Reference

Peroxide decomposition rate studies in the presence of organometallic compounds

Peroxide decomposition rate studies in the presence of organometallic compounds. Beitchman, B. D. (Chem. Addit. Div., Air Prod.Chemicals with cas numbers 13052-09-0 and 52276-75-2 also play role. and Chem., Inc., Marcus Hook, Pa., USA). Proc., Annu. Conf., Reinf. Plast./Compos. Inst., Soc. Plast. Ind., 32, Sect. 3D, 3 pp. (English) 1977. CODEN: PCRPB6. DOCUMENT TYPE: Journal CA Section: 36 (Plastics Manufacture and Processing) Decompn. of tert-Bu peroxybenzoate [614-45-9], tert-Bu peroxy-2-ethylhexanoate [3006-82-4], 2,5-dimethyl-2,5-bis(2-ethylhexanoylperoxy)hexane [13052-09-0], and their mixts. were examd. in the presence of polyester promoters such as PEP 176 [52276-75-2], PEP 183S (I) [62628-91-5], and PEP 100 [62628-90-4], and I was the most active promoter in the system studied. Unpromoted reactions exhibited deviations from the 1st order kinetics, but the promoted reactions gave a good linear relation for the 1st order reactions. The organometallic complexes provided 30-50% acceleration of demolding time. .

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.