摘要:
A process for oligomerizing alpha-olefins comprising contacting in a reactor zone under reaction conditions: (a) alpha-olefins having at least three carbon atoms; (b) an alkyl aluminum bromine or iodine compound having the formula R.sub.3 Al.sub.2 X.sub.3 or R.sub.n AlX.sub.3-n, wherein n is 1 or 2; R is an hydrocarbyl group and X is a reactive halogen selected from bromine and iodine; and (c) a cocatalyst which is (i) bromine, (ii) iodine, (iii) hydrocarbyl bromide having at least one halogen group reactive with said aluminum compound or (iv) hydrocarbyl iodide having at least one halogen group reactive with said aluminum compound.
摘要:
Improvements in scorch time of natural and synthetic rubber compositions in urethane crosslinking systems employing alkyl derivatives of dithiophosphoric acid as the scorch delay cure catalyst having the formula: ##STR1## wherein R.sub.1 and R.sub.2 are alkyl having at least 12 carbon atoms, or connected together and forman alkylene group having at least 2 carbon atoms, and R.sub.3 is hydrogen or phenethyl.
摘要:
Non-dripping, self-extinguishing polyurethane elastomers comprising, a hexaalkoxymethylmelamine; an organic halogen-containing a compound and a P-substituted phosphocyclopentane 1-oxide incorporated into a polyurethane elastomer.
摘要:
This invention is directed to oxidation resistant hydrocarbon oils and the making thereof. The oils are protected against oxidation by a synergistic antioxidant system comprising a mixture of a phenylated naphthylamine, a sulfur containing compound, and an oligodynamic amount of a specific metal or metal compound.
摘要:
There are disclosed novel, dodecahalo-9,10-oxadecahydro-1,4:5,8-dimethanoanthracenes which are useful as flame retardant additives for acrylonitrilebutadiene-styrene (ABS) gum plastics and other polymeric materials, and a method for preparing these novel anthracenes.
摘要:
Compounds of the formula: ##STR1## wherein n is 1, 2, 3, or 4; X.sup.1 and X.sup.2 are each, independently, chlorine or bromine; A is O or S; R.sup.1 is hydrogen or C.sub.1 -C.sub.16 alkyl; R.sup.2 is C.sub.1 -C.sub.16 alkyl, C.sub.6 -C.sub.16 aryl, C.sub.1 -C.sub.4 alkylidene, or CH.sub.2 OR.sup.5 ; R.sup.3 is hydrogen, chlorine, bromine, or OR.sup.6 ; R.sup.4 is C.sub.1 -C.sub.16 alkyl, C.sub.7 -C.sub.16 aralkyl, C.sub.2 -C.sub.16 alkenyl, or C.sub.6 -C.sub.18 aryl; R.sup.5 is hydrogen, C.sub.1 -C.sub.16 alkyl, C.sub.7 -C.sub.16 aralkyl, C.sub.2 -C.sub.16 alkenyl, or C.sub.6 -C.sub.18 aryl; and R.sup.6 is hydrogen or C.sub.1 -C.sub.16 alkyl. These compounds by themselves and in combination with certain halo-but-2-enoic acids and esters are useful as catalyst promoters in ethylene polymerization processes.
摘要:
Tert-alkylmethoxy-substituted vanadium compounds, several of which are novel, are useful as catalysts for the polymerization of ethylene or the copolymerization of ethylene with alphaolefins and (optionally) nonconjugated polyenes. Also disclosed is a novel catalyst composition comprising such vanadium compounds.
摘要:
Amorphous ethylene/alphaolefin copolymer (optionally additionally containing nonconjugated polyene) is purified by contacting a reaction mass comprising such polymer and live, soluble polymerization catalyst composition with an effective amount of a liquid wash solution comprising at least one member selected from the group consisting of ethane, propane, butane, isobutane, neopentane, propylene, 1-butene 2-butene and isobutene.
摘要:
A fire retardant system comprising a compound having within its structure the 1,2,3,4,9,9-hexahalo-1,4-dihydro-1,4-methanonaphthalene-5,8-dione or 1,2,3,4,9,9-hexahalo-1,4-dihydro-1,4-methanophthalene-5,8-dioxy nucleus or a compound which is capable of being converted to the 1,2,3,4,9,9-hexahalo-1,4-dihydro-1,4-methanonaphthalene-5,8-dione nucleus and requires no metal oxide addition to exert its function.
摘要:
A dripless, fire-retarded, polyurethane elastomer comprising a blend of the elastomer with a hexaalkoxymethylmelamine, a trihydrocarbylcarbonylmelamine and compounds selected from the group comprising (1) aromatic bismaleimide or (2) an aromatic bismaleimide generator.