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公开(公告)号:JP5074400B2
公开(公告)日:2012-11-14
申请号:JP2008530480
申请日:2006-09-05
Applicant: ビーエーエスエフ ソシエタス・ヨーロピアBasf Se
Inventor: シュミット アンドレアス , シュトレーファー エックハルト , クラーゼ フォルカー , シェルベル ペーター , クレッツァー マティアス
IPC: C07C263/04 , C07B61/00 , C07C265/14 , C07C269/04 , C07C271/20
CPC classification number: C07C263/04 , C07C269/04 , C07C271/12 , C07C265/14
Abstract: The invention provides a multistage process for continuously preparing organic, distillable polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding organic polyamines with carbonic acid derivatives and alcohols to low molecular mass monomeric polyurethanes, and thermally cleaving said polyurethanes, in which at defined reaction stages the polyisocyanates prepared and unusable residues are separated off, and reusable by products and intermediates are recycled to upstream stages.
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公开(公告)号:JP2009507886A
公开(公告)日:2009-02-26
申请号:JP2008530480
申请日:2006-09-05
Applicant: ビーエーエスエフ ソシエタス・ヨーロピアBasf Se
Inventor: シュミット アンドレアス , シュトレーファー エックハルト , クラーゼ フォルカー , シェルベル ペーター , クレッツァー マティアス
IPC: C07C263/04 , C07B61/00 , C07C265/14
CPC classification number: C07C263/04 , C07C269/04 , C07C271/12 , C07C265/14
Abstract: The invention provides a multistage process for continuously preparing organic, distillable polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding organic polyamines with carbonic acid derivatives and alcohols to low molecular mass monomeric polyurethanes, and thermally cleaving said polyurethanes, in which at defined reaction stages the polyisocyanates prepared and unusable residues are separated off, and reusable by products and intermediates are recycled to upstream stages.
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