KR-102963249-B1 - COATING SOLUTION, METHOD FOR PRODUCING COATING FILM, AND COATING FILM

Abstract

The present invention relates to a coating solution comprising aerogel particles, a binder resin, a fibrous material having a fiber length of 1.5 mm or more, and a liquid medium.

Inventors

• 이즈미 히로유키
• 마키노 다쓰야
• 고타케 도모히코
• 다카야스 사토시
• 고구레 가이토

Assignees

• 가부시끼가이샤 레조낙

Dates

Publication Date

20260508

Application Date

20180416

Priority Date

20171004

Claims (6)

1. A coating solution comprising aerogel particles, a binder resin, a fibrous material having a fiber length of 1.5 mm or more, and a liquid medium, wherein the liquid medium comprises an organic solvent, the binder resin is a cellulose-based resin, and the content of the fibrous material is 5 parts by mass or more and 50 parts by mass or less per 100 parts by mass of the aerogel particles.
2. In paragraph 1, A coating in which the fiber length of the above fibrous material is 20 mm or less.
3. In paragraph 1, A coating solution having a content of 30 mass% or more of the fibrous material having a fiber length of 1.5 mm or more, based on the total mass of the fibrous material in the coating solution.
4. A method for manufacturing a coating film, comprising a process of removing the liquid medium from the coating solution described in any one of claims 1 to 3.
5. A coating film manufactured by the method of manufacturing a coating film of paragraph 4.
6. delete

Description

Coating Solution, Method for Producing Coating Film, and Coating Film The present invention relates to a coating liquid, a method for manufacturing a coating film, and a coating film. Aerogel is known as a material with excellent thermal insulation and transparency. A method has been proposed to process aerogel having such characteristics into a particle form and use it as a constituent material for thermal insulation (e.g., Patent Document 1). Patent Document 1 describes a method for manufacturing a thermal insulation material (molded body) by preparing an aqueous dispersion containing aerogel particles and organic fibers, and then press-molding an intermediate product obtained by evaporating water. Figure 1 is a diagram showing a method of applying a liquid onto an object using a soldering iron. Preferred embodiments of the present invention will be described in detail below. However, the present invention is not limited to the following embodiments. In this specification, numerical ranges indicated by "~" represent a range that includes the values described before and after "~" as minimum and maximum values, respectively. "A or B" may include either A or B, or both. Unless specifically limited, the materials exemplified in this embodiment may be used as a single type or in combination of two or more types. Aerogel In a narrow sense, a dried gel obtained by using a supercritical drying method with respect to a wet gel is called an aerogel, a dried gel obtained by drying under atmospheric pressure is called a xerogel, and a dried gel obtained by freeze-drying is called a cryogel, but in the present embodiment, a low-density dried gel obtained without following such drying methods of a wet gel is called an "aerogel." That is, in the present embodiment, "aerogel" refers to an aerogel in the broad sense, "a gel comprised of a microporous solid in which the dispersed phase is a gas." Generally, the interior of the aerogel has a mesh-like microstructure and a cluster structure in which particulate aerogel components of about 2 to 20 nm are bonded. Between the frameworks formed by these clusters, there are pores that do not reach 100 nm. Thus, the aerogel forms a three-dimensional fine porous structure. Furthermore, the aerogel according to the present embodiment is, for example, a silica aerogel with silica as the main component. As for the silica aerogel, there is, for example, a so-called organic-inorganic hybridized silica aerogel in which organic groups (such as methyl groups) or organic chains have been introduced. The following types may be examples of aerogels according to the present embodiment. By adopting these types, it becomes easy to obtain an aerogel with excellent thermal insulation, flame retardancy, heat resistance, and flexibility. By adopting each type, an aerogel having thermal insulation, flame retardancy, heat resistance, and flexibility according to each type can be obtained. (First Sun) The aerogel according to the present embodiment may have a structure represented by the following general formula (1). The aerogel according to the present embodiment may have a structure including the structure represented by formula (1), and may have a structure represented by the following general formula (1a). In formulas (1) and (1a), R1 and R2 each independently represent an alkyl group or an aryl group, and R3 and R4 each independently represent an alkylene group. Here, examples of aryl groups include phenyl groups, substituted phenyl groups, etc. Examples of substituents for substituted phenyl groups include alkyl groups, vinyl groups, mercapto groups, amino groups, nitro groups, cyano groups, etc. p represents an integer from 1 to 50. In formula (1a), two or more R1s may each be the same or different, and likewise, two or more R2s may each be the same or different. In formula (1a), two R3s may each be the same or different, and likewise, two R4s may each be the same or different. By introducing the structure represented by the above formula (1) or formula (1a) into the framework of the aerogel as an aerogel component, a flexible aerogel with low thermal conductivity is obtained. In this regard, among formulas (1) and (1a), R1 and R2 can each independently be exemplified by an alkyl group having 1 to 6 carbon atoms, a phenyl group, etc., and the alkyl group can be exemplified by a methyl group, etc. Additionally, among formulas (1) and (1a), R3 and R4 can each independently be exemplified by an alkylene group having 1 to 6 carbon atoms, etc., and the alkylene group can be exemplified by an ethylene group, a propylene group, etc. Among formulas (1a), p can be 2 to 30, or 5 to 20. (Second Sun) The aerogel according to the present embodiment has a ladder-type structure having struts and a crosslinking portion, and the crosslinking portion may have a structure represented by the following general formula (2). By introducing such a ladder-type structure into the framework of the aerogel as an aerogel c