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    • 3. 发明专利
    • DE1620835C3
    • 1973-12-06
    • DE1620835
    • 1966-05-13
    • POLYMER CORP. LTD., SARNIA, ONTARIO (KANADA)
    • FISCHER, ERHARDTKENT, ERIC GEORGE
    • C08L9/00C08L23/12C08L93/00C08D9/12
    • The hardening rate of synthetic trans-1,4 polymers of isoprene having at least 85% of the units in the trans-1,4 configuration, or copolymers containing at least 80 mole per cent of such trans-1,4 polymers of isoprene is increased by dispersing therein a minor proportion by weight of a crystalline resin having a softening point above that of the trans-1,4 polymer. The trans-1,4 polymer may be a polyisoprene or copolymer of isoprene with less than 20 mole per cent of butadiene, piperylene, styrene, ethylene or propylene, and having at least 85% of isoprene units in the 1,4 configuration. The resin may be alban resin, shlllac, trans-1,4-polybutadiene, a butadiene/piperylene copolymer, trans-1,4-polypiperylene 1,2-polybutadiene or isotactic polypropylene. The compositions may be formed by milling or by mixing in solution to form a concentrate of the resin in a minor proportion of the polyisoprene. In examples, trans-1,4-polyisoprene is mixed with (I-IV) trans-1,4-polybutadiene, (V) a crystalline butadiene/piperylene copolymer, (VI) alban resin, (VII) shellac and (VIII) isotactic polypropylene.
    • 5. 发明专利
    • FR2178212A1
    • 1973-11-09
    • FR7311430
    • 1973-03-29
    • BAYER AG
    • C08F6/00C08C1/00C08C1/14C08J3/02C08C9/12C08D9/12
    • 1417275 Separating rubbers from aqueous dispersion BAYER AG 29 March 1973 [29 March 1972] 15264/73 Heading C3P Rubbers are recovered from aqueous dispersions by adding 0À1 to 15 wt. per cent (based on the rubber) of methyl cellulose to the dispersion, and removing the water from the resulting mixture. The last step may be achieved by adding water to the methyl cellulose/dispersion mixture until the rubber precipitates and then removing the water. The methylcellulose may be added in the form of a 0À1 to 10 wt. per cent solution. In the examples, aqueous dispersions of the following rubbery polymers are treated:- poly(butadiene/ acrylonitrile); poly(acrylonitrile/divinyl benzene/butadiene); poly(styrene/butadiene); poly- (chloroprene); poly(chloroprene / dichlorobutadiene); poly/butyl acrylate/acrylonitrile) and polyisoprene. Water is removed under agitation (e.g. stirring or milling) or spraydrying.
    • 6. 发明专利
    • DE1620835B2
    • 1973-05-17
    • DE1620835
    • 1966-05-13
    • C08L9/00C08L23/12C08L93/00C08D9/12
    • The hardening rate of synthetic trans-1,4 polymers of isoprene having at least 85% of the units in the trans-1,4 configuration, or copolymers containing at least 80 mole per cent of such trans-1,4 polymers of isoprene is increased by dispersing therein a minor proportion by weight of a crystalline resin having a softening point above that of the trans-1,4 polymer. The trans-1,4 polymer may be a polyisoprene or copolymer of isoprene with less than 20 mole per cent of butadiene, piperylene, styrene, ethylene or propylene, and having at least 85% of isoprene units in the 1,4 configuration. The resin may be alban resin, shlllac, trans-1,4-polybutadiene, a butadiene/piperylene copolymer, trans-1,4-polypiperylene 1,2-polybutadiene or isotactic polypropylene. The compositions may be formed by milling or by mixing in solution to form a concentrate of the resin in a minor proportion of the polyisoprene. In examples, trans-1,4-polyisoprene is mixed with (I-IV) trans-1,4-polybutadiene, (V) a crystalline butadiene/piperylene copolymer, (VI) alban resin, (VII) shellac and (VIII) isotactic polypropylene.
    • 7. 发明专利
    • FR2178212B1
    • 1977-04-29
    • FR7311430
    • 1973-03-29
    • BAYER AG
    • C08F6/00C08C1/00C08C1/14C08J3/02C08C9/12C08D9/12
    • 1417275 Separating rubbers from aqueous dispersion BAYER AG 29 March 1973 [29 March 1972] 15264/73 Heading C3P Rubbers are recovered from aqueous dispersions by adding 0À1 to 15 wt. per cent (based on the rubber) of methyl cellulose to the dispersion, and removing the water from the resulting mixture. The last step may be achieved by adding water to the methyl cellulose/dispersion mixture until the rubber precipitates and then removing the water. The methylcellulose may be added in the form of a 0À1 to 10 wt. per cent solution. In the examples, aqueous dispersions of the following rubbery polymers are treated:- poly(butadiene/ acrylonitrile); poly(acrylonitrile/divinyl benzene/butadiene); poly(styrene/butadiene); poly- (chloroprene); poly(chloroprene / dichlorobutadiene); poly/butyl acrylate/acrylonitrile) and polyisoprene. Water is removed under agitation (e.g. stirring or milling) or spraydrying.
    • 8. 发明专利
    • SE340884B
    • 1971-12-06
    • SE640166
    • 1966-05-10
    • POLYMER CORP
    • FISCHER EKENT E
    • C08L9/00C08L23/12C08L93/00C08D9/08C08D9/12C08F29/12
    • The hardening rate of synthetic trans-1,4 polymers of isoprene having at least 85% of the units in the trans-1,4 configuration, or copolymers containing at least 80 mole per cent of such trans-1,4 polymers of isoprene is increased by dispersing therein a minor proportion by weight of a crystalline resin having a softening point above that of the trans-1,4 polymer. The trans-1,4 polymer may be a polyisoprene or copolymer of isoprene with less than 20 mole per cent of butadiene, piperylene, styrene, ethylene or propylene, and having at least 85% of isoprene units in the 1,4 configuration. The resin may be alban resin, shlllac, trans-1,4-polybutadiene, a butadiene/piperylene copolymer, trans-1,4-polypiperylene 1,2-polybutadiene or isotactic polypropylene. The compositions may be formed by milling or by mixing in solution to form a concentrate of the resin in a minor proportion of the polyisoprene. In examples, trans-1,4-polyisoprene is mixed with (I-IV) trans-1,4-polybutadiene, (V) a crystalline butadiene/piperylene copolymer, (VI) alban resin, (VII) shellac and (VIII) isotactic polypropylene.