GB1451775A - Preparation of polyurethanes branched aromatic polycarbonates - Google Patents
Preparation of polyurethanes branched aromatic polycarbonatesInfo
- Publication number
- GB1451775A GB1451775A GB5187673A GB5187673A GB1451775A GB 1451775 A GB1451775 A GB 1451775A GB 5187673 A GB5187673 A GB 5187673A GB 5187673 A GB5187673 A GB 5187673A GB 1451775 A GB1451775 A GB 1451775A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polyurethanes
- koh
- polyol
- polyester
- molecular weight
- 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
- 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
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
- C08G18/4241—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols from dicarboxylic acids and dialcohols in combination with polycarboxylic acids and/or polyhydroxy compounds which are at least trifunctional
-
- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
1451775 Polyurethanes IMPERIAL CHEMICAL INDUSTRIES Ltd 24 Sept 1974 [8 Nov 1973] 51876/73 Addition to 1429296 Heading C3R A process for preparing polyurethanes comprises reacting diphenylmethane diisocyanate at a NCO : OH ratio of from 0À88 : 1 to 1À20 : 1 under substantially anhydrous conditions with, as sole isocyanate-reactive component, a polyester having a viscosity within the range 100 to 250 centistokes at 100‹ C., a hydroxyl value within the range 50 to 100 mg KOH/g. and an acid value less than 2À0 mg. KOH/g., which has been formed by condensing adipic acid with a molecular excess of a mixture of polyols consisting of ethylene and propylene glycols in a molar ratio of from 65 : 35 to 75 : 25 together with a polyol having 3 or more hydroxyl groups and a molecular weight below 500, the amount of the latter being such as to give up to 0À2 branch points per 1000 units of molecular weight of the polyester. The examples describe reacting polyesters, in which the polyol is trimethylolpropane, with 4,4<SP>1</SP>-diphenylmethane diisocyanate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5187673A GB1451775A (en) | 1973-11-08 | 1973-11-08 | Preparation of polyurethanes branched aromatic polycarbonates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5187673A GB1451775A (en) | 1973-11-08 | 1973-11-08 | Preparation of polyurethanes branched aromatic polycarbonates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1451775A true GB1451775A (en) | 1976-10-06 |
Family
ID=10461740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5187673A Expired GB1451775A (en) | 1973-11-08 | 1973-11-08 | Preparation of polyurethanes branched aromatic polycarbonates |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1451775A (en) |
-
1973
- 1973-11-08 GB GB5187673A patent/GB1451775A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |