JP5204961B2 - Treatment composition and repair method - Google Patents
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本発明は、既設の熱硬化系塗材上に、熱硬化系塗材重層可能にする処理用組成物及びそれを用いた改修方法に関するものである。 The present invention relates to a treatment composition that enables a thermosetting coating material to be layered on an existing thermosetting coating material, and a repair method using the same.
既設床等の改修においては、基礎コンクリートが歪み、亀裂が生じておらす、既存塗り床等の下地への密着が十分であれば、下地、既存塗材を残した方が、すなわち、塗り床等の塗材への重ね塗りで、美観復活や経時的塗膜の磨耗・劣化によものは回復することができる。これにより、材料費の削減の他、大幅な工期を短縮できる。従来この既設部への改修する場合、ポリッシャー等で機械的なサンディング処理をした後に、プライマー処理、上塗り工程を行い、改修していた。上記、サンディング処理は粉塵を発し、プライマー処理、養生時間を含め、決して容易な工程ではなかった。 In refurbishment of existing floors, the foundation concrete is distorted and cracked, and if there is sufficient adhesion to the ground, such as the existing floor, it is better to leave the ground and the existing coating material. By re-coating the coating material such as the above, it is possible to recover the aesthetic restoration and wear / deterioration of the coating film over time. As a result, in addition to reducing material costs, the construction period can be greatly shortened. Conventionally, when renovating the existing part, after mechanical sanding with a polisher or the like, primer treatment and overcoating are performed. The above sanding process generates dust and is not an easy process including primer treatment and curing time.
従来、既設床に対して強固な補強を求めたものであり、躯体周辺のコンクリート部の改修工法が開示されている（特許文献１）。旧塗膜を溶解、膨潤軟化させることなく塗装補修することができる塗り床用下塗塗料組成物を開示されている（特許文献２）。さらに、有機溶剤として所定構造式で示すアミド系物質と共にＨＬＢが少なく共７以上の界面活性剤を併用したことを特徴とする水溶性剥離剤組成物を開示されている（特許文献３）。いずれも前記既設物に対する開示内容は既設物をそのままに重ねて上塗りをするものではない。 Conventionally, a strong reinforcement is sought for an existing floor, and a method for repairing a concrete portion around a frame has been disclosed (Patent Document 1). An undercoating composition for undercoating that can be applied and repaired without dissolving or swelling and softening the old coating film is disclosed (Patent Document 2). Furthermore, a water-soluble release agent composition characterized in that an organic solvent and an amide-based substance represented by a predetermined structural formula are used together with a surfactant having a low HLB and 7 or more is disclosed (Patent Document 3). In any case, the disclosed contents for the existing objects do not cover the existing objects as they are.
本発明者は特願２００６−１９５３７０号で密着阻害となるエポキシ塗材のアミンブラッシングの除去及び組成物を開示した。
解決しようとする課題は、既設熱硬化系塗材上にさらに熱硬化系塗材を重層塗装するに際し、サンディング等の機械的処理なく、また、密着性を改善するプライマー等の余分な処理することなくできることである。 The problem to be solved is that there is no mechanical treatment such as sanding, and extra treatment such as a primer that improves adhesion when applying a further layer of thermosetting coating on the existing thermosetting coating. It can be lost.
請求項１の発明は、Ａ）Ｎ，Ｎ−ジメチルホルムアミド、Ｎ，Ｎ−ジエチルホルムアミド、Ｎ−メチル−２−ピロリドン、Ｎ，Ｎ−ジメチルアセトアミド、Ｎ，Ｎ−ジエチルアセトアミドのうちから選ばれた単独或いは複数の溶剤とＢ）Ａ乃びアミド基を有する溶剤以外の溶剤とから構成され、Ａ：Ｂの重量比が５０：５０〜８０：２０の混合溶剤であり、混合溶剤の溶解度パラメータＳＰ値が９〜１２の処理用組成物であって、既設熱硬化系塗材上に、研磨処理及び樹脂含有前処理剤を使用せず、処理用組成物で拭い、熱硬化系塗材を重層して、応力を加えても剥離しないことを特徴とする処理用組成物であり、これによりサンディング等の機械的処理なく、プライマーの乾燥及び硬化を待つことなく、熱硬化系塗材に仕上げすることができる。
請求項２の発明は 請求項１に記載の熱硬化系塗材が、エポキシ樹脂系、ウレタン樹脂系塗材であることを特徴とする請求項1に記載の処理用組成物であり、さらに十分な密着力を持って、サンディング等の機械的処理なく、プライマー等の余分な処理することなく、熱硬化系塗材に仕上げすることができる。
請求項３の発明は既設熱硬化系塗材上に研磨処理及び樹脂含有前処理剤を使用せず、請求項１乃至２に記載の処理用組成物で拭い、熱硬化系塗材を重層塗装する改修方法であり、粉塵を発するサンディング工程やプライマー工程を省くことができ、粉塵発生がなく、作業を軽くすることができ、工期を短縮できる。
The invention of claim 1 is selected from A) N, N-dimethylformamide, N, N-diethylformamide, N-methyl-2-pyrrolidone, N, N-dimethylacetamide, and N, N-diethylacetamide. is composed of a solvent other than the solvent with a single or a plurality of solvent and B) a 乃beauty amide group, a: a weight ratio of B is 50: 50-80: a 20 solvent mixture of the mixed solvent solubility parameter SP a treatment composition values 9-12, layered over existing thermoset based coating material, without using a grinding process and a resin-containing pretreatment agent, wiped with the treatment composition, a thermosetting system coating material Thus, it is a composition for treatment that does not peel even when stress is applied, and thereby finishes a thermosetting coating material without mechanical treatment such as sanding and without waiting for the primer to dry and cure. Can Yes.
The invention according to claim 2 is the treatment composition according to claim 1, wherein the thermosetting coating material according to claim 1 is an epoxy resin-based or urethane resin-based coating material. With high adhesion, it can be finished into a thermosetting coating material without mechanical treatment such as sanding and without extra processing such as primer.
The invention of claim 3 does not use a polishing treatment and a resin-containing pretreatment agent on the existing thermosetting coating material, wipes with the processing composition of claims 1 to 2, and coats the thermosetting coating material in a multilayer coating. This is a renovation method that eliminates the dusting sanding process and primer process, eliminates the generation of dust, lightens the work, and shortens the construction period.
本発明は、Ａ）Ｎ，Ｎ−ジメチルホルムアミド、Ｎ，Ｎ−ジエチルホルムアミド、Ｎ−メチル−２−ピロリドン、Ｎ，Ｎ−ジメチルアセトアミド、Ｎ，Ｎ−ジエチルアセトアミドのうちから選ばれた単独或いは複数の溶剤とＢ）Ａ乃びアミド基を有する溶剤以外の溶剤とから構成され、Ａ：Ｂの重量比が５０：５０〜８０：２０の混合溶剤であり、混合溶剤の溶解度パラメータＳＰ値が９〜１２の処理用組成物であって、既設熱硬化系塗材上に、研磨処理及び樹脂含有前処理剤を使用せず、処理用組成物で拭い、熱硬化系塗材を重層して、応力を加えても剥離しないことを特徴とする処理用組成物で、既設熱硬化系塗材上に、研磨処理及び樹脂含有前処理剤を使用せず、熱硬化系塗材を重層可能にする。これによりサンディング等の機械的処理なく、樹脂含有前処理剤を使用しないことによる乾燥、養生時間を不要とし、熱硬化塗材を重層でき、容易に仕上げすることができる。プライマー処理は塗材の塗布前に密着向上等の目的で樹脂或いは樹脂溶液による処理であり、本発明と対比的な表現として、プライマー処理を樹脂含有前処理剤処理と言う。また、明細書内でのプライマーはこれを言う。なお前記樹脂は、エボキシ系樹脂、ウレタン系樹脂の他、シリコーン、チタン、アルミニウム系等のカップリング機能を有するものを言う。 In the present invention, one or more selected from A) N, N-dimethylformamide, N, N-diethylformamide, N-methyl-2-pyrrolidone, N, N-dimethylacetamide, N, N-diethylacetamide It is composed of a solvent and B) a solvent other than the solvent with a 乃beauty amide group, a: a weight ratio of B is 50: 50 to 80: a 20 mixed solvent of solubility parameter SP value of the solvent mixture is 9 a treatment composition of 12, on existing heat-curable coating material, without using a grinding process and a resin-containing pretreatment agent, wiped with the treatment composition, and overlaid with a thermosetting system coating material, in treatment composition characterized in that it does not peel even if stressed, on existing heat-curable coating material, without using a grinding process and a resin-containing pretreatment agent, allowing overlaid with a thermosetting system coating material . Thereby, there is no mechanical treatment such as sanding, and drying and curing times are eliminated by not using the resin-containing pretreatment agent, and the thermosetting coating material can be overlaid and finished easily. The primer treatment is treatment with a resin or a resin solution for the purpose of improving adhesion before application of the coating material, and as a contrasting expression with the present invention, the primer treatment is referred to as resin-containing pretreatment agent treatment. Also, the primer in the specification refers to this. The resin refers to a resin having a coupling function such as silicone, titanium, aluminum, etc. in addition to an epoxy resin and a urethane resin.
アミド基を有する溶剤（アミド系溶剤と言う）としてはＮ，Ｎ‐ジメチルホルムアミド、Ｎ−メチル−２−ピロリドン、Ｎ，Ｎ−ジメチルアセトアミドなどがあげることができ、沸点は １３０〜２５０℃が好ましく、さらに好ましくは１５０〜２１０℃である。中でも Ｎ−メチル−２−ピロリドンが毒性もなく、好ましい。明確な作用は判らないが、熱硬化系塗材のある微局所部位がアミド基を有する溶剤で、既設塗材表面から遊離し、微視的浸食され、重層密着が可能となっていると思われる。熱可塑性樹脂が結合材となっている塗材においては、この溶剤が、膨潤、溶解まで進み、重層は不可能となる。アミド基系溶剤が２０％未満であると、その他の溶剤（非アミド系溶剤と言う）が、微視的浸食を阻害し、効果が薄れるもの思われる。５０％以上が最も好ましい。混合時の溶解度パラメータＳＰ値が９〜１２の条件はこの微視的浸食を効果的に進めるものと思われる。
アミド系溶剤は水と混合可能であるが、その他溶剤としては非水溶或いは限度のある水溶解性のもので、アミド系溶剤を単独で使用する場合、最も浸食するものの、８０％超では指触乾燥に関係する表面再付着がある。アミド系溶剤と非アミド系溶剤の混合が乾燥性に寄与している。アミド系溶剤５０％以上では付着性は劣らない。非アミド系溶剤としてはｎ−ブチルアルコール、キシレン、トルエン、メチルエチルケトン、メチルシクロヘキサン等があげられる。
非アミド系溶剤が単一溶剤で構成し、全体に対する比率が４０〜６０％である時はＳＰ値が、８．５以上の溶剤を使用することが望ましい。８．５未満であるとアミド系溶剤との相溶に欠け分離し易い。また非アミド系溶剤が２以上の混合溶剤の場合はこの混合溶剤がＳＰ値が９〜１２であることが好ましい。
Examples of the solvent having an amide group (referred to as an amide solvent) include N, N-dimethylformamide, N-methyl-2-pyrrolidone, N, N-dimethylacetamide, and the boiling point is preferably 130 to 250 ° C. More preferably, it is 150-210 degreeC. Of these, N-methyl-2-pyrrolidone is preferred because it is not toxic. Although the clear effect is not known, it seems that a micro-local site with a thermosetting coating material is a solvent having an amide group, is released from the surface of the existing coating material, is microscopically eroded, and can adhere to multiple layers. It is. In a coating material in which a thermoplastic resin is a binder, this solvent advances to swelling and dissolution, and multiple layers are impossible. When the amide group-based solvent is less than 20%, other solvents (referred to as non-amide solvents) inhibit microscopic erosion and the effect seems to be reduced. 50% or more is most preferable. The condition where the solubility parameter SP value during mixing is 9 to 12 seems to advance this microscopic erosion effectively.
Although amide solvent is miscible with water, as other solvents that of certain water-solubility of water-insoluble or limits, when using the amide solvent alone, although the most erosion touch than 80% in the finger There is surface redeposition related to drying. Mixing of amide solvents and non-amide solvents contributes to drying properties. Adhesiveness is not inferior when the amide solvent is 50% or more. Non-amide solvents include n-butyl alcohol, xylene, toluene, methyl ethyl ketone, methyl cyclohexane and the like.
When the non-amide solvent is composed of a single solvent and the ratio to the whole is 40 to 60%, it is desirable to use a solvent having an SP value of 8.5 or more. If it is less than 8.5, it is likely to be separated due to lack of compatibility with the amide solvent. When the non-amide solvent is a mixed solvent of 2 or more, this mixed solvent preferably has an SP value of 9-12.
健康被害への影響が大きい、屋内での使用ではキシレン、トルエンを排除するのが好ましい。処理用組成物は作業性、すなわち、処理後早期に乾燥した方が、異物付着の除去が容易であり、加重平均沸点は乾燥性の点で９４〜１８４℃が好ましい。 It is preferable to exclude xylene and toluene for indoor use, which has a great impact on health hazards. The treatment composition is easier to work with, that is, if it is dried earlier after the treatment, foreign matter adhesion is easier to remove, and the weighted average boiling point is preferably 94 to 184 ° C. in terms of drying property.
付着性の観点からはアミド系溶剤が２０％以上でよく、好ましくは５０％以上であり、付着性と作業性を両立できる最も好ましい範囲は５０％〜７０％である。 From the viewpoint of adhesion, the amide solvent may be 20% or more, preferably 50% or more, and the most preferable range in which both adhesion and workability are compatible is 50% to 70%.
本発明の熱硬化系塗材とは架橋性の樹脂を含んだ塗材を言う（常温等で硬化するものも含む）。エポキシ系樹脂、ウレタン系樹脂の結合材とするもので、ビヒクル、充填剤、熱可塑性樹脂も改質剤として含んでも構わない。エホキシ系樹脂としては、アミン系、アミド系、アミンアミド系硬化剤を用いるものをあげることができる。ウレタン系樹脂としては、ポリオールとポリイソシアネートを結合材とするもので、ビヒクル、充填剤、熱可塑性樹脂も改質剤として含んでも構わない。硬化形態として、塗装前に２液を混合して使用するもの、１液であり湿気硬化するものなどがあげられる。
熱硬化性樹脂塗材のうち、不飽和ポリエステル系樹脂、エポキシアクリレート系樹脂、アクリル系樹脂、フッ素系樹脂、アミノ系樹脂は架橋度、界面張力等から作用が一般的には困難なものとしてあげられる。
本発明の応用は主に建築の仕上げに関するもので、耐久性、耐食性等の点から主に、床で、塗り床として 熱硬化系塗材が使用される。壁材等は前者ほど、耐食、耐久は要求されず、使用頻度は低い。
本発明の処理用組成物が既設熱硬化系性塗材に対して効果を奏するのは、前記の通りであるが、密着性等十分な性能が得られるために、既設硬化塗材と重層塗装する熱硬化塗材が、同一分類に属していることが好ましい。前記は全く同じ組成・樹脂分類を意味するのではなく配合上、近い、類似しているものは密着性は良いし、内部ストレスが働かなく好ましい。
The thermosetting coating material of the present invention refers to a coating material containing a crosslinkable resin (including those that cure at room temperature). The binder is an epoxy resin or urethane resin, and a vehicle, a filler, or a thermoplastic resin may also be included as a modifier. Examples of the ethoxy resin include those using an amine, amide, or amine amide curing agent. The urethane resin uses a polyol and a polyisocyanate as a binder, and may contain a vehicle, a filler, and a thermoplastic resin as a modifier. Examples of the form of curing include those used by mixing two liquids before coating, and one liquid that is moisture-cured.
Among thermosetting resin coating materials, unsaturated polyester resins, epoxy acrylate resins, acrylic resins, fluorine resins, and amino resins are generally considered difficult to work due to the degree of crosslinking, interfacial tension, etc. It is done.
The application of the present invention mainly relates to finishing of buildings, and mainly from the viewpoint of durability, corrosion resistance, etc., a thermosetting coating material is used as a coating floor. As for the wall material, etc., corrosion resistance and durability are not required and the frequency of use is low.
As described above, the treatment composition of the present invention has an effect on the existing thermosetting coating material. However, in order to obtain sufficient performance such as adhesion, the existing curing coating material and multilayer coating are obtained. It is preferable that the thermosetting coating material to belong to the same classification. The above does not mean exactly the same composition / resin classification, but those that are close and similar in terms of blending are preferable because of good adhesion and no internal stress.
溶解度パラメータについてはＪ． Ａｐｐｌ． Ｐｏｌｙｍ． Ｓｃｉ．， ５（１５）， ３３９ （１９６１） 、ＳＰ値基礎・応用と計算方法（著者 山本秀樹 （株）情報機構発行）等を参照し、混合物の溶解度パラメータＳＰ値は容積平均である。なお、単位はｃａｌ系（ｃａｌ／ｃｍ３）１／２で ＳＩ系（Ｍｐａ）１／２から変換するには０．４８８８８を掛ける。 For solubility parameters, see J.H. Appl. Polym. Sci. , 5 (15), 339 (1961), SP value basics / applications and calculation methods (authored by Hideki Yamamoto Co., Ltd.), etc., and the solubility parameter SP value of the mixture is a volume average. The unit is cal system (cal / cm 3 ) 1/2 and is converted to 0.48888 to convert from SI system (Mpa) 1/2 .
以下、実施例、参考例、比較例をあげて、詳細な説明をする。なお、説明がないものは重量部で表す。 Hereinafter, examples, reference examples, and comparative examples will be described in detail. Those not described are expressed in parts by weight.
実施例１〜３０、参考例１〜１５
表１及び２に示す配合にて、各評価を行った。なお実施例１〜１２については、表１、２の評価の他、既設塗材と重層する塗材を表４の組み合わせで行い、全て、付着性試験（段落００２５で、塗材組み合わせは異なるが塗布量は同じ）は◎の結果となり、処理用組成物で拭うことにより、同一樹脂以外でも効果を奏することを確認した。
Examples 1 30 Reference Example 15
Each evaluation was performed using the formulations shown in Tables 1 and 2. For Examples 1 to 12 , in addition to the evaluations in Tables 1 and 2, the coating materials that overlap with the existing coating materials were performed in the combinations in Table 4, and all adhesion tests (paragraph 0025, coating material combinations differ) The coating amount was the same), and the result was ◎, and by wiping with the treatment composition, it was confirmed that the same resin was effective.
比較例１〜６
表２に示す配合にて、各評価を行った。
Comparative Examples 1-6
Each evaluation was performed with the formulation shown in Table 2.
比較例７
実施例の既設塗材の表面を拭う代わりに、（表１下欄段落００２４で記した）既設塗材の表面をポリッシャーＰ１２高速（リンナイ）で研磨処理する以外は実施例と同じで、各評価を行った。但し、指触乾燥性は評価を行わなかった。結果は表２に示す。
Comparative Example 7
Instead of wiping the surface of the existing coating material of the example, the evaluation is the same as the example except that the surface of the existing coating material (described in paragraph 0024 in the lower column of Table 1) is polished at a polisher P12 high speed (Rinnai). Went. However, the dryness to touch was not evaluated. The results are shown in Table 2.
比較例８
実施例の既設塗材の表面を拭う代わりに、エポキシプライマー（アイカ工業製、ＪＥ−２５７０ ビスフェノールＡ型エポキシ樹脂、変性ポリアミドアミン系溶剤形、固形分約３０％）を短毛ローラーにて塗布量０．２ｋｇ／ｍ２塗布後、２３℃相対湿度５０％条件下２時間静置した以外は実施例と同じで、各評価を行った。結果は表２に示す。
Comparative Example 8
Instead of wiping the surface of the existing coating material of the example, an epoxy primer (manufactured by Aika Kogyo Co., Ltd., JE-2570 bisphenol A type epoxy resin, modified polyamidoamine solvent type, solid content of about 30%) is applied with a short hair roller After the application of 0.2 kg / m 2 , each evaluation was performed in the same manner as in Example except that the sample was allowed to stand for 2 hours at 23 ° C. and 50% relative humidity. The results are shown in Table 2.
比較例９
実施例の既設塗材の表面を拭う代わりに、ウレタンプライマー（アイカ工業製、ＪＵ−１２７０、ウレタンプレポリマー 固形分約３５％、湿気硬化型）を短毛ローラーにて塗布量０．２ｋｇ／ｍ２塗布後、２３℃相対湿度５０％条件下２時間静置した以外は実施例と同じで、各評価を行った。結果は表２に示す。
Comparative Example 9
Instead of wiping the surface of the existing coating material of the example, a urethane primer (manufactured by Aika Kogyo, JU-1270, urethane prepolymer solid content of about 35%, moisture-curing type) is applied with a short-hair roller to a coating amount of 0.2 kg / m after 2 coating, except for standing 23 ° C. and 50% relative humidity conditions for 2 hours the same as in examples were each evaluated. The results are shown in Table 2.
比較例１０
比較例７の研磨処理を行った後に、比較例８の処理（プライマー）を行った以外は実施例と同じで、各評価を行った。結果は表２に示す。
Comparative Example 10
After performing the polishing process of Comparative Example 7, each evaluation was performed in the same manner as in Example except that the process (primer) of Comparative Example 8 was performed. The results are shown in Table 2.
比較例１１
比較例７の研磨処理を行った後に、比較例９の処理（プライマー）を行った以外は実施例と同じで、各評価を行った。結果は表２に示す。
Comparative Example 11
Each evaluation was performed in the same manner as in Example except that the polishing treatment of Comparative Example 7 was followed by the treatment (primer) of Comparative Example 9. The results are shown in Table 2.
その他の比較結果
表２の比較例の他、メチルアルコール、エチルアルコール、イソプロピルアルコール、ｎ−ブタノール、メチルシクロヘキサン、ｎ−ヘキサン、シクロヘキサン、トルエン、キシレン、メチルエチルケトン、アセトン等の単独溶剤にて、実施例（表１）と同じ評価を行ったが、いずれも付着性評価は×、指触乾燥性は○、総合評価は×の結果となった。
Other Comparative Results In addition to the comparative examples shown in Table 2, Examples were carried out using a single solvent such as methyl alcohol, ethyl alcohol, isopropyl alcohol, n-butanol, methylcyclohexane, n-hexane, cyclohexane, toluene, xylene, methyl ethyl ketone, and acetone. Although the same evaluation as (Table 1) was performed, in all cases, the evaluation of adhesion was x, the dryness to touch was ○, and the overall evaluation was x.
表１、２に実施例、表２に比較例の配合と評価結果、溶解度パラメータＳＰ値を示す。なお パラメータ算出の基となる溶解度パラメータＳＰ値、スペックを表３に示す。 Tables 1 and 2 show examples, and Table 2 shows the composition and evaluation results of comparative examples and solubility parameter SP values. Table 3 shows solubility parameter SP values and specifications that are the basis for parameter calculation.
実施例・比較例で使用した塗材は下記である。
Ａ：無溶剤形エポキシ樹脂塗床材（アイカ工業（株）製ＪＥ−２５２０厚膜用、ビスフェノールＡエポキシ樹脂、変性脂肪族ポリアミン系、無溶剤形）
Ｂ：溶剤形エポキシ樹脂塗床材（アイカ工業（株）製ＪＥ−２５１０薄膜用、ビスフェノールＡエポキシ樹脂、変性脂肪族ポリアミン系固形分約６２％）
Ｃ：無溶剤形硬質ウレタン樹脂塗床材（アイカ工業（株）製、ＪＪ−１０３、変性ポリオール、ポリメックＭＤＩ系硬質無溶剤形）
Ｄ：溶剤形アクリルウレタン樹脂塗床材（アイカ工業（株）製ＪＵ−１２８５、アクリルウレタンポリオール、変性ポリイソシアネート系 固形分約５４％溶剤形）
The coating materials used in the examples and comparative examples are as follows.
A: Solvent-free epoxy resin flooring material (for JE-2520 thick film manufactured by Aika Kogyo Co., Ltd., bisphenol A epoxy resin, modified aliphatic polyamine, solvent-free)
B: Solvent type epoxy resin coating material (for JE-2510 thin film manufactured by Aika Kogyo Co., Ltd., bisphenol A epoxy resin, modified aliphatic polyamine solid content of about 62%)
C: Solvent-free hard urethane resin coating material (manufactured by Aika Kogyo Co., Ltd., JJ-103, modified polyol, Polymerc MDI hard hard solvent-free type)
D: Solvent-type acrylic urethane resin coating material (JU-1285, manufactured by Aika Kogyo Co., Ltd., acrylic urethane polyol, modified polyisocyanate type, solid content about 54% solvent type)
試験方法
既設塗材の作成法
スレート板（１５ｃｍ×１５ｃｍ×４ｍｍ厚み）に各材料基材にＡ〜Ｄ（Ａ：１．０ｋｇ／ｍ２、Ｂ：０．２ｋｇ／ｍ２、Ｃ：１．５ｋｇ／ｍ２、Ｄ：０．２ｋｇ／ｍ２）塗布し、２３℃ 相対湿度５０％環境下で、７日間静置し、それぞれ、超促進耐候性試験機であるアイスーパーＵＶテスター（岩崎電気（株）製、結露型ＳＵＶ−Ｗ１５１）にて、Ａ〜Ｄの各樹脂に紫外線照射６時間結露４時間をサイクルとして、２０サイクル処理し、既設塗材とした。
指触乾燥評価
上記、既設塗材を表に示す配合物を、ウエスに含浸させ、既設塗材の表面を拭い、２３℃、相対湿度５０％下３０分後指蝕で評価した。
基準は下記のようにした。
◎：べとつきなし。
○：問題ないレベルであるが、僅かにあり。
△：若干べとつきあり。
×：かなりべとつきあり。
付着性試験
上記、表面を拭ってから、２３℃、相対湿度５０％下１時間後、既設塗材と同塗材Ａ〜Ｄ（Ａ：１．０ｋｇ／ｍ２、Ｂ：０．２ｋｇ／ｍ２、Ｃ：１．５ｋｇ／ｍ２、Ｄ：０．２ｋｇ／ｍ２）塗布し、２３℃ 相対湿度５０％環境下で、７日間静置し、それぞれの試験体試験体の塗膜表面上にダイアモンドカッターで切り目を入れ、切り目部分から皮スキを用い角度４５度から応力を加え、付着性を確認した。
◎：良好（応力を加え続けても剥離しない）
○：容易に剥離しない（応力を加え続けると若干剥離する）
△：若干剥離箇所有り（部分的に剥離する）
×：付着していない（界面で容易に剥離）
総合評価
上記、評価を実際の使用に対して判断した。
◎：全てに優れている。
◇：指触乾燥以外、優れている。
○：使用に耐える。
×：不十分である。
Test method Preparation method of existing coating material A to D (A: 1.0 kg / m 2 , B: 0.2 kg / m 2 , C: 1.) on each material substrate on a slate plate (15 cm × 15 cm × 4 mm thickness). 5kg / m 2, D: 0.2kg / m 2) was applied, under 23 ° C. and 50% relative humidity environment, and allowed to stand for 7 days, respectively, eye Super UV tester is super accelerated weathering tester (Iwasaki Electric A resin (condensation type SUV-W151) was subjected to 20 cycles of each resin A to D with 6 hours of ultraviolet irradiation and 4 hours of condensation as a cycle to obtain an existing coating material.
Evaluation of Drying to Touch The above-mentioned formulation showing the existing coating material was impregnated into a waste cloth, the surface of the existing coating material was wiped, and evaluation was performed by finger-corrosion after 30 minutes at 23 ° C. and 50% relative humidity.
The standard was as follows.
A: No stickiness
○: Level of no problem, but slightly.
Δ: Slightly sticky
X: There is quite stickiness.
Adhesion test After wiping the surface as described above, the coating materials A to D (A: 1.0 kg / m 2 , B: 0.2 kg / m) after 1 hour at 23 ° C. and 50% relative humidity 2, C: 1.5kg / m 2 , D: 0.2kg / m 2) was applied, under 23 ° C. and 50% relative humidity environment, and allowed to stand for 7 days, on the coating film surface of each test specimen specimen A cut was made with a diamond cutter and stress was applied from an angle of 45 degrees using a leather skin from the cut portion to confirm adhesion.
A: Good (does not peel even if stress is continuously applied)
○: not easily peeled off (slightly peels off when stress is continuously applied)
Δ: Slightly peeled off (partially peeled off)
X: Not adhered (easily peeled off at the interface)
Overall Evaluation The above evaluation was judged for actual use.
A: Excellent for all.
◇: Excellent except for dry touch.
○: Withstand use.
X: Inadequate.
試験方法・評価方法は表１と同じ。 The test method and evaluation method are the same as in Table 1.
表４のＡ〜Ｄは段落００２４、実施例・比較例に使用したものと同じである。 A to D in Table 4 are the same as those used in Paragraph 0024, Examples and Comparative Examples.
本発明は、従来既設塗材を除去或いは研磨処理していたものを処理用組成物を拭うことにより、付着性を確保できるものであり、処理用組成物で膨潤・溶解をする熱可塑性バインダーによる塗材を除き、塗床、壁等に適応できる。また、従来のプライマー組成を配合することにより、熱硬化系塗材への適応性が広がる。 The present invention can secure adhesion by wiping the treatment composition after removing or polishing the existing coating material, and is based on a thermoplastic binder that swells and dissolves with the treatment composition. Except for coating materials, it can be applied to floors and walls. Moreover, the adaptability to a thermosetting coating material spreads by mix | blending the conventional primer composition.
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