Solventless compounding and coating of non-thermoplastic...

Details Solventless compounding and coating of non-thermoplastic... Solventless compounding and coating of non-thermoplastic...

C - Chemistry, Metallurgy

08

J

C08J 9/228 (2006.01) C08J 9/06 (2006.01) C08J 9/22 (2006.01) C09J 5/08 (2006.01) C08L 21/00 (2006.01)

Patent

CA 2184702

A solvent-free hot melt process, for preparing a foamed, non-thermosettable, pressure-sensitive adhesive from a tackified non- thermoplastic hydrocarbon elastomer. The process employs a continuous compounding device (20) that has a sequence of alternating conveying and processing zones. The processing zones masticate and mix materials in them. Non-thermoplastic elastomers having high molecular weight may be readily compounded into adhesives in the process.

L'invention concerne un procédé de préparation par fusion à chaud et sans solvant d'un adhésif autocollant expansé et non thermodurcissable, à partir d'un élastomère hydrocarboné non thermoplastique additionné d'un agent collant. Le procédé fait appel à un malaxeur (20) fonctionnant en continu comprenant une succession de zones de transport alternant avec des zones de transformation. Les zones de transformation mastiquent et mélangent les ingrédients. Les élastomères non thermoplastiques ayant un poids moléculaire élevé peuvent facilement être malaxés pour donner des adhésifs.

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