Thermosetting reaction type EVA hot-melt adhesive

A reactive, hot-melt adhesive technology, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the heat resistance, cohesive strength, bonding strength, solvent resistance and other properties of hot-melt adhesives Poor, low initial tack and fast tack strength, difficult construction and operation, etc., to achieve the effect of enriching formula, improving heat resistance, and reducing melt viscosity

Inactive Publication Date: 2007-11-14
杭州仁和热熔胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current EVA hot melt adhesives mainly include reactive pure EVA organic polymer materials and non-reactive ordinary EVA hot melt adhesives; the molecular structure of ordinary EVA hot melt adhesives is linear, and the heat resistance and cohesive strength of hot melt adhesives , Adhesive strength, solvent resistance and other properties are poor; reactive pure EVA organic polymer materials have low initial and fast bonding strength, high bonding temperature, short curing time, and poor low temperature performance, so it is not easy to construct and maintain. operate
The degree of cross-linking of the system cannot be controlled by adjusting the amount of tackifying resin added, but the degree of cross-linking of the system can only be controlled by the amount of cross-linking agent, temperature and time used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: this thermosetting reaction type EVA hot-melt adhesive, the weight ratio of its raw material is as follows:

[0016] EVA resin (ethylene-vinyl acetate copolymer resin VA>18%): 55 parts

[0017] Tackifier (described tackifier adopts C5 petroleum resin) 25 parts

[0018] Content 4 0% dicumyl peroxide (DCP): 0.1 parts

[0019] Benzoyl peroxide (BPO): 0.1 parts

[0020] 1,2-Divinylbenzene (TMPTMA): 0.2 parts.

[0021] Ethylene-vinyl acetate copolymer resin VA>18%, the physical and chemical properties of EVA copolymer are mainly determined by the content of vinyl acetate on the molecular chain (abbreviated as VA%).

[0022] The tackifier adopts C5 petroleum resin, and C5 petroleum resin (aliphatic hydrocarbon petroleum resin) is polymerized with the by-product G5 fraction in the production of ethylene in the petrochemical industry as a raw material.

[0023] The basic principle of the present invention is that in some specific non-reactive EVA hot melt adhe...

Embodiment 2

[0024] Embodiment 2: this thermosetting reaction type EVA hot-melt adhesive, the weight ratio of its raw material is as follows:

[0025] EVA resin: 85 parts

[0026] 45 parts of tackifier

[0027] Dicumyl peroxide: 0.6 parts

[0028] Benzoyl peroxide: 0.5 parts

[0029] 1,2-Divinylbenzene: 0.5 parts.

[0030] The tackifier adopts 138 rosin glycerin resin; 138 rosin glycerin resin is formed by lipidation of rosin and glycerin, and is made into an irregular transparent solid after vacuum treatment. Features: 138 rosin glycerin resin is soluble in petroleum hydrocarbons, aromatics, esters, ketones, gasoline, benzene, acetate, acetone and turpentine, insoluble in alcohol solvents, partially soluble in petroleum solvents, and vegetable oils Good miscibility. Form a transparent system with high polymers such as NR, GR, EVA, SIS, and SBS in a large ratio range.

Embodiment 3

[0031] Embodiment 3: this thermosetting reaction type EVA hot-melt adhesive, the weight ratio of its raw material is as follows:

[0032] EVA resin: 60 parts

[0033] 30 parts of tackifier

[0034] Dicumyl peroxide: 0.3 parts

[0035] Benzoyl peroxide: 0.3 parts

[0036] 1,2-Divinylbenzene: 0.3 parts.

[0037] Described tackifier adopts 138 rosin glycerides.

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PUM

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Abstract

The present invention relates to a hot-set reactive EVA thermo sol. The weight proportion of this material: EVA gum (55-85 shares), increase dimension agent (25-45 shares), crummy peroxide (0.01-0.6 shares), benzoic peroxide (0.01-0.5 shares), 1, 2-divinylbenzene (0.01-0.5 shares). Comparing to normal EVA thermo sol, the present invention obviously increases heat endurance, cohesive strength, bonding action and refractoriness of the EVA thermo sol. The technical level of the EVA thermo sol is increased, and in some aspects, it can replace the PA, PUR, PET thermo sols.

Description

technical field [0001] The invention relates to the field of EVA hot-melt adhesives, and mainly relates to a thermosetting reactive EVA hot-melt adhesive. Background technique [0002] EVA hot melt adhesive is a solid meltable polymer that does not require solvents and does not contain moisture. It is solid at room temperature, and becomes a fluid and viscous liquid adhesive when heated to a certain temperature. The melted EVA hot melt adhesive is a light brown translucent or off-white (titanium dioxide added) adhesive material. The EVA hot melt adhesive is composed of basic resin, tackifier, viscosity regulator and antioxidant. [0003] The current EVA hot melt adhesives mainly include reactive pure EVA organic polymer materials and non-reactive ordinary EVA hot melt adhesives; the molecular structure of ordinary EVA hot melt adhesives is linear, and the heat resistance and cohesive strength of hot melt adhesives , Adhesive strength, solvent resistance and other properties...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J11/06
Inventor 赵庆芳
Owner 杭州仁和热熔胶有限公司
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