Special varnish for musical instruments and preparation method thereof

Abstract

The invention discloses special varnish for musical instruments and a preparation method thereof. The special varnish for the musical instruments is a four-component coating; a PE (polyethylene) coating and a PU (polyurethane) coating are combined in the formula and give full play of respective advantages, and the defects of single use of the coatings are avoided, thus solving the defects in single use of the conventional products for musical instrument manufacturers. The special varnish has the advantages of high hardness up to over 2H, excellent fullness, good color change property, no greening property of PE, polishability and thickened viscosity for 5 seconds within 2 hours, thus solving the problem of use time of a single PE component. The special varnish for the musical instruments can be sprayed by an electrostatic machine, can be widely applied to the musical instruments such as a guitar, a loudspeaker box, a piano and the like, and has good comprehensive property and good constructability, thus being beneficial to large-scale popularization.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a special clear finish paint for musical instruments and a preparation method thereof. Background technique [0002] At present, PU topcoat or PE topcoat is used in the musical instrument market, but there are many defects in the application process: PU topcoat is composed of resin (component B, containing -OH group) and curing agent (component A, Containing -NCO group) is formed by reacting in a certain proportion. It is a two-component coating. The hardness of this type of paint cannot reach the hardness of musical instruments, so PU topcoats often encounter hardness that cannot reach customers when applied to musical instruments. Requirements; PE topcoat is composed of straight-chain polyester resin containing unsaturated double bonds (C=C), and then diluted with monomers. This coating is composed of initiator (white water) and accelerator ( In the presence of blue water), t...

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Problems solved by technology

[0002] At present, PU topcoat or PE topcoat is used in the musical instrument market, but there are many defects in the application process: PU topcoat is composed of resin (component B, containing -OH group) and curing agent (component A, Containing -NCO group) is formed by reacting in a certain proportion. It is a two-component coating. The hardness of this type of paint cannot reach the hardness of musical instruments, so PU topcoats often encounter hardness that cannot reach customers when applied to musical instruments. Requirements; PE topcoat is composed of straight-chain polyester resin containing unsaturated double bonds (C=C), and then diluted with monomers. This coating is composed of initiator (white water) and accelerator ( In the presence of blue water), the insoluble and insoluble paint film that can be cross-linked and transformed into a network structure belongs to multi-component coatings. This paint film has high hardness, and the topcoat can reach 2H or more. Maintain the fullness of the paint film for a long time. After polishing the dry film, you can get a high-gloss mirror effect. The dry film is stable and has good performance in one aspect, but it is prone to discoloration, pinholes, and short service life on musical instruments.

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