Reference

Recovery of dimethyl terephthalate from copolyester waste

Recovery of dimethyl terephthalate from copolyester waste. Cristescu, Ioana; Corduneanu, Ioan; Oprea, Maria; Sirbu, Andrei; Poplingher, Iosefina; Moisii, Eduard; Ciocan, Constantin (Combinatul de Fibre Sintetice, Rom.). Rom. RO 79554 B 30 Aug 1982, 3 pp. (Romanian). (Romania). CODEN: RUXXA3. CLASS: IC: C08G053-22; C07C063-26. APPLICATION: RO 80-101520 27 Jun 1980. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 38, 60 Di-Me terephthalate (I) [120-61-6] is recovered from polyester waste contg. ~15% di-Me isophthalate (II) by methanolysis at waste-MeOH mol ratio 1:15-20, 190-205°/ 31-34 atm in the presence of Zn(OAc)2 [557-34-6] or Sb2O3 catalyst, cooling to 65°/1 atm and to 35-38°/ 200 mm, filtering at 4 atm, washing with MeOH at 38-45° and room temp. after the 1st and 2nd filtration, treating the product with MeOH (3:2) at 30-50°, removing the MeOH phase, and distg. at 180-210°/40-50 mm in the presence of Na2CO3 and P compds. Thus, 1200 kg waste copolyester contg. 15% II based on I, 4200 L MeOH, and 5 kg Zn(OAc)2 were heated to 190-205° over 120-150 min and 90 min at 120-150°/31-34 atm. Cooling, multiple filtration and washing as above, and distn. at 185°/44 mm in the presence of 0.4% Na2CO3 and 0.3% (Ph0)3P [101-02-0] gave 80% I with purity 99. 7664-38-2 and 1309-64-4 are also in the experiment.8-99.9%, m.p. 140.58-140.60°, acid no. 0.06-0.1 mg KOH/g, and Hazen color 10 UH. .

Fire-resistant elastomeric compositions and products comprising these compositions

Fire-resistant elastomeric compositions and products comprising these compositions. (Eaton Corp., USA). Belg. BE 897157 A1 17 Oct 1983, 24 pp. (French). (Belgium). CODEN: BEXXAL.Some commonly used reagents like 1309-64-4 and 9003-07-0 are used in this experiment. CLASS: ICS: H01. ICI: C08. APPLICATION: BE 21-77 28 Jun 1983. DOCUMENT TYPE: Patent CA Section: 39 (Synthetic Elastomers and Natural Rubber) The title compns., useful in cable jacketing and insulation, contain 25-75 parts thermoplastic cryst. polyolefin, 75-25 parts vulcanized olefin rubber, 20-40 phr halogenated compd. (50-80% Cl and/or Br), 5-20 phr Sb2O3, and 0.01-8 phr Pb compd. stabilizer. Thus, a mixt. of Santoprene 101-87 (thermoplastic rubber) 100, polyethylene [9002-88-4] (GRSN 7441) 10, (C6Br5)2O [1163-19-5] 25, Sb2O3 5, tetrabasic Pb fumarate [13698-55-0] 1, antioxidant (Irganox 1010) 0.5, and calcined clay (Burgess KE) 20 parts had d. 1.255, Shore D hardness 40, tensile strength 10.101 MPa, 100% modulus 7.343 MPa, elongation 320%, and limiting O index 26.9. .