ADHESIVE COMPOSITION FOR ABSORBENT ARTICLES

• US 20190322900A1
• Filed: 04/18/2019
• Published: 10/24/2019
• Est. Priority Date: 04/20/2018
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: TURNER, Robert Haines, LINDNER, Torsten, MORAND, Matthias, KUTAY, Benjamin John, BERUDA, Holger, PONOMARENKO, Ekaterina, BUNNELLE, William L., FAGERNESS, Jon, FOWLER, Nick, TURNER, Bill, SUSTIC, Andres, BUENACOSA, Enrico, OETTING, Steve, McHANEY, Steve, DeCAIR, J.J.
• Granted Patent: US 11,505,719 B2
• Time in Patent Office: Days
• CPC Class Codes: C08F 210/06 Propene
• CPC Class Codes: C08F 210/08 Butenes
• CPC Class Codes: C08L 23/14 Copolymers of propene C08L23/16 takes precedence
• CPC Class Codes: C08L 23/20 having four to nine carbon atoms
• CPC Class Codes: C09J 123/02 not modified by chemical after-treatment
• CPC Class Codes: C09J 123/14 Copolymers of propene C09J123/16 takes precedence
• CPC Class Codes: C09J 123/20 having four to nine carbon atoms
• CPC Class Codes: C09J 2301/414 presence of a copolymer
• CPC Class Codes: C09J 2400/263 in the substrate
• CPC Class Codes: C09J 2423/10 Presence of homo or copolymers of propene
• CPC Class Codes: C09J 4/06 Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00

Abstract

Described herein is an adhesive composition including a copolymer. The adhesive composition has a viscosity of from about 2,000 mPa·s to about 11,500 mPa·s at 150° C. The adhesive composition has a Storage Modulus at 37° C. of from about 3 MPa to 9.5 MPa. The adhesive composition has a Yield Stress at 37° C. of from about 0.8 MPa to about 1.45 MPa.

Claims

1. An adhesive composition comprising a copolymer;

a. 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;

b. wherein the adhesive composition has a Storage Modulus at 37°

C. of from about 3 MPa to 9.5 MPa, as measured by the Oscillatory Rheometry Test Method; and

c. wherein the adhesive composition has a Yield Stress at 37°

C. of from about 0.8 MPa to about 1.45 MPa, as measured by the Extensional Test Method.

2. The adhesive composition of claim 1, wherein the 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 viscosity of the adhesive composition is less than 7,000 mPa·

s at 150°

C.

4. 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.

5. The adhesive composition of claim 1, wherein the adhesive composition has a Needle Penetration of about 10 to about 35 decimeters, as measured by the Needle Penetration Test Method.

6. The adhesive composition of claim 1, wherein the adhesive composition comprises at least 95 wt. % of the copolymer.

7. The adhesive composition of claim 1, wherein the adhesive composition has a Toughness at 37°

C. of from about 2 MJ/m³ to about 8 MJ/m³, as measured by the Extensional Test Method.

8. The adhesive composition of claim 1, wherein the adhesive composition is free of a heterophase copolymer.

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

10. The adhesive composition of claim 1, wherein the adhesive composition has a density of from about 0.5 g/cm³ to 0.85 g/cm³ at 150°

C.

11. The adhesive composition of claim 1, wherein the Storage Modulus at 37°

C. of the adhesive composition is from about 5 MPa to 9.5 MPa.

12. An adhesive composition comprising a copolymer, wherein the copolymer comprises propene monomer units and 1-butene monomer units;

a. wherein the adhesive composition has a viscosity of from about 2,000 cP to about 11,500 cP at 150°

C., as measured by the Viscosity Test Method; and

b. wherein the adhesive composition has a Storage Modulus at 37°

C. of from about 3 MPa to 9.5 MPa, as measured by the Oscillatory Rheometry Test Method.

13. The adhesive composition of claim 12, wherein the viscosity of the adhesive composition is from about 4,000 cP to about 6,500 cP at 150°

C.

14. The adhesive composition of claims 12, wherein the adhesive composition comprises at least 95 wt. % of the copolymer.

15. The adhesive composition of claim 12, wherein the adhesive composition has a Toughness at 37°

C. of from about 2 MJ/m³ to about 8 MJ/m³, as measured by the Extensional Test Method.

16. The adhesive composition of claim 12, wherein the adhesive composition is free of a tackifier.

17. The adhesive composition of claim 12, wherein the Storage Modulus at 37°

C. of the adhesive composition is from about 5 MPa to 9.5 MPa.

18. An adhesive composition comprising a copolymer, wherein the adhesive composition is free of a tackifier;

a. wherein the copolymer comprises propene monomer units and 1-butene monomer units;

b. wherein the adhesive composition has a viscosity of from about 2,000 cP to about 11,500 cP at 150°

C., as measured by the Viscosity Test Method;

c. wherein the adhesive composition has an average Enthalpy of Fusion of less than 17 J/g, as measured by the Enthalpy of Fusion Test Method;

d. wherein the adhesive composition has a Storage Modulus at 37°

C. of from about 3 MPa to 9.5 MPa, as measured by the Oscillatory Rheometry Test Method;

e. wherein the adhesive composition has a Yield Stress at 37°

C. of from about 0.8 MPa to about 1.45 MPa, as measured by the Extensional Test Method;

f. wherein the adhesive composition has a Tensile Strength at Yield of from about 0.5 MPa to about 1.5 MPa, as measured by the Tensile Strength at Yield Test Method; and

g. wherein the adhesive composition has a Toughness at 37°

C. of from about 2 MJ/m³ to about 8 MJ/m³, as measured by the Extensional Test Method.

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

20. The adhesive composition of claim 18, wherein the viscosity of the adhesive composition is from about 4,000 cP to about 6,500 cP at 150°

C.