Detail of "2167-23-9"

Reference

Styrene polymer injection-molding compositions

Styrene polymer injection-molding compositions. (Denki Kagaku Kogyo K. K., Japan). Jpn. Kokai Tokkyo Koho JP 58080338 A2 14 May 1983 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08L025-04; C08K005-20. ICA: C08F004-38; C08F012-08. APPLICATION: JP 81-179086 10 Nov 1981. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Styrene polymers contg. little residual monomer, which are easily injection molded into articles having excellent mech. properties, are manufd. by polymg. styrene (I) and optionally other vinyl monomers with a peroxide initiator mixt. contg. di-tert-butyl peroxyisophthalate (II) [33943-20-3], di-tert-butyl peroxy-2,4,4-trimethyladipate [21850-40-8], and/or tert-butyl peroxy-2,2,4-trimethyladipate [88056-40-0]; and tert-butyl peroxyacetate [107-71-1], tert-butyl peroxybenzoate [614-45-9], ethyl 3,3-bis(tert-butylperoxy)butyrate (III) [55794-20-2], methyl 3,3-bis(tert-butylperoxy)butyrate [81229-31-4], 2,2-bis(tert-butylperoxy)butane [2167-23-9], and/or Bu 4,4-bis(tert-butylperoxy)valerate [995-33-5]; and then blending the resulting polymer with erucamide (IV) [112-84-5] contg. ￡20% C￡20 aliph. amide impurities. Thus, 25 kg I, 20 g II, and 8 g III were mixed and heated 10 h at 110-140° to obtain polystyrene [9003-53-6] 20 kg of which was mixed with 30 g IV and pelletized to form an injection molding compn. contg. 510 ppm residual I and having melt flow index 1.5 g/10 min, compared to 1000 ppm and 2.0 g/10 min, resp., for a compn. prepd. similarly using 57.5 g Bz2O2 in place of II.

Application of difunctional organic peroxides in the polymerization of ethylene under high pressures

Application of difunctional organic peroxides in the polymerization of ethylene under high pressures. Luft, Gerhard; Seidl, Hans (Inst. Chem. Technol., Tech. Hochsch. Darmstadt, Darmstadt 6100, Fed. Rep. Ger.). Angew. Makromol. Chem., 129, 61-70 (English) 1985. CODEN: ANMCBO. ISSN: 0003-3146. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) The suitability of difunctional org. peroxides for the synthesis of low-d. polyethylene [9002-88-4] was examd. with a view to improve the results. Polymn. tests were carried out in a stirred autoclave pilot plant using 3 different difunctional compds. [RC(:O)O2(CMe2CH2CH2CMe2)O2C(:O)R [13102-32-4], RO2C(Me)EtO2R [2167-23-9], and RO2(CMe2CH2CH2CMe2)O2R [78-63-7] (R = tert-Bu)] with different levels of thermal stability at 1700 bar and 180-290°. The conversion and the specific peroxide consumption were measured and the av. molar masses of the polymers obtained were detd. The soly. of the peroxides in isododecane was also examd.