Reference

Polyester resin powder coating compositions

Polyester resin powder coating compositions. Yoshihara, Ichiro; Kodama, Shunichi; Watanabe, Tadashi; Nakajima, Mikio; Chikami, Sukeichi; Ohno, Hiroshige (Kansai Paint Co., Ltd., Japan). Japan. Kokai JP 51125107 1 Nov 1976 Showa, 14 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C09D003-66. APPLICATION: JP 74-145172 18 Dec 1974. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Thermosetting powder coatings with good storage stability were prepd. by mixing a hydroxy group-contg. polyester resin with a benzoic acid deriv.-modified methoxymethylmelamine resin. Thus, a molten mixt. of di-Me terephthalate 194.0, di-Me isophthalate 174.6, neopentyl glycol 146.0, 1,3-butylene glycol 126.0, glycerol 27.6, and Pb oleate 1.0 part was heated at 240.degree. (the resulting MeOH was removed), mixed with 116.2 parts isophthalic acid and 43.8 parts adipic acid, heated to 240.degree., mixed with 30 parts xylene (the resulting water was removed), and evapd. under reduced pressure to give a polyester (I) [52635-14-0] resin (excess OH group 12.1%, acid value 7.1). A mixt. of hexakis(methoxymethyl)melamine [3089-11-0] 390, cyclohexanol [108-93-0] 170, and 60% HNO3 1.0 part was heated 3 h at 50.degree./50-60 mm (the resulting MeOH was removed >, and the reaction mixt. was neutralized with 30% NaOH MeOH soln., heated at 140-150.degree./5 mm (the unreacted cyclohexanol) and filtered (the neutralized salt was removed) to give a transparent viscous soln. (contg. no free methylol group) of cyclohexanol-modified methoxymethylmelamine (II). A mixt. of 458 parts II and 214 parts p-tert-butylbenzoic acid [98-73-7] was heated 70 h at 160.degree./50-60 mm (the resulting MeOH was removed) to give a reaction product (III), which was cooled and ground to give a brown powder. The I resin 90, the III powder 10, and a leveling agent 1.5 parts were melt mixed and ground to give a blocking-resistanat resin powder coating compn., which was coated on a glass plate and baked 30 min at 200.degree. to give a solvent-resistant coating film.

Polyester resin powder coating compositions

Polyester resin powder coating compositions. Yoshihara, Ichiro; Kodama, Shunichi; Watanabe, Tadashi; Nakajima, Mikio; Chikami, Sukeichi (Kansai Paint Co., Ltd., Japan). Japan. Kokai JP 51125106 1 Nov 1976 Showa, 12 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C09D003-66. APPLICATION: JP 74-145170 18 Dec 1974. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Thermosetting powder coatings with good storage stability were prepd. from benzoic acid deriv.-modified methoxymethylmelamine and OH-contg. polyester resins. Thus, a molten mixt. of di-Me terephthalate 194.0, di-Me isphthalate 174.6, neopentyl glycol 146.0, 1,3-butylene glycol 126.0, glycerol 27.6, and Pb oleate 1.0 part was heated at 240.degree. (the resulting MeOH was removed), mixed with 116.2 parts isophthalic acid and 43.8 parts adipic acid, heated to 240.degree., mixed with 30 parts xylene (the resulting water was removed), and evapd. under reduced pressure to give a polyester (I) [52635-14-0] resin (excess OH group 12.1%, acid value 7.1). A mixt. of 390 parts hexakis(methoxymethyl)melamine [3089-11-0] and 214 parts p-tert-butylbenzoic acid [98-73-7] was heated 65 h at 160.degree./50-60 mm, and the reaction mixt. was cooled and ground to give a melamine resin (II) contg. no free methylol group. The I 90, the II 10, and a leveling agent 1.5 part were melt mixed ad ground to give a blocking-resistant transparent resin powder coating compn., which was coated on a glass plate and baked 30 min at 200.degree. to give a solvent-resistant coating film.