C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 11/02 (2006.01) C08J 3/07 (2006.01) C08J 3/20 (2006.01) C08L 9/04 (2006.01) C08L 9/08 (2006.01) C08L 9/10 (2006.01)
Patent
CA 2716805
An aqueous elastomer dispersion includes a dispersed phase and an aqueous phase. The dispersed phase includes an elastomer including curable aliphatic conjugated- diene elastomers, such as polyisoprene, and a minor amount of at least one additive. The aqueous phase includes water and other optional components in either a soluble state or a dispersion state. The aqueous elastomer dispersion may be prepared by dissolving an elastomer, such as rubber, and additives in a solvent mixture and then converting the resulting solution into an aqueous emulsion. The aqueous emulsion is concentrated and the solvent is stripped from it to yield a dilute latex. The dilute latex that is obtained is concentrated again. Articles made from the aqueous elastomer dispersion include medical gloves, condoms, probe covers, dental dams, finger cots, catheters and the like.
Linvention concerne une dispersion élastomère aqueuse qui inclut une phase dispersée et une phase aqueuse. La phase dispersée inclut un élastomère qui comprend des élastomères diènes conjugués aliphatiques durcissables, tels que le polyisoprène, et une quantité mineure dau moins un additif. La phase aqueuse inclut de leau et dautres composants optionnels à létat soluble ou dispersé. La dispersion élastomère aqueuse peut être préparée en dissolvant un élastomère, tel que le caoutchouc, et des additifs dans un mélange de solvants, puis en transformant la solution résultante en une émulsion aqueuse. Lémulsion aqueuse est concentrée et le solvant en est extrait pour obtenir un latex dilué. Le latex dilué obtenu est de nouveau concentré. Les articles fabriqués à partir de la dispersion élastomère aqueuse incluent les gants médicaux, les préservatifs, les revêtements de sonde, les digues dentaires, les doigtiers, les cathéters et analogues.
Berger Ida
Chen Seong Fong
Wang Shiping
Wong Wei Cheong
Yeh Yun-Siung Tony
Allegiance Corporation
Gowling Lafleur Henderson Llp
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