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Water-based release glue as well as preparation method and application thereof

A release, water-based technology, applied in coatings, polyester coatings, etc., can solve the problem of difficult adhesion between the primer layer and the polyester layer, substandard adhesion between the ink layer and the primer layer, ink and primer layer. Adhesion is not up to standard and other problems, to achieve the effect of good adhesion and peeling balance, good printing decoration effect and excellent temperature resistance

Pending Publication Date: 2022-07-12
CHUZHOU JINQIAO TEXAS NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The adhesion between the primer layer and the polyester layer is difficult to reach the standard in a short time. The specific performance is that the polyester film coated with the primer layer needs to be allowed to stand and mature. If it is not cured, after the UV ink layer is coated, the ink will The ink layer will erode the undercoat layer, causing the undercoat layer and the polyester film layer to fall off, which cannot meet the requirements of continuous production in a short period of time.
[0006] (2) The longest subsequent construction time of UV ink is relatively short. The specific performance is: the polyester film coated with the primer layer needs to be temporarily placed for a few days due to the production schedule before the ink layer is produced, and when the UV ink is coated again Ink layer, the adhesion between the ink layer and the primer layer will not meet the standard
[0007] (3) The polyester film coated with the primer layer needs to be strictly controlled for storage temperature and humidity during the storage process. The specific performance is: the polyester film coated with the primer layer is stored under normal temperature and humidity conditions. The undercoat will accelerate cross-linking and curing due to the influence of ambient temperature and humidity. When UV ink is applied again, the adhesion between the ink and the undercoat will not meet the standard and will fall off.
[0008] (4) The traditional PET primer is a solvent-based product, which uses a large amount of volatile organic solvents, which easily produces a large amount of volatile organic compounds (VOC), pollutes the environment, and damages the health of craftsmen; It is very easy to burn in the drying tunnel and cause production accidents

Method used

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  • Water-based release glue as well as preparation method and application thereof
  • Water-based release glue as well as preparation method and application thereof
  • Water-based release glue as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0035] Preparation Example 1, Waterborne Epoxy Modified Acrylic Emulsion I

[0036] Mix 780g epoxy resin E44, 1g dimethylbenzylamine, 0.1g hydroquinone, and 90g propylene glycol methyl ether, heat to 80-100°C, and then slowly add a mixture of 202g crotonic acid and 40g propylene glycol methyl ether. The reaction is performed at a constant temperature for 2-3 hours after the dropwise addition is complete, and when the acid value is less than 3 mgKOH / g, the reaction is stopped to obtain the modified epoxy resin E44.

[0037] Mix 360 g of hydroxyethyl methacrylate, 350 g of methacrylic acid, 300 g of cyclohexyl methacrylate, 250 g of butyl acrylate, and 60 g of azobisisobutyronitrile, stir evenly, and add modified epoxy resin E51 to dissolve completely to obtain mono body mixture. Another 5g of disproportionated sodium rosin and 5g of poloxamer were mixed with 150g of water, and the monomer mixture was slowly added. After adding, the mixture was stirred at high speed for 30 minu...

preparation example 2

[0039] Preparation Example 2, Waterborne Polyurethane Modified Acrylate Emulsion I

[0040] 226g of lysine diisocyanate and 450g of N,N-diethylethanolamine were mixed, stirred and heated to 60°C, vacuumed to -0.095MPa and reacted for 30min, then heated to 80°C and reacted for 2h to obtain a polyurethane prepolymer. 145 g of acrylic acid-β-hydroxyethyl ester was added to cap the polyurethane prepolymer, and the reaction was carried out for 2 h to obtain a polyurethane crosslinking agent.

[0041] Mix 12g of octylphenol polyoxyethylene ether, 6g of disproportionated sodium rosinate, 280g of water and 2.5g of sodium bicarbonate, stir and fully dissolve to obtain an emulsion, then mix 360g of ethyl acrylate, 515g of ethyl 2-methacrylate and 17g of polyurethane cross-linking agent was stirred evenly to obtain a monomer solution. The monomer solution and potassium persulfate solution (containing 5g of potassium persulfate and 130g of water) were slowly added to the emulsion at 80°C ...

preparation example 3

[0042] Preparation Example 3, Waterborne Polyurethane Modified Acrylate Emulsion II

[0043] After mixing 125 g of diphenylmethane diisocyanate and 225 g of dehydrated polyether diol DL-2000, the temperature was raised to 60°C with stirring, and vacuumed to -0.095MPa for reaction for 40min, and then heated to 80°C for reaction for 2h to obtain polyurethane prepolymer. 58 g of acrylic acid-β-hydroxyethyl ester was added to cap the polyurethane prepolymer, and the reaction was carried out for 2 h to obtain a polyurethane crosslinking agent.

[0044] Mix 10.7g of octylphenol polyoxyethylene ether, 5.3g of sodium lauryl sulfate, 224g of deionized water and 1.3g of sodium bicarbonate, and then stir and fully dissolve to obtain an emulsion; then mix 24g of methyl methacrylate, 40g of Butyl acrylate and 15.5g of polyurethane cross-linking agent were stirred evenly to obtain a monomer solution; 3.2g of potassium persulfate was fully dissolved in 100g of deionized water to obtain a po...

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Abstract

The invention discloses water-based release glue as well as a preparation method and application thereof. The water-based release glue comprises the following components in parts by weight: 10-30 parts of water-based polyester resin; 20-50 parts of a water-based modified acrylic emulsion; 10 to 20 parts of a waterborne polyurethane modified acrylate emulsion; 5 to 25 parts of a cosolvent; 10 to 40 parts of deionized water; and 0.5 to 1.5 parts of an anti-sticking agent. The water-based release glue is a water-based coating, adopts the water-based modified acrylic emulsion, the water-based polyurethane modified acrylate emulsion and the water-based acrylic modified polyester, and is added with the anti-sticking agent, the cross-linking agent and the like, so that the water-based release glue has the advantages of excellent temperature resistance, flexibility, scratch resistance, good printing and decoration effects, high drying speed, good adhesive force and stripping balance degree, and good water-based release effect. And complete stripping can be realized by pulling with a 3M strong adhesive tape.

Description

technical field [0001] The invention belongs to the field of water-based coatings, and in particular relates to a preparation method and application of a water-based release adhesive. Background technique [0002] UV light-curable inks have high color saturation and high glossiness, especially in high-end product packaging. However, when printing on a non-absorbent substrate such as polyester film, the UV light-curable ink has low adhesion and is prone to deinking problems, which is not conducive to the continuation of the subsequent construction process and cannot be completely peeled off. [0003] Polyester film is made of polyethylene terephthalate polymer pellets and various additives through melting, extrusion, and then through transverse and longitudinal stretching processes to obtain transparent polyester films with different thicknesses. Ester film has a series of characteristics such as excellent transparency, flexibility, ductility and certain high and low tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/08C09D167/06C09D5/00C09D5/20C09D7/20C08J7/043C08L67/02
CPCC09D151/08C09D5/002C09D5/20C09D7/20C08J7/043C08J2367/02C08J2451/08C08L2205/025C08L2205/035C08L51/08C08L67/06
Inventor 王景泉严文舫
Owner CHUZHOU JINQIAO TEXAS NEW MATERIALS CO LTD
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