Extrudable self-adhering elastic and method of employing same

Claim 1

A method for imparting elastic properties to a flexible substrate, which comprises contacting a surface of the flexible substrate with a band of a self-adhering elastic composition which consists essentially of: (a) a block copolymer comprising at least one substantially amorphous, rubbery polymeric midblock and at least was glassy poly(vinylarene) end blocks; (b) about 20 to 150 parts by weight of a midblock associating resin; and (c) about 10 to 50 parts by weight of an endlock associating resin having a glass transition temperature and a softening point above about 115° C. each per 100 parts of the block copolymer; wherein the proportions of components (a), (b), and (c) are selected to provide the following properties: (i) a tensile strength at 500% elongation, determined at 20°-25° C., of at least 50 pounds per square inch; (ii) a 180° peel resistance, according to PSTC-1, determined at 20°-25° C. 24 hours after formation of the pressure-sensitive adhesive bond, of at least about 450 grams per 25.4 mm-width; (iii) a dead load deformation, tested at 37.8° C. and 1500 g/cm 2 , less than 50%; and (iv) a loss modulus of 5×10 4 to 100×10 4 dynes/cm 2 , a storage modulus of 65×10 4 to 225×10 4 dynes/cm 2 , and a loss tangent of 0.03 to 1.0, at 0.01-0.25 Hz at 25°-50° C.

Claim 2

A method for imparting elastic properties to a flexible substrate, which comprises contacting a surface of the flexible substrate with a band of a self-adhering elastic composition which consists essentially of: (a) a block copolymer comprising at least one substantially amorphous, rubbery polymeric midblock and at least was glassy poly(vinylarene) end blocks; (b) about 20 to 150 parts by weight of a midblock associating resin; and (c) about 10 to 50 parts by weight of an endlock associating resin having a glass transition temperature and a softening point above about 115° C. each per 100 parts of the block copolymer; wherein the proportions of components (a), (b), and (c) are selected to provide the following properties: (i) a tensile strength at 500% elongation, determined at 20°-25° C., of at least 50 pounds per square inch; (ii) a 180° peel resistance, according to PSTC-1, determined at 20°-25° C. 24 hours after formation of the pressure-sensitive adhesive bond, of at least about 450 grams per 25.4 mm-width; (iii) a dead load deformation, tested at 37.8° C. and 1500 g/cm 2 , less than 50%; and (iv) a loss modulus of 5×10 4 to 100×10 4 dynes/cm 2 , a storage modulus of 65×10 4 to 225×10 4 dynes/cm 2 , and a loss tangent of 0.03 to 1.0, at 0.01-0.25 Hz at 25°-50° C.

Claim 14

The method for imparting a self-adhering elastic to a flexible substrate comprising the steps of: (a) unreeling a band of self-adhering elastic composition from a roll, said roll being maintained at a temperature below the softening point of said self-adhering elastic and said band of self-adhering elastic being an extrudate at least 50 microns in thickness which consists essentially of a block copolymer comprising at least one substantially amorphous, rubbery polymeric midblock and at least two glassy poly(vinylarene) end blocks; (ii) 20-150 parts per hundred of a midblock associating resin; and (iii) 10-150 parts per hundred of an aromatic, essentially hydrocarbon endblock associating resin having a Tg and a softening point above 115° C. each per one hundred parts of the block copolymer; wherein the proportions (i), (ii), and (iii) are selected to provide the following properties: (i) a tensile strength at 500% elongation, determined at 20°-25° C., of at least 50 pounds per square inch; (ii) at 180° peel resistance, according to PSTC-1, determined at 20°-25° C. 24 hours after formation of the pressure-sensitive adhesive bond, of at least about 450 grams per 25.4 mm-width; (iii) a dead load deformation, tested at 37.8° C. and 1500 g/cm 2 , less than 50%; and (iv) a loss modulus of 5×10 4 to 100×10 4 dynes/cm 2 , a storage modulus of 65×10 4 to 225×10 4 dynes/cm 2 , and a loss tangent of 0.03 to 1.0, at 0.01-0.25 Hz at 25°-50° C. (b) contacting the band of self-adhering elastic with a surface of a flexible substrate forming a bond between the substrate and elastic.

Claim 15

The method for imparting a self-adhering elastic to a flexible substrate comprising the steps of: (a) unreeling a band of self-adhering elastic composition from a roll, said roll being maintained at a temperature below the softening point of said self-adhering elastic and said band of self-adhering elastic being an extrudate at least 50 microns in thickness which consists essentially of a block copolymer comprising at least one substantially amorphous, rubbery polymeric midblock and at least two glassy poly(vinylarene) end blocks; (ii) 20-150 parts per hundred of a midblock associating resin; and (iii) 10-150 parts per hundred of an aromatic, essentially hydrocarbon endblock associating resin having a Tg and a softening point above 115° C. each per one hundred parts of the block copolymer; wherein the proportions (i), (ii), and (iii) are selected to provide the following properties: (i) a tensile strength at 500% elongation, determined at 20°-25° C., of at least 50 pounds per square inch; (ii) at 180° peel resistance, according to PSTC-1, determined at 20°-25° C. 24 hours after formation of the pressure-sensitive adhesive bond, of at least about 450 grams per 25.4 mm-width; (iii) a dead load deformation, tested at 37.8° C. and 1500 g/cm 2 , less than 50%; and (iv) a loss modulus of 5×10 4 to 100×10 4 dynes/cm 2 , a storage modulus of 65×10 4 to 225×10 4 dynes/cm 2 , and a loss tangent of 0.03 to 1.0, at 0.01-0.25 Hz at 25°-50° C. (b) contacting the band of self-adhering elastic with a surface of a flexible substrate forming a bond between the substrate and elastic.