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Adhesive of hot melting coating for laminated steel process and preparation method thereof

A technology of adhesive and laminating iron, applied in the direction of adhesive types, polyurea/polyurethane adhesives, adhesives, etc., can solve the problem of rare pre-coated film products, achieve excellent bonding strength, improve bonding effect, the effect of enhancing the bond strength

Inactive Publication Date: 2012-11-07
BEIJING COMENS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the home appliance panel, can making and other laminated iron industries, because its products are mainly PET / steel composites, and after composites, it is required to withstand harsh conditions such as deep drawing resistance, salt spray resistance, and high temperature resistance, so the current pre-coated film products in this area also rare

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0013] The hot-melt coating adhesive for laminating iron technology of the present invention, its preferred embodiment is:

[0014] The adhesive is based on polyester polyol, 4,4'-diphenylmethane diisocyanate, 2,2-dipropane or 4-hydroxyphenylpropane, organic solvent, bisphenol A type epoxy resin and silane diisocyanate The joint agent is used as the raw material, and tetra-n-butyl titanate and triethylamine are used as the mixed catalyst. After the mixed reaction of each component, the solid content of the compound is 25% to 35%, the viscosity is 300mPa·s to 500mPa·s, and the hydroxyl value is 10~20mgKOH / g binder;

[0015] The polyester polyol is based on terephthalic acid, isophthalic acid, adipic acid, neopentyl glycol, ethylene glycol and diethylene glycol as raw materials, with stannous octoate or tetra-n-butyl titanate as a catalyst , with triphenyl phosphite as an antioxidant, each component is esterified and polycondensed to produce polyester polyol.

[0016] Synthesi...

Embodiment 1

[0033] This embodiment provides a hot-melt coating adhesive for laminating iron technology, which is used in laminating iron, and the adhesive is prepared according to the following steps:

[0034] Preparation of polyester polyol: 27 mass parts of terephthalic acid, 100 mass parts of isophthalic acid, 12 mass parts of adipic acid, 55 mass parts of neopentyl glycol, 8 38 parts by mass of diethylene glycol, 0.4 parts by mass of tetra-n-butyl titanate, and 0.4 parts by mass of triphenyl phosphite. After fully stirring evenly, the temperature was raised to 210-230° C., reacted for 3 hours, and 30 parts by mass of water slipped out. After the first esterification, the acid value was measured to be 16 mgKOH / g. After the primary esterification is completed, vacuumize the inside of the polyester kettle, and pre-pump -0.02MPa, -0.04MPa, -0.06MPa, -0.08MPa in turn for 1 hour, and control the temperature of the kettle at 245-255°C. After the pre-evacuation is completed, a long-term vacu...

Embodiment 2

[0038]This embodiment provides a hot-melt coating adhesive for laminating iron technology, which is used in laminating iron, and the adhesive is prepared according to the following steps:

[0039] Preparation of polyester polyol: Add 100 parts by mass of terephthalic acid, 30 parts by mass of isophthalic acid, 20 parts by mass of adipic acid, 50 parts by mass of neopentyl glycol, 18 parts by mass of ethylene glycol in the polyester reaction kettle parts by mass, 20 parts by mass of diethylene glycol, 0.4 parts by mass of tetra-n-butyl titanate, and 0.4 parts by mass of triphenyl phosphite. After fully stirring evenly, the temperature was raised to 210-230° C., reacted for 3 hours, and 32 parts by mass of water slipped out. After the primary esterification, the acid value was measured to be 14 mgKOH / g. After the primary esterification is completed, vacuumize the inside of the polyester kettle, and pre-pump -0.02MPa, -0.04MPa, -0.06MPa, -0.08MPa in turn for 1 hour, and control t...

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Abstract

The invention discloses an adhesive of a hot melting coating for a laminated steel process and a preparation method of the adhesive. The adhesive is synthesized by mixing and reacting polyester polyol, 4,4'-diphenylmethane diisocyanate, 2,2-dipropane or 4-hydroxyphenyl propane, an organic solvent, a bisphenol-A epoxy resin and a silane coupling agent as raw materials under the action of etrabutyl titanate and triethylamine as a mixed catalyst, wherein the solid content of the adhesive is 25-35%, the viscosity is 300-500mPa.s, and the hydroxyl value is 10-20mgKOH / g; and the polyester polyol is prepared by performing a primary esterification and a polycondensation for the components through taking terephthalic acid, m-phthalic acid, hexane diacid, neopentyl glycol, ethylene glycol and diethylene glycol as raw materials, stannous octoate or tetrabutyl titanate as a catalyst, and triphenyl phosphate as an antioxidant. The adhesive does not rise at 9 mm in a laminated steel product cup drawing experiment and does not bubble within 240 h in a salt spray resistance experiment, thereby reaching the requirements of applying the laminated steel products.

Description

technical field [0001] The invention relates to a chemical adhesive, in particular to a hot-melt coating adhesive for laminating iron technology and a preparation method thereof. Background technique [0002] Laminated iron process refers to the compounding of color-printed plastic films such as PET, BOPP, etc. on metal plates such as cold-rolled steel plates, iron plates or aluminum plates by hot-melt lamination, instead of tin-plated iron and chrome-plated iron. A composite method of iron printing process printing. The laminated iron prepared in this way has the dual characteristics of plastic film and metal sheet, and is mainly used in cans, home appliance panels, fire door panels, aluminum buckle ceilings and other fields. [0003] The traditional laminating iron process is mainly a coating wet lamination process of gluing on the steel plate or film, while PET pre-coated film composite steel plate is a novel laminating iron process that has just emerged in recent years....

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J163/02C08G18/76C08G18/66C08G18/42
Inventor 隋学斌赫长生沈峰
Owner BEIJING COMENS NEW MATERIALS
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