Adhesive composition for absorbent articles

Patent metadata

Field	Value
Publication number	US-2019322901-A1
Application number	US-201916387675-A
Country	US
Kind code	A1
Filing date	Apr 18, 2019
Priority date	Apr 20, 2018
Publication date	Oct 24, 2019
Grant date	—

Abstract

Described herein is an adhesive composition including at least 90 wt. % of a copolymer including from about 30 wt. % to about 70 wt. % of propene monomer units and from about 30 wt. % to about 70 wt. % of 1-butene monomer units. The adhesive composition can have a viscosity of from about 2,000 mPa·s to about 11,500 mPa·s at 150° C. The adhesive composition can have an Enthalpy of Fusion of less than 17 J/g. The adhesive composition can have a Tensile Strength at Yield of from about 0.5 MPa to about 1.5 MPa. The copolymer can have a Static Peel Time of at least 220 seconds.

First claim

What is claimed is:

1 . An adhesive composition comprising at least 90 wt. % of a copolymer, wherein the copolymer comprises from about 30 wt. % to about 70 wt. % of propene monomer units and from about 30 wt. % to about 70 wt. % of 1-butene monomer units;
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; wherein the adhesive composition has an Enthalpy of Fusion of less than 17 J/g, as measured by the Enthalpy of Fusion Test Method; 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 Test Method; and wherein the copolymer has a Static Peel Time of at least 220 seconds, as measured by the Static Peel Time Test Method.

2 . The adhesive composition of claim 1 , wherein the Static Peel Time of the copolymer is from about 225 seconds to about 600 seconds.

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 from about 10 decimillimeters to about 35 decimillimeters, 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 copolymer comprises from about 45 wt. % to about 55 wt. % 1-butene monomer units.

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/cm 3 to 0.85 g/cm 3 at 150° C.

11 . The adhesive composition of claim 1 , wherein the adhesive composition has a Storage Modulus at 37° C. of from about 4.5 MPa to about 9.5 MPa, as measured by the Oscillatory Rheometry Test Method.

12 . An adhesive composition comprising at least 90 wt. % of a copolymer, wherein the copolymer comprises from about 30 wt. % to about 70 wt. % of propene monomer units and from about 30 wt. % to about 70 wt. % of 1-butene monomer units;
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; wherein the adhesive composition has an Enthalpy of Fusion of from about 5 J/g to 17 J/g, as measured by the Enthalpy of Fusion Test Method; and wherein the copolymer has a Static Peel Time of at least 220 seconds, as measured by the Static Peel Time Test Method.

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

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

15 . The adhesive composition of claim 12 , wherein the copolymer comprises from about 45 wt. % to about 55 wt. % 1-butene monomer units.

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 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 at least 90 wt. % of a copolymer, wherein the copolymer comprises from about 40 wt. % to about 60 wt. % of propene monomer units and from about 40 wt. % to about 60 wt. % of 1-butene monomer units;
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; and wherein the adhesive composition has an Enthalpy of Fusion of from about 5 J/g to 17 J/g, as measured by the Enthalpy of Fusion Test Method.

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

Assignees

• Procter & Gamble

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

Classifications

• C08F210/08

  Butenes · CPC title

• C08F2800/10

  as molar percentages · CPC title

• C09J2423/10

  Presence of homo or copolymers of propene · CPC title

• C09J4/06 Primary

  {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 · CPC title

• C08F210/06

  Propene · CPC title