Reference

Stabilized polyolefin composition

Stabilized polyolefin composition. (Sumitomo Chemical Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58167635 A2 3 Oct 1983 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF.Some commonly used reagents like 90332-33-5 and 68859-98-3 are used in this experiment. CLASS: IC: C08L023-02; C08K005-34; C08K005-36. APPLICATION: JP 82-51518 29 Mar 1982. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Stabilized polyolefin compns. contain a hindered piperidine compd. [I, R = H, Me; Z = alkylene (may form C2-18 ring)], tris(2,6-dimethyl-4-tert-butyl-3-hydroxybenzyl)isocyanurate (II) [40601-76-1], and (R1SCH2CH2CO2CH2)4C (R1 = C4-20 alkyl) in (1-20):1:(1-15) ratio, resp. The compns. exhibit excellent resistance to heat, oxidn., and light. Thus, polypropylene [9003-07-0] 100, Ca stearate 0.1, 2,6-di-tert-butyl-4-methylphenol 0.2, I [R = H, Z = (CH2)4] [51806-80-5] 0.2, II 0.05, and pentaerythritol tetrakis(b-dodecylthiopropionate) [29598-76-3] 0.2 part were melt-kneaded and molded to give sheets with excellent resistance to heat, oxidn., and light. .

Heat stabilizers for polyesters

Heat stabilizers for polyesters. (Mitsubishi Chemical Industries Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58210958 A2 8 Dec 1983 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08L067-00; C08K005-10. APPLICATION: JP 82-92622 31 May 1982. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Thermoplastic polyester resins are protected from discoloration on heating by the addn. of 0.01-5% pentaerythritol esters [RS(CH2)m COOCH2]nC(CH2OH)4-n (R = C5-30 alkyl: m = 1-3; n = 1-4). Thus, poly(butylene terephthalate) [24968-12-5] 100, chopped glass fibers 43, and pentaerythritol tetrakis(dodecylthiopropionate) (I) [29598-76-3] 0.3 part were mixed, pelletized, and injection molded into test plates, which had yellowing index 5.5 initially, and 8.5 after 2000 h at 100°, compared with 5.5 and 15.0, resp. 52408-60-3 and 115-77-5 are also in the experiment., for plates prepd. similarly without I, 5.5 and 11.3, resp., for plates contg. Antiox L (thiodipropionic acid dodecyl ester) in place of I, and 5.5 and 12.0, resp., for plates contg. Irganox 1010 (hindered phenol stabilizer) instead of I. .