03-29 | Reeves Brothers, Inc. | Fabric structure for severe use applications |
| US5001208A (en) * | 1989-03-20 | 1991-03-19 | Reeves Brothers, Inc. | Linear polyurethane elastomer compositions based on mixed polycarbonate and polyether polyols |
| US5096992A (en) * | 1989-03-20 | 1992-03-17 | Reeves Brothers, Inc. | Use of modified diisocyanates for preparing linear thermoplastic polyurethane elastomers having improved properties |
| US5110666A (en) * | 1991-05-06 | 1992-05-05 | Reeves Brothers, Inc. | Coated fabric structure for air bag applications |
| DE19513164A1 (en) * | 1995-04-07 | 1996-10-10 | Bayer Ag | Hydroxy-terminated polycarbonates based on high mol. cyclic dimer diols with and use in prodn. of polyurethanes stable against hydrolysis and oxidn. |
| DE19900554A1 (en) * | 1999-01-09 | 2000-07-13 | Bayer Ag | Process for the preparation of aliphatic oligocarbonate diols from dimethyl carbonate and aliphatic diols |
| DE10027907A1 (en) | 2000-06-06 | 2001-12-13 | Bayer Ag | Production of aliphatic oligocarbonate diols, useful in the production of plastics, fibers, coatings and adhesives, comprises reaction of aliphatic diols with dimethyl carbonate in a multi-stage process. |
| DE10130882A1 (en) | 2001-06-27 | 2003-01-16 | Bayer Ag | Process for the preparation of aliphatic oligocarbonate diols |
| US7112693B2 (en) | 2001-06-27 | 2006-09-26 | Bayer Aktiengesellschaft | Process for producing aliphatic oligocarbonate diols |
| DE10156896A1 (en) | 2001-11-20 | 2003-05-28 | Bayer Ag | Use of catalysts for the production of aliphatic oligocarbonate polyols |
| DE10303881A1 (en) | 2003-01-31 | 2004-08-12 | Bayer Ag | Process for the preparation of oligomeric aliphatic diols, polycarbonate diols based thereon and their prepolymers |
| DE102004032419A1 (en) * | 2004-07-05 | 2006-01-26 | Bayer Materialscience Ag | Preparation of clear isocyanate prepolymers based on hexanediol ether carbonate |
| TWI761404B (en) | 2016-12-19 | 2022-04-21 | 德商科思創德意志股份有限公司 | Process for producing (cyclo) aliphatic polycarbonate polyols having low reactivity |
| EP4378972A1 (en) | 2022-11-30 | 2024-06-05 | Covestro Deutschland AG | (cyclo)aliphatic polycarbonate polyol composition |
-
1974
- 1974-12-11 FR FR7440838A patent/FR2294199A1/en active Granted
-
1975
- 1975-11-07 IE IE242975A patent/IE42097B1/en unknown
- 1975-11-18 GB GB4746875A patent/GB1476268A/en not_active Expired
- 1975-11-26 NL NL7513786A patent/NL7513786A/en not_active Application Discontinuation
- 1975-12-01 CA CA240,852A patent/CA1064957A/en not_active Expired
- 1975-12-09 IT IT7001875A patent/IT1059855B/en active
- 1975-12-09 LU LU73968A patent/LU73968A1/xx unknown
- 1975-12-10 DK DK558975A patent/DK558975A/en not_active Application Discontinuation
- 1975-12-11 JP JP50146950A patent/JPS5183693A/ja active Pending
- 1975-12-11 BE BE162658A patent/BE836535A/en unknown
- 1975-12-11 DE DE19752555805 patent/DE2555805A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| GB1476268A (en) | 1977-06-10 |
| LU73968A1 (en) | 1977-07-01 |
| FR2294199A1 (en) | 1976-07-09 |
| BE836535A (en) | 1976-06-11 |
| IT1059855B (en) | 1982-06-21 |
| CA1064957A (en) | 1979-10-23 |
| IE42097B1 (en) | 1980-06-04 |
| FR2294199B1 (en) | 1977-04-08 |
| NL7513786A (en) | 1976-06-15 |
| DE2555805A1 (en) | 1976-10-28 |
| DK558975A (en) | 1976-06-12 |
| JPS5183693A (en) | 1976-07-22 |
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