Adhesive composition

Claim 2

A hot melt adhesive composition comprising a heterogeneous mixture in finely divided form of (A) from about 10% to about 97% by weight of a polyester having a melting point of between about 90° and about 140° C. and a heat of fusion of from about 0.1 to about 10 calories per gram, said polyester being selected from the group consisting of (a) polyesters derived from a mixture of dicarboxylic acids, about 40 to about 80 mole percent thereof being terephthalic acid or a derivative thereof and the balance being selected from aliphatic, alicyclic and aromatic dicarboxylic acids other than terephthalic, and at least one glycol containing from 2 to 8 carbon atoms, and (b) polyesters derived from terephthalic acid or a derivative thereof and at least one glycol having from 2 to 8 carbon atoms, with the provision that when said polyester contains ethylene glycol, said ethylene glycol is less than about 80 mole percent of the glycol, (B) and from about 90% to about 3% by weight of a polyamide having a melting point of from about 50° C. to about 200° C., said polyester and said polyamide having inherent viscosities of from about 0.5 to about 1.2 as measured at 25° C. using 0.25 gram of polymer per 100 ml. of a solvent composed of 60% phenol and 40% tetrachloroethane.

Claim 3

An adhesive composition according to claim 1 comprising from about 70% to about 97% by weight of said polyester and from about 30% to about 3% of said polyamide.

Claim 4

An adhesive composition according to claim 1 comprising about 85% to about 97% by weight of said polyester and from about 15% to about 3% of said polyamide.

Claim 5

An adhesive composition according to claim 1 wherein from about 15 to about 45 mole percent of the glycol component is 1,4-butanediol.

Claim 6

An adhesive composition according to claim 1 wherein said polyester is derived from a glycol component consisting essentially of ethylene glycol and 1,4-butanediol, and a dicarboxylic acid component consisting essentially of terephthalic acid and adipic acid.

Claim 7

An adhesive composition according to claim 1 wherein said polyamide is a terpolymer of nylon 6, nylon 66 and a member selected from the group consisting of nylon 10, nylon 11, and nylon 12.

Claim 8

An adhesive composition according to claim 1 wherein said polyamide is selected from the group consisting of nylon 10, nylon 11, and nylon 12.

Claim 9

An adhesive composition according to claim 1 wherein the glycol component of said polyester consists essentially of at least one glycol containing from 2 to 8 carbon atoms.

Claim 10

Method of preparing a finely-divided, free-flowing hot melt adhesive powder which comrpises (A) melt blending from about 10% to about 97% by weight of a polyester having a melting point of between about 90° and about 140° C. and a heat of fusion of from about 0.1 to about 10 calories per gram, said polyester being selected from the group consisting of (a) polyesters derived from a mixture of dicarboxylic acids, about 40 to about 80 mole percent thereof being terephthalic acid or a derivative thereof and the balance being selected from aliphatic, alicyclic and aromatic dicarboxylic acids other than terephthalic, and at least one glycol containing from 2 to 8 carbon atoms, and (b) polyesters derived from terephthalic acid or a derivative thereof and at least one glycol having from 2 to 8 carbon atoms, with the provision that when said polyester contains ethylene glycol, said ethylene glycol is less than about 80 mole percent of the glycol, and from about 90% to about 3% by weight of a polyamide having a melting point of from about 50° C. to about 200° C., said polyester and said polyamide having inherent viscosities of from about 0.5 to about 1.2 as measured at 25° C. using 0.25 gram of polymer per 100 ml. of a solvent composed of 60% phenol and 40% tetrachloroethane; (B) forming solid bodies from the blend resulting from (A); and (C) cryogenically grinding said solid bodies into said powder.

Claim 11

Method of preparing a finely-divided, free-flowing hot melt adhesive powder which comrpises (A) melt blending from about 10% to about 97% by weight of a polyester having a melting point of between about 90° and about 140° C. and a heat of fusion of from about 0.1 to about 10 calories per gram, said polyester being selected from the group consisting of (a) polyesters derived from a mixture of dicarboxylic acids, about 40 to about 80 mole percent thereof being terephthalic acid or a derivative thereof and the balance being selected from aliphatic, alicyclic and aromatic dicarboxylic acids other than terephthalic, and at least one glycol containing from 2 to 8 carbon atoms, and (b) polyesters derived from terephthalic acid or a derivative thereof and at least one glycol having from 2 to 8 carbon atoms, with the provision that when said polyester contains ethylene glycol, said ethylene glycol is less than about 80 mole percent of the glycol, and from about 90% to about 3% by weight of a polyamide having a melting point of from about 50° C. to about 200° C., said polyester and said polyamide having inherent viscosities of from about 0.5 to about 1.2 as measured at 25° C. using 0.25 gram of polymer per 100 ml. of a solvent composed of 60% phenol and 40% tetrachloroethane; (B) forming solid bodies from the blend resulting from (A); and (C) cryogenically grinding said solid bodies into said powder.

Claim 12

Method of preparing a finely-divided, free-flowing hot melt adhesive powder which comprises (A) melt blending from about 70% to about 97% by weight of a polyester derived from a glycol component of which from about 15 to about 45 mole percent is 1,4-butanediol and a dicarboxylic acid component of which at least about 40 to 80 mole percent is terephthalic acid or a derivative thereof and the balance being selected from aliphatic, alicyclic, and aromatic dicarboxylic acids other than terephthalic, said polyester having a melting point of between about 90° and about 140° C. and a heat of fusion of from about 0.1 to about 10 calories per gram, and from about 30% to about 3% by weight of a polyamide having a melting point of from about 50° C. to about 200° C., said polyester and said polyamide having inherent viscosities of from about 0.5 to about 1.2 as measured at 25° C. using 0.25 gram of polymer per 100 ml. of a solvent composed of 60% phenol and 40% tetrachloroethane; (B) forming solid bodies from the blend resulting from (A); and (C) cryogenically grinding said solid bodies into said powder.

Claim 13

Method of preparing a finely-divided, free-flowing hot melt adhesive powder which comprises (A) melt blending from about 70% to about 97% by weight of a polyester derived from a glycol component of which from about 15 to about 45 mole percent is 1,4-butanediol and a dicarboxylic acid component of which at least about 40 to 80 mole percent is terephthalic acid or a derivative thereof and the balance being selected from aliphatic, alicyclic, and aromatic dicarboxylic acids other than terephthalic, said polyester having a melting point of between about 90° and about 140° C. and a heat of fusion of from about 0.1 to about 10 calories per gram, and from about 30% to about 3% by weight of a polyamide having a melting point of from about 50° C. to about 200° C., said polyester and said polyamide having inherent viscosities of from about 0.5 to about 1.2 as measured at 25° C. using 0.25 gram of polymer per 100 ml. of a solvent composed of 60% phenol and 40% tetrachloroethane; (B) forming solid bodies from the blend resulting from (A); and (C) cryogenically grinding said solid bodies into said powder.

Claim 14

Method of preparing a finely-divided, free-flowing hot melt adhesive powder which comprises (A) melt blending from about 85% to about 97% by weight of a polyester derived from a glycol component of which from about 15 to about 45 mole percent is 1,4-butanediol and a dicarboxylic acid component of which at least about 40 to 80 mole percent is terephthalic acid or a derivative thereof and the blanace being selected from aliphatic, alicyclic, and aromatic dicarboxylic acids other than terephthalic, said polyester having a melting point of between about 90° and about 140° C. and a heat of fusion of from about 0.1 to about 10 calories per gram, and from about 15% to about 3% by weight of a polyamide having a melting point of from about 50° C. to about 200°C., said polyester and said polyamide having inherent viscosities of from about 0.5 to about 1.2 as measured at 25° C. using 0.25 gram of polymer per 100 ml. of a solvent composed of 60% phenol and 40% tetrachloroethane; (B) forming solid bodies from the blend resulting from (A); and (C) cryogenically grinding said solid bodies into said powder.

Claim 15

Method of preparing a finely-divided, free-flowing hot melt adhesive powder which comprises (A) melt blending from about 85% to about 97% by weight of a polyester derived from a glycol component of which from about 15 to about 45 mole percent is 1,4-butanediol and a dicarboxylic acid component of which at least about 40 to 80 mole percent is terephthalic acid or a derivative thereof and the blanace being selected from aliphatic, alicyclic, and aromatic dicarboxylic acids other than terephthalic, said polyester having a melting point of between about 90° and about 140° C. and a heat of fusion of from about 0.1 to about 10 calories per gram, and from about 15% to about 3% by weight of a polyamide having a melting point of from about 50° C. to about 200°C., said polyester and said polyamide having inherent viscosities of from about 0.5 to about 1.2 as measured at 25° C. using 0.25 gram of polymer per 100 ml. of a solvent composed of 60% phenol and 40% tetrachloroethane; (B) forming solid bodies from the blend resulting from (A); and (C) cryogenically grinding said solid bodies into said powder.

Claim 16

Method of preparing a finely-divided, free-flowing hot melt adhesive powder which comprises (A) melt blending from about 70% to about 97% by weight of a polyester derived from a glycol component consisting essentially of ethylene glycol and 1,4-butanediol and a dicarboxylic acid component consisting essentially of adipic acid and terephthalic acid or a derivative thereof said terephthalic acid or derivative thereof being present in an amount between about 40 to 80 mole percent, the balance being adipic acid, said polyester having a melting point of between about 90° and about 140° C. and a heat of fusion of from about 0.1 to about 10 calories per gram, and from about 30% to about 3% by weight of a terpolymer of nylon 6, nylon 66 and a member selected from the group consisting of nylon 10, nylon 11, and nylon 12, having a melting point of from about 50° C. to about 200° C., said polyester and said polyamide having inherent viscosities of from about 0.5 to about 1.2 as measured at 25° C. using 0.25 gram of polymer per 100 ml. of a solvent composed of 60% phenol and 40% tetrachloroethane; (B) forming solid bodies from the blend resulting from (A); and (C) cryogenically grinding said solid bodies into said powder.

Claim 17

Method of preparing a finely-divided, free-flowing hot melt adhesive powder which comprises (A) melt blending from about 70% to about 97% by weight of a polyester derived from a glycol component consisting essentially of ethylene glycol and 1,4-butanediol and a dicarboxylic acid component consisting essentially of adipic acid and terephthalic acid or a derivative thereof said terephthalic acid or derivative thereof being present in an amount between about 40 to 80 mole percent, the balance being adipic acid, said polyester having a melting point of between about 90° and about 140° C. and a heat of fusion of from about 0.1 to about 10 calories per gram, and from about 30% to about 3% by weight of a terpolymer of nylon 6, nylon 66 and a member selected from the group consisting of nylon 10, nylon 11, and nylon 12, having a melting point of from about 50° C. to about 200° C., said polyester and said polyamide having inherent viscosities of from about 0.5 to about 1.2 as measured at 25° C. using 0.25 gram of polymer per 100 ml. of a solvent composed of 60% phenol and 40% tetrachloroethane; (B) forming solid bodies from the blend resulting from (A); and (C) cryogenically grinding said solid bodies into said powder.

Claim 18

Method of preparing a finely-divided, free-flowing hot melt adhesive powder which comprises (A) melt blending from about 70% to about 97% by weight of a polyester having a melting point of between about 90° and about 140° C. and a heat of fusion of from about 0.1 to about 10 calories per gram, said polyester being selected from the group consisting of (a) polyesters derived from a mixture of dicarboxylic acids, about 40 to about 80 mole percent thereof being terephthalic acid or a derivative thereof and the balance being selected from aliphatic, alicyclic and aromatic dicarboxylic acids other than terephthalic, and at least one glycol containing from 2 to 8 carbon atoms, and (b) polyesters derived from terephthalic acid or a derivative thereof and at least one glycol having from 2 to 8 carbon atoms, with the provision that when said polyester contains ethylene glycol, said ethylene glycol is less than about 80 mole percent of the glycol, and from about 30% to about 3% by weight of a polyamide selected from the group consisting of nylon 10, nylon 11 and nylon 12 having a melting point of from about 50° C. to about 200° C., said polyester and said polyamide having inherent viscosities of from about 0.5 to about 1.2 as measured at 25° C. using 0.25 gram of polymer per 100 ml. of a solvent composed of 60% phenol and 40% tetrachloroethane; (B) forming solid bodies from the blend resulting from (A); and (C) cryogenically grinding said solid bodies into said powder.

Claim 19

Method of preparing a finely-divided, free-flowing hot melt adhesive powder which comprises (A) melt blending from about 70% to about 97% by weight of a polyester having a melting point of between about 90° and about 140° C. and a heat of fusion of from about 0.1 to about 10 calories per gram, said polyester being selected from the group consisting of (a) polyesters derived from a mixture of dicarboxylic acids, about 40 to about 80 mole percent thereof being terephthalic acid or a derivative thereof and the balance being selected from aliphatic, alicyclic and aromatic dicarboxylic acids other than terephthalic, and at least one glycol containing from 2 to 8 carbon atoms, and (b) polyesters derived from terephthalic acid or a derivative thereof and at least one glycol having from 2 to 8 carbon atoms, with the provision that when said polyester contains ethylene glycol, said ethylene glycol is less than about 80 mole percent of the glycol, and from about 30% to about 3% by weight of a polyamide selected from the group consisting of nylon 10, nylon 11 and nylon 12 having a melting point of from about 50° C. to about 200° C., said polyester and said polyamide having inherent viscosities of from about 0.5 to about 1.2 as measured at 25° C. using 0.25 gram of polymer per 100 ml. of a solvent composed of 60% phenol and 40% tetrachloroethane; (B) forming solid bodies from the blend resulting from (A); and (C) cryogenically grinding said solid bodies into said powder.