BOPP laser aluminized film transfer water-based back coating and preparation method thereof

Abstract

The invention provides a waterborne back-coating paint for transferring of a BOPP laser aluminized film and a preparation method thereof. The paint comprises, by weight, 8 to 15% of aminated modified lignin resin, 5 to 10% of silicon-modified polyvinyl alcohol, 8 to 15% of acrylate emulsion, 0.05 to 0.1% of a wetting agent, 0.05 to 0.1% of an antifoaming agent, 0.01 to 0.05% of waterborne wax and 60 to 73% of water. The waterborne back-coating paint prepared in the invention has the beneficial effects that lignin is widely available and treated as waste, so cost for the paint is low and environment is protected since the waste is recycled; the paint has good film forming ability, and a film forming substance has great trailing; the paint well bonds with aluminum and can be thoroughly peeled, and peeling force is small; the paint has good temperature tolerance; and the paint is environment-friendly, safe and low in VOC residual quantity.

Description

technical field

[0001] The invention relates to a water-based back-coating paint, in particular to a water-based back-coating paint for transferring a BOPP laser aluminized film and a preparation method thereof. Background technique

[0002] At present, the back coating coating for BOPP laser aluminized film transfer is mainly divided into three systems: the first is a solvent-based system based on vinyl chloride and acrylic resin, which is widely used because of its good peeling effect, but it contains a large amount of acetic acid Solvents such as ethyl ester, methyl ethyl ketone, and ethers have brought great harm to the environment and the health of users, and there is a risk of halogen residues in the use of vinyl acetate resins. In addition, the solvent system does not adhere well to water-based glue, and most of them use solvent-free adhesives. Compounding and dry compounding. The second is an alcohol-soluble system based on PVB, but its adhesion to the glue is not i...

Examples

Embodiment 1

[0032] The present embodiment coating adopts the raw material of following component and content to prepare:

[0033]

[0034] The above-mentioned BOPP laser aluminized film transfer water-based back coating is prepared according to the following process steps:

[0035] Add 142.8 kg of water into the stirring tank, start stirring, the speed is 800 rpm, and the temperature is heated to 80°C, then add 10 kg of silicon-modified polyvinyl alcohol to dissolve completely, and then sequentially add 16 kg of aminated modified lignin resin 1. Mix 30 kg of acrylic acid for 10 minutes, then add 0.1 kg of wetting agent, 0.1 kg of defoamer and 1 kg of water wax, increase the stirring speed to 1200 rpm, and stir for 30 minutes to obtain the finished product.

Embodiment 2

[0037] The present embodiment coating adopts the raw material of following component and content to prepare:

[0038]

[0039] Add 143.4 kg of water into the stirring tank, start stirring at 800 rpm, heat to 80°C, add 12 kg of silicon-modified polyvinyl alcohol to dissolve completely, and then sequentially add 18 kg of aminated modified lignin resin 1. 26 kg of acrylic acid, mixed for 10 minutes, then added 0.1 kg of wetting agent, 0.1 kg of defoamer and 0.4 kg of water wax, the stirring speed was increased to 1200 rpm, and the finished product could be obtained after stirring for 30 minutes.

Embodiment 3

[0041] The present embodiment coating adopts the raw material of following component and content to prepare:

[0042]

[0043] Add 139.2 kg of water into the stirring tank, start stirring, the speed is 800 rpm, and the temperature is heated to 80°C, then add 16 kg of silicon-modified polyvinyl alcohol to dissolve completely, and then sequentially add 22 kg of aminated modified lignin resin 1. 22 kilograms of acrylic acid, mixed for 10 minutes, then added 0.1 kilogram of wetting agent, 0.1 kilogram of defoamer and 0.6 kilogram of water wax, the stirring speed was increased to 1200 rpm, and the finished product could be obtained after stirring for 30 minutes.

technical field

[0001] The invention relates to a water-based back-coating paint, in particular to a water-based back-coating paint for transferring a BOPP laser aluminized film and a preparation method thereof. Background technique

[0002] At present, the back coating coating for BOPP laser aluminized film transfer is mainly divided into three systems: the first is a solvent-based system based on vinyl chloride and acrylic resin, which is widely used because of its good peeling effect, but it contains a large amount of acetic acid Solvents such as ethyl ester, methyl ethyl ketone, and ethers have brought great harm to the environment and the health of users, and there is a risk of halogen residues in the use of vinyl acetate resins. In addition, the solvent system does not adhere well to water-based glue, and most of them use solvent-free adhesives. Compounding and dry compounding. The second is an alcohol-soluble system based on PVB, but its adhesion to the glue is not i...

Examples

Embodiment 1

[0032] The present embodiment coating adopts the raw material of following component and content to prepare:

[0033]

[0034] The above-mentioned BOPP laser aluminized film transfer water-based back coating is prepared according to the following process steps:

[0035] Add 142.8 kg of water into the stirring tank, start stirring, the speed is 800 rpm, and the temperature is heated to 80°C, then add 10 kg of silicon-modified polyvinyl alcohol to dissolve completely, and then sequentially add 16 kg of aminated modified lignin resin 1. Mix 30 kg of acrylic acid for 10 minutes, then add 0.1 kg of wetting agent, 0.1 kg of defoamer and 1 kg of water wax, increase the stirring speed to 1200 rpm, and stir for 30 minutes to obtain the finished product.

Embodiment 2

[0037] The present embodiment coating adopts the raw material of following component and content to prepare:

[0038]

[0039] Add 143.4 kg of water into the stirring tank, start stirring at 800 rpm, heat to 80°C, add 12 kg of silicon-modified polyvinyl alcohol to dissolve completely, and then sequentially add 18 kg of aminated modified lignin resin 1. 26 kg of acrylic acid, mixed for 10 minutes, then added 0.1 kg of wetting agent, 0.1 kg of defoamer and 0.4 kg of water wax, the stirring speed was increased to 1200 rpm, and the finished product could be obtained after stirring for 30 minutes.

Embodiment 3

[0041] The present embodiment coating adopts the raw material of following component and content to prepare:

[0042]

[0043] Add 139.2 kg of water into the stirring tank, start stirring, the speed is 800 rpm, and the temperature is heated to 80°C, then add 16 kg of silicon-modified polyvinyl alcohol to dissolve completely, and then sequentially add 22 kg of aminated modified lignin resin 1. 22 kilograms of acrylic acid, mixed for 10 minutes, then added 0.1 kilogram of wetting agent, 0.1 kilogram of defoamer and 0.6 kilogram of water wax, the stirring speed was increased to 1200 rpm, and the finished product could be obtained after stirring for 30 minutes.

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