Detail of "26741-53-7"

CAS Number:
26741-53-7
Name:
Antioxidant 24
Molecular Structure:
Formula:
C₃₃H₅₀O₆P₂
Molecular Weight:
604.77
Deleted CAS:
87498-44-0|940968-66-1|106234-83-7
Synonyms:
Phosphorousacid, cyclic neopentanetetrayl bis(2,4-di-tert-butylphenyl) ester (8CI);2,4,8,10-Tetraoxa-3,9-diphosphaspiro[5.5]undecane,3,9-bis(2,4-di-tert-butylphenoxy)- (8CI);Phenol, 2,4-di-tert-butyl-,dihydrogen phosphite cyclic neopentanetetrayl ester (8CI);ADK Stab PEP 24;ADKStab PEP 24G;2,4,8,10-Tetraoxa-3,9-diphosphaspiro[5.5]undecane,3,9-bis[2,4-bis(1,1-dimethylethyl)phenoxy]-;Antioxidant 626;Cyclicneopentanetetrayl bis(2,4-di-tert-butylphenyl phosphite);Di(2,4-di-tert-butylphenyl)pentaerythritol diphosphite;Doverphos S 9432;Irgafos 126;Irgafos 126FF;Mark PEP 24;Mark PEP 24G;Phos 5;Songnox6260;Ultranox 2879A;Ultranox 624;Ultranox 626;Weston 626;Weston MDW 626;
EINECS:
247-952-5
Melting Point:
160-178 °C
Boiling Point:
555.8 °C at 760 mmHg
Flash Point:
363.9 °C

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Stabilized polycarbonate composition: Stabilized polycarbonate composition. Axelrod, Robert Jay (General Electric Co., USA). Ger. Offen. DE 2726662 29 Dec 1977, 16 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C08L069-00. PRIORITY: US 76-698807 23 Jun 1976. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) Bisphenol A-COCl2 copolymer (I) [25971-63-5] was stabilized against thermal oxidn. and hydrolysis by adding the cyclic diphosphites (II, R = alkyl) and, optionally, silanes, alkoxysilanes, epoxyethane derivs (III, R1-4 = C1-24 alkyl, C6-24 aryl, CH2OR5, CH2O2CR5, CH2O2CYX, CO2CH2X, and CH2OYOCH2X, R5 = C1-24 alkyl or C6-24 aryl, Y = C1-24 alkylene, X = an oxirane ring) or the epoxycyclohexanes (IV, R6-13 = C1-24 alkyl, CO2R14, O2CR14, CO2YX, and O2CYCO2X, R14 = C1-24 alkyl). Thus, I contg. 0.07% 2,3-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate [46913-95-5] and 0.03% II (R = 4-Me3C) (V) [26741-53-7] exhibited less yellowing and better transparency after heat-aging in an autoclave than a similar sample contg. decyl Ph phosphite instead of V.

Mixed aromatic-aliphatic phosphites: Mixed aromatic-aliphatic phosphites. York, James Farnsworth (Borg-Warner Corp., USA). Ger. Offen. DE 2709528 15 Sep 1977, 15 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C07F009-02. PRIORITY: US 76-663651 4 Mar 1976. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) Section cross-reference(s): 28 Di-Ph pentaerythritol diphosphite, i.e., a mixt. of I (R = Ph) [144-35-4] and II (R = Ph) [42022-83-3], was transesterified to prep. a mixt. of I (R = 2,4-di-tert-butylphenyl) (III) [26741-53-7] and II (R = 2,4-di-tert-butylphenyl) (IV) [64918-96-3] and a mixt. of I (R = 2,6-di-tert-butylphenyl) [64918-97-4] and II (R = 2,6-di-tert-butylphenyl) [64918-98-5] which were useful as stabilizers for plastics such as polypropylene (V) [9003-07-0]. Thus, I (R = Ph)-II (R = Ph) mixt. 267, 2,4-di-tert-butylphenol [96-76-4] 371, and MeONa 8.5 g were heated to 190°/5 mm with distn. of phenol and freed of volatiles at 210°/5 mm to prep. a III-IV mixt. which was added (0.07%) to V contg. 0.05% Ca stearate and 0.10% Irganox 1010. The mixt. had melt index (ASTM D1238 L) 6.0 after 4 extrusions at 273.1°, compared with 16.4 without the III-IV mixt.