Waterborne vacuum plastic-absorbing glue and preparing method thereof

A vacuum absorption, water-based technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the limitation of increasing the feeding sequence, the high-density fiberboard bonding chip rate is not high, not introduced, etc. problems, to achieve excellent low temperature viscosity stability, reduce the risk of slag, and simplify the preparation steps.

Active Publication Date: 2017-04-26
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(6) Cost factor
The main problem is that the activation temperature and heat resistance cannot be well balanced: the general heat resistance can only reach 65°C, and the activation temperature is also between 50-60°C; in addition, the bonding tape of high-density fiberboard crumb rate is not high
Moreover, some commercially available products also have obvious low-temperature thickening problems
[0005] Chinese patent CN 101921381A introduces a preparation method of water-based vacuum plastic. The plastic suction prepared by this method has a suitable activation temperature and good temperature resistance, but the activation temperature and temperature resistance are still not well balanced. And it does not involve the storage stability of the crumb rate and the viscosity of the plastic glue in winter (low temperature); in addition, the patent only elaborates on the bond strength, and the bond strength does not directly reflect the crumb rate, the bond strength The test only reflects the peel strength between the PVC film and the fiberboard. There may be a high bond strength test, but there is almost no damage to the fiberboard; and the side edge wrapping of the density board is not introduced.
[0006] Chinese patent CN 101392164A also introduces a preparation method of water-based vacuum-absorbing plastic, its main feature is to improve the surface leveling effect by adding additives, but still does not avoid the above defects
[0007] In addition, the preparation methods of plastic blister introduced in the above two patents all need to adjust the pH of the ethylene-vinyl acetate emulsion in advance, which increases the restriction on the order of adding materials during the preparation of blister plastic, and also increases the actual production. Risk of demulsification and slag in the process

Method used

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  • Waterborne vacuum plastic-absorbing glue and preparing method thereof
  • Waterborne vacuum plastic-absorbing glue and preparing method thereof
  • Waterborne vacuum plastic-absorbing glue and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Water-based vacuum suction plastic is prepared from the following raw materials in parts by weight:

[0044] Aromatic waterborne polyurethane dispersion A 50 parts

[0045] Ethylene-vinyl acetate emulsion DA-102 (Dalian Chemical) 50 parts

[0046] Water-based terpene resin 968 (Shenzhen Yoshida Chemical Co., Ltd.) 10 parts

[0047] Defoamer BYK028 (Byk Chemicals) 0.1 parts

[0048] Wetting agent OT-75 (Cytec) 0.4 parts

[0049] thickener A801 (Wanhua Chemical) 0.5 parts

[0050] In this example, the preparation method of aromatic water-based polyurethane dispersion A is as follows: 200g of dehydrated poly-1,4-butylene adipate (number average molecular weight 3000), 55g of TDI-80, 50g of acetone, Add 20g of dimethylolpropionic acid and 4g of diethylene glycol into a 1L four-necked round-bottomed flask equipped with a nitrogen inlet and outlet, and stir the mixture at 60-80°C for 3.5h until the NCO% reaches 1.5%. Add 150g of acetone to dilute and cool down to 35°C,...

Embodiment 2

[0053] Water-based vacuum suction plastic is prepared from the following raw materials in parts by weight:

[0054] Aromatic waterborne polyurethane dispersion B 50 parts

[0055] Ethylene-vinyl acetate emulsion EP708 (Wacker Chemie) 40 parts

[0056] Water-based terpene resin 968 (Shenzhen Yoshida Chemical Co., Ltd.) 5 parts

[0057] Defoamer BYK024 (Byk Chemicals) 0.3 parts

[0058] Wetting agent OT-75 (cytec) 1 part

[0059] thickener A801 (Wanhua Chemical) 1 part

[0060] In the present embodiment, the preparation method of aromatic waterborne polyurethane dispersion B is as follows:

[0061] 200g of polyethylene adipate (number average molecular weight: 2000), 60g of TDI-80, 80g of acetone, 18g of dimethylol propionic acid, and 5g of diethylene glycol were added to an inlet filled with nitrogen gas after dehydration. In an outlet 1L four-necked round bottom flask, the mixture was stirred at 60-80° C. for 3 h until the NCO% reached 1.46%. Add 160g of acetone to dil...

Embodiment 3

[0065] Water-based vacuum suction plastic is prepared from the following raw materials in parts by weight:

[0066] Aromatic waterborne polyurethane dispersion C 60 parts

[0067] Ethylene-vinyl acetate emulsion DA-102 (Dalian Chemical) 40 parts

[0068] Defoamer BYK028 (Byk Chemicals) 0.3 parts

[0069] Wetting agent Tego wet270 (Di Gao) 1 part

[0070] thickener A801 (Wanhua Chemical) 1 part

[0071] In this example, the preparation method of aromatic water-based polyurethane dispersion C is as follows: 200g of dehydrated poly-1,6-hexanediol adipate (number average molecular weight 2000), 60g of TDI-80, 70g of acetone, Add 11.5g of dimethylolbutyric acid and 8g of diethylene glycol into a 1L four-neck round-bottomed flask equipped with a nitrogen inlet and outlet, and stir the mixture at 60-80°C for 2.5h until the NCO% reaches 2.20%. Add 160g of acetone to dilute and lower the temperature to 35°C, add 7.9g of triethylamine to neutralize for about 5min, then add 378g of...

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Abstract

The invention discloses a waterborne plastic-absorbing glue and a preparing method thereof. The waterborne plastic-absorbing glue is prepared from, by weight, 40-60 parts of aromatic aqueous polyurethane dispersion, 40-60 parts of ethylene-vinyl acetate emulsion, 0-10 parts of tackifying resin, 0.05-0.5 part of antifoaming agent, 0.1-1 part of wetting agent, and 0.1-1 part of thickening agent. The plastic-absorbing glue has excellent heat-resistant performance, pickup rate, bordure performance, low-temperature viscosity stability, and low activation temperature. The preparing method comprises the steps of adding aqueous polyurethane dispersion and ethylene-vinyl acetate emulsion into a high-speed dispersing kettle, then adding the tackifying resin, wetting agent, and antifoaming agent in sequence under a stirring condition, and finally adding the thickening agent to adjust the mixture into suitable viscosity to obtain the waterborne vacuum plastic-absorbing glue. According to the waterborne plastic-absorbing glue and the preparing method thereof, it is not necessary to adjust the pH of the ethylene-vinyl acetate emulsion in advance, and thus preparation procedures of traditional plastic-absorbing glue are simplified, and deslagging risks in the preparing process are lowered.

Description

technical field [0001] The invention relates to a water-based vacuum plastic-absorbing adhesive and a preparation method thereof, in particular to a high-strength, high-heat-resistant, and stable water-based adhesive used in a vacuum-absorbing plastic process and a preparation method thereof. Background technique [0002] Vacuum blister technology is widely used in the manufacture of computer desks, dressing tables, cabinets, door panels and furniture. The construction process is to cover the PVC film on the density board that has been dried after spraying glue, heat and soften the PVC through a vacuum suction machine and activate the plastic suction glue, use vacuum to remove the air between the PVC film and the density board film, rely on the atmosphere The pressure makes the PVC film stick tightly to the MDF. The biggest feature of this process is that it does not need to spray paint or paint. It is a paint-free process. This feature is especially important in the prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J123/08
CPCC08L2201/08C08L2205/03C09J123/0853C09J175/06C08L23/0853C08L75/06
Inventor 刘伟伟王震王海梅纪学顺
Owner WANHUA CHEM GRP CO LTD
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