Process for the production of open-celled rigid polyurethane foams useful as insulating materials
Prodn. of open-celled rigid polyurethane foams (I) is effected by application of an external pressure to (partly) closed-cell rigid polyurethane foams (II), pref. by conventional mfr. of (II) in a mould followed by covering the mould with a gas-impermeable film and applying pressure. Also claimed is...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
10.07.1996
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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Summary: | Prodn. of open-celled rigid polyurethane foams (I) is effected by application of an external pressure to (partly) closed-cell rigid polyurethane foams (II), pref. by conventional mfr. of (II) in a mould followed by covering the mould with a gas-impermeable film and applying pressure. Also claimed is use of (I) as a filler material in evacuated insulation panels, with (I) being enclosed in a plastics and/or metal gas-impermeable film prior to the evacuation. |
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Bibliography: | Application Number: CN19951005536 |