Sheet material coated with heat hardenable tacky adhesive

Claim 2

from about 25 to 250 parts by weight of an elastomeric butadiene:acrylonitrile copolymer containing 18-45 percent acrylonitrile, the balance being butadiene and

Claim 3

from about 25 to 250 parts by weight of an elastomeric butadiene:acrylonitrile copolymer containing 18-45 percent acrylonitrile, the balance being butadiene and

Claim 4

from about 25 to 250 parts by weight of an elastomeric butadiene:acrylonitrile copolymer containing 18-45 percent acrylonitrile, the balance being butadiene and

Claim 5

from about 25 to 250 parts by weight of an elastomeric butadiene:acrylonitrile copolymer containing 18-45 percent acryloNitrile, the balance being butadiene and

Claim 6

an effective amount of a dual curing system which is substantially inactive at room temperature and which contains about 1-5 percent, based on the total weight of the blend, of a peroxide curing agent for the unsaturated groups and at least a stoichiometric amount of an epoxy group curing agent, said constituents being present in amounts such as to render said blend when formed per se in a 75 micron layer, tacky, flexible and self-sustaining, possessed of an internal strength value of at least about 5 minutes, retentive of an affinity for the surface of a smooth oriented polyester film equal to at least about 225 grams per 1.25 centimeters of width, when measured after storage at 5* C. for one year, and capable of displaying a tensile shear value of at least 70 kilograms per square centimeter after cure.

Claim 7

an effective amount of a dual curing system which is substantially inactive at room temperature and which contains about 1-5 percent, based on the total weight of the blend, of a peroxide curing agent for the unsaturated groups and at least a stoichiometric amount of an epoxy group curing agent, said constituents being present in amounts such as to render said blend when formed per se in a 75 micron layer, tacky, flexible and self-sustaining, possessed of an internal strength value of at least about 5 minutes, retentive of an affinity for the surface of a smooth oriented polyester film equal to at least about 225 grams per 1.25 centimeters of width, when measured after storage at 5* C. for one year, and capable of displaying a tensile shear value of at least 70 kilograms per square centimeter after cure.

Claim 8

an effective amount of a dual curing system which is substantially inactive at room temperature and which contains about 1-5 percent, based on the total weight of the blend, of a peroxide curing agent for the unsaturated groups and at least a stoichiometric amount of an epoxy group curing agent, said constitutents being present in amounts such as to render said blend when formed per se in a 75 micron layer, tacky, flexible and self-sustaining, possessed of an internal strength value of at least about 5 minutes, retentive of an affinity for the surface of a smooth oriented polyester film equal to at least about 225 grams per 1.25 centimeters of width, when measured after storage at 5* C. for one year, and capable of displaying a tensile shear value of at least 70 kilograms per square centimeter after cure.

Claim 9

an effective amount of a dual curing system which is substantially inactive at room temperature and which contains about 1-5 percent, based on the total weight of the blend, of a peroxide curing agent for the unsaturated groups and at least a stoichiometric amount of an epoxy group curing agent, said constituents being present in amounts such as to render said blend when formed per se in a 75 micron layer, tacky, flexible and self-sustaining, possessed of an internal strength value of at least about 5 minutes, retentive of an affinity for the surface of a smooth oriented polyester film equal to at least about 225 grams per 1.25 centimeters of width, when measured after storage at 5* C. for one year, and capable of displaying a tensile shear value of at least 70 kilograms per square centimeter after cure.

Claim 10

An article according to claim 2 wherein the component containing the acrylic-type unsaturation is the reaction product of about 1 mole of the diglycidyl ether of 4,4''-isopropylidenediphenol with about 2 moles of methacrylic acid wherein substantially all of the oxirane groups have reacted.

Claim 11

An article according to claim 2 wherein the component containing the acrylic-type unsaturation is the reaction product of about 1 mole of the diglycidyl ether of 4,4''-isopropylidenediphenol with about 1 mole of methacrylic acid wherein substantially one-half of the oxirane groups have reacted.

Claim 12

An article according to claim 1 wherein the dual curing system is a combination of a peroxide and fumaric acid.

Claim 13

An article according to claim 5 wherein the peroxide is tert-butyl peroctoate.

Claim 14

An article according to claim 1 wherein the component containing the acrylic-type unsaturation is a reaction product of an epoxy resin of 4,4''-isopropylidenediphenol with acrylic acid.

Claim 15

A composite tape-like product capable of being wound upon itself in roll form and subsequently unwound without delamination or transfer comprising a flexible sheet backing having adhered thereto over one major surface a tacky, heat-hardenable, substantially solvent-free, cold flow-resistant, coherent layer which essentially comprises a storable uniform blend of polymers which are mutually soluble at 95* C., said blend comprising a physical mixture of

Claim 16

A composite thermosetting adhesive transfer tape comprising in combination a self-supporting smooth web and, releasably adhered to one face of said web, a tacky, heat-hardenable substantially solvent-free adhesive film, whereby the exposed surface of said adhesive may be adhered to a structure to be bonded, the web removed without disrupting the adhesive film, a second structure applied to the newly exposed adhesive surface and temporarily adhered thereby to the first structure, and the adhesive film thereafter heat-cured to permanently bond said structures together, said adhesive film consisting essentially of a storable uniform blend of polymers which are mutually soluble at 95* C., said blend comprising a physical mixture of

Claim 17

A fiber-reinforced tacky heat-advancing adhesive film comprising in combination a fibrous web provided, at least at one major surface, with a tacky, heat-hardenable, substantially solvent-free storable uniform blend of polymers which are mutually soluble at 95* C., said blend comprising a physical mixture of (1) 100 parts by weight of a thermosettable resin system containing both acrylic-type unsaturation and epoxy groups, one component of which is a pourable liquid at 95* C. having the formula