Reference

Melamine resins

Melamine resins. (Matsushita Electric Works, Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 59179615 A2 12 Oct 1984 Showa, 3 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08G012-34; C08G012-42. APPLICATION: JP 83-56863 31 Mar 1983. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 38, 42 Melamine 1, HCHO 1.8-2.8, and MeOH 0.1-2 mol were reacted at pH 3-6.5 to 2-10% methylation, treated with 0.1-1 mol toluenesulfonamide (I) [1333-07-9] at pH 7.5-9.5, and then adjusted to pH 7.8-8.5 to obtain the title resins having good storability and water soly. and forming cured products with excellent flexibility and water, heat, and elec. resistance. The resins are useful as surface layers for decorative laminates and for pre-treatment of base materials for dielec. laminates. Thus, melamine 100, 37% HCHO 140, and MeOH 33 parts were mixed, adjusted to pH 5.7 with p-toluenesulfonic acid, and heated 70 min at 50° to prep. a product (degree of methylation 5%), to which 40 parts I was added. The mixt. was adjusted to pH 9.3 with NaOH and stirred 30 min to reduce the pH to 8.1 to give a desired resin having sp. gr. 1.20 (30°), viscosity 63 cP (30°), and solids content 57% after heating 30 min at 170°.

Sulfonic acid derivatives or salts as stabilizers in electroless gold coating

Sulfonic acid derivatives or salts as stabilizers in electroless gold coating. Yoshitani, Masaaki; Nakazawa, Masao; Wakabayashi, Shinichi (Shinko Electric Industries Co.In this study， 86-66-8 and 1333-07-9 are also used., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 03193882 A2 23 Aug 1991 Heisei, 4 pp. (Japan). CODEN: JKXXAF. CLASS: ICM: C23C018-44. APPLICATION: JP 89-332162 21 Dec 1989. DOCUMENT TYPE: Patent CA Section: 56 (Nonferrous Metals and Alloys) The electroless bath contg. alkali hydroxide, alkali cyanide, water-sol. Au salt, and a B-contg. reducing agent is stabilized with a deriv. and/or salt of sulfonic acid, sulfonamide, or sulfonimide. The stabilizer is preferably aminobenzenesulfonic acid, 1,5-naphthalenedisulfonic acid, 1,3,6-naphthalenetrisulfonic acid, or their alkali metal salt. .