公开(公告)号：CA2024714C

公开(公告)日：1998-06-23

申请号：CA2024714

申请日：1990-09-06

Applicant: BASF AG

Inventor： VOLKERT OTTO

IPC: B32B27/00 ,  C08G18/00 ,  C08G18/42 ,  C08G18/48 ,  C08G18/76 ,  C08J9/12 ,  C08J9/14 ,  C08L75/04 ,  F25D11/00

Abstract: A process is disclosed for the preparation of a polyurethane rigid foam having a low thermal conductivity. This process comprises reacting an organic and/or modified organic polyisocyanate with at least one higher molecular weight compound having at least two reactive hydrogen atoms, and optionally lower molecular weight chain extending agents and/or crosslinking agents in the presence of a blowing agent and a catalyst. The blowing agent consists of cyclopentane or of a mixture comprising cyclopentane and/or cyclohexane and at least one compound homogeneously miscible with cyclopentane and/or cyclohexane, such compound preferably having a boiling point below 35.degree.C and being selected from the group consisting of alkanes, cycloalkanes having a maximum of 4 carbon atoms, dialkylethers, cycloalkylene ethers and fluoroalkanes. The cyclopentane or above mixture is used in conjunction with water. The so obtained polyurethane rigid foam can be used in the low temperature appliance industry and as an insulating material in a heating and composite element.

公开(公告)号：AU2770197A

公开(公告)日：1997-11-26

申请号：AU2770197

申请日：1997-04-24

Applicant: BASF AG

Inventor： VOLKERT OTTO ,  PITTRICH KLAUS

IPC: C08G18/10 ,  C08G18/48 ,  C08G18/76 ,  C08G101/00

Abstract: Elastic polyurethane moldings having a compact surface and a cellular core are produced by reactinga) modified organic polyisocyanates withb) at least one relatively high molecular weight compound containing at least two reactive hydrogen atoms and, if desired,c) low molecular weight chain extenders in the presence ofd) blowing agents,e) catalysts and, if desired,f) customary auxiliaries and/or additivesin a closed mold with compaction, wherein the modified organic polyisocyanate used is at least one reaction product of pure MDI and at least one polyether alcohol (polyoxyalkylene polyol), the modified organic polyisocyanate having an NCO content of

公开(公告)号：CA2253903A1

公开(公告)日：1997-11-13

申请号：CA2253903

申请日：1997-04-24

Applicant: BASF AG

Inventor： PITTRICH KLAUS ,  VOLKERT OTTO

IPC: C08G18/10 ,  C08G18/48 ,  C08G18/76 ,  C08G101/00 ,  C08G18/66 ,  C08J9/34

Abstract: A process for the production of elastic polyurethane mouldings with compact surfaces and cellular cores by reacting a) modified organic polyisocyanates with b) at least one compound with at least two reactive hydrogen atoms and possibly c) chain-lengthening agents in the presence of d) blowing agents, e) catalysts and possibly f) conventional auxiliaries and/or additives, in a closed mould under compression, in which at least one reaction product of pure MDI and at least one polyether alcohol (polyoxyalkylene polyol) with an NCO content of

公开(公告)号：CA2024714A1

公开(公告)日：1991-04-07

申请号：CA2024714

申请日：1990-09-06

Applicant: BASF AG

Inventor： VOLKERT OTTO

IPC: B32B27/00 ,  C08G18/00 ,  C08G18/42 ,  C08G18/48 ,  C08G18/76 ,  C08J9/12 ,  C08J9/14 ,  C08L75/04 ,  F25D11/00

Abstract: The invention relates to a process for preparation of rigid polyurethane foams having low thermal conductivity by reacting …… a) organic and/or modified organic polyisocyanates with … b) at least one relatively high molecular weight compound having at least two reactive hydrogen atoms and optionally … c) low molecular weight chain extenders and/or crosslinking agents in the presence of … d) cyclopentane (d1) or mixtures (d2) which contain: …… d2i) cyclopentane and/or cyclohexane and … d2ii) at least one compound which is homogeneously miscible with cyclopentane and/or cyclohexane and preferably has a boiling point below 35 DEG C, selected from the group consisting of the alkanes, cycloalkanes having not more than 4 carbon atoms, dialkyl ethers, cycloalkylene ethers and fluoroalkanes,… optionally in conjunction with water, as blowing agents (d), …… e) catalysts and optionally … f) auxiliaries and/or additives. …… The rigid polyurethane foams are used in the refrigerator industry and as insulating material in heating and composite elements.

公开(公告)号：CA998056A

公开(公告)日：1976-10-05

申请号：CA175303

申请日：1973-06-29

Applicant: BASF AG

Inventor： HICKMANN ECKHARD ,  FISCHER MARTIN ,  VOLKERT OTTO ,  JUN MONG-JON

IPC: C08F2/00 ,  C07C45/00 ,  C07C45/71 ,  C07C49/84 ,  C07C67/00 ,  C07D309/12 ,  C08F2/46 ,  C08F2/50 ,  G03F7/031 ,  G21C13/073 ,  G21C13/093

公开(公告)号：CA912042A

公开(公告)日：1972-10-10

申请号：CA912042D

Applicant: BASF AG

Inventor： VOLKERT OTTO ,  HARTMANN HEINRICH ,  KRAUCH CARL H ,  HOFFMANN HORST