Document Ev090RGO6a1mLOMq7a0ZEemEb

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' ............ r^= ii V DIVISIONS B1-B2 T- the free alkali in the silicate to alkali metal car then being unwound at temperatures as low as bonate and form a silica hydrogel containing -20 C. without delamination or off-setting of dissolved carbonate, the resulting mass is com the adhesive, and wrapped around splices and mingled with a solution of an aluminium salt wires, and having sufficient elasticity, retractil- _ of a strong mineral acid, in an amount sufficient ity and adhesion at such low temperatures to to provide up to 40% active alumina in the remain tightly in place while providing effective synthetic component of the finished catalyst and electrical insulation of the splices and wires to react substantially completely with the resi over the range of -20--87 C., comprises (1) a dual carbonate, there being added if necessary film backing consisting essentially of a stable a basic precipitant to the slurry to complete blend of (a) 100 parts by weight of a polymer precipitation of the alumina, the product being of from 90 to 100 parts by weight of vinyl filtered, purified and dried, with the proviso that chloride, from 0 to 10 parts by weight of vinyl / clay may be added to the reaction materials at acetate and (b) 45 to 75 parts of plasticizer, any stage during the process in a proportion the primary constituent of which is acylated constituting at most 50% by weight of the polyester of glycol and dibasic carboxylic acid, final product. Preferably the alkali metal salt at least 90 mol per cent of the glycol being at is sodium silicate, the aluminium salt is alum least one of 1,2-propylene glycol, 1,4-butanediol and the clay is kaolin. Comparative examples and 1,6-hexanediol, but not more than 65 mol are given. per cent of the glycol being 1,2-propylene glycol, and at least 90 mol per cent of the dibasic acid being at least one of the group of saturated aliphatic dibasic acids having alkylene 948,014. Catalytic compositions. ASAHI chains of 3 to 8 carbon atoms, the said poly KASEI KOGYO KABUSH1KI KAISHA. June 20, 1961 [June 21, 1960], No. 22309/61. ester being terminated by acyl radicals contain ing 2 to 18 carbon atoms and on the average V Heading BJE. [Also in Division C2] at least 8 carbon atoms and having an average - A catalyst for preparing acrylonitrile consists molecular weight of 2250--7000, and an acid . t! ;. of tellurium oxide and either a salt of phospho- number of not more than 3 ; and (2) a normally molybdic acid or molybdenum oxide, supported tacky and pressure-sensitive adhesive coating t. on alumina previously activated by heating at united and firmly bonded to one face of the 300--1000 C. The activated alumina is mixed film backing, the adhesive coating comprising with the other materials, moulded, and heated a homogeneous blend of (a) 40 to 60 parts e.g. at above 300 C. The materials may be in natural rubber, (b) correspondingly 60 to 40 such proportions that the molar ratii are parts butadiene-styrene synthetic rubber, (c) 80 P = 0 to 3, Te = 3 to 15, Mo = 5 to 20 and to 115 parts pure hydrocarbon thermoplastic Ala03= 20 to 50. In an example a catalyst is terpene resin having low acid number and prepared from alumina previously activated by having a melting point of at least 60 C., and - /- heating at 300--1000 C., tellurium oxide and (d) 3 to 16 parts of a compatible, oil soluble, ammonium phosphomolybdate. Comparative heat reactive, phenol-aldehyde resin. At least / examples describe the use of SiCh as a support. two-thirds of the plasticizer may be the said acylated polyester, the remainder being a poly / ester of essentially equimolar proportions of 1,2-propylene glycol and dibasic carboxylic 948,041. Isomerization catalysts. E. I. DU PONT DE NEMOURS & CO. April 3, 1962 [April 10, 1961], No. 12688/62. Heading B1E. [Also in Division C5] Rhodium trichloride, preferably dissolved in ethanol, which has been used as a catalyst in the codimerization of ethylene or propylene with 1,3-butadiene, is reactivated for re-use by the addition to the separated catalyst phase of hydrochloric acid. Preferably 1--40 mols of hydrochloric acid and optionally 500--25,000 grams of ethanol are added for each mol of rhodium trichloride in the separated catalyst phase. acid, at least 90 mol per cent of which is at least one of the group of saturated aliphatic dibasic acids having alkylene chains of 3 to 8 carbon atoms and having an average molecular weight which in excess of may contain 7000. A primer coatinga butadiene-acrylonitrile ./ ' vr' y copolymer, a glycerol ester of a gasoline in soluble resinous extract of pine wood, and a. para-tertiary-butyl-phenol-formaldehyde resin,~ may also be present. The adhesive may contain tackifier resins, plasticizers, e.g. di-2-ethylhexyl* phthalate, dibasic lead phthalate, reinforcing fillers, e.g. carbon black, calcium carbonate, clay and silica, stabilizers, e.g. epoxidized soy bean oil, di-tertiary-amyl-hydroquinone. All / /. V parts and percentages are by'weight Specifics^ ^ tion 635,127 is referred to. y 948,051. Pressure sensitive adhesive insulating tape. MINNESOTA MINING & MANUFAC TURING CO. Feb. 12, 1960 [Feb. 13, 1959 ; Feb. 19, 1959], No. 5070/60. Heading B2E. A pressure-sensitive, adhesive tape capable of being wound upon itself in roll form and of STLCOPCB4092340