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公开(公告)号：PL341559A1
公开(公告)日：2001-04-23
申请号：PL34155998
申请日：1998-11-24
Applicant: BASF AG
Inventor： HUENGER HANS-HARALD , LUDWIG ALFONS , NEUBERG RAINER , PIPPER GUNTER , SAUER THOMAS , WILMS AXEL
Abstract: The disclosure is a process for preparing polyamides by concentrating the wash water extract from the extraction of polyamide to an extractables content of not more than 85% by weight, adding fresh lactam down to a water content of from 0.5 to 13% by weight, and effecting at least one adiabatic expansion during the polymerization.
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公开(公告)号：CZ20003436A3
公开(公告)日：2001-04-11
申请号：CZ20003436
申请日：1999-03-18
Applicant: BASF AG
Inventor： BREINER URLIKE , JULIUS MANFRED , NEUBERG RAINER , WEISS ROBERT , WILMS AXEL , HU HARRY Y
Abstract: A process for preparing polyamides comprises polymerizing starting monomers or starting oligomers in the presence of at least one compound of the formula (I)whereR is a functional group R which bears 1-4 identical or different amide-forming groups R ,R is H, C1-C20-alkyl, cycloalkyl, benzyl or OR , where R is H, C1-C20-alkyl, cycloalkyl or benzyl,R , R , R and R are independently C1-C10-alkyl,n is a natural number greater than 1, andthe piperidine derivatives attached to R are identical or different with regard to the substituents, meaning R , R , R , R and R .The polyamides are useful for preparing filaments, fibers, films, sheetlike structures and moldings.
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公开(公告)号：MXPA00008864A
公开(公告)日：2001-03-01
申请号：MXPA00008864
申请日：2000-09-11
Applicant: BASF AG
Inventor： BREINER ULRIKE , JULIUS MANFRED , NEUBERG RAINER , WEISS ROBERT , WILMS AXEL , HU HARRY Y
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公开(公告)号：ID26307A
公开(公告)日：2000-12-14
申请号：ID20001859
申请日：1999-03-18
Applicant: BASF AG
Inventor： BREINER ULRIKE , JULIUS MANFRED , NEUBERG RAINER , WEISS ROBERT , WILMS AXEL , HU HARRY Y
Abstract: A process for preparing polyamides comprises polymerizing starting monomers or starting oligomers in the presence of at least one compound of the formula (I)whereR is a functional group R which bears 1-4 identical or different amide-forming groups R ,R is H, C1-C20-alkyl, cycloalkyl, benzyl or OR , where R is H, C1-C20-alkyl, cycloalkyl or benzyl,R , R , R and R are independently C1-C10-alkyl,n is a natural number greater than 1, andthe piperidine derivatives attached to R are identical or different with regard to the substituents, meaning R , R , R , R and R .The polyamides are useful for preparing filaments, fibers, films, sheetlike structures and moldings.
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Patent Agency Ranking
公开(公告)号：ID25881A
公开(公告)日：2000-11-09
申请号：ID20000979
申请日：1998-11-24
Applicant: BASF AG
Inventor： HUNGER HANS-HARALD , LUDWIG ALFONS , NEUBERG RAINER , PIPPER GUNTER , SAUER THOMAS , WILMS AXEL
Abstract: The disclosure is a process for preparing polyamides by concentrating the wash water extract from the extraction of polyamide to an extractables content of not more than 85% by weight, adding fresh lactam down to a water content of from 0.5 to 13% by weight, and effecting at least one adiabatic expansion during the polymerization.
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公开(公告)号：SK6962000A3
公开(公告)日：2000-11-07
申请号：SK6962000
申请日：1998-11-24
Applicant: BASF AG
Inventor： HUENGER HANS-HARALD , LUDWIG ALFONS , NEUBERG RAINER , PIPPER GUNTER , SAUTER THOMAS , WILMS AXEL
Abstract: The disclosure is a process for preparing polyamides by concentrating the wash water extract from the extraction of polyamide to an extractables content of not more than 85% by weight, adding fresh lactam down to a water content of from 0.5 to 13% by weight, and effecting at least one adiabatic expansion during the polymerization.
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公开(公告)号：AU1757299A
公开(公告)日：1999-06-15
申请号：AU1757299
申请日：1998-11-24
Applicant: BASF AG
Inventor： HUNGER HANS-HARALD , LUDWIG ALFONS , NEUBERG RAINER , PIPPER GUNTER , SAUER THOMAS , WILMS AXEL
Abstract: The disclosure is a process for preparing polyamides by concentrating the wash water extract from the extraction of polyamide to an extractables content of not more than 85% by weight, adding fresh lactam down to a water content of from 0.5 to 13% by weight, and effecting at least one adiabatic expansion during the polymerization.
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公开(公告)号：CA2310085A1
公开(公告)日：1999-06-03
申请号：CA2310085
申请日：1998-11-24
Applicant: BASF AG
Inventor： LUDWIG ALFONS , PIPPER GUNTER , SAUER THOMAS , WILMS AXEL , HUNGER HANS-HARALD , NEUBERG RAINER
Abstract: A process is disclosed for producing polyamides. The extracted water produced from polyamide extraction is concentrated up to an extract content of maximum 85 wt.% and is mixed with fresh lactam up to a 0.5-13 wt.% water content, at least one adiabatic stress relief being carried out during polymerisation.
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公开(公告)号：PL307082A1
公开(公告)日：1995-08-07
申请号：PL30708295
申请日：1995-02-03
Applicant: BASF AG
Inventor： SCHNEIDER HEINZ-WALTER , WILMS AXEL , SCHMITZ RUEDIGER , SCHULZ ROBERT , MICHELSEN KLAUS
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