GB974169A - Improvements in or relating to polyurethanes - Google Patents

Improvements in or relating to polyurethanes

Info

Publication number
GB974169A
GB974169A GB3943861A GB3943861A GB974169A GB 974169 A GB974169 A GB 974169A GB 3943861 A GB3943861 A GB 3943861A GB 3943861 A GB3943861 A GB 3943861A GB 974169 A GB974169 A GB 974169A
Authority
GB
United Kingdom
Prior art keywords
polyol
condensation product
weight
propylene oxide
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
Application number
GB3943861A
Inventor
Ronald Arthur Simcock
Ernest Seijo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell Research Ltd
Original Assignee
Shell Research Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shell Research Ltd filed Critical Shell Research Ltd
Priority to GB3943861A priority Critical patent/GB974169A/en
Publication of GB974169A publication Critical patent/GB974169A/en
Expired legal-status Critical Current

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
    • C08G18/4833—Polyethers containing oxyethylene units
    • C08G18/4837—Polyethers containing oxyethylene units and other oxyalkylene units
    • C08G18/4841—Polyethers containing oxyethylene units and other oxyalkylene units containing oxyethylene end groups

Abstract

A modification of the process of the parent Specification comprises forming the polyurethane as a reaction product of (a) an organic polyisocyanate or polyisothiocyanate with (b) a polyether reactant which comprises a polyol having an average molecular weight of at least 4,000 and formed by reacting (1) a condensation product of an alkylene oxide reactant and an organic compound having at least three active hydrogen atoms in the molecule with (2) at least 1% but less than 10% by weight (of the alkylene oxide content of the condensation product) of ethylene oxide and effecting foam formation with the aid of an organic foaming agent which is present in the reaction mixture in which the polyurethane is formed. The invention is particularly applicable to the preparation of foams by the one-shot technique. Suitable foaming agents are halohydrocarbons, aliphatic hydrocarbons and ethers. The foaming agent can be a gaseous organic compound i.e. a gas at 0 DEG C. and normal pressure or a volatile organic liquid of boiling point up to 75 DEG C. Halogenated hydrocarbons, aliphatic hydrocarbons and ethers are referred to. Preferred reactants are (a) a toluene diisocyanate or a diphenyl methane diisocyanate and (b) a polyol obtained by reacting (1) a condensation product of 1, 2-propylene oxide and an organic compound having at least 3 hydroxy groups in the molecule, preferably glycerol and having a molecular weight between 4,000 and 8,000, e.g. between 4,800 and 5,200 with (2) preferably between 2 and 5% and advantageously about 3% of ethylene oxide (by weight of the propylene oxide content of the condensation product). Low density foams result when the reaction mixture contains a small proportion of water (e.g. 2.5 to 4% of the weight of polyol). Glycol can also be used as cross-linking agent. In Example (1) the polyol is a reaction product of glycerol successively with propylene oxide and ethylene oxide. This is converted to foam by the one shot process by reaction with toluene-2,4-and 2,6-diisocyanates, water, triethylene diamine, stannous octoate, silicone and monofluorotrichloromethane. In a comparison example the polyol used is a glycerol/propylene oxide condensate of average molecular weight about 3,000. Specification 901,362 also is referred to.
GB3943861A 1961-11-03 1961-11-03 Improvements in or relating to polyurethanes Expired GB974169A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3943861A GB974169A (en) 1961-11-03 1961-11-03 Improvements in or relating to polyurethanes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3943861A GB974169A (en) 1961-11-03 1961-11-03 Improvements in or relating to polyurethanes

Publications (1)

Publication Number Publication Date
GB974169A true GB974169A (en) 1964-11-04

Family

ID=10409547

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3943861A Expired GB974169A (en) 1961-11-03 1961-11-03 Improvements in or relating to polyurethanes

Country Status (1)

Country Link
GB (1) GB974169A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380967A (en) * 1963-01-11 1968-04-30 Lankro Chem Ltd Polyethers and polyurethanes obtained therefrom
US3467606A (en) * 1966-06-27 1969-09-16 Jefferson Chem Co Inc Semiflexible polyurethane foam prepared in absence of surfactant
EP0207296A2 (en) * 1985-06-01 1987-01-07 BASF Aktiengesellschaft Process for the preparation of flexible polyurethane foams, and the moulded parts prepared by this process
EP0322912A1 (en) * 1987-12-30 1989-07-05 Union Carbide Corporation Process for the manufacture of low density, flexible polyurethane foams
EP0433878A2 (en) * 1989-12-21 1991-06-26 BASF Aktiengesellschaft Process for the preparation of flexible polyurethane foams with viscoelastic, body-sound damping properties and the polyalkoxide-polyol blends for this process

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380967A (en) * 1963-01-11 1968-04-30 Lankro Chem Ltd Polyethers and polyurethanes obtained therefrom
US3467606A (en) * 1966-06-27 1969-09-16 Jefferson Chem Co Inc Semiflexible polyurethane foam prepared in absence of surfactant
EP0207296A2 (en) * 1985-06-01 1987-01-07 BASF Aktiengesellschaft Process for the preparation of flexible polyurethane foams, and the moulded parts prepared by this process
EP0207296A3 (en) * 1985-06-01 1987-05-13 Basf Aktiengesellschaft Process for the preparation of flexible polyurethane foams, and the moulded parts prepared by this process
EP0322912A1 (en) * 1987-12-30 1989-07-05 Union Carbide Corporation Process for the manufacture of low density, flexible polyurethane foams
US4883825A (en) * 1987-12-30 1989-11-28 Union Carbide Chemicals And Plastics Company Inc. Process for the manufacture of low density, flexible polyurethane foams
EP0433878A2 (en) * 1989-12-21 1991-06-26 BASF Aktiengesellschaft Process for the preparation of flexible polyurethane foams with viscoelastic, body-sound damping properties and the polyalkoxide-polyol blends for this process
EP0433878A3 (en) * 1989-12-21 1991-11-06 Basf Aktiengesellschaft Process for the preparation of flexible polyurethane foams with viscoelastic, body-sound damping properties and the polyalkoxide-polyol blends for this process

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