Detail of "13467-82-8"

Reference

Modified polyurethane liquid polymer compositions

Modified polyurethane liquid polymer compositions. O'Connor, James M.; Lickei, Donald L.; Rosin, Michael L. (Olin Corp. , USA). U.S. US 4424333 A 3 Jan 1984, 5 pp. Cont.-in-part of U.S. Ser. No. 203,212. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C08G018-10; C08G018-67. NCL: 528075000. APPLICATION: US 81-306845 29 Sep 1981. PRIORITY: US 80-203212 3 Nov 1980; US 80-203213 3 Nov 1980. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 38, 42 A liq. polyurethane useful for moldings and coatings comprises an org. polyisocyanate, a polyol having av. equiv. wt. ~75-500 and av. functionality 33, an isocyanate-reactive group-contg. unsatd.Several substances with their cas registry numbers 868-77-9 and 24800-44-0 may be metioned in this study. monomer selected from hydroxyethyl acrylate (I), hydroxypropyl acrylate, hydroxyethyl methacrylate, hydroxyethylacrylamide, and hydroxypropylacrylamide, and a heat-activated free radical-generating catalyst. Thus, a mixt. of glycerol-propylene oxide-sucrose adduct 117.5, tripropylene glycol 19.2, and I 116 g was added dropwise to TDI 174, styrene 285, hydroquinone 0.071, and 2,6-di-tert-butyl-4-methylphenol 0.142 g and the mixt. was stirred for 2 h. A 50% stannous octoate soln. in dioctyl phthalate (2.84 g) was added. After stirring for 15 min, the mixt. was heated at 70° for 4.5 h to give a polyurethane oligomer, which was mixed with a catalyst comprising 0.5% tert-Bu peroctoate [13467-82-8] and 0.5% tert-Bu perbenzoate [614-45-9] and heated at 120° for 1 h to give a molded product having tensile strength 9770 psi, elongation at break 4.39%, and flexural strength 17,750 psi, compared with 6680 psi, 3.02%, and 16,600 psi, resp., for Derakane 470. .

Hardening elastomers by grafting on adsorbed monomers

Hardening elastomers by grafting on adsorbed monomers. Gardner, Irwin J. (Exxon Research and Engineering Co., USA). Fr. Demande FR 2326439 29 Apr 1977, 26 pp. (French). (France). CODEN: FRXXBL. CLASS: IC: C08J003-24. PRIORITY: US 75-619294 3 Oct 1975. DOCUMENT TYPE: Patent CA Section: 38 (Elastomers, Including Natural Rubber) Butyl rubber contg. a conjugated diene was swollen with styrene (I) and then grafted and crosslinked with vinyl monomers, adsorbed on an inert filler, in the presence of a peroxide free radical catalyst. Thus, 34.4 g of a conjugated diene-contg. Bu rubber swollen with 11.35 mL I was compounded with 10.16 mL methacrylic acid adsorbed on 1.166 g pyrogenic SiO2, of sp. surface area 200 ± 25 m2/g, in the presence of 0.580 mL tert-Bu peroctoate [13467-82-8] and 0.055 g bis(4-tert-butylcyclohexyl) peroxydicarbonate [15520-11-3]. After vulcanizing 40 min at 110°, the rubber obtained had tensile strength 18.05 MPa, elongation 267%, Shore A hardness 78, and was 98.4% insol. in PhMe in 48 h at 25°.