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Preparation method of single-component anti-media adhesive

An anti-medium and adhesive technology, applied in the direction of adhesive types, polyurea/polyurethane adhesives, adhesives, etc., can solve the problem of affecting the bond fastness of composite adhesives, detachment of packaging bag film layers, and peeling Reduced strength and other problems, to achieve excellent media resistance, avoid penetration, high initial adhesion effect

Inactive Publication Date: 2010-09-01
BEIJING COMENS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For corrosive contents, the inner structure film tends to permeate in the packaging, thereby affecting the bonding fastness of the composite adhesive used in the packaging, causing the peeling strength to decrease sharply over time, seriously causing Layers of packaging bag film are separated, resulting in production accidents

Method used

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  • Preparation method of single-component anti-media adhesive
  • Preparation method of single-component anti-media adhesive
  • Preparation method of single-component anti-media adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment 1 provides a preparation method of a one-component anti-medium adhesive, which can prepare a one-component anti-medium adhesive, which can be used in packaging materials to make the packaging materials resistant to acids, alkalis, In terms of pesticide resistance, it has more excellent medium resistance than traditional polyurethane. The preparation method includes:

[0025] (1) Synthetic polyester polyol:

[0026] Get each raw material of preparing polyester polyol by following mass percentage:

[0027] 5-10% of dimer acid, 5-10% of sebacic acid, 20-30% of diethylene glycol, 15-30% of phthalic acid, 5-10% of azelaic acid and 20-20% of neopentyl glycol 30%;

[0028] a. Primary esterification:

[0029] Add dimer acid, sebacic acid, and diethylene glycol into the polyester synthesis kettle, raise the temperature to 210-230°C, and react for 2-3 hours to complete the primary esterification;

[0030] In an esterification step, generally keep the amount of...

Embodiment 2

[0046] This embodiment 2 provides a preparation method of a one-component anti-medium adhesive, which preparation method comprises the following steps:

[0047] (1) prepare polyester polyol, get each raw material according to the following table proportioning ratio:

[0048]

[0049]

[0050] The concrete preparation method of polyester polyol:

[0051] a. Primary esterification:

[0052] Add the dimer acid, sebacic acid and diethylene glycol in the above formula into the polyester synthesis kettle, raise the temperature to 225°C, react for 3 hours, and distill 2 parts by mass of water;

[0053] b. Secondary esterification:

[0054] Add the phthalic acid, azelaic acid and neopentyl glycol in the above formula into the above-mentioned polyester synthesis kettle that has completed the primary esterification, raise the temperature to 230°C, and react for 5 to 6 hours; during the secondary esterification process, Pay attention to observe the water output of the polyester sy...

Embodiment 3

[0064] This embodiment 3 provides a preparation method of a one-component anti-medium adhesive, which preparation method comprises the following steps:

[0065] (1) prepare polyester polyol, get each raw material according to the following table proportioning ratio:

[0066]

[0067] The method for preparing polyester polyol is with embodiment 1, can refer to above-mentioned embodiment 2, does not repeat here;

[0068] (2) chain extension reaction, get each raw material according to the proportioning of the table:

[0069]

[0070] The specific steps of the chain extension reaction:

[0071] Add the polyester polyol, hexamethylene diisocyanate (HDI) and ethyl acetate prepared above into the synthesis kettle, raise the temperature to 75°C-85°C, react for 3-4 hours and then cool down to 40°C-50°C Add isophorone diamine, react for 1 to 2 hours, the obtained product is a one-component anti-medium adhesive, test the prepared one-component anti-medium adhesive (can be sample...

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Abstract

The invention discloses a preparation method of a single-component anti-media adhesive, which belongs to the field of an adhesive and comprises the steps of: preparing polyester polyol: esterifying dimer acid, sebacic acid and diglycol in a polyester synthetic kettle; adding phthalandione, azelaic acid and neopentyl glycol to carry out secondary esterification; undergoing polycondensation reaction to obtain the polyester polyol; reacting the prepared polyester polyol with isocyanate and ethyl acetate; adding an aliphatic amine chain extender; and undergoing chain extension reaction to obtain a product which is the single-component anti-media adhesive after the reaction. In the preparation method, the structure of a polyester chain section is designed and a urea-based formic ether chain section unit is introduced, so that the prepared single-component anti-media adhesive has high initial anchorage and resistance to various corrosive contents. Compared with a traditional polyurethane adhesive, the single-component anti-media adhesive has more excellent anti-media performance when used on acid, alkali, and pesticide resistant packing materials.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a preparation method of a one-component medium-resistant adhesive. Background technique [0002] Composite flexible packaging film is usually composed of several layers of films of different materials. Since its appearance in the 1950s, due to its excellent comprehensive performance, it has been widely used in food, medicine, cosmetics, daily necessities, chemicals, weapons and ammunition, precision instruments, Instruments, complete sets of equipment & electronic appliances and other industries. The composite film production process used in flexible packaging mainly includes dry composite technology and extrusion composite technology. Among them, due to the small investment in dry composite technology equipment, high product quality, and simple process, it is widely used, and its product output accounts for all composite films. More than 50% of. According to the requirements...

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J9/00C08G63/54
Inventor 赫长生沈峰邓煜东
Owner BEIJING COMENS NEW MATERIALS
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