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Anti-flaming ultraviolet radiation solidifying coating for metal

A technology of curing coatings and ultraviolet light, which is applied to coatings and devices for coating liquid on the surface, etc., which can solve the problems of large shrinkage stress, poor adhesion, and flammability of the coating film, and achieve improved adhesion and good resistance. Burning effect, strong adhesion effect

Inactive Publication Date: 2010-02-10
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional solvent-based coatings contain a large amount of volatile organic compounds (VOCs), which are very harmful to the human body and cannot meet the requirements of environmental protection
Ultraviolet curing (UV) coatings developed in recent years have the characteristics of high efficiency, energy saving, environmental protection, resource saving, and aesthetics. They are widely used in various fields of society and are known as green industrial products. However, UV curing generally suffers from poor adhesion and easy Defects such as burning
The rapid curing of UV coatings determines that its coating film has a large shrinkage stress and poor adhesion, especially on the dense and smooth metal coating surface formed by vacuum evaporation.
In order to solve this problem, people usually dissolve the inert resin with good adhesion in the active diluent to make a photocurable coating, but the inert resin itself cannot participate in the curing, which reduces the bonding density of the coating and affects the coating. Membrane Mechanical Properties
For example, the Chinese patent application whose publication number is CN 1803942A discloses a kind of UV-curable coating for metal coating surface protection, which adopts a mixture of thermoplastic acrylic resin and cellulose resin (composite adhesion-promoting resin) in the coating to increase The adhesion of the paint film on the surface of the metal substrate; however, its application range is limited due to the flammability of the resin in its raw material
In addition, the Chinese patent application with the publication number CN 1718657A discloses a flame-retardant UV-curable polyurethane acrylic coating and its preparation method. The coating is mainly composed of modified diphenylmethane diisocyanate, double bond-containing Made of modified polyols of melamine-phenolic resin, etc.; but the adhesion of the coating, especially on the metal surface, is still not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This example is the preparation of maleic anhydride-modified phosphorus-containing polyurethane acrylate, one of the main raw materials of the UV-curable coating of the present invention, and the method is as follows:

[0036] Take 50 grams of phosphoric acid aqueous solution with a mass percentage concentration of 85% in a three-necked flask, under the protection of argon, add 255 grams of propylene oxide dropwise under ice bath and stirring conditions, then slowly rise to room temperature for 2 hours, and remove by rotary evaporation. Water and unreacted propylene oxide yielded 223 grams of phosphate trihydric alcohols;

[0037] Add 50 grams of the above-mentioned phosphate trihydric alcohol in the reaction bottle, then add 60 mg of dibutyltin dilaurate as a catalyst, add 60 grams of diphenylmethane diisocyanate and 25 grams of acrylate-β-hydroxypropyl ester dropwise under stirring (The molar ratio of phosphate triol, diphenylmethane diisocyanate, and acrylate-β-hydro...

Embodiment 2

[0040] The composition and preparation method of the present embodiment ultraviolet curing coating are as follows respectively:

[0041] Composition (both parts by weight proportioning, the same below):

[0042]60 parts of active oligomer, 21 parts of reactive diluent, 1.2 parts of adhesion promoter,

[0043] 1.8 parts of photoinitiator, 14 parts of diluent, 0.3 parts of auxiliary agent

[0044] Wherein, the reactive oligomer is the maleic anhydride-modified phosphorus-containing polyurethane acrylate B obtained in Example 1; the reactive diluent is acrylate-β-hydroxyethyl ester and isobornyl acrylate, which are 12 parts and 9 parts respectively. parts; adhesion promoter is EB168; photoinitiator is 2-hydroxy-2-methyl-1-phenylacetone; additives include leveling agent EFKA3883 and defoamer EFKA2527, respectively 0.2 and 0.1 parts; dilution Agents are tetrahydrofuran, xylene and propylene glycol butyl ether, respectively 7 parts, 4 parts and 3 parts.

[0045] Preparation metho...

Embodiment 3

[0048] The composition and preparation method of the present embodiment ultraviolet curing coating are as follows respectively:

[0049] composition:

[0050] 25 parts of reactive oligomers, 24 parts of reactive diluents, 2.4 parts of adhesion promoters,

[0051] 1.2 parts of photoinitiator, 18 parts of diluent, 0.5 parts of auxiliary agent

[0052] Wherein, the reactive oligomer is the maleic anhydride modified phosphorus-containing urethane acrylate B obtained in Example 1; the reactive diluent is methacrylate-β-hydroxyethyl ester and propoxylated neopentyl glycol diacrylate , respectively 10 and 14 parts; adhesion promoter is EM39; photoinitiator is benzoin dimethyl ether; additives include leveling agent DEGO410 and defoamer EFKA2022, respectively 0.3 and 0.2 parts; diluent is acetic acid Ethyl ester, toluene and ethylene glycol butyl ether acetate, respectively 8 parts, 4 parts and 6 parts.

[0053] Preparation method:

[0054] Get 25 gram active oligomers (the phosph...

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PUM

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Abstract

The invention discloses a flame retardant UV curing coating for metal , which essentially consists of active oligomer, active diluent, adhesion promoter, photo initiator, diluent etc., and the weightratio of each component is: 20-70 portion of active oligomer, 20-60 portion of active diluent, 1-10 portion of adhesion promoter, 0.4-2 portion of photo initiator, and 6-20 portion of diluent, whereinthe active oligomer is phosphorus-containing polyurethane acrylate active oligomer modified by maleic anhydride, and the active diluent is compound containing 1-6 alkenyl unsaturated double bonds. The UV curing coating of the invention has strong metal-surface adhesion, which can avoid the defects of flammability of resin-like curing coatings.

Description

technical field [0001] The invention belongs to the technical field of ultraviolet curing coatings, in particular to a flame-retardant ultraviolet curing coating suitable for metals. Background technique [0002] Metal corrosion is ubiquitous in various fields, which not only causes economic losses, but also may cause safety accidents. At present, various coatings are often used to form a dense protective film on the metal surface, so that the metal can be effectively protected. Traditional solvent-based coatings contain a large amount of volatile organic compounds (VOCs), which are harmful to the human body and cannot meet the requirements of environmental protection. Ultraviolet curing (UV) coatings developed in recent years have the characteristics of high efficiency, energy saving, environmental protection, resource saving, and aesthetics. They are widely used in various fields of society and are known as green industrial products. However, UV curing generally suffers f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/00B05D7/14
Inventor 张华西曾健王晓东廖炯李荣
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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