Composite acrylic resin hot-melt adhesive and preparation method thereof

A technology of hot melt adhesive and acrylic resin, applied in the direction of adhesive type, ester copolymer adhesive, adhesive, etc. High strength, strong sticking force, stable storage effect

Active Publication Date: 2022-03-22
河南省中凌煜新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

People also use a post-crosslinking system, which is to introduce a functional monomer with a ketone carbonyl group (C=O) (such as diacetone acrylamide DAAM) or an epoxy group (such as glycidyl methacrylate GMA) during emulsion polymerization. ), etc. After the emulsion polymerization is completed, diamines (such as adipate dihydrazide ADH) are added, and the active group ketone carbonyl or epoxy group and diamines form a post-crosslinking system, among which DAAM-ADH crosslinking system (Generally known as self-crosslinking system) is especially commonly used, but the acrylic emulsion laminating adhesive of DAAM-ADH crosslinking system, with the extension of emulsion storage time, the powder covering property of the film on the surface of the printed matter becomes worse, and the peel strength decreases. The reason is that the DAAM-ADH cross-linking system will still gradually cross-link during storage, although ammonia water is generally added to the system to occupy the ketone carbonyl (form C=NH) and prevent the diamine (ADH) in the system from ) is combined with the ketone carbonyl in the polymer in advance, but in the emulsion system, ADH easily penetrates into the interior of the colloidal particle, and NH 3 In contrast, bifunctional ADH is also easy to interact with polymers with polyketone carbonyl groups. With the prolongation of storage time, ADH and C=NH will gradually exchange, and the gradual crosslinking of DAAM-ADH in the emulsion will be inevitable.

Method used

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  • Composite acrylic resin hot-melt adhesive and preparation method thereof
  • Composite acrylic resin hot-melt adhesive and preparation method thereof
  • Composite acrylic resin hot-melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation of embodiment 1 acrylic resin emulsion E-1

[0024] After mixing 145.0 g of butyl acrylate, 31.0 g of styrene, 6.0 g of hydroxyethyl acrylate, and 4.0 g of methacrylic acid at room temperature, they were added to a mixture containing 70.0 g of water and the emulsifier alkylphenol polyoxyethylene ether ammonium sulfate. 1.8 g and 0.8 g of allyloxy hydroxypropyl sodium sulfonate were pre-emulsified for 30 minutes to obtain pre-emulsified monomer A. Take 20.0 g of pre-emulsified monomer A as a seed, add it into a reaction flask, add 120.0 g of water, 0.3 g of ammonium sulfate of alkylphenol polyoxyethylene ether, 1.2 g of sodium allyloxy hydroxypropyl sulfonate and an initiator over Ammonium sulfate 0.4 g, react at 80-84°C for 30 minutes, then add the remaining pre-emulsified monomer A and ammonium persulfate 0.5g dropwise at 80-84°C (add in the form of solution, dissolve 0.5g ammonium persulfate into 5g of water), the dropwise addition was completed withi...

Embodiment 2，3

[0025] Embodiment 2, the preparation of 3 acrylic resin emulsion E-2, E-3

[0026] The proportions of raw materials used in the preparation of pre-emulsified monomer A are shown in Table 1. The experimental process was referred to in Example 1, and acrylic resin emulsions E-2 and E-3 with a solid content of about 40% were prepared.

[0027] Table 1 Ratio of raw materials used in the preparation of pre-emulsion monomer A and the glass transition temperature of the obtained emulsion

[0028]

Embodiment 4

[0029] Example 4 Solid acrylic resin R 1 preparation of

[0030]Mix 60.0 g of styrene, 30.0 g of methylstyrene, 42.0 g of acrylic acid, 3.0 g of maleic anhydride, 118.0 g of butyl acrylate, and 5.0 g of di-tert-butyl peroxide at room temperature to obtain a mixture B. Add 48.0 g of solvent propylene glycol butyl ether into the reactor, heat to raise the temperature to 140-145°C, and gradually drop the mixture B into the reactor within 2 hours. After the addition, raise the temperature to 175°C and keep it for 60 minutes. Then reduce pressure (pressure 16-20 kpa) to distill off the solvent propylene glycol butyl ether, discharge while hot, and cool to room temperature to obtain solid acrylic resin R 1 , The softening point is 103°C.

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Abstract

The invention relates to a composite acrylic resin hot-melt adhesive. The adhesive is prepared by mixing an acrylic resin emulsion and a solid acrylic resin aqueous dispersion in proportion. The composite hot-melt adhesive is high in peel strength, strong in holding power and stable in storage, has the characteristics of no film stripping, embossing resistance and the like after a plastic film and color printing packaging paper are compounded, has good thermal bonding performance on a BOPP (biaxially-oriented polypropylene) film and printing paper, can be used for a dry laminating process for field coating, and also can be used as adhesive resin in a pre-coating film.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and specifically relates to a composite acrylic resin hot-melt adhesive and a preparation method thereof, which is obtained by compounding an acrylic emulsion and an acrylic solid resin aqueous dispersion and used as a hot-melt adhesive It is used in the production of paper-plastic composite packaging materials. Background technique [0002] Acrylic emulsion is used as a hot-melt adhesive, used as an adhesive when color printing packaging paper is combined with plastic film, and the coated paper product is used as packaging material, with high gloss, waterproof and mildewproof functions, used in various on the product packaging. Pre-coated film lamination and dry lamination are widely used in paper-plastic composite construction. Color printing wrapping paper generally has thick color patterns, and powder is widely sprayed in the process, and some powdery particles remain on the ink printing l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C08F220/18C08F212/08C08F220/20C08F220/06C08F212/12C08F222/06
CPCC09J133/066C08F220/1804C08L33/064C08F212/08C08F220/20C08F220/06C08F212/12C08F222/06
Inventor 王利敏程森祥宋晓宇陈彤
Owner 河南省中凌煜新材料科技有限公司
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