Temperature-resistant laminated steel pre-coating film adhesive and preparation method thereof

A technology of laminating iron and adhesives, applied in the direction of adhesive types, non-polymer adhesive additives, aldehyde/ketone condensation polymer adhesives, etc., can solve problems such as poor high temperature resistance and increase Effects of crosslinking density, crosslinking improvement, and heat resistance improvement

Active Publication Date: 2017-03-15
BEIJING COMENS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with ready-to-coat two-component adhesives, pre-coated adhesives have the problem of poor high temperature resistance after impact. At present, only two-component ready-to-coat adhesives can meet the requirements of high temperature resistance. The coating film is standard and boiled for 1 hour after 10J impact or 120°C for 10 minutes without separation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The embodiment of the present invention provides a kind of preparation method of adhesive for temperature-resistant laminating iron pre-coating film, is used for above-mentioned adhesive, takes each raw material according to above-mentioned formula, comprises the following steps:

[0034] Prepare main agent and curing agent respectively; Wherein,

[0035] The preparation main agent is:

[0036] Add polyester resin, epoxy resin, amino resin, silane coupling agent and ethyl acetate into the polyester kettle to make an ethyl acetate solution containing polyester resin, epoxy resin, amino resin and silane coupling agent. Main agent, the rotational viscosity of the main agent at 25°C is 200-400mPa·s, and the solid content is 25-35%;

[0037] Prepare curing agent as:

[0038] Mix low-molecular-weight polyols and ethyl acetate at 40°C evenly, then add isocyanate, heat up to 70-80°C and react for 3-4 hours, and after cooling down to room temperature, the ethyl acetate solutio...

Embodiment 1

[0049] The embodiment of the present invention provides an adhesive for a temperature-resistant laminated iron pre-coating film, which is composed of a main agent and a curing agent. The preparation method of the adhesive is as follows:

[0050] Prepare the main agent: first prepare the polyester resin used for the main agent: add 22.5 parts by weight of terephthalic acid, 14.3 parts by weight of isophthalic acid, 13 parts by weight of phthalic anhydride, 8.1 parts by weight of adipic acid, 10 parts by weight of Parts of ethylene glycol, 10.4 parts by weight of dihexanediol, 21.6 parts by weight of neopentyl glycol, 0.02 parts by weight of tetra-n-butyl titanate and 0.04 parts of triphenyl phosphite, stir well and heat up to 210-230 °C, After 6 hours of reaction, 11.6 parts by weight of distilled water, the acid value measured after the esterification is 17.6 mg KOH / g; MPa, pre-pumping for 1 hour in sequence, and the temperature of the kettle is controlled at 240-250°C; after ...

Embodiment 2

[0055] Prepare the main agent: first prepare the polyester resin used in the main agent: add 16.3 parts by weight of terephthalic acid, 19.5 parts by weight of isophthalic acid, 14.1 parts by weight of phthalic anhydride, 10 parts by weight of adipic acid, 10.1 parts by weight of Parts by weight of ethylene glycol, 8.7 parts by weight of dihexanediol, 22.2 parts by weight of neopentyl glycol, 0.02 parts by weight of tetra-n-butyl titanate and 0.04 parts by weight of triphenyl phosphite, stir well and heat up to 210-230 °C , reacted for 6 hours, distilled 12.0 parts by weight of water, and the acid value measured after the esterification was 16.2mgKOH / g; MPa, sequentially pre-pumping for 1 hour, the temperature of the kettle is controlled at 240-250°C; after the pre-pumping is completed, a long-term vacuuming operation is carried out, the vacuum degree reaches -0.1MPa, the long-term pumping time is 6.5 hours, and the weight of distilled alcohol is 6.5 parts by weight; The hydro...

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Abstract

The invention discloses a temperature-resistant laminated steel pre-coating film adhesive and a preparation method thereof. The adhesive is formed by mixing a main agent and a curing agent in a mass ratio of (40-60) to1, wherein the main agent is an ethyl acetate solution containing polyester resin, epoxy resin, amino resin and a silane coupling agent; the rotary viscosity of the main agent at the temperature of 25 DEG C is 200-400mPa s, and the solid content is 25-35%; the hydroxyl value of the polyester resin contained in the main agent is 6-11mg KOH/g, and the softening point is 90-110 DEG C; the curing agent is an ethyl acetate solution containing an isocyanate prepolymer, the rotary viscosity of the curing agent at the temperature of 25 DEG C is 1000-3000mPa s, and the solid content is 73-77%. The wound pre-coating film avoids after-tack, a laminated steel product adopting the pre-coating film achieves the effect of no edge warping in case of cup drawing for 9mm, does not delaminate after 10J impact, resists salt fog so as not to bubble after 240h, particularly does not delaminate even if being boiled in water for 1h after the impact, and resists the temperature of 120 DEG C for 10min after the impact so as not to delaminate. The application requirements of laminated steel are met.

Description

technical field [0001] The invention relates to the field of temperature-resistant adhesives, in particular to a two-component polyurethane adhesive for high-temperature-resistant laminated iron precoating films 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 coated iron prepared in this way has the dual characteristics of plastic film and metal plate. Compared with printed iron products, laminated iron products are more beautiful, with better hand feeling, corrosion resistance, rust resistance, weather resistance, deep drawing resistance and wear resistance. [0003] Comparing with the traditional film-coated iron-coating process, this process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J167/02C09J163/00C09J161/32C09J11/06C08G63/183
CPCC08G63/183C08L2201/08C08L2205/03C09J11/06C09J167/02C08L63/00C08L61/32C08K5/5435C08K5/544
Inventor 郑涛赫长生
Owner BEIJING COMENS NEW MATERIALS
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