GB988917A - Improvements in or relating to the manufacture of polyurethanes - Google Patents
Improvements in or relating to the manufacture of polyurethanesInfo
- Publication number
- GB988917A GB988917A GB4799562A GB4799562A GB988917A GB 988917 A GB988917 A GB 988917A GB 4799562 A GB4799562 A GB 4799562A GB 4799562 A GB4799562 A GB 4799562A GB 988917 A GB988917 A GB 988917A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxypropylated
- fluorinated hydrocarbon
- reacted
- tolylene
- oxide
- 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
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy groups
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
A solution of a polyurethane containing isocyanate groups in a fluorinated hydrocarbon having a boiling point not exceeding 75 DEG C. is prepared by reacting a stoichiometric excess of an organic polyisocyanate with a polyether which contains at least 3 hydroxyl groups in the presence of a fluorinated hydrocarbon. In examples (1) oxypropylated trimethylol propane of M.W 310 (2) oxypropylated tolylene diamines of MW 450 and (3) oxypropylated sorbitol of MW 760 are reacted with excess tolylene diisocyanate in the presence of trichlorofluoromethane. Specifications 892,557 and 926,414 are referred to.ALSO:A solution of a polyurethane prepolymer in a fluorinated hydrocarbon having a boiling point not exceeding 75 DEG C. is prepared by reacting a stoichiometric excess of an organic polyisocyanate with a polyether which contains at least three hydroxyl groups in the presence of the fluorinated hydrocarbon. Polyethers may be prepared by the polymerization of an alkylene oxide with a compound having at least 3 active hydrogen atoms per molecule, e.g. ammonia, hydrazine, glycerol, trimethylolpropane, triethanolamine, pentacrythritol, sorbitol, sucrose, phloroglucinol, ethanolamine, ethylene diamine, tolylene diamine, diaminodiphenylmethane and phenol-formaldehyde condensates. The alkylene oxide may be ethylene oxide, 1:2-propylene oxide, 1:2-butylene oxide, 2:3-butylene oxide and epichlorohydrin. Cyclic oxides, e.g. glycidol and 3-hydroxymethyloxacyclobutane may be used. Conventional isocyanates are listed including chlorophenylene 2:4-diisocyanate. The polyurethane prepolymer compositions may be reacted with polyethers containing at least 3 hydroxyl groups and optionally water or more fluorinated hydrocarbon to form polyurethane foams. In Examples (1) oxypropylated trimethylol propane is reacted with excess tolylene diisocyanate in trichlorofluoromethane; (2) and (3) oxypropylated tolylene diamines and oxypropylated sorbitol are reacted with tolylene diisocyanate. Specifications 892,557 and 926,414 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4799562A GB988917A (en) | 1962-12-19 | 1962-12-19 | Improvements in or relating to the manufacture of polyurethanes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4799562A GB988917A (en) | 1962-12-19 | 1962-12-19 | Improvements in or relating to the manufacture of polyurethanes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB988917A true GB988917A (en) | 1965-04-14 |
Family
ID=10446994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4799562A Expired GB988917A (en) | 1962-12-19 | 1962-12-19 | Improvements in or relating to the manufacture of polyurethanes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB988917A (en) |
-
1962
- 1962-12-19 GB GB4799562A patent/GB988917A/en not_active Expired
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