HK1001692A1 - Process for the preparation of rigid foams - Google Patents

Process for the preparation of rigid foams

Info

Publication number
HK1001692A1
HK1001692A1 HK98100576A HK98100576A HK1001692A1 HK 1001692 A1 HK1001692 A1 HK 1001692A1 HK 98100576 A HK98100576 A HK 98100576A HK 98100576 A HK98100576 A HK 98100576A HK 1001692 A1 HK1001692 A1 HK 1001692A1
Authority
HK
Hong Kong
Prior art keywords
contg
pref
polyisocyanate
rigid foams
compsn
Prior art date
Application number
HK98100576A
Inventor
Ernst 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 HK1001692A1 publication Critical patent/HK1001692A1/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

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. %.
HK98100576A 1987-05-26 1998-01-22 Process for the preparation of rigid foams HK1001692A1 (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
HK1001692A1 true HK1001692A1 (en) 1998-07-03

Family

ID=10617928

Family Applications (1)

Application Number Title Priority Date Filing Date
HK98100576A HK1001692A1 (en) 1987-05-26 1998-01-22 Process for the preparation of rigid foams

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
PT87571B (en) 1992-12-31
NO882283D0 (en) 1988-05-25
GB8712364D0 (en) 1987-07-01
KR970002520B1 (en) 1997-03-05
DK289088A (en) 1988-11-27
DK289088D0 (en) 1988-05-26
PT87571A (en) 1989-05-31
FI882485A0 (en) 1988-05-26
KR880014023A (en) 1988-12-22
FI882485A (en) 1988-11-27
CA1322816C (en) 1993-10-05
ATE94182T1 (en) 1993-09-15
NO882283L (en) 1988-11-28
NZ224659A (en) 1990-08-28

Similar Documents

Publication Publication Date Title
GB1572781A (en) Low-temperature storage stable liquid diphenylmethyne diisocyanates
DE3365163D1 (en) Liquid polysocyanate mixtures containing urethane groups on the basis of diphenylmethane diisocyanate, process for the preparation thereof and their use in the preparation of flexible polyurethane foams
KR920009870A (en) Isocyanate-terminated prepolymers and flexible polyurethane foams prepared therefrom
CA2161694A1 (en) Process for making flexible foams
AU6798990A (en) Manufacture of polyurethane foam
CA2032716A1 (en) Polyisocyanate mixtures and their use in the preparation of flexible polyurethane foams
DK0676434T3 (en) Process for the production of fluorochlorohydrocarbon-free high elastic soft polyurethane foams and suitable poles
EP0293211A3 (en) Polyisocyanurate rigid foams
IE41415L (en) Modified polyisocyanates for use in the production of¹hydrophilic polyurethane foams
ATE197705T1 (en) USE OF 3,(4)-SUBSTITUTED PYRROLIDINES AS CATALYSTS FOR THE POLYISOCYANATE POLYADDITION PROCESS AND PROCESS FOR PRODUCING POLYURETHANE (UREA).
EP0795572A3 (en) Polyester-polyol, process for preparing polyurethane foam and use thereof
AU4169789A (en) Process for making low density flexible molded and slabstock polyurethane foams
HK1001692A1 (en) Process for the preparation of rigid foams
EP0361937A3 (en) Process for preparing polyurea or polyurethane/urea foam
EP0295568A3 (en) A process for manufacturing rigid polyurethane foam
ES487339A1 (en) Polyisocyanates, process for their preparation and their use.
EP0251952A3 (en) Process for the preparation of polyisocyanates having a biuret structure
CA2092577A1 (en) Process for making flexible foams
DE59802312D1 (en) Process for the production of flexible polyurethane foams
PT88559A (en) Water-blown methylene di:isocyanate based flexible polyurethane foam - has specific density and compression hardness obtd. by reacting methylene di:phenyl isocyanate with active hydrogen cpd. e.g. polyether
JPS6438102A (en) Nonexpansible binder for hollow yarn
HUP9903048A2 (en) Process for preparing compact or cellular polyurethane elastomers and isocyanate prepolymers suitable for this purpose
TH30927A (en) Method for preparing polyurethane elastomer
HUP0002900A2 (en) Isocyanate compositions for blown polyurethane foams
TH36131A3 (en) Process for rigid polyurethane foam

Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)