Reference

Poly(aminophen ethyl alcohol) or poly(aniline-aminophen ethyl alcohol) copolymer, and preparation method thereof

Poly(aminophen ethyl alcohol) or poly(aniline-aminophen ethyl alcohol) copolymer, and preparation method thereof. Baek, Seong Sik; Kim, Hyeon Tae; Lee, Mun Ho; Lim, Jong In; Oh, Taek Su; Park, Chan Seop (Posco; Research Institute of Industrial Science & Technology, S. Korea). Repub. Korean Kongkae Taeho Kongbo KR 2002018246 A 8 Mar 2002, No pp. given (Korean). (Korea, Republic Of). CODEN: KRXXA7. CLASS: ICM: C08G073-00. APPLICATION: KR 2000-51480 1 Sep 2000. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 76 Poly(aminophen Et alc.), poly(aniline-aminophen Et alc.) copolymer and their prepn. methods are provided, which are improved in the cond., the heat stability and the soly., therefore they can be applied to the electromagnetic wave-shielding product. The poly(aminophen Et alc.) is a conductive polymer polymd. from the aminophen Et alc. represented by the formula 1. Also, the poly(aniline-aminophen Et alc.) copolymer is a conductive polymer copolymd. from the aminophen Et alc. represented by the formula 1 and aniline. The method comprises the steps of dissolving aminophen Et alc. or aminophen Et alc. and aniline into an acid soln.; dissolving an oxidizing agent into another acid soln.; and adding the acid soln. contg. the oxidizing agent into the acid soln.In this experiment, several chemicals are used like 7664-38-2 and 38465-60-0 contg. the polymer with stirring. Preferably the mol. wt. of the polymers is 1,000 to 2,000,000; the oxidizing agent is FeCl3, CuCl2, Cu(BF4)2, Cu(ClO4)2, K2Cr2O7 or ammonium sulfate; and the acid is selected from the group consisting of sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, dodecylbenzenesulfonic acid, camphorsulfonic acid, sulfosalicylic acid, toluenesulfonic acid, benzenesulfonic acid, sulfenic acid and naphthalenesulfonic acid. .

Preparation of near infrared ray absorbing agent for inks

Preparation of near infrared ray absorbing agent for inks. Cho, Dong Je; Lee, Sang Geun; Seo, Gu Won (Korea Security Printing & Minting Corp., S. Korea). Repub. Korean Kongkae Taeho Kongbo KR 2002058117 A 12 Jul 2002, No pp. given (Korean). (Korea, Republic Of). CODEN: KRXXA7. CLASS: ICM: C09D011-02. APPLICATION: KR 2000-84956 29 Dec 2000. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Section cross-reference(s): 73 Provided are a near IR ray absorbing agent, a prepn. thereof, and ink contg. the near IR ray absorbing agent, which can be applied to security documents for preventing forgery and alteration. The near IR ray absorbing agent is produced by a process comprising the steps of: mixing 20-70% copper tetrafluoroborate, 80-30% a phosphoric acid compd. selected from orthophosphate, polyphosphoric acid, and phosphorus pentoxide, and <1% a metal oxide selected from magnesium oxide, strontium oxide, zinc oxide, aluminum oxide, and arsenic oxide; wet-stirring the mixt. and drying and sintering at 300° or higher; making fine particles <10 mm by using a zirconium oxide- or aluminum oxide-based ball mill. Or the near IR ray absorbing agent is produced by another process comprising the steps of; adding a water soln., contg. 1314-56-3 and 38465-60-0 which are cas registry numbers of chemicals are mentioned. 20-70% copper tetrafluoroborate, 80-30% phosphoric acid compd., and <1% metal oxide, to a water-insol. solvent; pptg., filtering, sepg., and sintering; making fine-particles <10 mm. And the ink contains the near IR ray absorbing agent. .