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Adhesive for laminated steel and preparation method thereof

A technology of adhesive and laminated iron, applied in the direction of adhesive type, polyurea/polyurethane adhesive, polymer adhesive additive, etc., can solve the problem of poor temperature resistance, acid and alkali corrosion resistance, etc. problems, to achieve good temperature resistance and corrosion resistance

Inactive Publication Date: 2010-12-29
NANTONG GAOMENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the embodiments of the present invention is to provide an adhesive for laminating iron and its preparation method, which solves the problems of poor temperature resistance and substandard acid and alkali corrosion resistance of the traditional polyurethane system adhesive for laminating iron during use. And other issues

Method used

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  • Adhesive for laminated steel and preparation method thereof
  • Adhesive for laminated steel and preparation method thereof
  • Adhesive for laminated steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment provides an adhesive for laminating iron, which is used in laminating iron. In terms of weight percentage, the adhesive is 40-55% polyester polyol, 3-6% 4,4 'Diphenylmethane diisocyanate, 40-50% of environmentally friendly organic solvents, 0.1-0.5% of γ-glycidoxypropyl triethoxysilane and 4-6% of bisphenol A epoxy resin as raw material;

[0019] React polyester polyol, 4,4' diphenylmethane diisocyanate and environment-friendly organic solvent at 70-90°C for 3-4 hours, add γ-glycidoxypropyl triethoxysilane, The bisphenol A type epoxy resin can be used to prepare an adhesive with a solid content of 50% to 60%, a viscosity of 3000mPa·s to 5000mPa·s, and a hydroxyl value of 10 to 20mgKOH / g.

[0020] The polyester polyol used in the above-mentioned binder, by weight percentage, with 20~30% isophthalic acid, 20~30% 1,2 propanediol, 25~35% adipic acid and 15~25% % of neopentyl glycol as a raw material, the polyester polyol made from each raw material through...

Embodiment 2

[0030] This embodiment provides an adhesive for laminating iron, which is used in laminating iron. The adhesive is prepared according to the following steps:

[0031] (1) Prepare polyester polyol, get and prepare each raw material of polyester polyol according to the formula of the table:

[0032]

[0033] The operation steps of preparing polyester polyol are:

[0034] (1) primary esterification:

[0035] Add 29 parts by mass of isophthalic acid, 27 parts by mass of 1,2 propylene glycol, 25 parts by mass of adipic acid, and 19 parts by mass of neopentyl glycol into the polyester synthesis kettle, heat up to 210-230°C, Reacted for 3 hours; in the primary esterification process, the amount of water output was stable (accounting for 0.5-1.0% / hour of input raw material gross weight), distilled water 12 mass parts, the esterification reaction was completed, and the acid value of the measured product was 17mgKOH / g ( Meet the acid value ≤ 20mgKOH / g);

[0036] (2) Polycondensati...

Embodiment 3

[0045] (1) Prepare polyester polyol, get and prepare each raw material of polyester polyol according to the formula of the table:

[0046]

[0047] The operation steps of preparing polyester polyol are:

[0048] (1) primary esterification:

[0049] Add 20 parts by mass of isophthalic acid, 20 parts by mass of 1,2 propylene glycol, 35 parts by mass of adipic acid, and 25 parts by mass of neopentyl glycol into the polyester synthesis kettle, and raise the temperature to 210-230°C, React for 2.5 hours; during the first esterification process, keep the water output stable (0.5~1.0% / hour), and distill 13 parts by mass of water; after the esterification reaction is completed, the acid value of the measured product is 16mgKOH / g (according to the acid value≤20mgKOH / g);

[0050] (2) Polycondensation reaction:

[0051] After the first esterification is completed, vacuumize the inside of the polyester synthesis kettle, the vacuum degree is from -0.02Mpa to -0.04Mpa, and after 2 to...

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Abstract

The invention discloses an adhesive for laminated steel and belongs to the field of adhesives. The adhesive is prepared from the following raw materials: polyester polyol, 4,4'-diphenylmethane diisocyanate, an environment-friendly organic solvent, gamma-epoxypropoxypropyltriethoxysilane and a bisphenol A type epoxy resin, and has the synthesized solid content of 50 to 60 percent, the viscosity of3,000 to 5,000 mPa.s and the hydroxyl value of 10 to 20 mgKOH / g after reaction, wherein the polyester polyol is prepared from m-phthalic acid, 1,2 propylene glycol, adipic acid and neopentyl glycol through once esterification and polycondensation. The adhesive has the advantages of good temperature and corrosion resistance, a cup drawing test for the laminated steel product shows that the laminated steel product is unwarped at 8mm, and the problems that the conventional adhesive for the laminated steel has low temperature and corrosion resistance and the like are radically solved.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to an adhesive for laminating iron and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy, the metal packaging container industry has developed rapidly, and the consumption of tinplate, the main raw material in the packaging industry, has risen sharply. According to the statistics of China Packaging Technology Association, the contradiction between supply and demand in my country's tinplate market is becoming increasingly prominent. For this reason, the sales price of tinplate also soared all the way, an increase of 86.5%. In this case, the corresponding transfer of production costs will inevitably be triggered: one is to increase prices downstream, and the other is to use high-tech to reduce costs. It is difficult for enterprises to unify the price increase; only by choosing high-tech, otherwise they will not be able to cope wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J11/08C08G18/42C08G63/181
Inventor 赫长生沈峰邓煜东
Owner NANTONG GAOMENG NEW MATERIAL
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