Repulpable acrylic acid based pressure-sensitive adhesive

Claim 2

A high-temperature shear-resistant, water-dispersible pressure-sensitive adhesive comprising (1) a copolymer of from 85 to 97 percent by weight of acrylic acid compound and from 15 to 3 percent by weight of acrylamide, said acrylic acid compound including at least 75 weight percent acrylic acid and 25 to 0 weight percent of a plasticizing monomer, (2) a plasticizer-tackifier comprising a polyhydric alcohol compound in an amount of from 100 to 500 parts for every 100 parts of copolymer and (3) from 0,5 to 2,5 percent based on copolymer of a monobasic alkali.

Claim 3

An adhesive according to claim 1 in which a di-tertiary amine has been included in an amount of from 0,5 to 3 percent by weight of the copolymer.

Claim 4

A process for producing a high-temperature shear-resistant, water-dispersible pressure-sensitive adhesive comprising (1) a copolymer of from 85 to 97 percent by weight of acrylic acid compound and from 15 to 3 percent by weight of acrylamide, (2) a plasticizer-tackifier comprising a polyhydric alcohol compound in an amount of from 100 to 500 parts for every 100 parts of copolymer and (3) from 0,5 to 2,5 percent based on copolymer of a monobasic alkali which comprises (1) heating together an acrylic acid compound and acrylamide in an aqueous solvent in the presence of a free radical catalyst to obtain the copolymer, said acrylic acid compound including at least 75 weight_percent acrylic acid and 25 to 0 weight percent of a plasticizing monomer, and (2) compounding the copolymer with a plasticizer-tackifier comprising a polyhydric alcohol compound and a monobasic alkali.

Claim 5

A process for producing a high-temperature shear-resistant, water-dispersible pressure-sensitive adhesive comprising (1) a copolymer of from 85 to 97 percent by weight of acrylic acid compound and from 15 to 3 percent by weight of acrylamide, (2) a plasticizer-tackifier comprising a polyhydric alcohol compound in an amount of from 100 to 500 parts for every 100 parts of copolymer and (3) from 0,5 to 2,5 percent based on copolymer of a monobasic alkali which comprises (1) heating together an acrylic acid compound and acrylamide in an aqueous solvent in the presence of a free radical catalyst to obtain the copolymer, said acrylic acid compound including at least 75 weight_percent acrylic acid and 25 to 0 weight percent of a plasticizing monomer, and (2) compounding the copolymer with a plasticizer-tackifier comprising a polyhydric alcohol compound and a monobasic alkali.

Claim 6

A high - temperature shear - resistant, water-dispersible pressure-sensitive adhesive comprising (1) a copolymer of from 90 to 95 weight percent of acrylic acid compound and 10 to 5 percent by weight acrylamid, said acrylic acid compound including at least 75 weight percent acrylic acid and 25 to 0 weight percent of a plasticizing monomer, (2) a plasticizer tackifier comprising a polyhydric alcohol compound in an amount of from 100 to 500 parts for every 100 parts of copolymer and (3) from 0,5 to 2,5 percent based on copolymer of a monobasic alkali.

Claim 7

A high - temperature shear - resistant, water-dispersible pressure-sensitive adhesive comprising (1) a copolymer of from 90 to 95 weight percent of acrylic acid compound and 10 to 5 percent by weight acrylamid, said acrylic acid compound including at least 75 weight percent acrylic acid and 25 to 0 weight percent of a plasticizing monomer, (2) a plasticizer tackifier comprising a polyhydric alcohol compound in an amount of from 100 to 500 parts for every 100 parts of copolymer and (3) from 0,5 to 2,5 percent based on copolymer of a monobasic alkali.

Claim 8

An adhesive according to claim 2 wherein said di-tertiary amine is triethylenediamine.

Claim 9

A pressure-sensitive adhesive tape comprising the pressure-sensitive adhesive of claim 1 applied to a backing.

Claim 10

A pressure-sensitive adhesive tape comprising the pressure-sensitive adhesive of claim 2 applied to a backing.

Claim 11

A pressure-sensitive adhesive tape comprising pressure-sensitive adhesive of claim 4 applied to a backing.

Claim 12

A laminate comprising the pressure-sensitive adhesive of claim 1 between two paper sheets.

Claim 13

A laminate comprising the pressure-sensitive adhesive of claim 2 between two paper sheets.

Claim 14

A laminate comprising the pressure-sensitive adhesive of claim 4 between two paper sheets.