Article and method of making the same

Patent metadata

Field	Value
Publication number	US-12466162-B2
Application number	US-202218252208-A
Country	US
Kind code	B2
Filing date	Jan 7, 2022
Priority date	Jan 22, 2021
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

An article comprises a substrate having a first portion comprising at least one of a metal or a ceramic metal oxide. A composite foam is bonded to the metal or ceramic metal oxide. The composite foam comprises: at least one polymer preparable by ring-opening metathesis polymerization; at least one catalyst for the ring-opening metathesis polymerization; at least one difunctional coupling agent represented by Z—X—Z. Each Z independently represents a group that is chemically reactive with at least one of the chemically bound surface hydroxyl groups thereby forming at least one covalent bond. Each X independently represents a divalent organic linking group having a number average molecular weight of 500 to 10000 grams per mole; and at least one of hollow glass microspheres or expanded polymeric microspheres. A method of making the article is also disclosed.

First claim

What is claimed is:

1 . An article comprising
a first substrate having a first portion comprising a first metal or ceramic metal oxide comprising surface hydroxyl groups; and a composite foam bonded to the at least one of the first metal, the composite foam comprising:
at least one polymer preparable by ring-opening metathesis polymerization of at least one cyclic olefin;
at least one catalyst for the ring-opening metathesis polymerization;
at least one difunctional coupling agent represented by
Z—X—Z

wherein each Z independently represents a group that is chemically reactive with the surface hydroxyl groups thereby forming at least one covalent bond, and
wherein X independently represents a divalent organic linking group have a number average molecular weight of 500 to 10000 grams per mole; and
at least one of hollow glass microspheres or expanded polymeric microspheres.

2 . The article of claim 1 , wherein each X independently represents a divalent organic linking group have a number average molecular weight of 600 to 6000 grams per mole.

3 . The article of claim 1 , wherein the at least one polymer preparable by ring-opening metathesis polymerization of at least one cyclic olefin comprising at least one of dicyclopentadiene, norbornene, ethylidenenorbornene, cyclopentene, cyclooctene, tricyclopentadiene, tetracyclopentadiene, norbornadiene, 7-oxabicyclo[2.2.1]hept-2-ene, tetracyclo[6.2.13.6.0]dodeca-4,9-diene, hexylnorbornylene, cyclopentadiene, alkyl norbornene, or an oligomer thereof.

4 . The article of claim 1 , wherein the at least one catalyst for the ring-opening metathesis polymerization comprises at least one of a ruthenium, tungsten, osmium, or molybdenum ring-opening metathesis polymerization catalyst.

5 . The article of claim 1 , wherein each Z is —N═C═O.

6 . The article of claim 1 , wherein the at least one difunctional coupling agent comprises an isocyanate-terminated polyurethane prepolymer of 4,4′-diphenylmethane and a polyalkylene glycol.

7 . The article of claim 1 , wherein the at least one difunctional coupling agent comprises a diphenylmethane diisocyanate-terminated polyether prepolymer based on polytetramethylene ether glycol.

8 . The article of any of claim 1 , wherein each X independently comprises a polyoxyalkylene segment.

9 . The article of claim 1 , wherein each X independently comprises at least one of a polyethylene oxide segment, a polypropylene oxide segment, or a polybutylene oxide segment.

10 . The article of claim 1 , wherein each X independently comprises a polybutadiene segment.

11 . The article of claim 1 , wherein Z is —SiR6aL2(3-a), wherein L2 represents a hydrolyzable group, wherein R6 represents an alkyl group having from 1 to 4 carbon atoms, and wherein a is 0, 1, or 2.

12 . The article of claim 1 , wherein the composite foam comprises the hollow glass microspheres.

13 . The article of claim 1 , wherein the composite foam comprises the expanded polymeric microspheres.

14 . The article of claim 1 , wherein the composite foam has a dielectric constant of less than or equal to 2.5 and a tan delta of less than 0.02.

15 . The article of claim 1 , wherein the first portion comprises at least one of copper, silver, or aluminum.

16 . The article of claim 1 , wherein the first portion comprises the first ceramic metal oxide.

17 . The article of claim 1 , further comprising a second substrate having a second portion comprising at least one of a second metal or a second ceramic metal oxide, wherein the composite foam is further in contact with the second portion.

18 . The article of claim 17 , wherein the second portion comprises the second metal.

19 . The article of claim 1 , wherein the article comprises an electronic device.

20 . The article of claim 1 wherein the first portion comprises copper or aluminum.

Assignees

• 3M Innovative Properties Company

Inventors

• Perez Mario A
• Lin Binhong
• Kalish Jeffrey P
• Townsend Erik M

Classifications

• C09J2475/00

  Presence of polyurethane · CPC title

• C09J2423/00

  Presence of polyolefin · CPC title

• C09J2400/166

  in the pretreated surface to be joined · CPC title

• C09J2400/126

  in the pretreated surface to be joined · CPC title

• C09J2203/326

  for bonding electronic components such as wafers, chips or semiconductors · CPC title