Pressure sensitive adhesive

Details Pressure sensitive adhesive Pressure sensitive adhesive

C - Chemistry, Metallurgy

09

J

C09J 133/08 (2006.01) C09J 7/00 (2006.01) C09J 7/02 (2006.01) C09J 11/02 (2006.01) C09J 151/00 (2006.01)

Patent

CA 2214630

The present invention relates to a removable and/or reactivatable, transparent pressure sensitive adhesive obtainable by polymerizing a precursor comprising a monomer component which contains one or more alkyl acrylates, the alkyl groups of which have an average of 4-14C atoms, and which is essentially free from polar comonomers, said precursor further comprising at least about 2.0 phr of hydrophobic silica, one or more polymerization initiators and one or more crosslinker compounds in a concentration resulting in a crosslink density obtainable by using tripropyleneglycoldiacrylate as a reference crosslinker compound in a concentration of 0.15 phr or more.

L'invention porte sur un adhésif autocollant transparent, enlevable et (ou) réutilisable, obtenu par polymérisation d'un précurseur à base d'un monomère renfermant un ou plusieurs acrylates d'alkyle - le groupe alkyle comptant en moyenne de 4 à 14 atomes de carbone - et pratiquement exempt de comonomères polaires; le précurseur renferme au moins 2,0 phr de silice hydrophobe, un ou plusieurs initiateurs de polymérisation et un ou plusieurs agents de réticulation à une concentration donnant une densité de réticulation, déterminée à l'aide de tripropylèneglycoldiacrylate comme agent réticulant de référence, à une concentration de 0,15 phr ou plus.

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