Curable compositions comprising polyol component, functional butadiene component, and thermally conductive filler, articles therefrom, and methods of making and using same

Patent metadata

Field	Value
Publication number	US-12199255-B2
Application number	US-201917294012-A
Country	US
Kind code	B2
Filing date	Nov 15, 2019
Priority date	Nov 16, 2018
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

A curable composition includes a polyol component comprising one or more polyols: a functional butadiene component; and a thermally conductive filler. The thermally conductive filler is present in an amount of at least 20 wt. %, based on the total weight of the curable composition. The curable composition has, upon curing, a thermal conductivity of at least 0.5 W/(mK).

First claim

What is claimed:

1. A curable composition comprising:
a polyol component comprising one or more polyols;
a functional butadiene component;
a resin comprising an epoxidized vegetable oil, epoxided fatty acid ester, epoxided alpha olefin, or epoxidized polybutene; and
a thermally conductive filler, the thermally conductive filler being present in an amount of at least 20 wt. %, based on the total weight of the curable composition;
wherein the functional butadiene component comprises malenized polyalkyldienes, maleated liquid rubber, maleated liquid isoprene, liquid polyfarnescene, maleated styrene-butadiene rubber, or a combination thereof,
wherein the curable composition has, upon curing, a thermal conductivity of at least 0.5 W/(mK).

2. The curable composition of claim 1 ,
wherein the resin is capable of reacting with an acid of an acid/ester formed when an alcohol group of the polyols react with the functional butadiene component.

3. The curable composition of claim 1 , wherein the polyol component further comprises one or more monofunctional alcohols.

4. The curable composition of claim 1 , wherein the one or more polyols of the polyol component comprise a polyol having a number average molecular weight of between 100 and 3000 g/mol.

5. The curable composition of claim 1 , wherein the one or more polyols, collectively, are present in the curable composition in an amount of between 0.5 and 30 wt. %, based on the total weight of the curable composition.

6. The curable composition of claim 1 , wherein the thermally conductive fillers comprise aluminum trihydroxide.

7. The curable composition of claim 1 , wherein the thermally conductive filler is present in an amount of at least 70 wt. %, based on the total weight of the curable composition.

8. The curable composition of claim 1 , further comprising an amine catalyst.

9. The curable composition of claim 1 , wherein the curable composition provides, upon curing, a flame retardancy of at least UL94-HB.

10. The curable composition of claim 1 , wherein the curable composition provides, upon curing, an elongation at break of at least 5%, an overlap shear strength on a bare aluminum substrate ranging from 0.1-30 N/mm 2 , a tensile strength ranging from 0.5-30 N/mm 2 , and a peel strength of at least 0.01 N/mm on an aluminum substrate.

11. The curable composition of claim 1 , wherein the curable composition, within 10 minutes of mixing the polyol component, functional butadiene component, and thermally conductive filler, has a viscosity measured at room temperature of from 100 to 50000 poise.

12. The curable composition of claim 1 , wherein the thermal conductivity of the curable composition, upon curing is at least 1 W/(m*K).

13. An article comprising a cured composition, wherein the cured composition is a reaction product of the curable composition according to claim 1 .

14. The article of claim 13 , further comprising a substrate having a surface, wherein the cured composition is disposed on the surface of the substrate.

15. The article of claim 14 , wherein the substrate is a metal substrate.

16. An article comprising a first substrate, a second substrate and a cured composition disposed between and adhering the first substrate to the second substrate, wherein the cured composition is a reaction product of the curable composition according to claim 1 .

17. A battery module comprising a plurality of battery cells connected to a first base plate by a first layer of a curable composition according to claim 1 .

18. A method of making a battery module comprising:
applying a first layer of a curable composition according to claim 1 to a first surface of a first base plate,
attaching a plurality of battery cells to the first layer to connect the battery cells to the first base plate, and
curing the curable composition.

Assignees

• 3M Innovative Properties Company

Inventors

• Ganapatibhotla Lalitha V N R
• Kropp Michael A

Classifications

• C09K5/14

  Solid materials, e.g. powdery or granular · CPC title

• C09J2415/00

  Presence of rubber derivatives · CPC title

• C09J2400/166

  in the pretreated surface to be joined · CPC title

• C09J115/00

  Adhesives based on rubber derivatives (C09J111/00, C09J113/00 take precedence) · CPC title

• C09J11/04

  inorganic · CPC title