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Patent Agency Ranking
公开(公告)号：DE4333930A1
公开(公告)日：1995-04-06
申请号：DE4333930
申请日：1993-10-05
Applicant: BASF AG
Inventor： BRAUNE PETER DR
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公开(公告)号：ES2129560T3
公开(公告)日：1999-06-16
申请号：ES94115098
申请日：1994-09-24
Applicant: BASF AG
Inventor： BRAUNE PETER DR
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公开(公告)号：DE19608614A1
公开(公告)日：1997-09-11
申请号：DE19608614
申请日：1996-03-06
Applicant: BASF AG
Inventor： BRAUNE PETER DR
Abstract: The invention concerns a method of reprocessing residues which contain dihydroxy compounds and are obtained during the production of polyesters. According to this method: (1) in a first step, a dicarboxylic acid or its esters or ester-forming derivatives with a molar excess of dihydroxy compound are esterified or transesterified; (2) in at least one second step, the esterification product obtained according to (1) is polycondensed; and (3) the vapours (a) and (b) produced according to (1) and (2) are subjected to a treatment for recovering the starting substances. This method is characterized in that the treatment for recovering the starting substances is carried out in the presence of an alkali or alkaline earth compound in an amount of between 0.5 and 10 wt.% calculated as alkali metal or alkaline earth metal relative to the solids content of the vapours.
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公开(公告)号：DE19509551A1
公开(公告)日：1996-09-19
申请号：DE19509551
申请日：1995-03-16
Applicant: BASF AG
Inventor： BRAUNE PETER DR
Abstract: In a thermoplastic polyester continuous production process, a dicarboxylic acid or its esters or its ester-forming derivatives are esterified or transesterified during a first step (a) with a molar excess of a dihydroxyl compound; the esterification or transesterification product obtained in step (a) is precondensed in a second step (b); and the product obtained during step (b) is polycondensed during a third step (c). Steps (a) and/or (b) of the process are carried out in at least two different temperature zones.
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公开(公告)号：DE3831243A1
公开(公告)日：1990-03-22
申请号：DE3831243
申请日：1988-09-14
Applicant: BASF AG
Inventor： MC KEE GRAHAM EDMUND DR , PIPPER GUNTER , GOETZ WALTER DR , BLINNE GERD DR , KNOLL MANFRED , BRAUNE PETER DR , LAUSBERG DIETRICH DR , BAIERWECK PETRA DR
IPC: C08K3/00 , C08K3/02 , C08K5/00 , C08K7/02 , C08K7/14 , C08K7/16 , C08L23/08 , C08L23/16 , C08L67/02 , C08L69/00 , C08L77/00 , C08L77/02 , C08L77/06
Abstract: Thermoplastic moulding material of the following composition (I): (A) 30 to 97 weight % of a thermoplastic polyester or polyamide or of a mixture of said polymers, whereby said polymers or their mixture have a viscosity index greater than 165; (B) 3 to 40 weight % of an olefin polymerizate, comprised of (b1) 40 to 100 weight % of at least one alpha -olefin with 2 to 8 atoms of C, (b2) 0 to 50 weight % of a diene, (b3) 0 to 45 weight % of a primary or secondary C1 to C12 acrylic acid or methacrylic acid alkylester or mixtures of such esters, (b4) 0 to 40 weight % of an ethylenically unsaturated monocarboxylic or bicarboxylic acid and/or a functional derivative of such an acid, (b5) 0 to 40 weight % of a monomer containing epoxy groups, with the provision that the component (B) is not an olefin homopolymerizate and that it has a gel content no greater than 50 %; (C) 0 to 60 weight % of fillers in fibre or particle form, or mixtures thereof; and (D) 0 to 40 % of a flame protection agent; or of the following composition (II): (A) 20 to 99 weight % of a thermoplastic polyester or polyamide or of a mixture of said polymers; (D) 1 to 40 weight % of a flame protection agent; (B) 0 to 20 % of an olefin polymerizate; and (C) 0 to 60 weight % of fillers in fibre or particle form or mixtures thereof. Said thermoplastic moulding materials can be produced by thermal treatment of mixtures of a type (A) component (component A'), whose viscosity index is lesser than 160, with the remaining components, at temperatures between 60 DEG C below and 60 DEG C above the melting point of the pure component (A).
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