公开(公告)号：SE305079B

公开(公告)日：1968-10-14

申请号：SE900063

申请日：1963-08-16

Applicant: HOECHST AG

Inventor： HEUCK C ,  LEDERER M

IPC: C08F22/04 ,  C08F3/48

公开(公告)号：DK141849B

公开(公告)日：1980-06-30

申请号：DK91275

申请日：1975-03-06

Applicant: HOECHST AG

Inventor： LEDERER M ,  STROBEL W ,  JASTROW H

IPC: C08F255/00 ,  C08F255/04 ,  C08F255/06 ,  C08F283/12 ,  C08F291/00

Abstract: The invention relates to novel impact resistant graft copolymers of a vinyl aromatic on an ethylene/propylene/tercomponent rubber especially characterized by an improved notched impact strength and resistance to atmospheric corrosion, and a process for their preparation. Said copolymers are obtained by a two-step mass/suspension polymerization process characterized by the presence of oxygen, preferably by the presence of air, at a pressure of from 0.05 to 10 atmospheres gauge during the course of the mass polymerization step.

公开(公告)号：AU501289B2

公开(公告)日：1979-06-14

申请号：AU1681076

申请日：1976-08-12

Applicant: HOECHST AG

Inventor： LEDERER M ,  STROBEL W

IPC: C08F4/00 ,  C08F2/16 ,  C08F4/28 ,  C08F255/00 ,  C08F255/04 ,  C08F255/06

Abstract: There is disclosed an improved bulk-suspension process for polymerizing vinyl aromatic monomers in the presence of an ethylene-propylene-nonconjugated diene-rubber, which comprises using, in the suspension polymerization step, peroxy-carbonic esters as the polymerization initiator. The process of the invention yields products having improved notched impact strength, weatherability and elongation at break combined with a good shear stability.

公开(公告)号：SE368019B

公开(公告)日：1974-06-17

申请号：SE1460471

申请日：1971-11-15

Applicant: HOECHST AG

Inventor： JASTROW H ,  LEDERER M ,  HEISKEL E

IPC: C08F271/00 ,  C08F283/12 ,  C08J9/20 ,  C08F7/04

Abstract: 1334150 Preparation of foamable styrene polymer beads by suspension polymerization FARBWERKE HOECHST AG 15 Nov 1971 [16 Nov 1970] 52950/71 Headings C3P and C3C In a process for the production of foamable styrene polymer beads by suspension polymerizing styrene with or without up to 10% by weight of an alkyl styrene or nuclear halogenated styrene or up to 10% by weight of an acrylic or methacrylic acid ester, acrylonitrile, vinyl chloride, a vinyl ester or a vinyl polysiloxane, in the presence of a blowing agent, the protective colloid for the suspension is 0À02-0À08% by wt. based on the total monomer, of a copolymer of 98-99À5% by wt. of an N-vinyl-N- alkyl acetamide in which the alkyl is C 1-4 , and from 2-0À5% by wt. of a C 6-18 aliphaticalcohol ester of acrylic, methacrylic, maleic, or fumaric acid, said copolymer having a Fickentscher K value of 70-120, measured as a 1% methanol solution at 20‹ C. The preferred protective colloid is a copolymer of N-vinyl-N- methyl acetamide and 2-ethylhexyl acrylate. Other suitable comonomers for the N-vinyl-N- alkylacetamide are n-hexyl acrylate, decyl methacrylate, dodecyl maleate and stearyl fumarate. Blowing agents specified are npentane, isopentane, cyclopentane, hexane, petroleum ether, and halogenated hydrocarbons such as CFCl 3 , CF 2 Cl 2 , CH 3 Cl, and CH 2 Cl 2 . Nucleating agents for pore regulation may also be present, such as hexabromocyclododecane, tetrabromobutane, tris(dibromopropylphosphate), brominated butadiene oligomers and chlorine compounds such as chloro-paraffins and P.V.C., and polysiloxanes. The initiators used are conventional. Other additives such as flame retarders, plasticizers &c. may also be present. The blowing agent may be added before or during polymerization.

公开(公告)号：SE316472B

公开(公告)日：1969-10-27

申请号：SE668565

申请日：1965-05-21

Applicant: HOECHST AG

Inventor： EBNER H ,  LEDERER M ,  KASTEN K

IPC: C07C409/34 ,  C07C73/10

Abstract: Peroxydicarbonates of the general formula R-O-CO-O-O-CO-O-R in which R is an alkyl, chloroalkyl or alkenyl group of 1-9 carbon atoms are prepared in a continuous process by reacting a chloroformic acid ester of the general formula R-O-CO-Cl with H2O2 and an acqueous solution of an alkali metal hydroxide at -10 DEG to 30 DEG C., wherein the major part of the reaction is effected in a first reaction zone at a pH of 8-14 with intimate mixing, the dispersion obtained is transferred to an after-reaction zone in which the reaction proceeds to completion and the peroxydicarbonate obtained is taken up in a hydrogen-free, halogen-containing solvent or a hydrocarbon or terpene that is liquid under normal conditions.