GB1199561A – Improvements in and relating to Polyurethanes.
– Google Patents
GB1199561A – Improvements in and relating to Polyurethanes.
– Google Patents
Improvements in and relating to Polyurethanes.
Info
Publication number
GB1199561A
GB1199561A
GB2376166A
GB2376166A
GB1199561A
GB 1199561 A
GB1199561 A
GB 1199561A
GB 2376166 A
GB2376166 A
GB 2376166A
GB 2376166 A
GB2376166 A
GB 2376166A
GB 1199561 A
GB1199561 A
GB 1199561A
Authority
GB
United Kingdom
Prior art keywords
polyurethane
formaldehyde
polyurethanes
solution
reaction
Prior art date
1966-05-27
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
GB2376166A
Inventor
William Stanley Short
Derek Binias
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.)
Yorkshire Dyeware and Chemical Co Ltd
Original Assignee
Yorkshire Dyeware and Chemical Co 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.)
1966-05-27
Filing date
1966-05-27
Publication date
1970-07-22
1966-05-27
Application filed by Yorkshire Dyeware and Chemical Co Ltd
filed
Critical
Yorkshire Dyeware and Chemical Co Ltd
1966-05-27
Priority to GB2376166A
priority
Critical
patent/GB1199561A/en
1970-07-22
Publication of GB1199561A
publication
Critical
patent/GB1199561A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
C08G18/08—Processes
C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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
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
C08G18/4825—Polyethers containing two hydroxy groups
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
C08G18/83—Chemically modified polymers
C08G18/84—Chemically modified polymers by aldehydes
Abstract
1,199,561. Polyurethanes. YORKSHIRE DYEWARE & CHEMICAL CO. Ltd. 25 Aug., 1967 [27 May, 1966], No. 23761/66. Heading C3R. Polyurethanes having a plurality of methylol groups along the length of the molecule, and appendant to the polymer chain may be prepared by reacting the polyurethane with formaldehyde in solution, the reaction mixture being substantially free from water, and the amount of formaldehyde used being from 0À4 to 1À4% based on the weight of the solid polyurethane. The polyurethane is suitably one based on a polyether, polyester or polyesteramide. The reaction may be carried out under acidic conditions using 1% of glacial acetic acid or under alkaline conditions using 1% of pyridine. Preferably, a 45% solution of the polyurethane in ethylacetate is reacted with an aqueous or alcoholic solution of formaldehyde or formaldehyde in the form of a gas. The polyurethane so obtained may be cured with a polyisocyanate.
GB2376166A
1966-05-27
1966-05-27
Improvements in and relating to Polyurethanes.
Expired
GB1199561A
(en)
Priority Applications (1)
Application Number
Priority Date
Filing Date
Title
GB2376166A
GB1199561A
(en)
1966-05-27
1966-05-27
Improvements in and relating to Polyurethanes.
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB2376166A
GB1199561A
(en)
1966-05-27
1966-05-27
Improvements in and relating to Polyurethanes.
Publications (1)
Publication Number
Publication Date
GB1199561A
true
GB1199561A
(en)
1970-07-22
Family
ID=10200900
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2376166A
Expired
GB1199561A
(en)
1966-05-27
1966-05-27
Improvements in and relating to Polyurethanes.
Country Status (1)
Country
Link
GB
(1)
GB1199561A
(en)
1966
1966-05-27
GB
GB2376166A
patent/GB1199561A/en
not_active
Expired
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Legal Events
Date
Code
Title
Description
1970-12-02
PS
Patent sealed
1971-05-26
433D
Application made for revocation (sect. 33/1949)
1974-10-16
933D
Application refused (sect. 33/1949)
1976-03-24
PLNP
Patent lapsed through nonpayment of renewal fees
