GB971649A - Process for preparing non-volatile high molecular isocyanate solutions - Google Patents

Process for preparing non-volatile high molecular isocyanate solutions

Info

Publication number
GB971649A
GB971649A GB2323361A GB2323361A GB971649A GB 971649 A GB971649 A GB 971649A GB 2323361 A GB2323361 A GB 2323361A GB 2323361 A GB2323361 A GB 2323361A GB 971649 A GB971649 A GB 971649A
Authority
GB
United Kingdom
Prior art keywords
high molecular
extractant
saturated aliphatic
volatile high
diisocyanate
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
GB2323361A
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.)
Hodogaya Chemical Co Ltd
Original Assignee
Hodogaya 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.)
Filing date
Publication date
Application filed by Hodogaya Chemical Co Ltd filed Critical Hodogaya Chemical Co Ltd
Publication of GB971649A publication Critical patent/GB971649A/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
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step

Abstract

A non-volatile high molecular organic isocyanate solution is manufactured by reacting a saturated aliphatic polyhydric alcohol with more than 1 mol. organic diisocyanate (b.p. below 300 DEG C.) selected from saturated aliphatic arylene and aryl-alkylene diisocyanates, per mol. of hydroxyl group in the alcohol, removing uncharged diisocyanate by liquid-liquid extraction at below the m.p. of said high molecular isocyanate with a mixed extractant consisting of Y saturated aliphatic or alicyclic hydrocarbons or mixtures thereof and X-acetic acid alkyl esters, alkyl carbonates, dialkylketones, dialkylethers, alkoxyalkyl acetates, chlorinated aliphatic hydrocarbons, wherein selected extractant X has a higher b.p. than selected extractant Y; Y is then removed by fractional distillation, with or without addition of further X to give the desired solution in extractant X. Specification 840,550 and German Specifications 953,012 and 1,090,196 are referred to.
GB2323361A 1960-06-27 1961-06-27 Process for preparing non-volatile high molecular isocyanate solutions Expired GB971649A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2885060 1960-06-27

Publications (1)

Publication Number Publication Date
GB971649A true GB971649A (en) 1964-09-30

Family

ID=12259835

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2323361A Expired GB971649A (en) 1960-06-27 1961-06-27 Process for preparing non-volatile high molecular isocyanate solutions

Country Status (1)

Country Link
GB (1) GB971649A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114195974A (en) * 2021-12-06 2022-03-18 季华实验室 Polyurethane prepolymer and preparation method thereof, and polyurethane product

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114195974A (en) * 2021-12-06 2022-03-18 季华实验室 Polyurethane prepolymer and preparation method thereof, and polyurethane product

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