Deproteinized natural rubber latex, method of preparing the...

Details Deproteinized natural rubber latex, method of preparing the... Deproteinized natural rubber latex, method of preparing the...

2007-02-06

2007-02-06

Mulcahy, Peter D. (Department: 1713)

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

C424S094600, C524S575500, C524S127000, C524S157000, C524S158000, C524S161000

Reexamination Certificate

active

11204162

ABSTRACT:
The present invention provides a deproteinized natural rubber latex wherein coagulation of a rubber component does not occur when the concentration of calcium ions (Ca2+) is 0.01 mol/L or less and coagulation of the rubber component occurs when the concentration of Ca2+is 0.1 mol/L or more; a method of preparing the deproteinized natural rubber latex, which comprises adding a protease and two or more surfactants having different coagulation properties to calcium ions (Ca2+) to a natural rubber latex and maturing the natural rubber latex; a rubber product using the deproteinized natural rubber latex; and a proteolytic agent comprising a protease and two or more surfactants. The deproteinized natural rubber latex is a latex wherein rubber molecules are dispersed and stabilized by a surfactant, and also have good film forming properties by means of the anode coagulation method and is less likely to cause uneven thickness of the film and liquid dripping even when a mold is dipped repeatedly in a latex on formation of a rubber film.

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X. Baur et al.,Allergy, vol. 52, (1997), pp. 661-664.

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