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Degradable waterproof hot melt adhesive and preparation method thereof

A technology of hot melt adhesive and thermoplastic starch, which is applied in the direction of adhesives, adhesive types, wood fiber material adhesives, etc., and can solve problems such as inability to guarantee bonding fastness, unstable bonding force, and poor bonding strength, etc. Problems, achieve the effect of improving aging phenomenon, enhancing weather resistance and perfecting shielding effect

Active Publication Date: 2021-02-02
SHENZHEN YOULI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most studied biodegradable hot melt adhesives are PLA hot melt adhesives and polyester amide hot melt adhesives. Good and other disadvantages, and affected by temperature and humidity changes in the working environment, this cannot guarantee the bonding fastness, and there is an inherent problem of bonding and peeling in packaging machinery

Method used

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  • Degradable waterproof hot melt adhesive and preparation method thereof
  • Degradable waterproof hot melt adhesive and preparation method thereof
  • Degradable waterproof hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The degradable hot-melt adhesive for waterproofing comprises the following components and parts by weight: 55 parts by weight of thermoplastic starch, 35 parts by weight of benzylated plant fiber, and 110 parts by weight of polyester amide.

[0049] The preparation method of degradable waterproof hot melt adhesive comprises the following steps:

[0050] 1) According to the molar ratio of ethylene glycol: adipic acid: hexamethylenediamine = 1.15:1:0.2, take ethylene glycol, adipic acid and hexamethylenediamine and melt them in a water bath at 75°C, and then feed them with N 2 Under the conditions, start stirring and raise the temperature to 150°C, then raise the temperature to 215°C at a heating rate of 35°C / h, then add glycerol and butyl titanate to the above melting system, and stir at a rate of 300r / min for 35min, Then depressurize the reaction system to -0.1MPa, then raise the temperature to 230°C, keep constant temperature and pressure for 1.5h until the rod climbin...

Embodiment 2

[0055] The degradable hot-melt adhesive for waterproofing comprises the following components and parts by weight: 55 parts by weight of thermoplastic starch, 35 parts by weight of benzylated plant fiber, 110 parts by weight of polyester amide, 80 parts by weight of tackifying resin rosin glyceride, Viscosity modifier microcrystalline paraffin 35 parts by weight, plasticizer dioctyl phthalate 15 parts by weight, filler 10 parts by weight, antioxidant 2,6-di-tert-butyl-p-cresol 5 parts by weight. The above-mentioned fillers are nano-calcium carbonate and nano-titanium dioxide in a weight ratio of 4.5:1.

[0056] The preparation method of degradable waterproof hot melt adhesive comprises the following steps:

[0057] Step 1)-step 3), is consistent with step in embodiment 1, and difference is following steps:

[0058] 4) Put polyester amide, thermoplastic starch, tackifying resin, benzylated plant fiber, viscosity regulator, plasticizer, filler and antioxidant into the mixer by w...

Embodiment 3

[0060] The preparation method of degradable waterproof hot melt adhesive comprises the following steps:

[0061] Step 1)-step 3), is consistent with step in embodiment 2, and difference is following steps:

[0062] Step 4), first according to the weight ratio of thermoplastic starch: benzylated plant fiber = 10:6, take 55 parts by weight of thermoplastic starch and 33 parts by weight of benzylated plant fiber and add them to the mixer, then add 0.5% by weight of thermoplastic starch 2-methoxytetrahydropyran, then by weight 110 parts by weight of polyesteramide, 80 parts by weight of tackifying resin rosin glyceride, 35 parts by weight of viscosity regulator microcrystalline paraffin, plasticizer phthalic acid 15 parts by weight of dioctyl ester, 10 parts by weight of filler, and 5 parts by weight of antioxidant 2,6-di-tert-butyl-p-cresol were put into the mixer, heated to 140°C while stirring, and the stirring speed was 60r / min. The mixing time is 45 minutes; then put the obt...

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Abstract

The invention provides a degradable waterproof hot melt adhesive and a preparation method thereof, belonging to the technical field of biodegradable high polymer materials. The preparation method of the hot melt adhesive comprises the following steps: providing polyesteramide; providing at least one thermoplastic starch; providing at least one benzylated plant fiber; enabling the polyesteramide, the thermoplastic starch and the benzylated plant fibers to form a uniformly mixed material in an environment not lower than 100 DEG C; and extruding and granulating the uniformly mixed material to obtain the degradable waterproof hot melt adhesive. According to the preparation method, the gas barrier property of the hot melt adhesive can be enhanced, and the yellowing index of the hot melt adhesive under an ultraviolet light condition is controlled to be not higher than 0.25, so the product hot melt adhesive shows ultraviolet aging resistance and water resistance and water resistance, and theservice life of the adhesive base material and the hot melt adhesive is prolonged; and the prepared hot melt adhesive has high initial adhesion and peel strength, can be firmly adhered to an adhesivebase material, has very strong functions of water resistance, puncture resistance, leakage resistance and the like, and is not easy to discolor and deteriorate.

Description

technical field [0001] The invention belongs to the technical field of biodegradable polymer materials, and in particular relates to a degradable waterproof hot melt adhesive and a preparation method thereof. Background technique [0002] Hot melt adhesive refers to an adhesive that is solid at room temperature and becomes liquid after heating and melting. After coating and wetting the adherend, it is pressed and cooled to complete the bonding within a few seconds. Therefore, people refer to hot melt adhesives as hot melt adhesives for short. It is made of thermoplastic resin as the base material, and contains viscosity regulator, filler, anti-aging agent, etc. after melting and mixing. It melts into a viscous fluid state when heated, and can wet the processing surface; Cooling and curing in a short period of time, no drying process, less energy consumption, easy operation, can be used in high-speed continuous production lines, can solve the problem of difficult sticking of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J177/12C09J103/04C09J197/02C09J11/04C09J11/06C09J11/08
CPCC08K2003/2241C08K2003/265C08L2201/08C08L2205/035C08L2205/16C09J11/04C09J11/06C09J11/08C09J177/12C08L3/04C08L97/02C08L91/06C08L93/04C08K13/02C08K5/12C08K3/26C08K3/22C08K5/13
Inventor 曹政委
Owner SHENZHEN YOULI NEW MATERIAL CO LTD
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