Back to results
US 2026/0176508 A1Published application
Architectured polymers and related methods
AssigneeAvery Dennison Corporation
InventorsWilliam L. BOTTORF, Yunli FANG, Andrew FULL, Xiaochuan HU, Timothy SCHUNK, Colby D. SHELMIRE, Michael T. WATERMAN
Life of this patent
Estimating the term…
Abstract
Pressure sensitive adhesives that include architectured polymers are described. Also described are various methods for producing the noted polymers and pressure sensitive adhesives. In addition, a variety of articles including tapes utilizing the pressure sensitive adhesives are described.
Claims42
A composition comprising a crosslinkable reaction product of a mixture, the mixture comprising:
- one or more monomer comprising a single polymerizable ethylenically unsaturated bond, wherein the one or more monomer is selected from the group consisting of (meth)acrylate, (meth)acrylamide, non-(meth)acrylate, and combinations thereof;
- one or more initiator;
- and
- a functional agent comprising one or more functional groups;
- wherein the crosslinkable reaction product comprises a polymer composition selected from the group consisting of a first polymer, a second polymer, and combinations thereof;
- and
- wherein any one or more of the following statements (A) to (D) applies to the polymer when present in tetrahydrofuran (THF) solution at 30° C. as determined by Gel Permeation Chromatography-Multi-Angle Light Scattering Detection-Differential Viscometry (GPC-MALS-DV):
- (A) the polymer exhibits a weight average absolute molecular weight (Mw) of within a range of from about 10,000 to about 10,000,000 g/mol;
- (B) the polymer exhibits a polydispersity index (PDI) of less than or equal to about 4.0;
- (C) the polymer exhibits an α value of less than about 0.70 calculated according to the Mark-Houwink-Sakurada equation
- [
- η
- ]
- =
- KM
- α
- wherein,
- [η] is an intrinsic viscosity of the polymer of absolute molecular weight M;
- (D) the polymer exhibits a weight average branching ratio g′w value equal to or less than about 0.90 calculated according to the equation
- g
- ′
-
- w
- =
- [
- η
-
- b
- ]
-
- /
- [
- η
-
- l
- ]
- wherein,
- [ηb] is the intrinsic viscosity of the polymer and [ηl] is the intrinsic viscosity of a reference linear polymer measured under the same solvent and temperature conditions, both having the same molecular weight (M), the molecular weight determined by GPC-MALS-DV.
35 more elements
A composition comprising a crosslinkable reaction product of a mixture, the mixture comprising:
- one or more monomer comprising a single polymerizable ethylenically unsaturated bond, wherein the one or more monomer is selected from the group consisting of (meth)acrylate, (meth)acrylamide, non-(meth)acrylate, and combinations thereof;
- one or more initiator;
- and
- a functional agent comprising two or more functional groups,
- wherein any one or more of the following statements (A) to (C) applies:
- (A) a weight average hydrodynamic radius of a molecule of the crosslinkable reaction product in tetrahydrofuran (THF) solution at 30° C. of less than about 30 nm at a weight average absolute molecular weight (Mw) of about 1,500,000 g/mol or less as determined by Gel Permeation Chromatography-Multi-Angle Light Scattering Detection-Differential Viscometry (GPC-MALS-DV);
- (B) an intrinsic viscosity of the crosslinkable reaction product in THE solution at 30° C. of about 1.0 dL/g or less at a weight average absolute molecular weight (Mw) of about 1,500,000 g/mol or less as determined by GPC-MALS-DV;
- and
- (C) the crosslinkable reaction product exhibits a post-polymerization melt viscosity within a range of from 90,000 cps to 7,000,000 cps at a shear rate of about 0.25 s−1 at a temperature of about 110° C. as measured a parallel-plate rheometer.
6 more elements
Dependencies are inferred from the claim text.