JP2017226763A5

JP2017226763A5 -

Info

Publication number: JP2017226763A5
Application number: JP2016123734A
Authority: JP
Filing date: 2016-06-22
Publication date: 2018-02-22
Anticipated expiration: 2036-06-22

Description

そこで、本発明者らは、前記諸問題点を解決することを技術的課題とし、試行錯誤的な数多くの試作・実験を重ねた結果、分子量が8000〜12000のアルカリ溶解性アクリル樹脂6〜15重量％とオールアクリル型アクリル樹脂含有エマルション5〜12重量％とアルカリ性水溶液50重量％以上と顔料とを含有する水性塗料であれば、常温〜300℃の広い温度幅の鉄鋼材に強力に付着して変色せず、速乾性があり、鉄鋼材同士の摩擦によっても剥がれ難い塗膜強度を有し、雨水等によって塗膜が溶けないから印字されたマーク等が消え難く、また、印字装置の細いノズルを使用してマーキングしたとしてもドットが滲まずに鮮明であると共にノズルが目詰まりし難く、しかし、目詰まりした際にはアルカリ性水溶液によって簡単に解消できる水性塗料になり、しかも、該水性塗料と該水性塗料の乾燥塗膜溶解剤は共に揮発性有機溶剤を使用しないため、人体や環境に与える負荷が少ない水性塗料及び該水性塗料の乾燥塗膜溶解剤になるという刮目すべき知見を得て、本発明を完成させた。
Therefore, the present inventors made it a technical problem to solve the above-mentioned problems, and as a result of many trial and error trial manufactures and experiments, the alkali-soluble acrylic resins 6 to 15 having a molecular weight of 8000 to 12000 were obtained. If it is a water-based paint that contains 5% to 12% by weight of an emulsion containing 5% by weight, all acrylic acrylic resin, 50% by weight or more of an alkaline aqueous solution, and a pigment, it strongly adheres to steel materials with a wide temperature range from room temperature to 300 ° C. The coating does not discolor, is quick-drying, has a coating strength that does not easily peel off due to friction between steel materials, and the coating marks do not melt due to rainwater, etc. nozzle hardly clogged with use of nozzles, which are also clear without bleeding dots as the marked, however, when clogging becomes water-based paint that can be easily eliminated by an alkaline aqueous solution, In addition, since both the water-based paint and the dry paint film dissolving agent of the water-based paint do not use a volatile organic solvent, the water paint and the dry paint film dissolving agent of the water-based paint have a low load on the human body and the environment. The knowledge which should be obtained was acquired and this invention was completed.

アルカリ溶解性アクリル樹脂が6重量％に満たないと、水性塗料の粘度が低くなり過ぎて、印字装置を用いてマーキングした際のドットが不鮮明になり、また、15重量％よりも多ければ、300℃の鉄鋼材に印字した際に変色するためである。
If the alkali-soluble acrylic resin is less than 6% by weight, the viscosity of the water-based paint becomes too low, resulting in unclear dots when marking with a printing device. This is because the color changes when printed on a steel material at ℃.

本発明に係る水性塗料は、常温〜300℃の広い温度幅の鉄鋼材に強力に付着して変色せず、速乾性があり、鉄鋼材同士の摩擦によっても剥がれ難く、また、雨水等によって乾燥塗膜が溶解しないので印字されたマークが消え難く、また、印字装置の細いノズルを使用してマーキングを行ったとしてもドットが滲まずに鮮明に印字できると共にノズルが目詰まりし難く、しかし、目詰まりした際にはアルカリ性水溶液によって簡単に解消できる水性塗料であり、しかも、該水性塗料及び該水性塗料の乾燥塗膜溶解剤は共に揮発性有機溶剤を使用しないため、人体や環境に与える負荷が少ない水性塗料及び該水性塗料の乾燥塗膜溶解剤である。
よって、本発明は産業上の利用可能性の高い発明である。 The water-based paint according to the present invention strongly adheres to a steel material having a wide temperature range from room temperature to 300 ° C. and does not discolor, has a quick drying property, is not easily peeled off by friction between steel materials, and is dried by rainwater or the like. Since the coating does not dissolve, the printed marks are hard to disappear, and even if marking is performed using a thin nozzle of the printing device, the dots can be clearly printed and the nozzles are not clogged, A water-based paint that can be easily removed with an alkaline aqueous solution when clogged, and the water-based paint and the dry paint dissolving agent of the water-based paint do not use a volatile organic solvent. Is a water-based paint with a small amount of water and a dry paint film dissolving agent for the water-based paint.
Therefore, the present invention is highly industrially applicable.