Preparing method for paint rheolytic moisture holding regulator

Abstract

The invention belongs to the field of papermaking additives and relates to a regulator, in particular to a preparing method for a paint rheolytic moisture holding regulator.According to the rheolytic moisture holding regulator related in the method, hydrophobic groups are introduced on molecules of a common polymer and are associated, and meanwhile the hydrophobic groups can also adsorb emulsion particles and pigment particles.A net structure formed by associating the molecules is firm, and good paint thickening and moisture holding performance is achieved.

Description

technical field

[0001] The invention belongs to the field of papermaking auxiliary agents, relates to regulators, in particular to a preparation method of a coating rheology water retention regulator. Background technique

[0002] Water retention is an important basic property of coatings, which has an important impact on coating running performance. For coatings with poor water retention, the moisture in the coating transfers too quickly to the base paper. Under the action of pressure, the moisture is easily released from the coating, which causes the coated filter cake to thicken and solidify quickly before entering the scraper nip. As a result, serious scratches appear; the adhesive in the coating also migrates into the base paper with the absorption of water, thereby reducing the surface strength of the coating, resulting in powder falling and delamination of the coated paper during printing. This problem is aggravated when the base paper has high absorbency and air per...

Examples

preparation example Construction

[0078] The salient features of the present invention will be described below from the specific preparation method of the paint rheology water retention modifier and the specific application of the paint rheology water retention modifier prepared by the preparation method of the present invention in coating.

[0079] 1. Preparation method of paint rheology water retention modifier

Embodiment 1

[0081] 100 parts of hydrophilic monomer + hydrophobic monomer

[0082] Surfactant 8 parts

[0083] Initiator 0.01 part

[0084] 0.01 parts of crosslinking agent

[0085] Emulsifier 0.1 parts

[0086] 250 parts of water

[0087] in:

[0088] Based on the weight of the monomer mixture as 100%, the hydrophilic monomer accounts for 30%, and the hydrophobic monomer accounts for 70%.

[0089] Hydrophilic monomer: acrylic acid: methacrylic acid: itaconic acid is 5:4:1;

[0090] Hydrophobic monomer: one or more of butyl acrylate, hydroxyethyl methacrylate, methyl methacrylate, 2-methyl methacrylate and 2-ethyl methacrylate;

[0091] Surfactant: modified functional monomer containing hydrophobic groups, behenyl alcohol polyoxyethylene ether methacrylate;

[0092] Initiator: ammonium persulfate

[0093] Cross-linking agent: diallyl phthalate

[0094] Emulsifier: sodium methacrylate hydroxypropyl sulfonate

[0095] Specifically include the following steps:

[0096] a. Add wate...

Embodiment 2

[0102] 100 parts of hydrophilic monomer + hydrophobic monomer

[0103] Surfactant 12 parts

[0104] Initiator 0.02 parts

[0105] 0.02 parts of crosslinking agent

[0106] 0.2 parts of emulsifier

[0107] 250 parts of water

[0108] in:

[0109] Based on the weight of the monomer mixture as 100%, the hydrophilic monomer accounts for 50%, and the hydrophobic monomer accounts for 50%.

[0110] Hydrophilic monomer: acrylic acid: methacrylic acid: itaconic acid is 5:4:1;

[0111] Hydrophobic monomer: one or more of butyl acrylate, hydroxyethyl methacrylate, methyl methacrylate, 2-methyl methacrylate and 2-ethyl methacrylate;

[0112] Surfactant: modified functional monomer containing hydrophobic groups, behenyl alcohol polyoxyethylene ether methacrylate;

[0113] Initiator: ammonium persulfate

[0114] Cross-linking agent: diallyl phthalate

[0115] Emulsifier: sodium methacrylate hydroxypropyl sulfonate

[0116] Specifically include the following steps:

[0117] a. Add...

technical field

[0001] The invention belongs to the field of papermaking auxiliary agents, relates to regulators, in particular to a preparation method of a coating rheology water retention regulator. Background technique

[0002] Water retention is an important basic property of coatings, which has an important impact on coating running performance. For coatings with poor water retention, the moisture in the coating transfers too quickly to the base paper. Under the action of pressure, the moisture is easily released from the coating, which causes the coated filter cake to thicken and solidify quickly before entering the scraper nip. As a result, serious scratches appear; the adhesive in the coating also migrates into the base paper with the absorption of water, thereby reducing the surface strength of the coating, resulting in powder falling and delamination of the coated paper during printing. This problem is aggravated when the base paper has high absorbency and air per...

Examples

preparation example Construction

[0078] The salient features of the present invention will be described below from the specific preparation method of the paint rheology water retention modifier and the specific application of the paint rheology water retention modifier prepared by the preparation method of the present invention in coating.

[0079] 1. Preparation method of paint rheology water retention modifier

Embodiment 1

[0081] 100 parts of hydrophilic monomer + hydrophobic monomer

[0082] Surfactant 8 parts

[0083] Initiator 0.01 part

[0084] 0.01 parts of crosslinking agent

[0085] Emulsifier 0.1 parts

[0086] 250 parts of water

[0087] in:

[0088] Based on the weight of the monomer mixture as 100%, the hydrophilic monomer accounts for 30%, and the hydrophobic monomer accounts for 70%.

[0089] Hydrophilic monomer: acrylic acid: methacrylic acid: itaconic acid is 5:4:1;

[0090] Hydrophobic monomer: one or more of butyl acrylate, hydroxyethyl methacrylate, methyl methacrylate, 2-methyl methacrylate and 2-ethyl methacrylate;

[0091] Surfactant: modified functional monomer containing hydrophobic groups, behenyl alcohol polyoxyethylene ether methacrylate;

[0092] Initiator: ammonium persulfate

[0093] Cross-linking agent: diallyl phthalate

[0094] Emulsifier: sodium methacrylate hydroxypropyl sulfonate

[0095] Specifically include the following steps:

[0096] a. Add wate...

Embodiment 2

[0102] 100 parts of hydrophilic monomer + hydrophobic monomer

[0103] Surfactant 12 parts

[0104] Initiator 0.02 parts

[0105] 0.02 parts of crosslinking agent

[0106] 0.2 parts of emulsifier

[0107] 250 parts of water

[0108] in:

[0109] Based on the weight of the monomer mixture as 100%, the hydrophilic monomer accounts for 50%, and the hydrophobic monomer accounts for 50%.

[0110] Hydrophilic monomer: acrylic acid: methacrylic acid: itaconic acid is 5:4:1;

[0111] Hydrophobic monomer: one or more of butyl acrylate, hydroxyethyl methacrylate, methyl methacrylate, 2-methyl methacrylate and 2-ethyl methacrylate;

[0112] Surfactant: modified functional monomer containing hydrophobic groups, behenyl alcohol polyoxyethylene ether methacrylate;

[0113] Initiator: ammonium persulfate

[0114] Cross-linking agent: diallyl phthalate

[0115] Emulsifier: sodium methacrylate hydroxypropyl sulfonate

[0116] Specifically include the following steps:

[0117] a. Add...

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