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High-speed compounding and online peeling polyurethane transfer adhesive and preparation method thereof

A polyurethane and adhesive technology, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of emulsion performance not meeting the requirements, slow production speed, long curing time, etc., to ensure high-speed coating And on-line stripping, increasing the glass transition temperature, and controlling the effect of product quality

Inactive Publication Date: 2019-05-31
SHANTOU XINYUAN CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent No. CN201510088121.0 discloses a water-based transfer adhesive and its preparation method. The technical solution is to solve the contradiction between folding resistance, heat resistance and embossing resistance of acrylic transfer adhesive. A core-shell structure acrylate transfer adhesive with different glass transition temperatures was developed, which not only improved the adhesive force and compressive resistance of the adhesive, but also improved the folding resistance. It still cannot meet the requirements, and the water-based glue generally has a solid content of less than 60% and contains a lot of water. When it is applied, it needs to be dried in an oven, which consumes a lot of energy, the application process is complicated, the equipment investment is large, and the production speed is slow.
[0006] In recent years, people have paid more and more attention to the research on polyurethane transfer adhesives. For example, the patent specification CN201711147247.6 discloses a solvent-free polyurethane adhesive suitable for aluminum plating transfer and its preparation method. The transfer adhesive uses Isocyanate-terminated solvent-free polyurethane one-component adhesive is used to manufacture transfer aluminum-coated paper. Although it can meet the application requirements of cigarette packs, it needs to be cured at 60% humidity for 36-48 hours after coating. Stripping is not conducive to quality control and testing, and it is difficult to realize industrial production
In addition, the single-component adhesives disclosed in the invention patent specifications of CN200710041794.6 and CN201710141071.7 are difficult to be applied industrially due to the long curing time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In the present embodiment, the preparation method of high-speed composite on-line peeling polyurethane transfer adhesive comprises the following steps:

[0035] (1) Preparation of component A

[0036] (1-1) Prepare the following raw materials by weight: polymer A1 45% (including polycarbonate diol with a molecular weight of 400 and polyoxypropylene ether diol with a molecular weight of 1000 each accounting for 22.5%), polymer A2 9 % (both polyoxyethylene ether triols with a molecular weight of 500), polyisocyanate 45% (both diphenylmethane diisocyanate), coupling agent 0.88% (both silane coupling agent KH-560), leveling Agent 0.12% (both are polyether type silane leveling agents, the model is Tego 270);

[0037] (1-2) Add Polymer A1 and Polymer A2 into the dehydration reactor, and heat Polymer A1 and Polymer A2 to 115°C at a vacuum of -8×10 -4 Pump water under MPa for 2 hours, then cool down to 30°C, and set aside;

[0038] (1-3) Add polyisocyanate to the polymerizat...

Embodiment 2

[0047] In the present embodiment, the preparation method of high-speed composite on-line peeling polyurethane transfer adhesive comprises the following steps:

[0048] (1) Preparation of component A

[0049] (1-1) Prepare the following raw materials by weight: polymer A1 50% (27.3% of which is polytetrahydrofuran diol with a molecular weight of 680, and 22.7% is polyphthalic acid diol with a molecular weight of 1000), polymer A2 4.9% (both polyoxyethylene ether triols with a molecular weight of 1000), 44% polyisocyanate (both polymethylene polyphenyl polyisocyanate), 1% coupling agent (both silane coupling agent KH-560 ), leveling agent 0.1% (both are polyether type silane leveling agents, the model is Tego 270);

[0050] (1-2) Add Polymer A1 and Polymer A2 into the dehydration reactor, and heat Polymer A1 and Polymer A2 to 105°C at a vacuum of -10×10 -4 Pump water under MPa for 4 hours, then cool down to 40°C and set aside;

[0051] (1-3) Add polyisocyanate to the polymeri...

Embodiment 3

[0060] In the present embodiment, the preparation method of high-speed composite on-line peeling polyurethane transfer adhesive comprises the following steps:

[0061] (1) Preparation of component A

[0062] (1-1) By weight, the following raw materials are equipped: polymer A1 54% (25% of which is polyphthalate neopentyl glycol polyester diol with a molecular weight of 1500, and 29% is polyoxyethylene glycol with a molecular weight of 3000 vinyl ether diol), Polymer A2 8% (both polyoxyethylene ether triols with a molecular weight of 4 functionalities of 500), polyisocyanate 36% (both toluene diisocyanate), coupling agent 1.5% (both Silane coupling agent KH-560), leveling agent 0.5% (both are polyether type silane leveling agents, the model is Tego 270);

[0063] (1-2) Add Polymer A1 and Polymer A2 into the dehydration reactor, and heat Polymer A1 and Polymer A2 to 120°C in a vacuum of -6×10 -4 Pump water under MPa for 3 hours, then cool down to 50°C and set aside;

[0064] (1...

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PUM

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Abstract

The invention discloses a high-speed compounding and online peeling polyurethane transfer adhesive which comprises a component A and a component B. The component A comprises, in weight percent, 30-70%of polymers A1, 1-10% of polymers A2, 20-60% of polyisocyanate, 0.5-2% of coupling agents and 0.1-1% of leveling agents, the polymers A1 is one of polyether polyol and polyester polyol or mixture ofthe polyether polyol and the polyester polyol, the functionality of the polyether polyol is 2, the polymers A2 is one of polyester polyol and polyether polyol or mixture of the polyester polyol and the polyether polyol, and the functionality of the polyester polyol is larger than or equal to 3. The component B comprises, in weight percent, 5-25% of amine chain extenders, 0.1-1% of amine catalystsand the balance water. The invention further provides a preparation method of the high-speed compounding and online peeling polyurethane transfer adhesive. The high-speed compounding and online peeling polyurethane transfer adhesive is used for production of transfer aluminized paper, high-speed compounding and online peeling can be achieved, improvement of production speed is facilitated, energyconsumption and production cost are reduced, and the adhesive has high bending resistance and good heat resistance and anti-sticking property and is safe and environmentally friendly.

Description

technical field [0001] The invention relates to an adhesive, in particular to a high-speed composite on-line peeling polyurethane transfer adhesive and a preparation method thereof. Background technique [0002] Transfer aluminized paper is a new type of packaging material, with its environmental protection, aesthetics, economy and anti-counterfeiting characteristics, it replaces the traditional PET-coated cardboard or aluminum foil composite cardboard, and is widely used in high-end printing such as tobacco, alcohol, food, and medicine. packaging field. The production process of transfer aluminized paper is to first coat the transfer coating on the film (such as PP film or PET film), dry the film and vacuum aluminize it, then apply the transfer adhesive (transfer adhesive), and transfer the aluminized film to the paper After compounding, the film is peeled off after drying to become transfer aluminized paper. [0003] The early transfer adhesives were mainly organic solve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C08G18/76C08G18/66C08G18/48C08G18/44C08G18/42C08G18/32C08G18/12
Inventor 谢铠烨谢进标郑宏志郑少琴
Owner SHANTOU XINYUAN CHEM TECH CO LTD
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