IP Library › Granted Patent US 12674081
Granted Patent B2
US 12674081 · App. 17/941,641 · Granted Jul 7, 2026

Compositions, articles, and methods involving pressure-sensitive adhesives comprising polymer-grafted particles

Inventors: Robert J. Macfarlane (Cambridge, MA); Griffen Desroches (Cambridge, MA); Jacob Przyojski (Norderstedt, DE)
Assignees: Massachusetts Institute of Technology; tesa SE
C09J11/08B32B7/12C09J7/385C09J11/04B32B27/08B32B27/36B32B2250/244B32B2255/10B32B2255/26C09J2301/302C09J2301/408C09J2433/00C09J2451/00
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Quick Facts
Patent No.
US 12674081
App. No.
17/941,641
Granted
Jul 7, 2026
Kind
B2
Abstract

Compositions, articles, and methods involving pressure-sensitive adhesives comprising polymer-grafted particles are generally described.

Claims (36)

1 . A composition comprising:

a pressure-sensitive adhesive comprising polymer-grafted particles and one or more base polymer components,

wherein the polymer-grafted particles are selected in conjunction with the pressure-sensitive adhesive such that the polymer-grafted particles are capable of interacting with at least one component of the pressure-sensitive adhesive, resulting in an increase in cohesive strength of the pressure-sensitive adhesive without a loss of adhesive strength as compared to an essentially identical composition that is otherwise equivalent but does not include the polymer-grafted particles under essentially identical conditions, and

wherein at least two polymer chains of the polymer-grafted particles are non-covalently bound to the one or more base polymer components.

2 . The composition of claim 1 , wherein the polymer-grafted particles comprise particles having one or more surfaces to which polymer chains are grafted.

3 . The composition of claim 1 , wherein the pressure-sensitive adhesive comprises a crosslinking agent.

4 . The composition of claim 1 , wherein at least one polymer chain of the polymer-grafted particles is ionically bound to the one or more base polymer components of the pressure-sensitive adhesive.

5 . The composition of claim 1 , wherein at least one polymer chain of the polymer-grafted particles is covalently bound to the one or more base polymer components of the pressure-sensitive adhesive.

6 . The composition of claim 3 , wherein at least one polymer chain of the polymer-grafted particles is bound to the one or more base polymer components of the pressure-sensitive adhesive via crosslinking of the crosslinking agent.

7 . The composition of claim 6 , wherein the at least one polymer chain of the polymer-grafted particles is bound to the one or more base polymer components of the pressure-sensitive adhesive via covalent crosslinking of the crosslinking agent.

8 . The composition of claim 6 , wherein the at least one polymer chain of the polymer-grafted particles is bound to the one or more base polymer components of the pressure-sensitive adhesive via non-covalent crosslinking of the crosslinking agent.

9 . The composition of claim 1 , wherein the pressure-sensitive adhesive comprises the polymer-grafted particles in an amount between greater than or equal to 0.01 wt. % and less than or equal to 25 wt. % versus the total weight of the pressure-sensitive adhesive.

10 . A composition of claim 1 , comprising:

a pressure-sensitive adhesive comprising polymer-grafted particles,

wherein the polymer-grafted particles are selected in conjunction with the pressure-sensitive adhesive such that the polymer-grafted particles are capable of interacting with at least one component of the pressure-sensitive adhesive, resulting in an increase in cohesive strength of the pressure-sensitive adhesive without a loss of adhesive strength as compared to an essentially identical composition that is otherwise equivalent but does not include the polymer-grafted particles under essentially identical conditions, and

wherein the composition has a glass transition temperature between greater than or equal to −50 degrees Celsius and less than or equal to 100 degrees Celsius.

11 . An article, comprising:

one or more substrates; and

the composition as recited in claim 1 .

12 . An article of claim 11 , comprising:

one or more substrates; and

a pressure-sensitive adhesive comprising polymer-grafted particles,

wherein the polymer-grafted particles are selected in conjunction with the pressure-sensitive adhesive such that the polymer-grafted particles are capable of interacting with at least one component of the pressure-sensitive adhesive, resulting in an increase in cohesive strength of the pressure-sensitive adhesive without a loss of adhesive strength as compared to an essentially identical composition that is otherwise equivalent but does not include the polymer-grafted particles under essentially identical conditions,

wherein an adhesion strength of the pressure-sensitive adhesive is between greater than or equal to 80% and less than or equal to 120% of an adhesion strength of an essentially identical pressure-sensitive adhesive that is otherwise equivalent but does not include the polymer-grafted particles under essentially identical conditions.

13 . The article of claim 12 , wherein the adhesion strength of the pressure-sensitive adhesive is between greater than or equal to 2 N/cm and less than or equal to 3 N/cm.

14 . An article, comprising:

one or more substrates; and

a pressure-sensitive adhesive comprising polymer-grafted particles,

wherein the polymer-grafted particles are selected in conjunction with the pressure-sensitive adhesive such that the polymer-grafted particles are capable of interacting with at least one component of the pressure-sensitive adhesive, resulting in an increase in cohesive strength of the pressure-sensitive adhesive without a loss of adhesive strength as compared to an essentially identical composition that is otherwise equivalent but does not include the polymer-grafted particles under essentially identical conditions,

wherein a dynamic overlap shear strength of the pressure-sensitive adhesive is between greater than or equal to 110% and less than or equal to 150% of a dynamic overlap shear strength of an essentially identical pressure-sensitive adhesive that is otherwise equivalent but does not include the polymer-grafted particles under essentially identical conditions.

15 . The article of claim 14 , wherein the dynamic overlap shear strength of the pressure-sensitive adhesive is between greater than or equal to 75 kPa and less than or equal to 450 kPa.

16 . An article, comprising:

one or more substrates; and

a pressure-sensitive adhesive comprising polymer-grafted particles,

wherein the polymer-grafted particles are selected in conjunction with the pressure-sensitive adhesive such that the polymer-grafted particles are capable of interacting with at least one component of the pressure-sensitive adhesive, resulting in an increase in cohesive strength of the pressure-sensitive adhesive without a loss of adhesive strength as compared to an essentially identical composition that is otherwise equivalent but does not include the polymer-grafted particles under essentially identical conditions,

wherein an adhesion time of the pressure-sensitive adhesive prior to failure under a static load is between greater than or equal to 1.2 times and less than or equal to 4 times greater than an adhesion time of an essentially identical pressure-sensitive adhesive that is otherwise equivalent but does not include the polymer-grafted particles under essentially identical conditions.