IP Library › Granted Patent US 11,021,636

Granted Patent B2

US 11,021,636 · App. 16/387,689 · Granted Jun 1, 2021

Adhesive composition for absorbent articles

Inventors: Robert Haines Turner (Cincinnati, OH); Torsten Lindner (Kronberg, DE); Matthias Morand (Bad Soden, DE); Benjamin John Kutay (Cincinnati, OH); Holger Beruda (Schwalbach, DE); Ekaterina Ponomarenko (Mechernich, DE); William L. Bunnelle (Ham Lake, MN); Jon Fagerness (Coon Rapids, MN); Nick Fowler (Odessa, TX); Bill Turner (Odessa, TX); Andres Sustic (Odessa, TX); Enrico Buenacosa (Odessa, TX); Steve Oetting (Odessa, TX); Steve McHaney (Odessa, TX); J. J. DeCair (Odessa, TX)

Assignee: The Procter & Gamble Company

C09J123/20 C08L23/12 C08L23/14 C08L23/16 C08L23/20 C09J123/142

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Quick Facts

Patent No.: US 11,021,636
App. No.: 16/387,689
Granted: Jun 1, 2021
Kind: B2

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Abstract

Described herein is an adhesive composition including (a) from about 70 wt. % to about 90 wt. % of one or more copolymers, and (b) from about 10 wt. % to about 30 wt. % of one or more heterophase copolymers. The one or more copolymers include (i) from about 30 mole % to about 70 mole % of monomer units selected from the group consisting of ethylene, 1-butene, and mixtures thereof; and (ii) from about 30 mole % to about 70 mole % of propene monomer units. The adhesive composition is free of polyisobutylene. The adhesive composition has a viscosity of from about 2,000 mPa·s to about 11,500 mPa·s at 150° C. The one or more heterophase copolymers includes a first heterophase copolymer and a second heterophase copolymer.

Claims (39)

1. An adhesive composition comprising:

(a) from about 70 wt. % to about 90 wt. % of one or more amorphous copolymers, wherein the one or more amorphous copolymers comprise (i) from about 30 mole % to about 70 mole % of monomer units selected from the group consisting of ethylene, 1-butene, and mixtures thereof; and (ii) from about 30 mole % to about 70 mole % of propene monomer units;

(b) from about 10 wt. % to about 30 wt. % of heterophase copolymers;

(d) wherein the adhesive composition has a viscosity of from about 2,000 mPa·s to about 11,500 mPa·s at 150° C., as measured by the Viscosity Test Method;

(e) wherein the heterophase copolymers comprise a first heterophase copolymer and a second heterophase copolymer;

(f) wherein the adhesive composition comprises from about 5 wt. % to about 15 wt. % of the first heterophase copolymer and from about 5 wt. % to about 15 wt. % of the second heterophase copolymer; and

(g) wherein the first heterophase copolymer has a higher Enthalpy of Fusion than the second heterophase copolymer, as measured by the Enthalpy of Fusion Test Method.

2. The adhesive composition of claim 1 , wherein adhesive composition has a Static Peel Time of at least 220 seconds, as measured by the Static Peel Time Test Method.

3. The adhesive composition of claim 1 , wherein the adhesive composition has an Enthalpy of Fusion of less than 15 J/g.

4. The adhesive composition of claim 1 , wherein the viscosity of the adhesive composition is less than 7,000 mPa·s at 150° C.

5. The adhesive composition of claim 1 , wherein the viscosity of the adhesive composition is from about 4,000 mPa·s to about 6,500 mPa·s at 150° C.

6. The adhesive composition of claim 1 , wherein at least one of the one or more amorphous copolymers comprises from about 30 wt. % to about 70 wt. % 1-butene monomer units.

7. The adhesive composition of claim 1 , wherein the adhesive composition is free of a tackifier.

8. The adhesive composition of claim 1 , wherein the adhesive composition has a density of from about 0.5 g/cm 3 to 0.85 g/cm 3 at 150° C.

9. The adhesive composition of claim 1 , wherein the one or more amorphous copolymers comprise a first amorphous copolymer and a second amorphous copolymer, and wherein the adhesive composition comprises from about 35 wt. % to about 80 wt. % of the first amorphous copolymer and from about 10 wt. % to about 35 wt. % of the second amorphous copolymer.

10. An adhesive composition comprising:

(a) from about 50 wt. % to about 80 wt. % of amorphous copolymers, wherein the amorphous copolymers comprise (i) from about 30 mole % to about 70 mole % of monomer units selected from the group consisting of ethylene, 1-butene, and mixtures thereof; and (ii) from about 30 mole % to about 70 mole % of propene monomer units;

(b) from about 20 wt. % to about 50 wt. % of one or more heterophase copolymers;

(d) wherein the adhesive composition has a viscosity of from about 2,000 mPa·s to about 11,500 mPa·s at 150° C., as measured by the Viscosity Test Method;

(e) wherein the adhesive composition has an Enthalpy of Fusion of less than 15 J/g, as measured by the Enthalpy of Fusion Test Method; and

(f) wherein the amorphous copolymers comprise a first amorphous copolymer and a second amorphous copolymer, and wherein the adhesive composition comprises from about 40 wt. % to about 75 wt. % of the first amorphous copolymer and from about 5 wt. % to about 40 wt. % of the second amorphous copolymer.

11. The adhesive composition of claim 10 , wherein the adhesive composition has a Static Peel Time of at least 220 seconds, as measured by the Static Peel Time Test Method.

12. The adhesive composition of claim 10 , wherein the one or more heterophase copolymers comprises a first heterophase copolymer and a second heterophase copolymer; wherein the adhesive composition comprises from about 10 wt. % to about 25 wt. % of the first heterophase copolymer and from about 10 wt. % to about 25 wt. % of the second heterophase copolymer; and wherein the first heterophase copolymer has a higher Enthalpy of Fusion than the second heterophase copolymer, as measured by the Enthalpy of Fusion Test Method.

13. The adhesive composition of claim 10 , wherein the viscosity of the adhesive composition is from about 2,000 mPa·s to about 7,000 mPa·s at 150° C.

14. The adhesive composition of claim 10 , wherein the viscosity of the adhesive composition is from about 4,000 mPa·s to about 6,500 mPa·s at 150° C.

15. The adhesive composition of claim 10 , wherein the amorphous copolymers comprise from about 30 wt. % to about 70 wt. % 1-butene monomer units.

16. The adhesive composition of claim 10 , wherein the adhesive composition is free of a tackifier.

17. The adhesive composition of claim 10 , wherein the adhesive composition has a density of from about 0.5 g/cm 3 to 0.85 g/cm 3 at 150° C.

18. An adhesive composition comprising:

(a) from about 70 wt. % to about 90 wt. % of amorphous copolymers, wherein the amorphous copolymers comprise (i) from about 30 mole % to about 70 mole % of 1-butene monomer units; and (ii) from about 30 mole % to about 70 mole % of propene monomer units;

(b) from about 10 wt. % to about 30 wt. % of one or more heterophase copolymers;

(d) wherein the adhesive composition has a viscosity of from about 2,000 mPa·s to about 11,500 mPa·s at 150° C., as measured by the Viscosity Test Method;

(e) wherein the adhesive composition has an Enthalpy of Fusion of less than 15 J/g, according to the Enthalpy of Fusion Test Method; and

(f) wherein the amorphous copolymers comprise a first amorphous copolymer and a second amorphous copolymer, and wherein the adhesive composition comprises from about 35 wt. % to about 80 wt. % of the first amorphous copolymer and from about 10 wt. % to about 35 wt. % of the second amorphous copolymer.

19. The adhesive composition of claim 18 , wherein the adhesive composition is free of a tackifier.

20. The adhesive composition of claim 18 , wherein the adhesive composition has a density of from about 0.5 g/cm 3 to 0.85 g/cm 3 at 150° C.

Continuity (2)

Provisional Application 62660353 · Apr 20, 2018

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