TW531554B - Powder coating for cast iron pipe - Google Patents

Abstract

To obtain a powder coating material which has a low melt viscosity and a high fluidity and forms a pinholeless coating film having a uniform thickness without the necessity for elevating the curing temperature and without detriment to the adhesiveness, blocking resistance, external appearance, and corrosion resistance of the coating film by incorporating an epoxy resin (A) and an arylimidazoline compound (B) into the same.

Description

531554 Yinfan, the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Distillation A7 B7 V. Description of the Invention (1)-1 ~ [Technical Field of the Invention] The present invention relates to the manufacturing and use of powder coatings for cast iron pipes. [Knowledge technology and invention technical field] From the non-polluting nature of solvent-free, high-corruption, easy-to-mechanize, and rationality that can be generated by thick-layer coating film and heat-hardening and complete hardening, coating From the viewpoints of high economic efficiency and the like, powder coatings can be widely used for coating of various pipes, home appliances, metal furniture, and the like. In particular, the epoxy powder coating has excellent corrosion resistance, 'X f resistance / gluten resistance, chemical resistance, mechanical properties, and insulation properties, etc.', so it can be widely used for corrosion resistance, sanitation, and insulation. Specially requested areas. On the other hand, in the coated high-strength cast iron pipe, nests are easily generated on the inner surface of the cast iron pipe during casting, and because of the hydrostatic test performed during the manufacturing process, water will remain in the nest and on the surface of the pipe. When powder coating is performed by heating the cast iron pipe, the water remaining on the surface of the nest and the surface of the object to be coated will evaporate, and the coating layer heated and melted after coating will harden. This will cause holes to occur. This is because the epoxy resin has a low melting and melting degree, and its powder coating compound has poor fluidity when heated and melted. In order to solve the above problems, the melting temperature of the epoxy resin is reduced by increasing the coating temperature or the degree of heat hardening, or the low melting point epoxy resin is used to improve its fluidity. However, 'If you want to improve the fluidity and increase the hardening temperature, you must ① compare with the standard of 4 paper standards (please read the precautions on the back before filling in this page) • Faye. Consumption cooperative seal 531554 A7 --- B7___ V. Description of the invention (2) ~ '——-A large amount of heat energy will increase the cost of coating farmers; ② Increasing the curing temperature will increase the curing time of the resin composition Shortening and coating hardening step tube = difficult. If the hardening time is too short, it will lead to poor fluidity. On the other hand, using a lower melting point epoxy resin can improve fluidity, but it is easy to cause agglomeration. And coating management issues. Among the methods mentioned above, methods using crystalline epoxy resins are well-known as methods to improve fluidity. However, when using crystalline epoxy resins, the ability to improve fluidity cannot be fully exhibited. The effect 'and the occurrence of pores during the hardening of the cast iron pipe can not be avoided', and the appearance of the coating surface is poor. Furthermore, the obtained coating film has poor corrosion resistance. When the amount is significantly increased, the fluidity can be improved, but the water resistance and water resistance of the water are significantly reduced, and further, the appearance of the coating film is deteriorated. Furthermore, Japanese Patent Publication No. 62-35434 discloses a method using dry blending. By mixing calcium carbonate with a special surface treatment and a specific average particle diameter, and a long-chain aliphatic polyamide having a specific average particle diameter in an epoxy resin powder, the epoxy resin powder with good fluidity can be mixed to obtain An epoxy resin powder composition that does not clink under normal conditions, has a low viscosity when melted, and has high fluidity. However, in the above cases, it can be used for coils, laminated boards, and cosmetic boards. When used in cast iron pipes , Still can not get sufficient fluidity, and inferior anti-perforation effect, can not get a strong tight coating film 'because of the problem of remaining resistance, it can not be used for this purpose. 5 This paper size applies China National Standard (CNS) A4 specification (210X297 mm) (Please read the notes on the back before filling in this page j

A7 V. Description of the invention (j) :: Although the above excellent powder coating can be used as a hardening agent of adipic acid di, but when using the above hardening agent, the results [solve; powder coating for iron pipes Good flow properties. Its field is in the above-mentioned problem 'the purpose of the present invention is to provide a kind of official epoxy powder coating for cast iron' which does not destroy the advantages of epoxy powder coating (tightness, rhomboidity, appearance of coating film, secrecy), In addition, it is possible to obtain properties such as low melting dryness, excellent fluidity, excellent perforation prevention, and uniform coating film without increasing the curing temperature unnecessarily. It relates to a kind of powder coating for cast iron pipes, including: epoxy resin (A); and arylimide compound (B) (the scope of patent application item 1); the powder described in the scope of patent application item 1 In the body paint, the aryl compound (B) is a compound represented by the following general formula (I).

R

R

R 2 (Please read the notes on the back before filling out this page) Yin Fan, a consumer cooperative of the Bureau of Decision and Standards of the Ministry of Economic Affairs (where R ~ R5 is a hydrogen atom or a carbon atom of 1 ~ 9) (Scope of patent application Item 2); The powder coating according to item 1 or 2 of the scope of patent application, wherein the epoxy resin (A) is a combination of the amorphous epoxy resin (al) and the crystalline epoxy resin (a2) (No. 3 in the scope of patent application); This paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) A7 V. Description of the invention (4) '一 ~' —---- Yue Shen μ Patent Viewing Section The powder coating according to item 3, wherein the non-deposit. The daily epoxy resin (al) has a melting point of 80 to 120 as measured by the ring and ball method, and the point at 160 C is 100 poises or less and it is in the dove. . Those with a viscosity of less than 20 poises (item 4 in the scope of patent application); powder coatings described in Zhongming Patent | & 3 or 4; polystyrene conversion of the f crystalline epoxy resin in the basin The weight flat material ^ ϊ (Mw) to the number average molecular weight (Mn) ratio (Mw / Mn) is 20 ~ 3.5 (application patent scope item 5); powder coatings stated in the patent scope item 4 or 5 Wherein the non-crystalline epoxy resin (al) is a bisphenol epoxy resin (item 6 of the scope of patent application); the powder coating described in the scope of the patent application area 6, wherein the ring of the bisphenol epoxy resin The oxygen equivalent is 670 ~ 1500 g / eq (the 7th in the scope of patent application); the powder coating described in the 3, 4, 5, 6, or 7 in the scope of patent application, in which the non-crystalline epoxy resin ( al) / Crystalline epoxy resin (a2) The weight ratio is based on the ratio of non-crystalline epoxy resin (al) / crystalline epoxy resin (a2) = 80/20 ~ 99/1 (8th in the scope of patent application) Item); Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Application ^ The powder coatings described in item 1, 2, 3, 4, 5, or 6 of the patent scope, wherein the epoxy resin (A) and the arylimidazolium compound (B) are based on the equivalent reference ratio of epoxy resin (A) / arylimidazolium compound (B) = 1 · 〇 / 〇 · ΐ〇〜ι · 0 / 0 · 80 (item 9 of the scope of patent application). [Example of the invention] In order to further improve the fluidity and the prevention of perforation, the present invention uses the paper size to apply the Chinese National Standard (CNS) A4 specification (210 × 297 mm) 531554 A7. Five invention descriptions (5) =: =: 'Amorphous ring gas resin (, crystalline broad non-crystalline epoxy resin), the absolute value of the difference between glass transition Tg using T and measured by differential scanning calorimetry is greater than 1 (for rc or more, glass transition Point I Tm-Tg | > 1〇rc) ° Utilization. On the other hand, the crystalline epoxy resin (a2) is the melting point Tm measured by the% ball method, and the glass transition ftI measured by Lee; TI The difference between the absolute value of the difference in Tg of the glass transition point and the calorimetry method is less than 10.0, that is, the resin that meets the conditions of I Tm-Tg | ^ 10 (° 0). The above non-crystalline epoxy resin (a 〗) Epoxy resin for example body coatings. Specifically, double-working powder, double-phase F-type epoxy resin, four desert materials Α == 脂, 4tremor Βκ · # 衣 乳 树 月 月 and other double-age ring = 等 3lacquer _type epoxy =: _ type resin for lacquer; alicyclic epoxy resin ;: Consumer Work Cooperatives, Central Bureau of Standards, Ministry of Economic Affairs Printed with water-glycerin type epoxy resin; co-editing of the above epoxy resins, and resin parts of each of the above epoxy resins. Among the above, from the viewpoints of tightness, money resistance, fairness, and good knowledge 'Bisphenol epoxy resin is better.', 'Membrane appearance again' From the resistance to agglomeration resistance, easy coating point: Epoxy resin ⑷) solubility measured by the ring and ball method = 90 ~ 110. C is better. UC, I paper ruler (210X297 mm) JJ4 JJ4 Printed by the Consumer Standards Cooperative of the Central Standards Bureau of the Ministry of Dispatch A7 B7 V. Description of the invention (6) And the above-mentioned non-crystalline cyclochloride tree "ASP_M2 type Measured melting point. The viscosity of the τ 罝 crystalline epoxy resin (al) is preferably measured at a moving speed of 50 / sec. The viscosity is equal to or less than poise, and is preferably less than

叩 人 在 3 泊。 The viscosity at 200 ° C is less than 20 poise, and the cup helmet is feared. Dan is preferably less than 10 poise and more than 0.7 poise. Viscosity at 160 C is less than 100 poise, μ, A, less than 20, or 20 (TC viscosity is less than 20 poise, the fluidity is good, so the core of the core to make the appearance of the hardened coating film excellent Moreover, 'the powder coating becomes easy. Moreover, when the dryness of 160 force is 100 poise or less', and the # degree of t is 2G poise or less, and the condition of the refining point is 80 to 120 ° c is satisfied. , Excellent in fluidity and agglomeration resistance, and powder coating becomes easy. Moreover, the epoxy resin for powder coating for cast iron f, which is generally used as a main raw material, is at a level of 160 t; The viscosity should not be less than 3 poises, or in the range of 0. The viscosity should not be less than 0.7 poises. Furthermore, the weight average molecular weight of the non-crystalline epoxy resin (al) in terms of polystyrene is 4_ ~ _, and it is preferably 45〇〇 ～ hire. When the weight-average molecular weight is more than 4000, blocking resistance and impact resistance are improved ', and when it is less than 8,000, the dryness is reduced, and fluidity and perforation prevention are improved. In addition, the non-crystalline epoxy resin (a "is 1600 to 2500, and preferably 1800 to 2300 in terms of the average number of polystyrene knives. When the number average molecular weight (Mη) is 1600 or more Resistance to agglomeration and impact resistance (please read the precautions on the back before filling this page), installation, 11 9 Employees' Cooperatives, Central Standards Bureau, Ministry of Economic Affairs, Consumer Cooperatives, India 531554 A7 B7 5. Description of Invention (7) Good When it is less than 2500, the melt viscosity becomes low, and the fluidity and the perforation prevention property become better. Furthermore, the weight average molecular weight (Mw) / number average molecular weight (1 ^ 11) ratio, that is, ^ 1 \ ¥ / ] \ 411 is 2.0 ~ 3.5, preferably 2.2 ~ 2.7.] ^ 1 ~ / 1 ^ 11 If it is in the above range, the melt viscosity will be low and the fluidity will be improved. Furthermore, it will be resistant to agglomeration and resistance. From the viewpoints of impact resistance, easy coating of powder, and prevention of perforation, the preferred epoxy equivalent of the bisphenol-type epoxy resin used is 670 to 1500 g / eq. That is, the equivalent epoxy equivalent is 67 Og / Above eq, the property of agglomeration and financial impact will be improved. On the other hand, when the epoxy equivalent is below 1500g / eq, not only the melting point In addition to making powder coatings easier, melt viscosity is also lowered, and fluidity and perforation prevention are improved. Furthermore, from the viewpoint of the above-mentioned performance balance, the epoxy equivalent is preferably 740 to 1200 g / eq. Furthermore, from the viewpoint of impact resistance, the epoxy equivalent is preferably 790 to 1000 g / eq, and especially from the viewpoint of impact resistance, flexibility, and tightness / epoxy equivalent is preferably 810 to 900g / eq 〇 In order to make the epoxy equivalent to the above-mentioned preferable range, a combination of two or more non-crystalline epoxy resins (al) may be used. Specific examples of the bisphenol-type epoxy resin include EPICLON 1050 and EPICLON. 2055, EPICLON 3050, EPICLON 4050, EPICLON 4055, EPICLON 7050, etc. (the above are manufactured by Dainippon Inka Chemical Industry Co., Ltd.). The main epoxy equivalent of the specific examples of the bisphenol epoxy resin listed above is 160. (: And 200 ° C viscosity, Mw / Mn, Tm, Tg, | ίο degree applicable to China National Standard (CNS) A4 specifications (210X297 mm 1 -------- • equipment--ί (Please (Please read the notes on the back before filling out this page) Order 531554 A7 B7 V. Description of Invention (8)

The overall arrangement of Tm-Tg 丨 is shown in Table 1. In addition, the epoxy equivalent value is measured according to JISK 7236-1995, and the viscosity values at 160 ° C and 200 ° C are measured using the precision

Measured by a viscometer (RV20 type), and the Mw / Mn value is a stationary phase separation column packed with TS gel, fixed to HLC-8020 manufactured by Toyo (Shares), and measured using tetrahydrofuran as a mobile phase solvent . Table 1 Non-crystalline epoxy resin trade name epoxy equivalent (g ^ eq) viscosity (poise) molecular weight and other melting points (° C) Gardner * 160 ° C 200 ° C Mw Mn Mw / Mn Tm Tg 1 Tm-Tg | EPICLON 1050 475 F 1.5 0.25 2400 1000 2.40 68 26 42 EPICLON2055 640 U 5.5 1.5 3200 1500 2.13 84 42 42 EPICLON 3050 800 TU 6.5 1.5 5000 1900 2.63 98 54 44 EPICLON 4050 950 ST 13.5 5 5000 2000 2.50 101 56 55 EPICLON 4055 925 RS 13 5 5200 2200 2.36 97 55 42 * The butylcarbitol solution with a solid content of 40% is printed by the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Distillation (please read the precautions on the back before filling this page). In the case where the crystalline epoxy resin (a2) is used, a composition having advantages such as low melt viscosity, high fluidity, and uniform coating properties can be obtained. Preferable specific examples of the crystalline epoxy resin (a2) include triglyceride isocyanate (produced chemical (stock), trade name TEPIC G); 4,4'-bis (2,3-glycidoxy) ) _3,3 ', 5,5 | -Tetrafluorenylbiphenyl (Oilification Snow Epoxy (share), EPICOTE-4000 outside the product); 2,6-bis (2,3-epoxypropoxy) -Naphthalene; bis (1,2-glycidyloxy-naphthyl) -methane; 2,2-bis [3,5-di> smell-4- (1,2-glycidoxy) -benzene Radical] -propanyl. Table 2 shows the total epoxy resin equivalent of the above-mentioned crystalline epoxy resin (a2), the epoxy equivalent of 150 ° C, the Tm, Tg, and I Tm-Tg I. 11 This paper size applies Chinese National Standard (CNS) A4 specification (210X 297 mm) 531554 Μ B7 V. Description of invention (9) Table 2 Epoxy equivalent viscosity of crystalline epoxy resin / 150 ° C melting point, etc. (° c ) (_ (Poise) Tm Tg 1 Tm-Tg 1 Triglyceride isocyanate 105 0.3 91 92 1 4, Bis (2,3-glycidoxy) 3,3'-5,5 · -Tetra Methylbiphenyl 195 0.1 99 102 2 2,6-Bis (2,3-glycidyloxyl 150 150 or less 55 57 2 Bis (1,2-glycidyloxyl-pyridinoline 220 0.1 or less 159 163 4 2,2-bisp, 5-dibromo 1 (1,2, glycidyloxy > phenyl] -propane 340 0.5 115 117 2 (Please read the precautions on the back before filling this page) Non The weight ratio of the crystalline epoxy resin (al) and the crystalline epoxy resin (a2) is based on the non-crystalline epoxy resin (al) / crystalline epoxy resin (a2) = 80/20 ~ 99/1 Furthermore, it is preferably 85/15 to 96/4. When the ratio of the use of the non-crystalline epoxy resin (al) / the crystalline epoxy resin (a2) is within the above range, the crystalline epoxy resin may be used. (A2), it can significantly improve the fluidity and the prevention of penetration. The alkylimidazole compound (B) to be used is used as a hardener. From the viewpoint of the appearance of the cured coating film and the prevention of perforation, it is preferably a compound represented by the following general formula (I): Ministry of Standards Bureau, Consumer Cooperatives, Printing R3

12 This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) 531554 A7 --------- ^ V. Description of the invention (1〇) --- (where R1 ~ R5 represent hydrogen atoms Or carbon number Bu 9 based). Especially from the viewpoints of flowability, prevention of perforation, and corrosion resistance, the compound of the general formula (I) is preferably phenylimidazole (R1 to R5 are hydrogen atoms). Specific examples of the compound represented by the general formula ⑴ include, for example, a phenyl flavor (manufactured by Hughes Co., Ltd. as a thin sheet, a yellowish white color, and a melting point of 99 to 101.). The compound represented by formula ⑴ can be used alone or in combination of two or more kinds. If necessary, it can be combined with polytarctic acid (such as adipic acid diacid :, sebacic acid diacid, dodecanedioic acid diacid, Isodium dicarboxylic acid dihydrazone, carbamic acid, etc.); imidazoles (such as imidazole, 2-methylimidazole, 2-ethylimidazole, 2-isopropylimidazole, heptylimidazole, 2-phenylimidazole, etc.) ), Etc. are generally used in combination with hardeners for epoxy powder coatings. At this time, the amount of other hardeners used is 1,000 to 5 parts per 100 parts of the compound represented by Formula ⑴, and it flows. From the standpoint of perforation and perforation, the number is preferably 500 to 5. It is printed by the Consumer Standards Cooperative of the Central Standards Bureau of the Ministry of Lithuania (please read the precautions on the back before filling this page) The epoxy resin used in the present invention ( The equivalent formulation ratio of A) with alkylimidazole compound (B) is epoxy resin. (A) / alkylimidazole compound (B) = i.〇 / (UO ~ ho / (K80, more preferably 1.0 / 0.20 ~ ΐ · 〇 / 〇 · 50. The above-mentioned blending ratio is 1 〇 / Below 〇10, the hardening speed becomes faster, the melt viscosity becomes lower, and the fluidity, the anti-perforation and anti-corrosion residual properties can be improved. Furthermore, if it is above 10/0 · 80, it can still be rapidly hardened. The molecular weight increases the corrosion resistance significantly. The powder coating material of the present invention can be added with an extender pigment or a coloring material such as dioxide, talc, calcium carbonate, barium carbonate, stone dioxide, mica, alumina, and carbon black as required. , Phthalocyanine green, phthalocyanine blue. This paper is suitable for financial use) M size one (210X297 mm) After the Ministry of Standards and Industry * Standard Bureau Shellfish Consumer Cooperative Press 531554 A7 B7 V. Description of the invention (12) Use in Example 6 Epoxy resin (al) (mixture of EPICLON 3050 and EPICLON 4050) has an epoxy equivalent of 869 g / eq, an active hydrogen equivalent of phenylimidazole is 146 g / eq, and adipic acid is 44 g / eq, 2- Methyl-2-imidazole is required to be 84g / eq. In addition, the hardener EPICLON B-605IM in Tables 3 and 4 is a Japanese agent Urea-based hardener manufactured by the Chemical Industry Co., Ltd. (Productivity of coatings) When powder coating is applied, an extruder heated to 110 ° C (PLUSTICODER PL2000 type manufactured by Grabender) is used to melt the intended compound. Knead (retention time is 40 seconds), and then determine whether the melt-kneaded product is homogeneous. ○: The melt-kneaded product obtained by the extruder has no visually visible substance and has a smooth surface. X: Obtained by the extruder The melt-kneaded material is visually visible, or the surface is not smooth. (Caking resistance) 20 g of the powder coating material was placed in a glass bottle (inner diameter: 4 cm), and a weight of 25 g / cm2 was applied. After storing at 35 ° C for one week, it was taken out of the glass bottle, and the shape was judged at this time. 〇: The state of the fine powder before the heavy storage was restored. X: It is completely impossible to restore the state of the fine powder before the weight storage. (Appearance of hardened coating film) A gray-black cast iron sheet with casting defects of 150mm X 70mm X 15.0mm was used as the base material. 15 This paper size is in accordance with Chinese National Standard (CNS) A4 (210X297 mm) (Please read the precautions on the back before filling this page) -Φ · 531554 A7 B7 V. Description of the invention (13) Visually observe the appearance of the sample 'A case where the surface is smooth is not good, and the surface is matte and has unevenness, and it is judged that it contains unevenness. (Prevention of perforation prevention) One piece of 150 mm X 70 mm X 15.0 mm was used for each Example or Comparative Example, and a gray-black cast iron sheet with casting defects was used as a base material, and a total of 4 sheets were used. A hole detector was used to apply a voltage of 2000 V to the sample, and the surface of the coating film was scanned to measure the average number of perforations (impact resistance) on each sample. A 150 mm X 70 mm X 2.0 mm steel plate was used. The test was performed in accordance with JISK 5400-1990 No. 8 · 3 · 2 (DuPont impact test). (Erickson test) A steel plate of 90mm X 90mm X 1.2mm was used. Evaluation was performed in accordance with the A method of JIS Z 2247. — (Brine Spray Test) Use a 150mm X 70mm X 2.0mm steel plate. Printed by the Consumer Standards Cooperative of the Central Bureau of Standards of Didi (please read the precautions on the back before filling this page) to form the gap between the film surface and the substrate, and then continuously spray with 3% NaCl aqueous solution at 35 ° C For 3,000 hours, observe the state of the coating film, and place a knife into the wound to observe the extent of creep peeling. (Water resistance) Use 150mm X 70mm X 2.0mm steel plate. After immersing the coating material in water for one year, the state of the coating film was measured. 16 This paper size applies Chinese National Standard (CNS) A4 specification (210X 297 mm) 531554 A7 B7 V. Description of invention (14) Table 3 Example number Epoxy resin (al) EPICLON3050 100 95 47.5 EPICLON4050 100 95 47.5 Crystallinity Resin (a2) triglyceride isocyanate 4,4f-bis (2,3-glycidoxy)> 3,3 ·, 5,5 * -tetramethylbiphenyl 2,6-bis (2,3- Glycidyloxy >naphthalene; bis (U-glycidoxy # ylphenylimina hardener * 1.8 (1 / 0.1) 5.8 (1/03) 7.3 (1 / 0.4) adipic acid di » 5.2 (1 / 0.2) 17.0 (1 / 0.7) 6.4 (1 / 0.4) 0.8 (1 / 0.1)

EPICLQNB-60SIM extender pigment

Ti02

Si02 (Please read the precautions on the back before filling this page) -Packing · Additives

Product appearance of MODAFLOW coating anti-caking hardening coating film (smoothness) 0.5 〇 0.5 0.5 0.5 0.5 〇 Δ 0.5 〇〇, 1T Good Good Good Good Good Good Ministry of Economic Affairs Central People's Republic of China Bureau of Staff Consumer Cooperation Printed perforations Preventive property (one / painting board 1) < Impact resistance (use Xcm for 1kg load) 1.5

The scale of Zhang and Zhang applies to Zhongguanjia Standard 17 531554 Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs

Sheet of paper A7 B7 Description of the invention (15 Comparative Example No. 1 2 3 4 5 Epoxy EPICLON3050 100 70 — 90 — Resin (al) EPICLON4050 — One 90 — 90 Groups of crystalline triglyceride isocyanate One to one 10 — Resin (a2) 4,4'-Bis (2,3-glycidoxy) > 3,3 ', 5,5'-Tetramethylsatoshi — 30 10 10 2,6-bis (2,3- Glycidyloxy > Steamed bis (1,2-glycidyloxy-Phenyl-Phenyl sulfonium sulfonium sulfonate sclerosing agent * 2-fluorenyl-2-imidazole η species one — 3 7 (1 / 0.3) Adipic acid sf f 5.5 Π / 1.0) 6.4 Π / 0.6) 3.0 (1 / 0.5) 2.7 (1 / 0.3) EPICLONB-605IM One 3.0 2.0 — Constitution pigment Ti02 10 10 10 10 10 Si02 30 30 30 30 30 Additive MODAFLOW 0.5 0.5 0.5 0.5 0.5 0.5 Productivity of coating 〇 〇〇〇〇Caking resistance 〇X 〇〇〇 Evaluation of the appearance (smoothness) of the hardened coating film Concave-convex perforation prevention (pieces / coated sheet 1) Most none Most majority Most knots Impact resistance (Xcm for 1 kg load) 40 40 40 50 20 Fruit Erickson test (mm) 4 2 6 5 5 Salt water spray test No abnormality in the coating film state No abnormality No significant abnormality Creep length 2mm 8mm 3mm 3mm 9mm Water resistance generated to produce water ^ Pack—produce peach produce peach produce peach use extruder The amounts of the desertified Shuangpan A-type epoxy resins (produced by Dow Chemical Co., Ltd., XD8G94⑽) in Table 5 were anhydrously desertified with benzenedipic acid and 20-ca-pyridine, and melt-mixed to extrude them, followed by pulverization. 5 The material obtained from i4 above the recorded ratio & R. Carbonic acid (Baiyan X Industry Co., Ltd. made white Yanhua CCR on the surface of the obituary, the average particle size L degree applies to the Chinese National Standard (CNS) A4 specification (210x7 ^^ guang ( (Please read the precautions on the back and fill in this page)

531554 A7 B7 V. Description of the invention (16) 80m / 〇, and long-chain aliphatic polyamide (ACROWAXC manufactured by Guli Chemical Co., Ltd., average particle size 50m // below) are dry blended to obtain a pass of 150 A mixture of meshes was then evaluated in the same manner as in Examples 1 to 6. The results are shown in Table 5. Table 5 Comparative Example Number 6 Group 7 Brominated Bisphenol A Epoxy Resin 100 100 Anhydrous Bromophthalic Acid 30 30 2-undecylimidazole 0.3 0.3 $ Organic Acid Surface Treatment Carbonate 5 9 Long Chain Fat Group Polyamide 3 9 Coating Productivity XX Property Agglomeration 〇〇 Appraisal of the appearance (smoothness) of the hardened coating film with unevenness and unevenness prevention of perforation (one piece / coated board) 1kg load) (cm) 20 20 Fruit Eriksson test (mm) 2 2 Salt water spray test Blisters generated in the coating film state Blisters creep length > 10mm > 10mm Water resistance 8 ~ 9 Printed by the Consumer Cooperative of the Central Bureau of Standards, Didi (Please read the precautions on the back before filling out this page) Use an extruder to apply the amount of bisphenol A epoxy resin (oilized snow and land) listed in Table 6. EPICOTE 1002), triglyceride isocyanate, and ethylene glycol bistrimellitate manufactured by Epoxy (stock) are melt-mixed and extruded, and then pulverized. The above-mentioned pulverized product, resin acid surface-treated calcium carbonate (manufactured by Shiraishi Industry Co., Ltd., Bai Yanhua TDD, average particle size 400m //) and long-chain aliphatic polyamide (manufactured by Guli Chemical Co., Ltd.) 19 This paper size applies the Chinese National Standard (CNS) Λ4 specification (210X 297 mm) 531554 A7 B7 V. Description of the invention (17) ACROWAXC, average particle size 50m // below) dry blending to get the 150 program passed The mixture was then evaluated in the same manner as in Examples 1 to 6. The results are shown in Table 6. Table 6 Comparative example number 8 9 Group of bisphenol A epoxy resin 100 100 triglyceride isocyanate 20 20 ethylene glycol bistrimellitic acid ester 70 70 $ resin acid surface treatment carbonic acid # 5 3 2 long Chain aliphatic polyamide 2 1 Productivity of coating XX Block resistance 〇〇 Evaluation of appearance (smoothness) of hardened coating film With unevenness and unevenness prevention of perforation (one piece / coated sheet 1) Most of the knots are impact resistant (1kg load) (cm) 20 20 Fruit Erickson test (mm) 2 2 Salt spray test Coating state Blisters generated Blisters creep length > 10mm > 10mm Effect] (Please read the precautions on the back before filling in this page. Ordering the use of the powder coating of the present invention by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs will not damage the tightness, blocking resistance, appearance of the coating film, and wealth. In addition, the hardening temperature rises, the melt viscosity decreases, the fluidity increases, there is no perforation, and a cast iron pipe with a uniform coating film can be obtained. The paper size of this paper applies the Chinese National Standard (CNS) Λ4 regulation (210X 297 mm)

Claims (1)

531554 No. 8710404 Application No. A8 B8 C8-Lee range chrome, underwood D8 Issue g-91.6.28 6 'Application for patent scope t 1 · A powder coating for cast iron pipes, 1 sentence · "· .. ·· — ι} Amorphous epoxy resin (al) Alone or non-crystalline epoxy resin Resin ⑷, epoxy resin (A) having a composition in combination with crystalline epoxy resin (a2); and) arylimidazoline compound (B) represented by the following general formula (I), [Chemical Formula 1] R 'R丨 N NH Ministry of Intellectual Property Bureau staff consumption (where R ~ R5 is a hydrogen atom or a carbon number of 丨 ~ 9), where the non-crystalline epoxy resin (al) is, and the melt black measured by the globe method is 80 ~ 12 (TC, viscosity at 160 ° is less than 100 poise, and the viscosity at 200 ° C is less than 20 poise. 2. As described in item 丨 of the scope of patent application Powder coating, wherein the polystyrene-equivalent weight average molecular weight (Mw) and number average molecular weight (Mn) ratio (Mw / Mn) of the non-crystalline epoxy resin (al) is 20 to 3.5. 3. If a patent is applied for The powder coating according to item 1 of the scope, wherein the non-crystalline epoxy resin (al) is a bisphenol type epoxy resin. 4. As described in item 3 of the scope of patent application Powder coating, wherein the J__ 21 Ben Λ Zhang scale applicable Chinese National Standard (CNS) A4 size ⑵◦ X Norway Kimiyoshi) ---------- 0M C, please read the notes on the back before filling in this page) • I nn —Order --------- I / 、、 Applicable patent scope double hope 51¼ oxygen resin The epoxy equivalent is please ~ called. 5 · Powder coating as described in item 2, 2, 3, or 4 of the scope of the patent application. The weight = non-crystalline epoxy resin (a 丨) / weight of crystalline epoxy resin (a2) = benchmark _ The ratio is non-crystalline epoxy resin (ai) / crystalline epoxy resin (a2) = 80/20 ~ 99/1. 6. The powder coating according to item 5 of the scope of patent application, wherein the non-sa The% oxygen resin (al) is a bisphenol epoxy resin. 7. The powder coating according to item 6 of the scope of patent application, wherein the epoxy equivalent of the phenol epoxy resin is 670 to 1500 g / kg. 8 The powder coating according to item 4 of the scope of the patent application, wherein the equivalent reference ratio of the% oxygen resin (A) and the arylimidazoline compound (B) is epoxy resin (A) / arylimidazole Command compound (B) = 1.0 / 0.10 ~ 1.0 / 0.80. Nnn ί · nn ϋ · ϋ nnn Order —--------- Γ Please read the precautions on the back before filling in this page) / Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs22