NZ224659A - Preparing rigid foams from polymethylene polyphenyl polyisocyanate compositions - Google Patents

Preparing rigid foams from polymethylene polyphenyl polyisocyanate compositions

Info

Publication number
NZ224659A
NZ224659A NZ224659A NZ22465988A NZ224659A NZ 224659 A NZ224659 A NZ 224659A NZ 224659 A NZ224659 A NZ 224659A NZ 22465988 A NZ22465988 A NZ 22465988A NZ 224659 A NZ224659 A NZ 224659A
Authority
NZ
New Zealand
Prior art keywords
polymethylene polyphenyl
rigid foams
contg
pref
polyisocyanate
Prior art date
Application number
NZ224659A
Inventor
Otto Dueber
Berend Eling
Original Assignee
Ici Plc
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 Ici Plc filed Critical Ici Plc
Publication of NZ224659A publication Critical patent/NZ224659A/en

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
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
    • C08G18/78—Nitrogen
    • C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
    • 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
    • C08G18/16—Catalysts
    • C08G18/22—Catalysts containing metal compounds
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent

Abstract

A method is claimed for prepn. of rigid foams comprising reacting under foam forming conditions: a) a polymethylene polyphenyl polyisocyanate compsn. (I) contg. not more than 20 (pref. less than 15)wt. % diisocyanates and not more than 20 (pref. less than 10)wt. % polyisocyanates contg. more than 5 NCO gps. per mol.; with b) a polyfunctional active H cpd. Pref. the reaction is carried out wtih greater than a stoichiometric amount of (I) in the presence of a trimerisation catalyst. Also claimed is a polyisocyanate compsn. contg. 0-20 wt. % diisocyanate, 40-80 wt. % triisocyanate, 5-25 wt. % tetra/pentaisocyanate and not more than 20 wt. % polyisocyanate, and wherein the NCO value is 32-33.3 wt. %.
NZ224659A 1987-05-26 1988-05-17 Preparing rigid foams from polymethylene polyphenyl polyisocyanate compositions NZ224659A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB878712364A GB8712364D0 (en) 1987-05-26 1987-05-26 Rigid foams

Publications (1)

Publication Number Publication Date
NZ224659A true NZ224659A (en) 1990-08-28

Family

ID=10617928

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ224659A NZ224659A (en) 1987-05-26 1988-05-17 Preparing rigid foams from polymethylene polyphenyl polyisocyanate compositions

Country Status (10)

Country Link
KR (1) KR970002520B1 (en)
AT (1) ATE94182T1 (en)
CA (1) CA1322816C (en)
DK (1) DK289088A (en)
FI (1) FI882485A (en)
GB (1) GB8712364D0 (en)
HK (1) HK1001692A1 (en)
NO (1) NO882283L (en)
NZ (1) NZ224659A (en)
PT (1) PT87571B (en)

Also Published As

Publication number Publication date
PT87571A (en) 1989-05-31
CA1322816C (en) 1993-10-05
HK1001692A1 (en) 1998-07-03
FI882485A0 (en) 1988-05-26
PT87571B (en) 1992-12-31
NO882283D0 (en) 1988-05-25
FI882485A (en) 1988-11-27
NO882283L (en) 1988-11-28
KR880014023A (en) 1988-12-22
KR970002520B1 (en) 1997-03-05
DK289088D0 (en) 1988-05-26
ATE94182T1 (en) 1993-09-15
GB8712364D0 (en) 1987-07-01
DK289088A (en) 1988-11-27

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