JP3484546B2 - Powder coating composition - Google Patents

Powder coating composition

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JP3484546B2
JP3484546B2 JP31888193A JP31888193A JP3484546B2 JP 3484546 B2 JP3484546 B2 JP 3484546B2 JP 31888193 A JP31888193 A JP 31888193A JP 31888193 A JP31888193 A JP 31888193A JP 3484546 B2 JP3484546 B2 JP 3484546B2
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epoxy resin
powder coating
crystalline
coating composition
present invention
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JPH07138502A (en
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由起子 山田
秀安 朝蔭
恭幸 武田
潔 渡辺
正良 花房
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東都化成株式会社
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【発明の詳細な説明】 【0001】 【産業上の利用分野】本発明は溶融時粘度が低く流れ性が良好で、且つ耐ブロッキング性に優れ、耐熱性等の物性に優れた粉体塗料組成物に関するものである。 BACKGROUND OF THE INVENTION [0001] BACKGROUND OF THE INVENTION This invention is a good low flowability when molten viscosity, and excellent blocking resistance, the powder coating composition having excellent properties such as heat resistance it relates to things. 【0002】 【従来の技術及び発明が解決しようとする課題】エポキシ樹脂は機械特性、電気特性に優れ、粉体塗料にも広く使用されている。 BACKGROUND OF SUMMARY OF THE INVENTION Epoxy resins mechanical properties, excellent electrical properties, are widely used in powder coating. しかしモータや発電機における回転子コイルの含浸や固着に用いる場合、通常の非結晶性エポキシ樹脂、例えばビスフェノールA型エポキシ樹脂、あるいはノボラック型エポキシ樹脂等は流れ性が悪く微細な空隙間に浸透しにくく、また流れ性を良くするためにエポキシ樹脂の分子量を小さくすると塗料の耐ブロッキング性が低価する。 However, when used in the impregnation and fixing of the rotor coil in the motor and generator, it penetrates conventional non-crystalline epoxy resins, such as bisphenol A type epoxy resin, or novolac type epoxy resin or the like to deteriorate the fine air gap flowability Nikuku also Decreasing the molecular weight of the epoxy resin in order to improve the flowability blocking resistance of the coating is low-priced. 【0003】また結晶性エポキシ樹脂は溶融時の粘度が著しく低い特徴を有しているが融点が比較的低い、例えばハイドロキノンジグリシジルエーテル(エポキシ当量118g/eq、融点105℃)、テトラメチルビフェノールジグリシジルエーテル(エポキシ当量196g/ [0003] Crystalline epoxy resin viscosity upon melting has a significantly lower characteristics but relatively low melting point, for example, hydroquinone diglycidyl ether (epoxy equivalent 118 g / eq, melting point 105 ° C.), tetramethyl biphenol di glycidyl ether (epoxy equivalent 196 g /
eq、融点105℃)等は非結晶性硬化剤と押出し機等で溶融混合すると、結晶性が失われ粘着性を有し室温で粉砕が不可能なものとなり実用上使用できない。 eq, the melting point 105 ° C.) such as melt-mixing in a non-crystalline curing agent and an extruder or the like, the crystallinity is lost can not be practically used now as that can not be crushed at room temperature tacky. 【0004】この結晶性エポキシ樹脂の問題を解決する方法として特開平4−288317号では結晶性エポキシ樹脂以外の成分を溶融ブレンドし、冷却、粉砕したのち初めて結晶性エポキシ樹脂を加え、微粉砕しさらに結晶性エポキシ樹脂の融点より低い温度で再度加熱し、冷却、微粉砕して粉体塗料を得るものであり、得られた粉体塗料の耐ブロッキング性と流れ性の整合性は取れているが生産工程があまりに煩雑で作業性、生産性、エネルギーコストの点で不利である。 [0004] The components other than the crystalline epoxy resin melt blended in Japanese Patent Laid-Open No. 4-288317 as a method of solving the problem of the crystalline epoxy resin, it cooled, the first crystalline epoxy resin After pulverizing added, finely ground further heated again at a temperature below the melting point of the crystalline epoxy resin, cooled, comminuted is intended to obtain a powder coating, blocking resistance and fluidity of the integrity of the resulting powder coating is 0.00 There production process is too complicated and workability, productivity, is disadvantageous in terms of energy costs. 【0005】 【課題を解決する為の手段及び作用】本発明はエポキシ樹脂の上記問題点を解決したもので、耐熱性等の物性に優れた粉体塗料組成物を提供するものである。 [0005] According and operation for solving the problems] The present invention solves the above problems of the epoxy resin, there is provided a powder coating composition having excellent properties such as heat resistance. 即ち本発明は、エポキシ樹脂として一般式〔1〕(化2)で示される2,5−ジ−t−ブチルハイドロキノンとエピクロルヒドリンとの反応で得られるエポキシ当量180g/ That is, the present invention has the general formula as the epoxy resin [1] (of 2) shown are 2,5-di -t- butyl hydroquinone epoxy resulting from the reaction of epichlorohydrin equivalent of 180 g /
eq以下、示差走査熱量計(DSC)により昇温速度1 eq or less, heating rate 1 by differential scanning calorimetry (DSC)
0℃/minで測定した融点が140℃以上である結晶性エポキシ樹脂、非結晶性硬化剤及び無機充填剤よりな 0 ° C. / min with measured crystalline epoxy resin having a melting point of 140 ° C. or more fat, I than non-crystalline curing agent and an inorganic filler
る樹脂組成物を非結晶性硬化剤の軟化温度より約10℃ That the resin composition from about 10 ° C. above the softening temperature of the non-crystalline curing agent
高い温度で溶融混練し冷却後粉砕されたことを特徴とする粉体塗料組成物である。 A powder coating composition characterized that it has been pulverized melt-kneaded and cooled at a high temperature. 【化2】 ## STR2 ## 〔式中nは0〜2である。 [Wherein n is 0-2. 〕 【0006】本発明組成物においては結晶性エポキシ樹脂が、エポキシ当量180g/eq以下、示差走査熱量計 (以下DSCと略)により昇温速度10℃/min ] [0006] Crystalline epoxy resin in the present invention composition, the following epoxy equivalent 180 g / eq, a differential scanning calorimeter (hereinafter DSC approximately) by heating rate 10 ° C. / min
で測定した融点が140℃以上であり、非結晶性硬化剤が、軟化点の範囲が50℃〜120℃のものからなる粉体塗料組成物であることが好ましい。 In and a measured melting point of 140 ° C. or higher, a non-crystalline curing agent is preferably the range of the softening point of the powder coating composition consisting of those of 50 ° C. to 120 ° C.. 【0007】本発明で使用できる結晶性エポキシ樹脂は2,5−ジ−t−ブチルハイドロキノンとエピクロルヒドリンとを水酸化ナトリウム等のアルカリ触媒の存在下で反応させて製造されるものであり、特にエポキシ当量が180g/eq以下で、DSCにより昇温速度10℃ [0007] Crystalline epoxy resins which can be used in the present invention are those which are prepared by reacting epichlorohydrin 2,5-di -t- butyl hydroquinone in the presence of an alkali catalyst such as sodium hydroxide, in particular an epoxy in equivalent 180 g / eq or less, heating rate 10 ° C. by DSC
/minで測定した融点が140℃以上のものが好ましい。 / Melting point measured by min is preferably not less than 140 ° C.. 【0008】エポキシ当量が180g/eq以上の場合、すなわち一般式〔1〕で示されるn=1以上の高分子化物が多量に含まれる場合、及び/またはハロゲン含有化合物、グリコール含有化合物、原料の2,5−ジ− [0008] When the epoxy equivalent is more than 180 g / eq, i.e. if n = 1 or more polymeric compound represented by the general formula (1) contains a large amount, and / or halogen-containing compounds, glycol-containing compounds, the feedstock 2,5-di -
t−ブチルハイドロキノンの未反応物等の不純物が多量に含まれる場合、エポキシ樹脂の結晶性が低下すると共に融点も低下し、これを使用した塗料は耐ブロッキング性が不良となるばかりか、硬化物の耐熱性等の諸物性を低下させる。 If impurities of unreacted products of t- butyl hydroquinone contains a large amount, falls melting point with the crystalline epoxy resin is lowered, not only paints blocking resistance becomes poor using this, the cured product such heat resistance lowers the physical properties of the. 【0009】本発明で用いるもう一方の成分である非結晶性硬化剤は軟化点の範囲が50℃〜120℃、好ましくは60℃〜100℃のもので、硬化温度でエポキシ基と反応して強固な硬化物を形成し得る官能基を有する化合物であり、具体的にはカルボキシル基末端ポリエステル類、フェノール、クレゾール、ビスフェノールA等のフェノール類とホルムアルデヒド、ベンズアルデヒド等のアルデヒド類との縮合反応で得られたノボラック型フェノール類、両末端にフェノール性水酸基を有する線状フェノール樹脂類等が挙げられる。 [0009] Another non-crystalline curing agent ranges of softening point is 50 ° C. to 120 ° C., which is the one of the components used in the present invention, preferably those of 60 ° C. to 100 ° C., by reacting with epoxy groups at a curing temperature a compound having a functional group capable of forming a strong cured product, resulting specifically carboxyl terminated polyesters, phenol, cresol, a condensation reaction of a phenol and formaldehyde, aldehydes such as benzaldehyde, such as bisphenol a obtained novolak type phenol, linear phenolic resins or the like having a phenolic hydroxyl group at both terminals. 中でもノボラック型フェノール樹脂が特に好ましい。 Among them, phenolic novolak resins are particularly preferred. 【0010】本発明の粉体塗料組成物中には上記した必須成分である結晶性エポキシ樹脂、及び非結晶性硬化剤の他に必要に応じて従来公知の非結晶性エポキシ樹脂、 [0010] The present invention of the powder coating in the composition is an essential ingredient in the crystalline epoxy resin, and amorphous optionally other curatives conventionally known non-crystalline epoxy resin,
例えばビスフェノールA型エポキシ樹脂、フェノールノボラック型エポキシ樹脂、クレゾールノボラック型エポキシ樹脂等を本発明の効果を損なわない程度に配合することができる。 Such as bisphenol A type epoxy resins, phenol novolak type epoxy resin, a cresol novolak type epoxy resin can be blended in limits that do not impair the effect of the present invention. また充填剤、硬化促進剤、更に必要に応じて種々の添加剤を配合することができる。 The fillers, curing accelerator, can contain various additives as necessary. 【0011】充填剤としては例えばシリカ粉末、アルミナ粉末、マグネシア粉末、炭酸カルシウム等の無機充填剤等が挙げられ、硬化促進剤としては、例えばイミダゾール類、第3級アミン類、尿素誘導体を配合することができる。 [0011] For example silica powder as a filler, an alumina powder, magnesia powder, include inorganic fillers such as calcium carbonate, as a curing accelerator, for example imidazoles, tertiary amines, blending urea derivatives be able to. その他添加剤としては、例えば有機顔料、無機願料、難燃剤、流れ性調整剤等が挙げられる。 Other additives, such as organic pigments, inorganic Application fee, flame retardants, flowability adjusting agents and the like. 【0012】本発明の粉体塗料組成物において、エポキシ樹脂に対する硬化剤の配合割合はエポキシ基1当量当り、硬化剤の官能基が0.5〜1.5当量好ましくは0.8〜1.2当量の割合である。 [0012] In the powder coating composition of the present invention, mixing ratio of the curing agent to the epoxy resin is an epoxy group per equivalent of 0.5 to 1.5 equivalents, preferably functional groups of the curing agent 0.8-1. 2 is a ratio of equivalents. 【0013】 本発明の粉体塗料組成物を製造する方法としては、所定の組成比に選んだ原料成分を粉体状で混合し、微砕する、いわゆるドライブレンド法はもとより、非結晶性硬化剤の溶融温度で混練し、冷却固化後、 [0013] As a method for producing a powder coating composition of the present invention can be prepared by mixing the ingredients chosen to predetermined composition ratio in a powder form to fine powder crushing, so-called dry blend method, as well as non-crystalline kneaded at a melting temperature of the curing agent, it cooled and solidified,
微粉砕する溶融ブレンド法によつても目的とする耐ブロッキング性の良好な粉体塗料を得ることができる。 Even cowpea the melt blending method of milling can be obtained blocking resistance good powder coating of interest. 特に非結晶性硬化剤への結晶性エポキシ樹脂の分散註、あるいは充填剤、顔料、硬化促進剤の分散性、さらには硬化物物性の面から後者の溶融ブレンド法が有利である。 Especially dispersion Note the crystalline epoxy resin to the non-crystalline curing agent or filler, a pigment, dispersibility of the curing accelerator, and further is advantageous latter melt blending method from the viewpoint of physical properties of the cured product. 【0014】本発明の粉体塗料組成物を溶融ブレンド法で製造する一例を挙げれば、所定の組成比に選んだ原料成分をヘンシェルミキサーによつて十分混合したのち、 [0014] In one example of producing a powder coating composition of the present invention by melt blending method, after thorough mixing Te cowpea Henschel mixer ingredients chosen at a predetermined composition ratio,
エクストルーダー等で非結晶性硬化剤の軟化点よりも高い温度で、且つ結晶性エポキシ樹脂の融点より20℃好ましくは30℃以下の温度で混練し、冷却後、微粉砕し、ついで所望粒径に分級して製品とする。 At a temperature higher than the softening point of the non-crystalline curing agent in an extruder or the like, and then kneaded 20 ° C. preferably at 30 ° C. less than the melting point of the crystalline epoxy resin, after cooling, finely ground, and then the desired particle size the product binary classified to. 【0015】本発明の粉体塗料組成物は溶融時粘度が非常に低いので、微細空隙内に浸透しやすく、コイルの固着用粉体塗料等として非常に有用なものである。 [0015] Since the powder coating composition of the present invention has a very low melt viscosity at, easily penetrates into the microvoids, is very useful as anchoring powder coating or the like of the coil. また本発明の粉体塗料組成物の塗装方法としては静電塗装と予熱しての塗装がある。 As coating method of the powder coating composition of the present invention have a coating of preheated and electrostatically coated. 静電塗装としては静電流動浸漬法、静電スプレー法等があり、予熱しての塗装としては流動浸漬法、ホットスプレー法等がある。 Electrostatic fluidized bed coating method as electrostatic coating, there is an electrostatic spraying method, the coating of preheated fluidized immersion method, there is a hot spray method. 次に、実施例により本発明を更に詳細に説明するが、本発明はこれら実施例によつて限定されるものではない。 Next, a more detailed explanation of the present invention through examples, the present invention is not intended to be by connexion limited to these examples. 【0016】 実施例1 結晶性エポキシ樹脂として、エポキシ当量173g/e [0016] As Example 1 crystalline epoxy resin, epoxy equivalent 173 g / e
q、融点148℃の2,5−ジ−t−ブチルハイドロキノンジグリシジルエーテル〔結晶性エポキシ樹脂A− q, mp 148 ° C. 2,5-di -t- butyl hydroquinone diglycidyl ether [crystalline epoxy resin A-
1、n= 0.043 〕と、非結晶性硬化剤として水酸基当量105g/eq、軟化点86℃のフェノールノボラック樹脂(商品名「ショウノールBRG557」、昭和高分子(株)製)〔非結晶性硬化剤B−1〕と、充填剤としてシリカ粉末、硬化促進剤として2−メチルイミダゾール、添加剤としてアクリル酸エステルオリゴマーを表1に示す割合でへンシェルミキサーで予備混合し、次いでエクストルーダーで非結晶性硬化剤の軟化温度より約10℃高い温度で混練し、冷却後微粉砕して目的とする粉体塗料を得た。 1, n = 0.043 and], non-hydroxyl as a crystalline curing agent equivalent 105 g / eq, softening point 86 ° C. of phenol novolac resin (trade name "Shonol BRG557", manufactured by Showa Kobunshi Co.) [noncrystalline and sexual hardener B-1], silica powder, 2-methylimidazole as a curing accelerator, an acrylic acid ester oligomer premixed in a Henschel mixer to in proportions shown in Table 1 as an additive as a filler, followed by an extruder in kneaded at about 10 ° C. higher temperature than the softening temperature of the non-crystalline curing agent, to obtain a powder coating of interest and cooled milling. 【0017】 実施例2 結晶性硬化剤として、水酸基当量120g/eq、軟化点98℃のo−クレゾールノボラック樹脂(「D− [0017] As Example 2 amorphous curing agent, hydroxyl equivalent 120 g / eq, softening point 98 ° C. of o- cresol novolac resin ( "D-
5」、東都化成(株)製)〔非結晶性硬化剤B−2〕を用い、表1に示す割合で配合した以外は実施例1と同様にして粉体塗料を得た。 5 ", manufactured by Tohto Kasei using Ltd.) [non-crystalline curing agent B-2] was except that in proportions shown in Table 1 in the same manner as in Example 1 to obtain a powder coating. 【0018】 実施例3 結晶性エポキシ樹脂として、エポキシ当量178g/e [0018] Example 3 crystalline epoxy resin, epoxy equivalent 178 g / e
q、融点141℃の2,5−ジ−t−ブチルハイドロキノンジグリシジルエーテル〔結晶性エポキシ樹脂A− q, mp 141 ° C. 2,5-di -t- butyl hydroquinone diglycidyl ether [crystalline epoxy resin A-
2、n= 0.079 〕を用い、表1に示す割合で配合した以外は実施例1と同様にして粉体塗料を得た。 2, n = 0.079] with and except that in proportions shown in Table 1 in the same manner as in Example 1 to obtain a powder coating. 【0019】 比較例1 結晶性エポキシ樹脂として、エポキシ当量200g/e [0019] Comparative Example 1 crystalline epoxy resin, epoxy equivalent 200 g / e
q、融点132℃の2,5−ジ−t−ブチルハイドロキノンジグリシジルエーテル〔結晶性エポキシ樹脂A− q, mp 132 ° C. 2,5-di -t- butyl hydroquinone diglycidyl ether [crystalline epoxy resin A-
3、n= 0.237 〕を用い、表1に示す割合で配合した以外は実施例1と同様にして粉体塗料を得た。 3, n = 0.237] with and except that in proportions shown in Table 1 in the same manner as in Example 1 to obtain a powder coating. 【0020】比較例2 結晶性エポキシ樹脂として、エポキシ当量196g/e [0020] As Comparative Example 2 crystalline epoxy resin, epoxy equivalent 196 g / e
q、融点105℃のテトラメチルビフェノールジグリシジルエーテル〔結晶性エポキシ樹脂A−4〕を用い、表1に示す割合で配合した以外は実施例1と同様にして製造を行つたが、エクストルーダーで混練したものは室温で粘着性を有し、粉砕できなかつた。 q, using a tetramethyl biphenol diglycidyl ether of melting point 105 ° C. [crystalline epoxy resin A-4], but other than that in proportions shown in Table 1, having conducted the production in the same manner as in Example 1, an extruder those kneading tacky at room temperature, has failed can crushed. このものをマイナス50℃で冷凍粉砕し、粉体塗料を得た。 The thing was freeze pulverization minus 50 ° C., to obtain a powder coating. 【0021】比較例3 結晶性エポキシ樹脂の代わりに非結晶性エポキシ樹脂として、エポキシ当量650g/eq、軟化点85℃のビスフェノールA型エポキシ樹脂〔商品名「YD−01 [0021] As non-crystalline epoxy resin in place of Comparative Example 3 crystalline epoxy resin, epoxy equivalent 650 g / eq, a softening point of 85 ° C. bisphenol A type epoxy resin [trade name "YD-01
2」、東都化成(株)製)とエポキシ当量210g/e 2 ", manufactured by Tohto Kasei Co., Ltd.) and an epoxy equivalent of 210g / e
q、軟化点75℃のo−クレゾールノボラックエポキシ樹脂(商品名「YDCN−702」、東都化成 (株) q, a softening point of 75 ℃ of o- cresol novolac epoxy resin (trade name "YDCN-702", manufactured by Toto Kasei Co., Ltd.
製)を用い、表1に示す割合で配合した以外は実施例1 Using Ltd.), except that in proportions shown in Table 1 in Example 1
と同様にして粉体塗料を得た。 To obtain a powder coating in the same manner as. 【0022】各調整した粉体塗料について諸物性を調べたところ表1のとおりであつた。 [0022] Atsuta in as shown in Table 1 were examined various physical properties for each adjustment and powder coating. 表1における物性の測定法と評価法は下記のとおりである。 Measurement and Evaluation of physical properties in Table 1 are as follows. 【0023】耐ブロッキング性試料を40℃の恒温槽の中に10日間入れたのちブロッキングの状態を調べた。 The conditions were examined for blocking after placed for 10 days in a constant temperature bath of blocking resistance samples 40 ° C.. ○・・・塊状物にはならず流動性がある△・・・大きな塊状物とはならないが流動性はない×・・・塊状物となり流動性がない【0024】流れ性粉体塗料0.5gを採取し常温で100kg/cm の圧力で直径13mmのタブレットを作成した。 ○ ··· lumps there is a liquidity does not become △ but ... not a big lumps there is no liquidity becomes × ··· lumps not liquidity [0024] The flow of powder coating 0. you create a tablet with a diameter of 13mm at a pressure of 100kg / cm 2 at room temperature were taken 5g. このタブレットを傾斜角が30°に調整された軟鋼板にセットし、160℃のオーブン中に放置して塗料の流れた距離を測定し、次式により流れ性を求めた。 The tablet inclination angle is set to a mild steel plate which is adjusted to 30 °, then allowed to stand in 160 ° C. in an oven and measuring the distance of flow of the paint was determined flowability by the following equation. 【0025】ガラス移転温度 (Tg) 各粉体塗料を180℃で2時間硬化させて、硬化物のT [0025] In a glass transition temperature (Tg) of the powder coating is cured 2 hours at 180 ° C., T of the cured product
MA曲線の変曲点からTgを求めた。 It was determined the Tg from the inflection point of the MA curve. 【0026】表1に示した結果から明らかに、本発明による実施例より得られた粉体塗料組成物は粉体塗料として有用な性能を有することがわかる。 [0026] apparent from the results shown in Table 1, powder coating composition obtained from Examples according to the present invention is found to have useful properties as powder coatings. 【表1】 [Table 1] 【0027】 【発明の効果】本発明の粉体塗料組成物は溶融時粘度が低く流れ性が良好で、且つ耐ブロッキング性に優れ、耐熱性等の物性にも優れたものである。 The powder coating composition of the present invention exhibits an excellent low flowability when molten viscosity, and excellent blocking resistance and is also excellent in physical properties such as heat resistance. また結晶性エポキシ樹脂として上述した特定の性状を有する樹脂を用いることで、特殊な方法を取らずに従来慣用の製造方法で生産可能となり、作業性、生産性、エネルギーコストの点で有利である。 Further, by using a resin having specific properties described above as crystalline epoxy resin enables production by conventional conventional manufacturing method without taking special way, workability, productivity, is advantageous in terms of energy costs .

───────────────────────────────────────────────────── フロントページの続き (72)発明者 山田 由起子 東京都江戸川区東葛西3丁目17−14 東 都化成株式会社中央研究所内(72)発明者 武田 恭幸 東京都江戸川区東葛西3丁目17−14 東 都化成株式会社中央研究所内 (56)参考文献 特開 平4−288317(JP,A) 特開 昭61−261371(JP,A) (58)調査した分野(Int.Cl. 7 ,DB名) C09D 1/00 - 10/00 C09D 101/00 - 201/10 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Yukiko Yamada Edogawa-ku, Tokyo Higashikasai 3-chome, 17-14 East Tokyo Kasei Co., Ltd. center within the Institute (72) inventor Takeda KyoMiyuki Edogawa-ku, Tokyo Higashikasai 3-chome 17 14 East Tokyo Kasei Co., Ltd. center within the Institute (56) reference Patent flat 4-288317 (JP, a) JP Akira 61-261371 (JP, a) (58 ) investigated the field (Int.Cl. 7, DB name) C09D 1/00 ​​- 10/00 C09D 101/00 - 201/10

Claims (1)

  1. (57)【特許請求の範囲】 【請求項1】 エポキシ樹脂として一般式〔1〕(化1)で示される2,5−ジ−t−ブチルハイドロキノンとエピクロルヒドリンとの反応で得られるエポキシ当量 (57) [Claims 1 epoxy resulting from the reaction of 2,5-di -t- butyl hydroquinone with epichlorohydrin of the formula as the epoxy resin [1] (Formula 1) equivalent
    180g/eq以下、示差走査熱量計(DSC)により 180 g / eq or less, by differential scanning calorimetry (DSC)
    昇温速度10℃/minで測定した融点が140℃以上 Is 140 ° C. above the melting point as measured at a Atsushi Nobori rate of 10 ° C. / min
    である結晶性エポキシ樹脂、非結晶性硬化剤及び無機充 In a crystalline epoxy resins, non-crystalline curing agent and an inorganic charge
    填剤よりなる樹脂組成物を非結晶性硬化剤の軟化温度よ The softening temperature of the non-crystalline curing agent resin composition comprising Hamazai
    り約10℃高い温度で溶融混練し冷却後粉砕されたことを特徴とする粉体塗料組成物。 Powder coating composition characterized that it has been pulverized melt-kneaded and cooled at about 10 ° C. higher temperatures Ri. 【化1】 [Formula 1] 〔式中nは0〜2である。 [Wherein n is 0-2. 〕 【請求項2】 請求項1記載の非結晶性硬化剤の軟化点 ] Wherein the softening point of the non-crystalline curing agent according to claim 1, wherein
    の範囲が50℃〜120℃である請求項1記載の粉体塗 Powder coating according to claim 1, wherein the range of a 50 ° C. to 120 ° C.
    料組成物。 Charge composition.
JP31888193A 1993-11-13 1993-11-13 Powder coating composition Expired - Fee Related JP3484546B2 (en)

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