RESIN AQUEOUS DISPERSION COMPOSITION

Abstract

The present invention provides an ethylene/glycidyl acrylate copolymer aqueous dispersion composition ensuring an obtained film (e.g., coating film) with excellent adhesion, and high stability of the film itself.

Specifically, the present invention provides an ethylene/glycidyl acrylate copolymer aqueous dispersion composition, comprising: (A) an ethylene/glycidyl acrylate copolymer, (B1) an ethylene oxide/propylene oxide copolymer, (B2) a polyoxyalkylene-based non-ionic surfactant, (C) an alkali-soluble acrylic resin emulsion, and (D) a basic substance, wherein (B1) and (B2) are present in a total amount of 5 to 15 parts by mass, and (C) is present in an amount of 0.1 to 50 parts by mass per 100 parts by mass of (A), and (D) is present in an amount of 0.01 to 0.2 parts by mass per part by mass of (C).

Claims

1. An ethylene/glycidyl acrylate copolymer aqueous dispersion composition, comprising: (A) an ethylene/glycidyl acrylate copolymer, (B1) an ethylene oxide/propylene oxide copolymer, (B2) a polyoxyalkylene-based non-ionic surfactant, (C) an alkali-soluble acrylic resin emulsion, and (D) a basic substance, wherein (B1) and (B2) are present in a total amount of 5 to 15 parts by mass, and (C) is present in an amount of 0.1 to 50 parts by mass per 100 parts by mass of (A), and (D) is present in an amount of 0.01 to 0.2 parts by mass per part by mass of (C).

2. The composition according to claim 1, wherein (A) is at least one member selected from the group consisting of ethylene/glycidyl acrylate copolymers, ethylene/glycidyl methacrylate copolymers, ethylene/glycidyl methacrylate/methyl acrylate copolymers, and ethylene/glycidyl methacrylate/vinyl acetate copolymers.

3. The composition according to claim 1, wherein (B2) is at least one member selected from the group consisting of polyoxyethylene oleyl ethers, polyoxyethylene lauryl ethers, polyoxyethylene tridecyl ethers, polyoxyethylene styrenated phenyl ethers, and polyoxyethylene nonyl phenyl ethers.

4. The composition according to claim 1, wherein (D) is an alkali metal hydroxide.

5. The composition according to claim 2, wherein (B2) is at least one member selected from the group consisting of polyoxyethylene oleyl ethers, polyoxyethylene lauryl ethers, polyoxyethylene tridecyl ethers, polyoxyethylene styrenated phenyl ethers, and polyoxyethylene nonyl phenyl ethers.

6. The composition according to claim 2, wherein (D) is an alkali metal hydroxide.

7. The composition according to claim 3, wherein (D) is an alkali metal hydroxide.

Description

EXAMPLES

[0047] Embodiments of the present disclosure are explained with reference to Examples; however, the embodiments of the present disclosure are not limited to the following examples.

Example 1

[0048] 160 g of an ethylene/glycidyl methacrylate copolymer (ethylene content: 80 wt %, trade name of Sumitomo Chemical Corporation; Bondfast CG5001), 12.8 g of an ethylene oxide/propylene oxide copolymer (weight average molecular weight: 16500, trade name of Sanyo Chemical Industries Ltd; Newpol PE-128), 3.2 g of polyoxyethylene oleyl ether, and 264 g of pure water were placed in a 1-L autoclave vessel, followed by sealing. Subsequently, a stirrer was started, and the temperature in the autoclave was raised to 180° C. while stirring the content at 500 rpm. While the internal temperature was kept at 180° C., stirring was further performed for 15 min. Thereafter, the contents were cooled to 50° C. under stirring to obtain a mixture. 0.68 g of an alkali-soluble acrylic resin emulsion (solids content: 23.6%, trade name of DIC Corporation; Voncoat 3750-E) and 0.032 g of NaOH were mixed with the obtained mixture, followed by stirring for 15 minutes to obtain an ethylene/glycidyl acrylate copolymer aqueous dispersion.

[0049] The ethylene/glycidyl methacrylate copolymer (Bondfast CG5001) used has a melt flow rate (kg/m.sup.3) value of 380 measured according to JISK7210 (190° C., 21.2 N load).

Example 2

[0050] The same procedure as in Example 1 was performed, except that 6.8 g of an alkali-soluble acrylic resin emulsion and 0.16 g of NaOH were used to obtain an ethylene/glycidyl acrylate copolymer aqueous dispersion.

Example 3

[0051] The same procedure as in Example 1 was performed, except that 6.8 g of an alkali-soluble acrylic resin emulsion and 0.8 g of NaOH were used to obtain an ethylene/glycidyl acrylate copolymer aqueous dispersion.

Example 4

[0052] The same procedure as in Example 1 was performed, except that 34 g of an alkali-soluble acrylic resin emulsion and 1.6 g of NaOH were used to obtain an ethylene/glycidyl acrylate copolymer aqueous dispersion.

Comparative Example 1

[0053] The same procedure as in Example 1 was performed, except that an alkali-soluble acrylic resin emulsion and NaOH were not added to obtain an ethylene/glycidyl acrylate copolymer aqueous dispersion.

Comparative Example 2

[0054] The same procedure as in Example 1 was performed, except that NaOH was not added and 0.68 g of the alkali-soluble acrylic resin emulsion was used, to obtain an ethylene/glycidyl acrylate copolymer aqueous dispersion.

Comparative Example 3

[0055] The same procedure as in Example 1 was performed, except that 0.68 g of the alkali-soluble acrylic resin emulsion and 0.16 g of NaOH were used to obtain an ethylene/glycidyl acrylate copolymer aqueous dispersion.

Comparative Example 4

[0056] The same procedure as in Example 1 was performed, except that 6.8 g of the alkali-soluble acrylic resin emulsion and 0.032 g of NaOH were used to obtain an ethylene/glycidyl acrylate copolymer aqueous dispersion.

Comparative Example 5

[0057] The same procedure as in Example 1 was performed, except that 34 g of the alkali-soluble acrylic resin emulsion and 0.32 g of NaOH were used to obtain an ethylene/glycidyl acrylate copolymer aqueous dispersion.

[0058] The adhesion and appearance of the ethylene/glycidyl acrylate copolymer aqueous dispersion obtained in the Examples and Comparative Examples were evaluated according to the following method. Table 1 shows the obtained results.

[0059] 0.2 g of an aminosilane coupling agent (3-aminopropyltriethoxysilane) was added to 100 g of each of the ethylene/glycidyl acrylate copolymer aqueous dispersions obtained in the Examples and the Comparative Examples, followed by stirring and mixing for 30 minutes. A coating having a film thickness of about 4 μm after drying was then applied to a glass plate (thickness: 2 mm) using a coating machine (trade name of Nippon Cedars Service Co., Ltd., Bar coater No. 4) so that the thickness of the coating film after drying was about 4 μm. The film was then heated and dried in an oven at 150° C. for 5 min. The presence or absence of cracks in the appearance of the obtained film was visually confirmed. Cellophane tape was applied to the coating film after a scratch was made in a grid pattern with 5 mm spacing according to JIS K5400 (Cross-Cut Tape Peeling Test). One to two minutes after the cellophane tape was adhered, one end of the tape was held and peeled at a right angle, followed by an adhesiveness evaluation. The following shows the appearance and adhesion evaluation criteria.

Appearance Evaluation

[0060] o: No cracks

[0061] x: Cracks

Adhesion Evaluation

[0062] o: Area in which a coating film was peeled off was less than 5%.

[0063] x: Area in which a coating film was peeled off was 5% or more.

TABLE-US-00001 TABLE 1 Appearance Adhesion Example 1 ◯ ◯ Example 2 ◯ ◯ Example 3 ◯ ◯ Example 4 ◯ ◯ Comparative Example 1 X X Comparative Example 2 ◯ X Comparative Example 3 X ◯ Comparative Example 4 ◯ X Comparative Example 5 ◯ X