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http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-22
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filingDate 1992-02-21-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b04cf8f87cc325dfc9e6ba618b7500bf
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_893f85b2018c8c64b9178c09d4b7e41a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_682be733614fd04762b86fb81bb1463c
publicationDate 1992-09-09-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber EP-0502375-A1
titleOfInvention Multi-stage graft copolymer and its use for the preparation of transparent PVC-moulding compositions
abstract A) Emulsionspolymerisation von 5 bis 35 Gew.% eines Monomerengemischs ausn a₁) 60 - 80 Gew.% mindestens eines vinylaromatischen Monomeren a₂) 20 - 40 Gew.% mindestens eines ethylenisch ungesättigten Nitrils a₃) 0 - 10 Gew.% mindestens eines zwei- oder mehrfach ethylenisch ungesättigten Monomeren und B) anschließende Emulsionspolymerisation in Gegenwart des nach Stufe A) erhaltenen Emulsionspolymerisats von 20 - 45 Gew.% eines Monomerengemischs ausn b₁) 50 - 75 Gew.% mindestens eines vinylaromatischen Monomeren, b₂) 25 - 50 Gew.% mindestens eines C₁-C₁₈ Alkylacrylats b₃) 0 - 10 Gew.% mindestens eines zwei- oder mehrfach ethylenisch ungesättigten Monomeren und C) anschließende Emulsionspolymerisation in Gegenwart des nach Stufe B) erhaltenen Emulsionspolymerisats von 5 - 35 Gew.% eines Monomerengemisches ausn c₁) 60 - 80 Gew.% mindestens eines vinylaromatischen Monomeren, c₂) 20 - 40 Gew.% mindestens eines ethylenisch ungesättigten Nitrils, c₃) 0 - 10 Gew.% mindestens eines zwei- oder mehrfach ethylenisch ungesättigten Monomeren und D) anschließende Emulsionspolymerisation in Gegenwart des nach Stufe c) erhaltenen Emulsionspolymerisats von 15 - 45 Gew.% eines Monomerengemischs ausn d₁) 80 - 99,9 Gew.% mindestens eines C₁ - C₁₈-Alkylacrylats d₂) 0,1 - 10 Gew.% mindestens eines zwei- oder mehrfach ethylenisch ungesättigten Monomeren. The invention relates to graft copolymers obtainable by A) emulsion polymerization of 5 to 35% by weight of a monomer mixture a₁) 60-80% by weight of at least one vinyl aromatic monomer a₂) 20 - 40 wt.% At least one ethylenically unsaturated nitrile a₃) 0 - 10 wt.% At least one of two or more ethylenically unsaturated monomers and B) subsequent emulsion polymerization in the presence of the emulsion polymer obtained after step A) of 20-45% by weight of a monomer mixture b₁) 50-75% by weight of at least one vinyl aromatic monomer, b₂) 25 - 50 wt.% At least one C₁-C₁₈ alkyl acrylate b₃) 0 - 10 wt.% At least one of two or more ethylenically unsaturated monomers and C) subsequent emulsion polymerization in the presence of the emulsion polymer obtained after stage B) of 5-35% by weight of a monomer mixture c₁) 60-80% by weight of at least one vinyl aromatic monomer, c₂) 20-40% by weight of at least one ethylenically unsaturated nitrile, c₃) 0 - 10 wt.% At least one of two or more ethylenically unsaturated monomers and D) subsequent emulsion polymerization in the presence of the emulsion polymer obtained after step c) of 15-45% by weight of a monomer mixture d₁) 80 - 99.9% by weight of at least one C₁ - C₁₈ alkyl acrylate d₂) 0.1 - 10 wt.% At least one two or more ethylenically unsaturated monomers.
priorityDate 1991-03-05-04:00^^<http://www.w3.org/2001/XMLSchema#date>
type http://data.epo.org/linked-data/def/patent/Publication

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