Wet surface adhesives
Assignee3M Innovative Properties Company
InventorsMichael P. Daniels, Yen-Lane Chen, Albert I. Everaerts, Stephen E. Krampe, James K. Young
Life of this patent
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Abstract
A wet stick pressure sensitive adhesive comprising the solventless polymerization product of: a) about 30 to about 70 parts by weight of an (meth)acrylate ester monomer wherein the (meth)acrylate ester monomer, when homopolymerized, has a Tg of less than about 10° C.; b) about 70 to about 30 parts by weight of a hydrophilic acidic comonomer; and c) about 10 to 100 parts based on 100 parts of the sum of components (a+b) of a non-reactive plasticizing agent, wherein the pressure sensitive adhesive adheres to wet substrate surfaces and a method of making.
Claims24
A hot melt pressure sensitive adhesive comprising a 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 pressure sensitive adhesive, wherein said pressure sensitive adhesive comprises the polymerization product of:
- (a) about 30 to about 70 parts by weight of an (meth)acrylate ester monomer wherein the (meth)acrylate ester monomer, when homopolymerized, has a Tg of less than about 10° C.;
- (b) about 70 to about 30 parts by weight of a hydrophilic acidic comonomer;
- and
- (c) about 10 to 100 parts based on 100 parts (a)+(b) of a non-reactive plasticizing agent,
- wherein the pressure sensitive adhesive adheres to wet substrate surfaces.
A method for preparing a hot melt pressure sensitive adhesive comprising the steps of:
- (a) combining a solventless polymerizable mixture comprising:
- (i) about 30 to about 70 parts by weight of an (meth)acrylate ester wherein the (meth)acrylate ester, when homopolymerized, has a Tg of less than about 10° C.;
- (ii) about 70 to about 30 parts by weight of a hydrophilic acidic comonomer;
- and
- (iii) about 10 to 100 parts based on 100 parts of the sum of components (i) and (ii) of a non-volatile, non-reactive plasticizing agent;
- (b) enveloping the polymerizable mixture in a thermoplastic packaging material;
- (c) polymerizing the solventless polymerizable mixture to form the pressure sensitive adhesive that adheres to wet substrate surfaces, said 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.
A method for preparing a hot melt pressure sensitive adhesive comprising the steps of:
- (a) combining a solventless polymerizable mixture comprising:
- (i) about 30 to about 70 parts by weight of an (meth)acrylate ester wherein the (meth)acrylate ester, when homopolymerized, has a Tg of less than about 10° C.;
- (ii) about 70 to about 30 parts by weight of a hydrophilic acidic comonomer;
- and
- (iii) about 10 to 100 parts based on 100 parts of the sum of components (i) and (ii) of a non volatile, non-reactive plasticizing agent;
- (b) enveloping the polymerizable mixture in a thermoplastic packaging material;
- (c) exposing the enveloped polymerizable mixture to sufficient radiation to polymerize the polymerizable mixture and to form the pressure sensitive adhesive that adheres to wet substrate surfaces, said 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.
A method for preparing a wet stick pressure sensitive adhesive comprising the steps of:
- (a) preparing a prepolymeric syrup comprising:
- (i) about 30 to about 70 parts by weight of an (meth)acrylate ester wherein the (meth)acrylate ester, when homopolymerized, has a Tg of less than about 10° C.;
- and
- (ii) about 70 to about 30 parts by weight of a hydrophilic acidic comonomer;
- (b) combining the prepolymeric syrup with about 10 to 100 parts based on 100 parts of the sum of components (i)+(ii) of a non-reactive plasticizing agent to form a polymerizable mixture;
- (c) enveloping the polymerizable mixture in a thermoplastic packaging material;
- (d) exposing the enveloped polymerizable mixture to sufficient radiation to polymerize the polymerizable mixture and to form the pressure sensitive adhesive that adheres to wet substrate surfaces.
An article comprising:
- 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 comprising
- (a) about 30 to about 70 parts by weight of an (meth)acrylate ester monomer wherein the (meth)acrylate ester monomer, when homopolymerized, has a Tg of less than about 10° C.;
- (b) about 70 to about 30 parts by weight of a hydrophilic acidic comonomer;
- and
- (c) about 10 to 100 parts based on 100 parts (a)+(b) of a non-reactive plasticizing agent.
Dependencies are inferred from the claim text.