Resin composition

Patent metadata

Field	Value
Publication number	US-11866542-B2
Application number	US-201916646816-A
Country	US
Kind code	B2
Filing date	Mar 19, 2019
Priority date	Mar 28, 2018
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

Abstract

The present application relates to a composition, a battery module and a battery pack. According to one example of the present application, there is provided a urethane-based heat dissipation material capable of providing excellent thermal conductivity and storage stability.

First claim

The invention claimed is:

1. A urethane-based composition comprising:
a main composition part comprising an ester-based polyol resin;
a curing agent composition part comprising a polyisocyanate;
a filler; and
a moisture scavenger,
wherein the ester-based polyol resin is an amorphous polyol or a crystalline polyol,
wherein the amorphous polyol does not have a crystallization temperature (Tc) or a melting temperature (Tm) in a DSC (differential scanning calorimetry) analysis performed at a rate of 10° C./minute within a range of −80° C. to 60° C.,
wherein the crystalline polyol has a melting temperature (Tm) of −5° C. or lower,
wherein the filler is contained in an amount of 100 to 2,000 parts by weight relative to 100 parts by weight of the sum of the ester-based polyol resin and polyisocyanate,
wherein the curing agent composition part comprises the filler and the moisture scavenger, and
wherein the ester-based polyol resin is represented by the following formula 1 or 2:

wherein, X is a carboxylic acid-derived unit, Y is a polyol-derived unit, n is a number within a range of 2 to 10, and m is a number within a range of 1 to 10.

2. The urethane-based composition according to claim 1 , wherein the filler and the moisture scavenger are further included in the main composition part.

3. The urethane-based composition according to claim 1 , wherein the filler comprises alumina, AlN (aluminum nitride), BN (boron nitride), silicon nitride, SiC, or BeO.

4. The urethane-based composition according to claim 1 , wherein the filler is contained in an amount of 150 to 2,000 parts by weight relative to 100 parts by weight of the sum of the ester-based polyol resin and polyisocyanate.

5. The urethane-based composition according to claim 1 , wherein the moisture scavenger is selected from methyldiphenylethoxysilane, molecular sieves, p-toluenesulfonyl isocyanate (PTSI), an acid anhydride ester, a silane compound represented by the following formula, and a mixture thereof:
R 1 SiR 2 (n) R 3 (3-n)   [Formula]

wherein, R 1 is a functional group having an inter-carbon double bond bonded to the silicon atom, R 2 and R 3 each independently represent a hydroxyl group, halogen, an amine group or —R 4 R 5 , which is bonded to the silicon atom, where R 4 is an oxygen or sulfur atom, and R 5 is an alkyl group, an aryl group, an aralkyl group, an acyl group or —R 6 R 7 , where R 6 is an alkylene group or an alkylidene group, and R 7 is an alkoxy group.

6. The urethane-based composition according to claim 5 , wherein the silane compound comprises vinyltrimethoxysilane, vinyltriethoxysilane, vinyltripropoxysilane, vinyltriisopropoxysilane, vinyltributoxysilane, vinyltripentoxysilane, vinyltriphenoxysilane, vinyltriacetoxysilane, or vinyltris(2-methoxyethoxy)silane.

7. The urethane-based composition according to claim 1 , wherein a cured product of a mixture of the ester-based polyol resin and polyisocyanate has a glass transition temperature (Tg) of less than 0° C.

8. The urethane-based composition according to claim 1 , wherein each of the ester-based polyol resin and the polyisocyanate has a viscosity of less than 900 cP.

9. The urethane-based composition according to claim 1 ,
wherein, in Formula 1, X is a carboxylic acid-derived unit selected from the group consisting of a phthalic acid unit, an isophthalic acid unit, a terephthalic acid unit, a trimellitic acid unit, a tetrahydrophthalic acid unit, a hexahydrophthalic acid unit, a tetrachlorophthalic acid unit, an oxalic acid unit, an azelaic acid unit, a sebacic acid unit, a succinic acid unit, a malic acid unit, a glutaric acid unit, a malonic acid unit, a pimelic acid unit, a suberic acid unit, a 2,2-dimethylsuccinic acid unit, a 3,3-dimethylglutaric acid unit, a 2,2-dimethylglutaric acid unit, a maleic acid unit, a fumaric acid unit, an itaconic acid unit and a fatty acid unit.

10. The urethane-based composition according to claim 9 , wherein the polyol-derived unit Y is any one or two or more units selected from the group consisting of an ethylene glycol unit, a propylene glycol unit, a 1,2-butylene glycol unit, a 2,3-butylene glycol unit, a 1,3-propanediol unit, a 1,3-butanediol unit, a 1,4-butanediol unit, a 1,6-hexanediol unit, a neopentyl glycol unit, a 1,2-ethylhexyldiol unit, a 1,5-pentanediol unit, a 1,9-nonanediol unit, a 1,10-decanediol unit, a 1,3-cyclohexanedimethanol unit, a 1,4-cyclohexanedimethanol unit, a glycerin unit and a trimethylolpropane unit.

11. The urethane-based composition according to claim 1 , wherein the polyisocyanate is a non-aromatic polyisocyanate.

12. A battery module comprising a module case having a top plate, a bottom plate and sidewalls, wherein an inner space is formed by the top plate, the bottom plate, and the sidewalls;
a plurality of battery cells existing in the inner space of the module case; and
a resin layer formed by curing the urethane-based composition according to claim 1 and in contact with the plurality of battery cells.

13. A battery pack comprising one or more battery modules according to claim 12 .

14. An automobile comprising the battery module according to claim 12 .

15. The urethane-based composition according to claim 1 , wherein the moisture scavenger is included in the curing agent composition part.

16. The urethane-based composition according to claim 15 , wherein the moisture scavenger is included in an amount of about 5 wt % or less based on 100 parts by weight of the curing agent composition part.

17. A method of manufacturing a battery module, comprising injecting the urethane-based composition according to claim 1 into a module case; housing a battery cell in the module case, and curing the urethane-based composition to form the resin layer.

18. The method of manufacturing battery module according to claim 17 , wherein the curing of the urethane-based composition is performed by holding the resin composition at room temperature or heating at a temperature in a range of about 30° C. to 50° C. for a predetermined time.

Assignees

• Lg Chemical Ltd

Inventors

• Park Sang Min
• Yang Se Woo
• Cho Yoon Gyung
• Kang Yang Gu
• Park Eun Suk
• Kim Hyun Suk
• Park Hyoung Sook
• Yang Young Jo

Classifications

• C08G18/4233 Primary

  derived from polymerised higher fatty acids or alcohols · CPC title

• B60R16/04

  Arrangement of batteries · CPC title

• C08G18/246

  containing also tin-carbon bonds · CPC title

• C08K3/22

  of metals · CPC title

• H01M50/211

  adapted for pouch cells · CPC title