초록 ▼

The present invention provides a pressure-sensitive adhesive composition and tape prepared therefrom which has excellent ability to adhere to acidic surfaces such as acid-rain resistant automotive paints. The adhesive comprises a crosslinked copolymer comprising certain (meth)acrylate esters, certai

The present invention provides a pressure-sensitive adhesive composition and tape prepared therefrom which has excellent ability to adhere to acidic surfaces such as acid-rain resistant automotive paints. The adhesive comprises a crosslinked copolymer comprising certain (meth)acrylate esters, certain nitrogen containing basic monomers copolymerizable therewith, optional copolymerizable acidic monomer, and crosslinker.

대표청구항 ▼

A pressure-sensitive adhesive consisting essentially of: a crosslinked copolymer of 100 parts by weight of monomer of elements (a), (b), and (c) wherein the copolymer comprises (a) about 60 to about 90 parts by weight of at least one monomer selected from the group consisting of monofunctional unsat

A pressure-sensitive adhesive consisting essentially of: a crosslinked copolymer of 100 parts by weight of monomer of elements (a), (b), and (c) wherein the copolymer comprises (a) about 60 to about 90 parts by weight of at least one monomer selected from the group consisting of monofunctional unsaturated (meth)acrylate esters of non-tertiary alkyl alcohols, and mixtures thereof, the alkyl groups of which comprise from about 4 to about 12 carbon atoms which as homopolymers have glass transition temperatures below about -20°C.; (b) correspondingly, about 40 to about 10 parts by weight of a basic copolymerizable monomer having the formula [Figure] Formula (I) wherein a represents an integer of 0 to 1; b represents an integer of 1; R is selected from the group consisting of H－and CH3－; X is selected from the group consisting of －O－and －NH－; Y is a divalent linking group comprising 1 to 5 carbon atoms; Z is a non-sterically hindered group [Figure] wherein R1 is selected from the group consisting of an electron donating group and a radical which completes a ring structure including Y to form a heterocycle; R2 is Selected from the group consisting of an electron donating group and a radical which completes a ring structure including Y to form a heterocycle, wherein R1 and R2 cannot simultaneously represent a radical which completes a ring structure including Y to form a heterocycle; (c) about 0 to about 3 parts by weight an acidic monomer copolymerizable with the monomers of elements (a) and (b) wherein when the acidic monomer is included, the basic copolymerizable monomer should be present in a molar excess; (d) about 0.05 to about 1 percent by weight of a crosslinking agent, based upon the total weight of (a) plus (b) plus (c); and (e) optionally a material selected from the group consisting of fillers, pigments, woven fabrics, nonwoven fabrics, foaming agents, antioxidants, stabilizers, fire retardants, viscosity adjusting agents, and solvents; wherein the pressure-sensitive adhesive has a basic character and wherein the pressure sensitive-adhesive has the ability to permanently bond to solid acidic surfaces.