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公开(公告)号：DE59108794D1
公开(公告)日：1997-08-28
申请号：DE59108794
申请日：1991-11-21
Applicant: BASF AG
Inventor： WALTER MANFRED DR , HUSEMANN WOLFRAM DR , NAEGELE DIETER DR
IPC: C08J9/14 , C08F2/18 , C08F2/44 , C08F4/34 , C08J9/00 , C08J9/16 , C08K5/00 , C08K5/01 , C08L25/04
Abstract: Expandable styrene polymers, containing …… a) a styrene polymer … b) from 1 to 10% by weight, based on a), of a saturated C3- to C6-hydrocarbon as blowing agent, and optionally … c) conventional assistants in effective amounts, … characterised in that the benzene content is less than 1 ppm and the styrene content is less than 2000 ppm.
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公开(公告)号：DE19540951A1
公开(公告)日：1997-05-07
申请号：DE19540951
申请日：1995-11-03
Applicant: BASF AG
Inventor： HAEHNLE HANS-JOACHIM DR , WALTER MANFRED DR , TROPSCH JUERGEN DR , SCHORNICK GUNNAR DR , ANSTOCK THOMAS DR
IPC: A61L15/00 , A61L15/42 , A61L15/60 , C08F2/16 , C08F220/06 , C08J9/30 , C08L33/02 , C08F265/02 , A61L15/24 , B01J20/26 , C08F265/10 , C08F267/02 , C08F273/00 , C08L35/00 , C09K3/10 , C09K3/32
Abstract: The invention concerns water-absorbent cellular crosslinked-polymer materials produced by (I) foaming a polymerizable aqueous mixture containing: (a) acid-group-containing monoethylenically unsaturated monomers which have been neutralized to at least 50 mol %; (b) optionally, other monoethylenically unsaturated monomers; (c) crosslinking agents; (d) initiators; (e) 0.1 to 20 % by wt. of at least one surfactant; (f) optionally, at least one solubilizer and (g) optionally, thickeners, foam stabilizers, polymerization-control agents, fillers and/or cell-nucleation agents, the foaming being carried out by dispersing throughout the mixture fine bubbles of a gas which is inert to radicals, and (II) polymerizing the foamed mixture to form a cellular hydrogel and adjusting the water content of the cellular hydrogel to 1 to 45 % by wt. The invention also concerns methods of producing such polymer materials and their use in personal-hygiene articles used to absorb body fluids and in bandage material used to cover injuries.
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公开(公告)号：ES2086828T3
公开(公告)日：1996-07-01
申请号：ES93109566
申请日：1993-06-16
Applicant: BASF AG
Inventor： WITT MICHAEL DR , WALTER MANFRED DR
Abstract: Bead-formed expandable styrene polymers are obtained by suspension polymerisation of styrene with addition of from 1 to 10% by weight of C3- to C7-hydrocarbons and/or carbon dioxide as blowing agent and optionally conventional additives, where the suspension stabiliser used is a mixture of magnesium pyrophosphate, a sulphonate group-containing extender and an alkali or alkaline-earth metal carboxylate, magnesium pyrophosphate being prepared directly before the polymerisation by combining an aqueous solution with an alkali metal pyrophosphate with at least the stoichiometrically necessary amount of a magnesium salt.
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公开(公告)号：AT138395T
公开(公告)日：1996-06-15
申请号：AT93109566
申请日：1993-06-16
Applicant: BASF AG
Inventor： WITT MICHAEL DR , WALTER MANFRED DR
Abstract: Bead-formed expandable styrene polymers are obtained by suspension polymerisation of styrene with addition of from 1 to 10% by weight of C3- to C7-hydrocarbons and/or carbon dioxide as blowing agent and optionally conventional additives, where the suspension stabiliser used is a mixture of magnesium pyrophosphate, a sulphonate group-containing extender and an alkali or alkaline-earth metal carboxylate, magnesium pyrophosphate being prepared directly before the polymerisation by combining an aqueous solution with an alkali metal pyrophosphate with at least the stoichiometrically necessary amount of a magnesium salt.
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公开(公告)号：DE59107542D1
公开(公告)日：1996-04-18
申请号：DE59107542
申请日：1991-11-19
Applicant: BASF AG
Inventor： WALTER MANFRED DR , HUSEMANN WOLFRAM DR , NAEGELE DIETER DR
Abstract: Expandable styrene polymers of high expandability comprise a) a styrene polymer having a viscosity, measured in toluene, of from 55 to 80 [ml/g] and a melt flow index MFI (190 DEG C., 3.8 kp) of from 7.5 to 30 [g/10 min], b) from 1 to 10% by weight, based on a), of a C3- to C6-hydrocarbon as blowing agent, and, if desired, c) conventional assistants in effective amounts.
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Patent Agency Ranking
公开(公告)号：ES2053485T3
公开(公告)日：1994-08-01
申请号：ES87111931
申请日：1987-08-18
Applicant: BASF AG
Inventor： GOERRISSEN HEINER DR , SAENGER DIETRICH , SCHUETTE WILHELM DR , WALTER MANFRED DR
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公开(公告)号：DE4038044A1
公开(公告)日：1992-06-04
申请号：DE4038044
申请日：1990-11-29
Applicant: BASF AG
Inventor： WALTER MANFRED DR , HUSEMANN WOLFRAM DR , NAEGELE DIETER DR
Abstract: Expandable styrene polymers of high expandability comprise a) a styrene polymer having a viscosity, measured in toluene, of from 55 to 80 [ml/g] and a melt flow index MFI (190 DEG C., 3.8 kp) of from 7.5 to 30 [g/10 min], b) from 1 to 10% by weight, based on a), of a C3- to C6-hydrocarbon as blowing agent, and, if desired, c) conventional assistants in effective amounts.
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公开(公告)号：DE3369331D1
公开(公告)日：1987-02-26
申请号：DE3369331
申请日：1983-10-24
Applicant: BASF AG
Inventor： SADLOWSKI JUERGEN DR , WALTER MANFRED DR , HILT ALBRECHT DR
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公开(公告)号：DE3163522D1
公开(公告)日：1984-06-14
申请号：DE3163522
申请日：1981-10-12
Applicant: BASF AG
Inventor： SCHUETTE WILHELM DR , HILT ALBRECHT DR , WALTER MANFRED DR , BOEHLKE KLAUS DR
Abstract: Polyacetal molding materials which contain, as a stabilizer, from 0.1 to 10% by weight of a melamine resin, the latter being a melamine-formaldehyde condensate, having a mean degree of polymerization of from 1.2 to 6.0 and a melamine:formaldehyde ratio of from 1:2 to 1:5.5, which has been partially etherified with a C1-C4-alkanol so that the ratio melamine:ether radicals is from 1:1.5 to 1:5.0 and the ratio melamine:free methylol groups is from 1:0.5 to 1:3. The molding materials can be converted to moldings which can be used industrially at elevated ambient temperatures.
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公开(公告)号：DE3237110A1
公开(公告)日：1984-04-12
申请号：DE3237110
申请日：1982-10-07
Applicant: BASF AG
Inventor： TAUBITZ CHRISTOF DR , WALTER MANFRED DR
IPC: C08G75/0231 , C08G75/0254 , C07C149/30
Abstract: The low-molecular-weight polyarylene sulphides are prepared by reacting a dihaloaromatic with an alkali metal sulphide in an N-alkyl-2-pyrrolidone having a boiling point above 220 DEG C at temperatures of between 180 DEG C and 350 DEG C. The reaction is preferably carried out at a temperature above the boiling point of the dehaloaromatic but below the boiling point of the N-alkylpyrrolidone at atmospheric pressure, in which the solvent and the alkali metal sulphide are initially introduced and heated to the reaction temperature and the dihaloaromatic is added at such a low rate that the temperature of the reaction mixture does not drop by more than 10 DEG C.
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