US-12617947-B2 - Flame-retardant flexible coating composition, flame-retardant product having flame-retardant flexible coating layer and method for manufacturing the same

Abstract

A first task of the invention is to provide a flame-retardant flexible coating composition for a coating layer applied onto a surface of a product to satisfy both high flame retardancy and high flexibility. In an effort to achieve the task, a first aspect of the invention may provide a flame-retardant coating composition including a siloxane binder containing at least any one of an epoxy group or a dimethyl group and a phenyl group, and a phosphorus-based flame retardant.

Inventors

• Chang Ho Lee
• Ki Hwan AN

Assignees

• AXEED INC.

Dates

Publication Date

20260505

Application Date

20230203

Priority Date

20220905

Claims (9)

1. 1 . A flame-retardant flexible coating composition comprising: a siloxane binder comprising an epoxy group, a dimethylsiloxane unit, a phenyl group, and a tetraethoxysilane-derived siloxane unit; and a phosphorus-based flame retardant, wherein the phosphorus-based flame retardant is added in a weight of 100 to 300% with respect to a solid weight of the siloxane binder, and wherein the siloxane binder is acidic.
2. 2 . The flame-retardant flexible coating composition according to claim 1 , wherein the siloxane binder further comprises a methylsiloxane unit.
3. 3 . The flame-retardant flexible coating composition according to claim 1 , wherein the siloxane binder comprises siloxane units derived from: a silane compound selected from the group consisting of phenylsilane, phenylmethylsilane, phenyltrimethoxysilane, phenyltriethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, diphenylsilanediol, triphenylsilanol, phenylmethyldimethoxysilane, phenylmethyldiethoxysilane, phenyltrichlorosilane, diphenyldichlorosilane, triphenylchlorosilane, phenylmethyldichlorosilane, and a combination thereof; a silane compound selected from the group consisting of 3-glycidoxypropyl trimethoxy silane, 3-glycidoxypropyl triethoxy silane, 3-glycidoxypropyl methyldimethoxy silane, 3-glycidoxypropylmethyldiethoxy silane, 2-(3,4-epoxycyclohexyl)ethyl trimethoxy silane, 2-(3,4-epoxycyclohexyl)ethyl triethoxy silane, and a combination thereof; a silane compound selected from the group consisting of dimethyldimethoxy silane, dimethyldiethoxy silane, and a combination thereof; and tetraethoxysilane.
4. 4 . The flame-retardant flexible coating composition according to claim 2 , wherein the methylsiloxane unit is derived from a silane compound selected from the group consisting of methyltrimethoxysilane, methyltriethoxysilane, and a combination thereof.
5. 5 . The flame-retardant flexible coating composition according to claim 1 , wherein the phosphorus-based flame retardant is a phosphoric acid ester compound.
6. 6 . The flame-retardant flexible coating composition according to claim 1 , wherein the siloxane binder has a pH of 3 to 6.
7. 7 . A flame-retardant product having a flame-retardant flexible coating layer which is formed by applying the flame-retardant coating composition according to claim 1 onto a surface and curing the applied composition.
8. 8 . The flame-retardant product according to claim 7 , wherein the flame-retardant product having the flame-retardant flexible coating layer is a film.
9. 9 . A method for manufacturing a flame-retardant product, the method comprising: (a) mixing a silane compound comprising an epoxy group, a dimethyl group, a phenyl group and tetraethoxysilane with a first solvent to prepare a silane solution; (b) heating the silane solution to prepare a first oligomer solution; (c) diluting the first oligomer solution with a second solvent to prepare a siloxane binder; (d) dissolving or mixing a phosphorus-based flame retardant in/with the siloxane binder in a weight of 100 to 300% with respect to a solid weight of the siloxane binder to prepare a coating composition; and (e) applying the coating composition onto an object and curing the applied composition either at room temperature or through hot air drying at 100° C. or less, wherein in the step (a), acid is added to make the silane solution acidic.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant product having excellent flame-retardant properties, a method for manufacturing the same, and a coating composition for forming the same, and more particularly, to a coating composition including a siloxane binder containing an epoxy group or a dimethyl group and a phenyl group, and a phosphorus-based flame retardant, and a flame-retardant product using the same, and a method for manufacturing the flame-retardant product. 2. Description of the Related Art The recent development of electric vehicles and the like has resulted in active technology development involving ensuring flame retardancy of various products. To make sure that products are provided with flame retardancy, a technique in which a flame-retardant coating composition is applied onto a surface of a product and cured is used. As for the flame-retardant coating composition, inorganic substances or inorganic compounds have been mainly used in combination with organic binders to date. In particular, a binder using an organic material is required to be used for maintaining flexibility as being applied onto a surface of a flexible film and increasing flame retardancy. However, the use of such a binder still makes it difficult to achieve excellent flame retardancy. In addition, curing conditions are required to be maintained at high temperature, and thus there are a number of restrictions on suitable products, and in particular, it is hard to directly apply to flexible films. SUMMARY OF THE INVENTION A task of the invention is to provide a flame-retardant flexible coating composition for a coating layer applied onto a surface of a product to satisfy both high flame retardancy and high flexibility. Another task of the invention is to provide a flame-retardant product having a coating layer with excellent flame retardancy and flexibility. Another task of the invention is to provide a method for manufacturing a flame-retardant product having a coating layer with excellent flame retardancy and flexibility. In an effort to achieve the tasks, according to a first aspect of the invention, there is provided a flame-retardant flexible coating composition including a siloxane binder containing at least any one of an epoxy group or a dimethyl group and a phenyl group, and a phosphorus-based flame retardant. In addition, in the flame-retardant flexible coating composition according to the first aspect of the invention, the siloxane binder may further include a methyl group. In addition, in the flame-retardant flexible coating composition according to the first aspect of the invention, the siloxane binder may be formed through a combination of a silane compound selected from the group consisting of phenylsilane, phenylmethylsilane, phenyltrimethoxysilane, phenyltriethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, diphenylsilanediol, triphenylsilanol, phenylmethyldimethoxysilane, phenylmethyldiethoxysilane, phenyltrichlorosilane, diphenyldichlorosilane, triphenylchlorosilane, phenylmethyldichlorosilane, and a combination thereof, and a silane compound selected from the group consisting of 3-glycidoxypropyl trimethoxy silane, 3-glycidoxypropyl triethoxy silane, 3-glycidoxypropyl methyldimethoxy silane, 3-glycidoxypropylmethyldiethoxy silane, 2-(3,4-epoxycyclohexyl)ethyl trimethoxy silane, 2-(3,4-epoxycyclohexyl)ethyl triethoxy silane, dimethyldimethoxy silane, dimethyldiethoxy silane, and a combination thereof. In addition, in the flame-retardant flexible coating composition according to the first aspect of the invention, the phosphorus-based flame retardant may be a phosphoric acid ester compound. In addition, in the flame-retardant flexible coating composition according to the first aspect of the invention, the siloxane binder containing the methyl group may be formed by further including either or both methyltrimethoxysilane or/and methyltriethoxysilane. In addition, in the flame-retardant flexible coating composition according to the first aspect of the invention, the siloxane binder may be formed by further including tetraethoxysilane. In addition, in the flame-retardant flexible coating composition according to the first aspect of the invention, the phosphorus-based flame retardant may be added in a weight of 100 to 300% with respect to a solid weight of the siloxane binder. In addition, in the flame-retardant flexible coating composition according to the first aspect of the invention, the siloxane binder may be acidic. In addition, in the flame-retardant flexible coating composition according to the first aspect of the invention, the siloxane binder may have a pH of 3 to 6. According to a second aspect of the invention, there is provided a flame-retardant product formed by applying and curing the coating composition according to any one of the first aspect. In addition, in the flame-retardant product according to the second aspect of the inve