Wet and dry surface adhesives
Assignee3M Innovative Properties Company
InventorsShinobu Sato, Shimpei Kudo, Gregg A. Patnode
Life of this patent
Estimating the term…
Abstract
A pressure sensitive adhesive comprising the polymerization product of a reaction mixture comprising: (a1) one or more (meth)acrylate ester monomers; (a2) one or more hydrophilic monomers; and (b) non-reactive, ionic surfactant. Also, articles comprising such adhesives and methods for making such adhesives and such articles.
Claims15
A pressure sensitive adhesive comprising the reaction product of a reaction mixture comprising:
- (a) polymerizable components (a1) one or more (meth)acrylate ester monomers that when polymerized in the absence of other comonomers yield a polymer or copolymer having a Tg of less than about 10° C.;
- and (a2) one or more hydrophilic non-acidic comonomers or one or more hydrophilic acidic comonomers;
- (b) one or more non-reactive, ionic surfactants;
- wherein the one or more (meth)acrylate ester monomers and the one or more hydrophilic comonomers are present in a weight ratio of about 1:1 to about 1.5:1 and the surfactant is present at about 10 wt % to about 30 wt %, based on total weight of the surfactant plus (a1) (meth)acrylate ester monomers and (a2) hydrophilic comonomers.
A hot melt pressure sensitive adhesive comprises a wet-stick pressure sensitive adhesive having a flow temperature and a thermoplastic packaging material enveloping said wet-stick pressure sensitive adhesive, said thermoplastic packaging material having a melting temperature lower than the flow temperature of the wet-stick pressure sensitive adhesive, wherein said pressure sensitive adhesive comprises the reaction product of a reaction mixture comprising (a) polymerizable components (a1) one or more (meth)acrylate ester monomers that when polymerized in the absence of other comonomers, yield a polymer or copolymer having a Tg of less than about 10° C.;
- and (a2) one or more hydrophilic non-acidic comonomers or one or more hydrophilic acidic comonomers;
- and (b) one or more non-reactive, ionic surfactants;
- wherein the one or more (meth)acrylate ester monomers and the one or more hydrophilic comonomers are present in a weight ratio of about 1:1 to about 1.5:1 and the surfactant is present at about 10 wt % to about 30 wt %, based on total weight of the surfactant plus (a1) (meth)acrylate ester monomers and (a2) hydrophilic comonomers.
An article a substrate;
- and a hot melt pressure sensitive adhesive applied to a surface of said substrate, said hot melt adhesive comprising a mixture of a pressure sensitive adhesive having a flow temperature and a thermoplastic material having a melting temperature that is less than the flow temperature of the pressure sensitive adhesive, said pressure sensitive adhesive the reaction product of a reaction mixture comprising (a) polymerizable components (a1) one or more (meth)acrylate ester monomers that when polymerized in the absence of other comonomers, yield a polymer or copolymer having a Tg of less than about 10° C.;
- and (a2) one or more hydrophilic non-acidic comonomers or one or more hydrophilic acidic comonomers;
- and (b) one or more non-reactive, ionic surfactants;
- wherein the one or more (meth)acrylate ester monomers and the one or more hydrophilic comonomers are present in a weight ratio of about 1:1 to about 1.5:1 and the surfactant is present at about 10 wt % to about 30 wt %, based on total weight of the surfactant plus (a1) (meth)acrylate ester monomers and (a2) hydrophilic comonomers.
A method for preparing a pressure sensitive adhesive comprising the steps of:
- (1) preparing a solventless reaction mixture comprising (a) polymerizable components (a1) one or more (meth)acrylate ester monomers that when polymerized in the absence of other comonomers yield a polymer or copolymer having a Tg of less than about 10° C.;
- and (a2) one or more hydrophilic non-acidic comonomers or one or more hydrophilic acidic comonomers;
- and (b) one or more non-reactive, ionic surfactants,
- wherein the one or more (meth)acrylate ester monomers and the one or more hydrophilic comonomers are present in a weight ratio of about 1:1 to about 1.5:1 and the surfactant is present at about 10 wt % to about 30 wt %, based on total weight of the surfactant plus (a1) (meth)acrylate ester monomers and (a2) hydrophilic comonomers;
- and
- (2) reacting the reaction mixture to polymerize the polymerizable components to yield the pressure sensitive adhesive.
A method for preparing a hot melt pressure sensitive adhesive comprising the steps of:
- (1) preparing a solventless reaction mixture comprising (a) polymerizable components (a1) one or more (meth)acrylate ester monomers that when polymerized in the absence of other comonomers yield a polymer or copolymer having a Tg of less than about 10° C.;
- and (a2) one or more hydrophilic non-acidic comonomers or one or more hydrophilic acidic comonomers;
- and (b) one or more non-reactive, ionic surfactants,
- wherein the one or more (meth)acrylate ester monomers and the one or more hydrophilic comonomers are present in a weight ratio of about 1:1 to about 1.5:1 and the surfactant is present at about 10 wt % to about 30 wt %, based on total weight of the surfactant plus (a1) (meth)acrylate ester monomers and (a2) hydrophilic comonomers;
- (2) enveloping the polymerizable composition in a thermoplastic packaging material;
- and
- (3) exposing the enveloped polymerizable composition to radiation in an amount sufficient to polymerize the polymerizable components and to form the pressure sensitive adhesive having a flow temperature,
- wherein the thermoplastic packaging material has a melting temperature lower than the flow temperature of the pressure sensitive adhesive.
Dependencies are inferred from the claim text.