公开(公告)号：DE19710442A1

公开(公告)日：1998-09-17

申请号：DE19710442

申请日：1997-03-13

Applicant: BASF AG

Inventor： GLUECK GUISCARD DR ,  HAHN KLAUS DR ,  HENN ROLF DR ,  WASMER KARL-HEINZ DR ,  LOTH WOLFGANG DR ,  KNOLL KONRAD DR ,  HOLOCH JAN DR ,  GEIGER THOMAS

IPC: C08J9/00 ,  C08J9/14 ,  C08L25/06 ,  C08L53/02 ,  C08L25/10 ,  B29C47/00 ,  C08J9/18 ,  E04B1/74 ,  F16L59/00

Abstract: An expandable styrene polymer (I) contains: (A) a polymer matrix consisting of 70-95 wt.% polystyrene or a styrene copolymer containing up to 50% comonomers and 5-30 wt.% of a styrene-butadiene block copolymer; (B) 1-15 wt.% (with respect to (A)) of a volatile blowing agent; and optionally (C) conventional additives. The block copolymer structure: S-B/S(-S)n, in which S = polystyrene block; B/S = butadiene/styrene copolymer block with a statistical distribution of monomers; and n = 0 or 1, with S blocks comprising 5-40 vol. %. Also claimed are: (i) a process for the preparation of (I) by the addition of (B) during or after mixing of (A); and (ii) an elastomeric foam having density 5-150g/cm , which is prepared from (I).

公开(公告)号：DE19716572A1

公开(公告)日：1998-10-22

申请号：DE19716572

申请日：1997-04-19

Applicant: BASF AG

Inventor： GLUECK GUISCARD DR ,  HAHN KLAUS DR ,  HENN ROLF DR ,  WASMER KARL-HEINZ DR ,  GAUSEPOHL HERMANN DR ,  KNOLL KONRAD DR ,  BATSCHEIDER KARL-HEINZ

IPC: C08J9/14 ,  C08F287/00 ,  C08J9/16 ,  C08L25/06 ,  C08L51/04 ,  C08L53/02

Abstract: An expandable rubber modified styrene polymer (I) comprises (A) a continuous phase of polystyrene or a styrene comonomer containing up to 50 wt.% comonomer (B) 5-30 wt.% (w.r.t. polymer mixture) of dispersed rubber particles and (C) 2-15 pts.wt. (w.r.t. 100 pts wt. polymer mixture) of a low binding blowing agent. The rubber particles consists of a butadiene/styrene block copolymer having a compact lamella structure without polystyrene inclusions. Also claimed are: (i) a process for the production of (I) by dissolving (B) in (A) followed by polymerisation of the monomers and processing to a granular form whereby (C) is added during or after polymerisation. (ii) pre-foamed beads having pore walls made of (I).

公开(公告)号：DE4416852A1

公开(公告)日：1995-11-16

申请号：DE4416852

申请日：1994-05-13

Applicant: BASF AG

Inventor： HENN ROLF DR ,  HAHN KLAUS DR ,  HOENL HANS DR ,  HECKMANN WALTER DR ,  WASMER KARL-HEINZ DR ,  KLEMENT ERICH ,  FISCHER JOACHIM DR

IPC: C08J9/18 ,  C08L23/00 ,  C08L25/04 ,  C08L53/00 ,  C08L21/00 ,  C08L23/02 ,  C08J9/12 ,  C08J9/232 ,  B29C67/20

Abstract: Expandable styrene polymers (I) for elastic polystyrene foam contain (a) 50-75 wt.% polystyrene and/or a copolymer with at least 50 wt.% polystyrene, (b) 5-30 wt.% styrene-soluble elastomer(s), (c) 5-20 wt.% block copolymer(s) with a styrene component, (d) 15-50 wt.% polyolefin(s), (e) 1-15 wt.%, w.r.t. (a)+(b), of a low-boiling blowing agent and opt. (f) usual additives in effective amts. Also claimed are a method for producing (I); elastic foam with a density of 5-70 g/l prepd. from (I); and a method of producing mouldings from (I). Pref. (b) has a Tg below 20 degrees C and esp. is polybutadiene. (c) contains at least 20 wt.% styrene and is a styrene-butadiene (SB) block copolymer, esp. a SB diblock copolymer and/or SBS triblock copolymer. (d) is polyethylene, opt. mixed with polypropylene.

公开(公告)号：DE19544487A1

公开(公告)日：1997-06-05

申请号：DE19544487

申请日：1995-11-29

Applicant: BASF AG

Inventor： WALTER MANFRED DR ,  KNOLL KONRAD DR ,  SCHNEIDER MICHAEL DR ,  WASMER KARL-HEINZ DR

IPC: C08J9/16 ,  C08F212/08 ,  C08F212/32 ,  C08J9/18 ,  C08J9/228 ,  C09K21/14 ,  C08L25/08 ,  C08L25/02 ,  B29C67/20

Abstract: The foam is based on a copolymer (I) of styrene with 2-50 mole-% 1,1-diphenylethene (II). Also claimed are methods for making the foam in various forms. The beads are produced by impregnating (I) granulate having an average diameter of 0.1-3 mm with a volatile blowing agent in aqueous suspension at 100-180 degrees C and then either (a) cooling the suspension, separating the granulate and foaming by supplying energy in a separate stage or (b) depressurising the hot suspension and hence foaming the granulate directly. Mouldings are made by from the prefoamed beads by foaming and welding in a mould. Boards and sheets are made by plasticising (I) in an extruder, mixing with a volatile blowing agent and extrusion through a wide slit die, with foaming.

公开(公告)号：DE19530548A1

公开(公告)日：1997-02-20

申请号：DE19530548

申请日：1995-08-19

Applicant: BASF AG

Inventor： STEINBRECHER HORST ,  SCHERZER DIETRICH DR ,  HAHN KLAUS DR ,  WASMER KARL-HEINZ DR ,  NAEGELE DIETER DR

IPC: C08F2/18 ,  C08J9/18 ,  C08J9/224 ,  C08L25/04 ,  C08F12/08 ,  C08K3/34 ,  C08K5/01 ,  C08K5/098 ,  C08K5/103

Abstract: - Expandable polystyrene bead polymer is obtd. in the usual way by suspension polymerisation of styrene and opt. comonomers with olefinic double bonds, then worked up, dried and coated. The novelty is that the coating agent contains 10-90 wt.% coconut oil or paraffin oil w.r.t. the coating. Also claimed is the coating agent per se and foam made from polystyrene beads with a coating contg. 10-90 wt.% coconut oil or paraffin oil and 5-20 wt.% hydrophobic silicate.

公开(公告)号：DE4416861A1

公开(公告)日：1995-11-16

申请号：DE4416861

申请日：1994-05-13

Applicant: BASF AG

Inventor： HENN ROLF DR ,  HAHN KLAUS DR ,  LOTH WOLFGANG DR ,  HECKMANN WALTER DR ,  BLUMENSTEIN UWE DR ,  SCHWABEN HANS-DIETER DR ,  WASMER KARL-HEINZ DR ,  TATZEL HERMANN

IPC: C08J9/16 ,  C08J9/18 ,  C08J9/232 ,  C08L7/00 ,  C08L25/04 ,  C08L21/00 ,  C08J9/12 ,  B29C67/20

Abstract: Expandable styrene polymers (I) for elastic polystyrene foam contain (a) 75-98 wt.% polystyrene and/or styrene copolymer contg. at least 50% polystyrene, (b) 2-25 wt.% styrene-soluble elastomer(s), (c) 1-15 wt.% w.r.t. (a)+(b), of low-boiling blowing agent(s) and opt. (d) usual additives in effective amts. The unfoamed beads have a structure in which the elastomer phase is dispersed in the polystyrene phase in the form of cell particles. Also claimed are a method of producing (I), elastic foam with a density of 5-70 g/l, prepd. from (I), and a method of making mouldings from (I). Pref. (I) contains 95-93 wt.% (a) and 7-15 wt.% (b). (b) has Tg below 20 degrees C and esp. is polybutadiene. The cell particles have a dia. of 0.1-10, esp. 0.5-5 microns.