Reference

Coating of cellulosic base stocks

Coating of cellulosic base stocks. Robbart, Edward (USA ). PCT Int. Appl. WO 8502205 A1 23 May 1985,18 pp. DESIGNATED STATES: W: AU, BR, DK, FI, JP, KR, SU; RW: AT, BE, CH, DE, FR, GB, LU, NL, SE. (English). (World Intellectual Property Organization). CODEN: PIXXD2. CLASS: ICM: C23C011-00. APPLICATION: WO 84-US1879 16 Nov 1984. PRIORITY: US 83-552316 16 Nov 1983. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Section cross-reference(s): 43 Cellulosic webs before coating are treated with silane vapors which react with OH groups to form siloxanes, which improve holdout, wet strength, and release. Thus, supercalendered kraft paper was treated with MeSiHCl2 [75-54-7] at room temp. for 5 s. The sheet was coated with a com. silicone release formulation, requiring ~20% of the normal amt., and cured at 300 °F for 60 s. The sheet had free release characteristics and good coating adhesion.

Dioxasilepin and dioxasilocin stabilizers

Dioxasilepin and dioxasilocin stabilizers. Spivack, John D.; Pastor, Stephen D. (Ciba-Geigy A.-G. , Switz.). Eur. Pat. Appl. EP 114148 A2 25 Jul 1984, 25 pp. DESIGNATED STATES: R: BE, DE, FR, GB, IT, NL. (German). (European Patent Organization). CODEN: EPXXDW. CLASS: IC: C07F007-08; C07F007-04; C07F007-02; C09K015-32; C08K005-54. APPLICATION: EP 84-810007 6 Jan 1984. PRIORITY: US 83-457349 12 Jan 1983. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 29 Nine compds. I (R, R1 = H, C1-4 alkyl, Ph; RR1 = group II; Z = a bond, C1-7 alkylidene, S; R2 = C4-12 alkyl, C7-12 alkaryl, R3 = H, C1-12 alkyl, Ph) are prepd. for use as stabilizers for plastics such as polyolefins and PVC [9002-86-2]. Thus, Cl2SiHMe [75-54-7] in toluene was treated slowly at 5-10° with a soln. of 3,3',5,5'-tetra-tert-butyl-2,2'-dihydroxy-1,1'-biphenyl [6390-69-8] and Et3N in toluene to prep. 2,4,8,10-tetra-tert-butyl-6-methyldibenzo[d,f][1,3,2]dioxasilepin (III) [88946-07-0]. Isotactic polypropylene [25085-53-4] contg. 0.3% III was stable for 280 h in a test of light resistance, compared with 50-100 h for the unstabilized polymer.