公开(公告)号：DE4208992A1

公开(公告)日：1993-09-23

申请号：DE4208992

申请日：1992-03-20

Applicant: BASF AG

Inventor： WALTER MANFRED DR

IPC: C08F2/18 ,  C08F2/44 ,  C08J9/00 ,  C08K5/57

Abstract: A process is disclosed for producing beaded, expansible styrene polymers that contain: (a) polystyrene and/or styrene copolymer with at least 50 % by weight styrene incorporated by polymerization; (b) 0.001 to 0.2 % by weight, in relation to (a), of an organic tin compound; and (c) 2 to 10 % by weight, in relation to (a), of an aliphatic C3-C7-hydrocarbon and/or carbon dioxide as a blowing agent. Styrene and possibly other comonomers are polymerized in an aqueous suspension and before 50 % thereof are reacted 0.001 to 0.20 % by weight of an organic tin compound, and possibly 0.2 to 4 % by weight, in relation to the monomer weight, of an organic bromine compound, are added to the mixture; 2 to 10 % by weight of a C3-C7-hydrocarbon and/or carbon dioxide are added before, during or after polymerization as a blowing agent.

公开(公告)号：DE3814783A1

公开(公告)日：1989-11-09

申请号：DE3814783

申请日：1988-04-30

Applicant: BASF AG

Inventor： KERBER MICHAEL DR ,  WALTER MANFRED DR

IPC: C08J9/20 ,  C08F2/18 ,  C08J9/00 ,  C08K5/02 ,  C08K7/00 ,  C08K7/02 ,  C08K13/04 ,  C08L23/06 ,  C08L23/08 ,  C08L25/04 ,  C08L25/06 ,  C08L31/04 ,  C08L91/06

Abstract: An expandable polymer alloy containing an ethylene-vinyl acetate copolymer, polystyrene, a short-fibre inorganic filler and, as blowing agent, a C4-C5 hydrocarbon or a halogenated C1-C2 hydrocarbon.

公开(公告)号：DE3628560A1

公开(公告)日：1988-03-03

申请号：DE3628560

申请日：1986-08-22

Applicant: BASF AG

Inventor： WALTER MANFRED DR ,  SCHUETTE WILHELM DR ,  GOERRISSEN HEINER DR

IPC: C08L59/00 ,  C08K3/32 ,  C08K3/34 ,  C08K5/13 ,  C08K5/521 ,  C08K13/02 ,  C08J5/00 ,  C08J5/18

Abstract: Polyoxymethylene molding materials having improved heat stability and consisting of (A) one or more polyoxymethylene homopolymers and/or copolymers and (B) one or more antioxidants having a sterically hindered phenolic structure, (C) with or without additives, contain (D) as an additive, one or more alkaline earth metal silicates and/or alkaline earth metal glycerophosphates, advantageously in an amount of from 0.002 to 2.0% by weight, based on the weight of component (A), for improving the heat stability, reducing the tendency to discoloration and minimizing the free formaldehyde content. To prepare the novel polyoxymethylene molding materials, the components are advantageously melted in an extruder at from 150 DEG to 260 DEG C. The polyoxymethylene molding materials are useful for the production of films or, preferably, moldings, which are used, for example, in the automotive, electrical appliances and electronics industries.

公开(公告)号：DE3620683C1

公开(公告)日：1987-07-02

申请号：DE3620683

申请日：1986-06-20

Applicant: BASF AG

Inventor： VOSS HARRO DR ,  HAHN KLAUS DR ,  WALTER MANFRED DR ,  DE DR GRAVE ISIDOOR

IPC: C08J9/16 ,  C08F2/44 ,  C08J9/14 ,  C08J9/22 ,  C08K5/01 ,  C08K5/02 ,  C08L25/04 ,  C08J9/20

Abstract: Particulate styrene polymers containing blowing agents are prepared by a process in which an aliphatic hydrocarbon of 7 to 9 carbon atoms is added in an amount of from 0.01 to 0.5% by weight, based on the styrene polymer, before, during or after the polymerization. The particulate styrene polymers can be processed to foam blocks and moldings having a satisfactory smooth surface.

公开(公告)号：DE3276321D1

公开(公告)日：1987-06-19

申请号：DE3276321

申请日：1982-11-18

Applicant: BASF AG

Inventor： SADLOWSKI JUERGEN DR ,  WALTER MANFRED DR ,  HINSELMANN KLAUS

IPC: C08G2/00 ,  C08G2/10 ,  C08G2/30

Abstract: Oxymethylene polymers are prepared by a continuous process, by mass polymerization of the monomers with the aid of conventional, preferably cationic, initiators, wherein the monomers as well as the resulting polymer are present substantially in molten form during the polymerization.

公开(公告)号：DE3167600D1

公开(公告)日：1985-01-17

申请号：DE3167600

申请日：1981-07-09

Applicant: BASF AG

Inventor： HAHN KLAUS DR ,  RATH HANS PETER DR ,  KRAPF HEINZ DR ,  DE GRAVE ISIDOOR DR ,  WALTER MANFRED DR

IPC: C08J9/22 ,  C08J9/224 ,  C08J9/232 ,  C08L25/04

Abstract: Particulate styrene polymers which contain a blowing agent and are surface-coated with from 0.05 to 1% by weight of an ester. The coating agent is a hydroxycarboxylic acid ester, or an ester of a carboxylic acid with an oxyalkylated alcohol; tristearyl citrate is a preferred ester. The styrene polymers can be used to produce foam moldings, with short mold dwell times and good welding of the foam particles.

公开(公告)号：DE3226995A1

公开(公告)日：1984-01-26

申请号：DE3226995

申请日：1982-07-20

Applicant: BASF AG

Inventor： TAUBITZ CHRISTOF DR ,  WALTER MANFRED DR

IPC: C08G75/16 ,  C07C149/30 ,  C07C148/00

Abstract: The invention relates to a process for the preparation of polyaryl sulphides having low fusion. To this end, a dihaloaromatic is reacted with an alkali metal sulphide in an amide or lactam as the solvent at temperatures between 190 and 300 DEG C in the presence of 0.03 to 1.5 mol of an alkali metal silicate per mol of alkali metal sulphide. Preferred alkali metal silicates are sodium metasilicate and potassium metasilicate in the form of their hydrates.

公开(公告)号：DE2501680A1

公开(公告)日：1976-07-22

申请号：DE2501680

申请日：1975-01-17

Applicant: BASF AG

Inventor： WALTER MANFRED DR ,  WIRTH HEINRICH DR ,  HINSELMANN KLAUS DIPL ING ,  SCHICK RUPERT DR ,  WEBER HEINZ DR ,  PENZIEN KLAUS DR

IPC: C08J9/00 ,  C08J9/16 ,  C08L25/04 ,  C08J9/22 ,  C08K5/02

Abstract: Finely divided expansible styrene polymer particles, for the prodn. of foram mouldings, contain 0.0001-0.2 phr of a nucleating agent (I) in non-homogeneous distribution, (I) being situated only in a thin band at the surface of the particles and virtually absent in the interior. Mouldings obtd. from the particles can be demoulded after a short dwell-time in the mould, have very low thermal conductivity (due to the coarse internal pore structure), have good dimensional stability (i.e. no lateral depression) and have homogeneous density.

公开(公告)号：DE2139686A1

公开(公告)日：1973-02-15

申请号：DE2139686

申请日：1971-08-07

Applicant: BASF AG

Inventor： WALTER MANFRED DR ,  WEBER HEINZ DR

IPC: C08J9/22 ,  C08J9/224 ,  C08G33/02

Abstract: 1396949 Coated expandable polymer particles BADISCHE ANILIN-& SODA-FABRIK AG 4 Aug 1972 [7 Aug 1971] 36498/72 Heading B2E [Also in Division C3] Coated particulate expandable styrene polymers are made by coating particles of the expandable polymer with 0.05-2% by wt. of the polymer, of a carboxamide or mixture thereof of m.p. 60-110‹C and of formula: RCONHR' where R is a C 7-21 alkyl or alkenyl group and R' is a C 8-22 alkyl or alkenyl group. In the examples beads or granulates of polystyrene containing pentane are coated with powdered stearic, behenic, myristic or oleic N- stearylamide, stearic N-oleylamide, stearic N-2- ethylhexylamide, or behenic or myristic N-laurylamide. The coated particles may be pre-expanded with steam, stored and then expanded in a mould with steam.

公开(公告)号：ES2103767T3

公开(公告)日：1997-10-01

申请号：ES91119807

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.