Silicone-based coating composition and silicone-based release film comprising same

Patent metadata

Field	Value
Publication number	US-12234375-B2
Application number	US-202117797605-A
Country	US
Kind code	B2
Filing date	Aug 26, 2021
Priority date	Aug 31, 2020
Publication date	Feb 25, 2025
Grant date	Feb 25, 2025

Abstract

The present disclosure relates to a silicone-based coating composition, and a silicone-based release film including the same, wherein the silicone-based coating composition comprises a silicone-based compound represented by the following Chemical Formula 1 having a weight average molecular weight of greater than or equal to 25,000 g/mol and less than or equal to 70,000 g/mol:

wherein R 1 to R 3 and n are described herein.

First claim

The invention claimed is:

1. A silicone-based coating composition comprising:
a silicone-based resin;
a silicone-based crosslinking agent; and
a metal catalyst, and further comprising,
a silicone-based compound represented by Chemical Formula 2 having a weight average molecular weight of greater than or equal to 25,000 g/mol and less than or equal to 70,000 g/mol:

wherein, in Chemical Formula 2,
R 4 to R 10 are each independently hydrogen, a substituted or unsubstituted alkyl group or a substituted or unsubstituted cycloalkyl group; and
m is an integer of 1 to 1500.

2. The silicone-based coating composition of claim 1 , wherein the silicone-based resin is vinyl terminated polydimethylsiloxane.

3. The silicone-based coating composition of claim 1 , wherein R 4 to R 10 are each independently hydrogen or a substituted or unsubstituted alkyl group; and
m is an integer of 10 to 1000.

4. The silicone-based coating composition of claim 1 , which has a form of a liquid composition.

5. The silicone-based coating composition of claim 1 , further comprising:
an organic solvent;
wherein the silicone-based compound is included in greater than or equal to 4 parts by weight and less than or equal to 60 parts by weight with respect to 100 parts by weight of the organic solvent.

6. The silicone-based coating composition of claim 5 , wherein:
the silicone-based resin is included in 5 parts by weight to 30 parts by weight;
the silicone-based crosslinking agent is included in 0.05 parts by weight to 5 parts by weight;
the metal catalyst is included in 0.5 parts by weight to 10 parts by weight; and
the silicone-based compound is included in 4 parts by weight to 60 parts by weight,
with respect to 100 parts by weight of the organic solvent.

7. The silicone-based coating composition of claim 5 , wherein the organic solvent is any one of dimethylacetamide (DMAC), dimethylformamide (DMF), dimethyl sulfoxide (DMSO), tetrahydrofuran (THF) or acetone.

8. A silicone-based release film comprising:
a base layer; and
a coating layer that is a cured material of the silicone-based coating composition of claim 1 .

9. The silicone-based release film of claim 8 , wherein the coating layer has a thickness of 30 nm to 500 nm.

10. The silicone-based release film of claim 8 , wherein the base layer has a thickness of 10 μm to 500 μm.

11. The silicone-based release film of claim 8 , wherein the base layer includes one of a polyethylene resin, a polyethylene terephthalate resin, polyether ether ketone, paper or combinations thereof.

12. The silicone-based coating composition of claim 1 , wherein the silicone-based resin has a poly dispersity index (PDI) of 1 to 3.

13. The silicone-based coating composition of claim 1 , wherein the silicone-based resin has a weight average molecular weight of greater than or equal to 100,000 g/mol and less than or equal to 600,000 g/mol.

14. The silicone-based coating composition of claim 1 , wherein the metal catalyst comprises a platinum-based catalyst.

15. The silicone-based coating composition of claim 1 , wherein the silicone-based compound is represented by Chemical Formula 2-1,

wherein m is an integer of 600 to 1000.

Assignees

• Lg Chemical Ltd

Inventors

• Park Jun Hyoung
• Park Jun Beom
• Jung Jihye
• Seo Kwang Su

Classifications

• C08J7/04

  Coating · CPC title

• C08J5/18

  Manufacture of films or sheets · CPC title

• C08L83/04

  Polysiloxanes · CPC title

• C09D7/61

  inorganic · CPC title

• C09D7/20

  Diluents or solvents · CPC title