Dispersion of acrylate rubber and process for preparing it

• Main Authors: OTT, KARL-HEINZ, LINDNER, CHRISTIAN, LIEBIG, LOTHAR
• Format: Patent
• Language: English; French; German
• Published: 01.10.1980
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

Stabile, fließfähige Dispersionen von Kautschuken in Form diskreter Teilchen eines mittleren Durchmessers von 100 bis 3000 nm in organischen Flüssigkeiten, die enthalten: A- als Kautschuk 1 - 20 Gew.-%, bezogen auf Gesamtdispersion, eines vernetzten Homo- oder Copolymerisats eines C1-C10-Alkylacrylats; B-0-20 Gew.-%, bezogen auf Gesamtdispersion, Wasser in Form einer Wasser-in-Öl-Emulsion; C- als kontinuierliche organische Phase 99 - 60 Gew.-% bezogen auf Gesamtdispersion, a) C1-C10-Alkylacrylate oder Alkylmethacrylate, vorzugsweise Methylmethacrylate, Ethylacrylat oder n-Hexylacrylat, oder b) Gemisch aus 85 - 50 Gew.-% Styrol oder α-Methylstyrol und 15 - 50 Gew.-% Acrylnitril, Methacrylnitril oder C1-C6-Alkylacrylate oder Alkylmethacrylate, z.B. Methylmethacrylat, Ethylacrylat, n-Hexylacrylat, oder c) Gemisch aus 85 - 50 Gew.-% C1-C10-Alkylacrylat oder Alkylmethacrylate und 15 - 50 Gew.-%Acrylnitril, Methacrylnitril oder Styrol, wobei a), b) und c) bis zu 60 Gew.-% eines flüssigen Kohlenwasserstoffes zugemischt enthalten können, und ein Verfahren zu ihrer Herstellung. 1. Stable, flowable dispersions of rubbers in the form of discrete particles having an average diameter of 100 to 3 000 nm in organic liquids, which contain : A. as rubber, 1 to 20% by weight (based on the total weight of the dispersion) of a cross-linked homopolymer or copolymer of a C1 -C10 alkylacrylate ; B. 0 to 20% by weight (based on the total weight of the dispersion) of water in the form of a water-in-oil emulsion ; C. as continuous organic phase, 99 to 60% by weight (based on the total weight of the dispersion) of a) C1 -C10 alkylacrylates or alkylmethacrylates, preferably methylmethacrylate, ethylacrylate or n-hexylacrylate, or b) a mixture of 85 to 50% by weight of styrene or alpha-methylstyrene and 15 to 50% by weight of acrylonitrile, methacrylonitrile, or C1 -C6 alkylacrylates or alkylmethacrylates, or c) a mixture of 85 to 50% by weight of C1 -C10 alkylacrylate or alkylmethacrylate and 15 to 50% by weight of acrylonitrile, methacrylnitrile or styrene, wherein a), b) and c) can contain up to 60% by weight of a liquid hydrocarbon.