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Nano-modified two-component solventless flexible packaging adhesive and preparation method thereof

A nano-modified, solvent-free technology, used in non-polymer adhesive additives, adhesive types, polyurea/polyurethane adhesives, etc., can solve problems such as inability to use, and reduce volatile and free substances , excellent viscosity, the effect of improving mechanical strength

Inactive Publication Date: 2018-05-29
新纳奇材料科技江苏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyurethane sealant prepared by this method avoids the use of toxic solvents, and is modified by inorganic fillers and organic fillers to endow the sealant with high strength, good flexibility, high tensile strength, and good UV stability, but it will produce volatile substances and toxic by-products, cannot be used in flexible packaging adhesives

Method used

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  • Nano-modified two-component solventless flexible packaging adhesive and preparation method thereof
  • Nano-modified two-component solventless flexible packaging adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Material preparation of component A: 50 parts of castor oil, 20 parts of hexanediol, 25 parts of polyether polyol, 3 parts of additives, and 2 parts of nano-modified materials. Check the airtightness of the reactor, replace it with nitrogen to dry and remove water, and control the temperature to 10°C. Put the materials of component A into castor oil (45 parts), hexanediol, and polyether polyol in sequence, and heat and stir for 30 minutes. Graphene oxide pretreated nano-titanium dioxide (rutile type) and 5 parts of castor oil, additives, gas-phase white carbon black are dispersed at low temperature (5°C) at high speed, and the speed is 3000RPM. , keep stirring at high speed. Stir at a low speed, lower the temperature, and discharge to prepare the component A material.

[0027] Preparation of component B: 40 parts of MDI, 5 parts of TPU, 10 parts of polypropylene glycol (molecular weight 400), 30 parts of polyether polyol (molecular weight 2000-2500), 15 parts of ligni...

Embodiment 2

[0029] Material preparation of component A: 50 parts of castor oil, 20 parts of hexanediol, 25 parts of polyether polyol, 3 parts of additives, and 2 parts of nano-modified materials. Check the airtightness of the reactor, replace it with nitrogen to dry and remove water, and control the temperature to 10°C. Put the materials of component A into castor oil (45 parts), hexanediol, and polyether polyol in sequence, and heat and stir for 30 minutes. Knead and disperse nano-titanium dioxide (rutile type) pretreated by graphene oxide and high molecular weight amorphous saturated polyester resin 1:1, then add gas-phase white carbon black and knead together for 30 minutes, put it into the reactor for stirring and raise the temperature to 90°C. Keep stirring at high speed. Stir at a low speed, lower the temperature, and discharge to prepare the component A material.

[0030] Preparation of component B: 40 parts of MDI, 5 parts of TPU, 10 parts of polypropylene glycol (molecular weig...

Embodiment 3

[0032] Material preparation of component A: 50 parts of castor oil, 20 parts of hexanediol, 25 parts of polyether polyol, 3 parts of additives, and 2 parts of nano-modified materials. Check the airtightness of the reactor, replace it with nitrogen to dry and remove water, and control the temperature to 10°C. Put the materials of component A into castor oil (45 parts), hexanediol, and polyether polyol in sequence, and heat and stir for 30 minutes. Knead and disperse nano-titanium dioxide (rutile type) pretreated by graphene oxide and high molecular weight amorphous saturated polyester resin 1:1, then add gas-phase white carbon black and knead together for 30 minutes, put it into the reactor for stirring and raise the temperature to 90°C. Keep stirring at high speed. Stir at a low speed, lower the temperature, and discharge to prepare the component A material.

[0033] Preparation of component B: 40 parts of MDI, 5 parts of TPU, 10 parts of polypropylene glycol (molecular weig...

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Abstract

The invention provides a nano-modified two-component solventless flexible packaging adhesive and a preparation method thereof. A component A of the adhesive comprises castor oil or palm oil vegetableoil-based polyol, hexylene glycol, polyether polyol, additives and graphene oxide-pretreated nanoscale titanium dioxide. A component B comprises MDI, TPU, polypropylene glycol, polyether polyol and lignin amine-modified diphenylmethane diisocyanate. The components A and B are obtained through reactions in a reactor. The castor oil replaces a part of polyether polyol or polyester polyol, the adhesive contains few volatile and free materials and is eco-friendly and safe, through use of pretreated nano-titanium dioxide and additives, the reaction is mild and effective, the adhesive has UV resistance, and according to the reaction product chain length of the active NCO group of the MDI and the OH group of the polyol in the reaction process, the reaction temperature is timely adjusted. The solventless flexible packaging adhesive has excellent adhesive performances.

Description

technical field [0001] The invention belongs to the technical field of flexible packaging composite material adhesives, in particular to a nano-modified two-component solvent-free flexible packaging adhesive and a preparation method thereof. Background technique [0002] Flexible packaging is an important part of the packaging industry. Flexible packaging composite films are usually composed of several layers of films of different materials. The mainstream direction of the consumer market. All kinds of flexible packaging adapt to this trend and are developing at a high speed. Its scope of application is very wide, including different forms such as block, granule, powder, gel, vacuum and liquid, covering medicine, health care products, medical equipment, hardware, Toys, stationery, food, pesticides, carbonated beverages, sanitary products, clothing and textile industries. [0003] The performance of the flexible packaging composite film prepared by the dry method is not onl...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J11/04C08G18/67C08G18/48C08G18/32C08G18/76C08G18/64C08G18/42C08G18/66C09J7/24
CPCC08G18/3206C08G18/36C08G18/4081C08G18/42C08G18/48C08G18/4804C08G18/4825C08G18/6492C08G18/6629C08G18/7614C08G18/7671C08K3/36C08K9/02C08K2003/2241C08K2201/011C09J11/04C09J175/08C09J2301/408C09J2423/046C09J2475/00
Inventor 余跃
Owner 新纳奇材料科技江苏有限公司
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