Reference

Polymeric additives for water

Polymeric additives for water.Some chemicals with cas registry numbers like 40623-75-4 are also used. Persinski, Leonard J.; Walker, Jerry L.; Boffardi, Bennett P. (Calgon Corp., USA). Eur. Pat. Appl. EP 122013 A1 17 Oct 1984, 29 pp. DESIGNATED STATES: R: AT, BE, CH, DE, FR, GB, IT, LI, LU, NL, SE. (English). (European Patent Organization). CODEN: EPXXDW. CLASS: IC: C02F005-08; C23F011-00. APPLICATION: EP 84-301450 5 Mar 1984. PRIORITY: US 83-472808 7 Mar 1983; US 84-578331 14 Feb 1984. 40623-75-4 which is the cas registry number is also used here. DOCUMENT TYPE: Patent CA Section: 61 (Water) Synergistic mixts. for inhibition of scaling and corrosion in water circulating systems consist of a copolymer of an unsatd. carboxylic acid and an unsatd. sulfonic acid (or their salts) and a water sol. polycarboxylate, phosphonate, PO43-, polyphosphonate, metal salt, or sulfonate. The mol. wt. of the copolymer is <25,000 and the wt. ratio of carboxylic acid to the sulfonic acid is 1-20 to 20-1. Thus, in a scale inhibition test, water contg. 200 mg/L Ca and 600 mg/L HCO3- was mixed with 0.5 g/L acrylic acid-2-acrylamido-2-methylpropyl sulfonic acid copolymer [40623-75-4] and 2 mg/L PO43-. The mixt. was stored at 65° for 24 h. The inhibition of CaCO3 formation was 27% higher than that expected from the inhibiting action of the individual components. ..

Water soluble polymers and dispersions containing them

Water soluble polymers and dispersions containing them. Farrar, David; Hawe, Malcolm (Allied Colloids Ltd., UK). Eur. Pat. Appl. EP 129329 A2 27 Dec 1984, 24 pp. DESIGNATED STATES: R: AT, BE, CH, DE, FR, GB, IT, LI, NL, SE. (English). (European Patent Organization). CODEN: EPXXDW. CLASS: ICM: C09D017-00. ICS: C09D007-02; C09D005-02; C08F020-04. APPLICATION: EP 84-303333 16 May 1984. PRIORITY: GB 83-13976 20 May 1983; GB 83-21731 12 Aug 1983. DOCUMENT TYPE: Patent CA Section: 43 (Cellulose, Lignin, Paper, and Other Wood Products) Section cross-reference(s): 42, 46 A pigment is dispersed in an aq. dispersant comprising poly(acrylic acid) [9003-01-4], acrylic acid-2-acrylamido-2-methylpropanesulfonic acid copolymer [40623-75-4], or their salts having polydispersity 1.05-1.4 and wt.-av. mol. wt. <4,000. The pigment is preferably a china clay, and the dispersion is used for paper coating and paint manuf. Thus, poly(acrylic acid) Na salt (I) [9003-04-7] having wt.-av. mol. wt. 2144 and polydispersity 1.13 was a more effective dispersant for china clay than I having wt.-av. mol. wt. 3202-5543 or 1065 and polydispersity 1.15-1.28.