Process for producing formed product of deproteinized...

Details Process for producing formed product of deproteinized... Process for producing formed product of deproteinized...

C - Chemistry, Metallurgy

08

C

C08C 1/04 (2006.01) C08J 3/24 (2006.01) C08J 5/00 (2006.01) C08J 5/02 (2006.01) C11D 3/386 (2006.01) C12N 9/48 (2006.01)

Patent

CA 2214996

A method for producing a formed product of deproteinized natural rubber latex capable of reducing a content of an allergen in a natural rubber latex material to a level sufficient to keep the latex from being harmful to the human body without decreasing yields of the product and deteriorating formability of the latex. In the method, cleaning removal of a non-rubber content is carried out after each of protein decomposition, prevulcanization and forming. An aqueous alkali solution, ammonia, water containing free chlorine in an amount of 0.005 to 0.02 by weight or alcohol-water mixed liquid containing alcohol in an amount of to 80% by weight is used as cleaning liquid for the cleaning removal. The method is suitably applied to production of a natural rubber product such as a rubber glove, a condom, a catheter, a foam rubber material and the like.

Le procédé de préparation d'un latex d'élastomère-caoutchouc naturel déprotéinisé, dans lequel on abaisse la teneur en allergènes de ce produit dans certaines proportions de sorte qu'il ne nuise pas au corps humain, sans perte d'efficacité du produit et sans diminution de son aptitude au moulage. L'élimination par lavage des composants autres que le caoutchouc est prévue après chacune des trois étapes que sont la protéolyse, la prépolymérisation et le moulage au moyen d'une solution aqueuse d'alcalis, d'ammoniaque, d'eau contenant de 0,005 à 0,02 % en poids de chlore libre, ou un mélange eau-alcool ayant une teneur en alcool comprise entre 5 et 80 % en poids de la solution de lavage pour le traitement. Le procédé selon l'invention se prête à la préparation de produits en caoutchouc naturel tels que des gants en caoutchouc, des préservatifs, des cathéters, et des caoutchoucs-mousse, etc.

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