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公开(公告)号：PL1644428T5
公开(公告)日：2024-07-15
申请号：PL04748700
申请日：2004-07-02
Applicant: STAHL INT B V
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公开(公告)号：DK1644428T4
公开(公告)日：2024-05-27
申请号：DK04748700
申请日：2004-07-02
Applicant: STAHL INT B V
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公开(公告)号：AU2004253814B2
公开(公告)日：2009-12-17
申请号：AU2004253814
申请日：2004-07-02
Applicant: STAHL INT B V
Inventor： HESSELMANS LAURENTIUS CORNELIUS JOSEPHUS , MUNNEKE JACOB CHRISTIAN , DERKSEN ANDRIES JOHANNES
Abstract: A process for the preparation of stable aqueous polycarbodiimide dispersions, to be used as crosslinking agent, which are free of organic solvents is described. Sid process is characterized in: reacting a polyisocyanate in the presence of a carbodiimide catalyst to form a polycarbodiimide, terminating and/or chain extending the polycarbodiimide chain by the addition of formation dispersion of the resulting compound in water, wherein pH is adjusted to a value between 9 and 14 by the addition of a base and/or a buffer to the water used for the dispersion and/or to the obtained aqueous dispersion. According to the present process said terminating or chain extending with the compound containing a hydrophylic group and one or more amine functions may also occur during or after the dispersion of the polycarboiimide in water. The preferred pH of the polycarbodiimide dispersions is between 11 and 13. Furthermore the invention related to a coating mixture comprising the polycarbodiimide dispersions obtained by the invention as crosslinking agent and an aqueous resin containing carboxylic acid functions. Finally the invention comprises cured material obtained by applying said coating mixture to a substrate, and evaporating the water.
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公开(公告)号：PL1644428T3
公开(公告)日：2014-09-30
申请号：PL04748700
申请日：2004-07-02
Applicant: STAHL INT B V
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