Protective film composition and method for forming a metal surface using the protective film composition

Abstract

This invention relates to a protective film composition and a method for forming a metal surface layer using the protective film composition. The method involves mixing a monomer comprising 20% ​​to 75% by weight of β-carboxyethyl acrylate, a photoinitiator comprising 5% to 20% by weight, a colorant comprising 10% to 40% by weight, and a resin comprising 10% to 20% by weight to form the protective film composition. The protective film composition is then placed in a film-applying device, and a pretreatment solution is applied to a metal part. The film-applying device then applies the protective film composition to the metal part, followed by a first-stage curing process and a second-stage curing process on the surface of the metal part to complete the metal surface protective film. This technique increases the adhesion of the metal surface protective film, improves durability, and makes removal easier.

Claims

1. A protective film composition, comprising: The monomer system comprises 20% to 75% by weight, including β-carboxyethyl acrylate; 5% to 20% by weight of photoinitiator; 10% to 40% by weight of colorant; and 10% to 20% by weight of resin.

2. The protective film composition as claimed in claim 1, wherein the single system is at least one of tetrahydrofurfuryl acrylate, cyclotrimethylolpropane acetal acrylate, trimethylolcyclohexyl acrylate, ethoxyphenol acrylate, benzyl acrylate, o-phenylphenoxyethyl acrylate, 4-tert-butylcyclohexyl acrylate, dicyclopentenyl acrylate, N,N-dimethylacrylamide, and N-acrylomorpholine and N-vinylpyrrolidone.

3. The protective film composition as claimed in claim 1, wherein the photoinitiator is at least one of bis(2,4,6-trimethylbenzyl)phenylphosphine oxide, 2,4,6-trimethylbenzyl diphenylphosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butanone, 2-(4-methylbenzyl)-2-(dimethylamino)-1-(4-morpholinophenyl)-1-butanone, and 2,4-diethylthiazolinone and 2-isopropylthioxanthraphenone.

4. The protective film composition as claimed in claim 1, wherein the color paste system includes a dispersant and pigment powder.

5. The protective film composition as claimed in claim 1, wherein the resin is at least one of polyester resin, polyurethane resin, epoxy resin, vinyl chloride resin, rosin resin, marinic acid resin, and polyvinyl butyral resin.

6. A method for forming a metal surface layer, comprising: The protective film composition as described in claim 1 is disposed in an upper film device; A pretreatment solution is applied to a metal part; The film application device applies the protective film components onto the metal part; performs a first-stage curing action on the surface of the metal part; and performs a second-stage curing action on the surface of the metal part, wherein the curing time of the second-stage curing action is shorter than the curing time of the first-stage curing action, so as to complete a metal surface protective film.

7. The method for forming a metal surface layer as described in claim 6, wherein after the second stage curing action, the metal part can be machined, and the machined metal part can be immersed in a fluid while being subjected to ultrasonic vibration to cause the metal surface protective film to detach from the metal part.

8. The method for forming a metal surface as described in claim 7, wherein the ultrasonic vibration may be either warm water ultrasonic vibration or ultrasonic vibration of plastic with sodium cyanide solvent.

9. The method for forming a metal surface layer as described in claim 6, wherein the protective film composition is disposed on the metal part by inkjet printing or screen printing.

10. The method for forming a metal surface layer as described in claim 6, wherein the first stage curing action and the second stage curing action are performed using a photocuring device, and the photocuring device is capable of emitting ultraviolet light from 365 nm to 395 nm.

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