摘要:
A catalyst composition is provided with an activator in combination with a primary catalyst system. The primary catalyst system is a vanadium compound and an organometallic compound of the formula RMgX, LiAlr.sub.4, or R.sub.A Al.sub.2 X.sub.B, wherein R is a hydrocarbon radical having 1 to 12 carbon atoms, X is a halogen atom; A is a number from 2 to 6, and B is a number from 0 to 4, with the proviso that the sum of A and B is 6 and that at least one of the groups attached either to the vanadium compound or to the organometallic compound is a halogen atom. The activator is bis(trichloromethyl) sulfone.
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-methanonaphthalene-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:
The known compound, 1,2,3,4,9,9-hexachloro-1,4-dihydro-1,4-methanonapthalene-5,8-diol (I) is an excellent flame retardant for ABS resins and polyurethanes, particularly, polyether-based polyurethanes. Compound (I) also forms novel molecular complexes with weak bases such as pyridine, pyridine HCl, pyridine oxide, dimethylsulfoxide and dimethylformamide, and which are excellent flame retardants for ABS resins. Compound (I) also exhibits unusual synergistic flame retardant effects in ABS resins and other polymers when used together with certain additives that are not themselves flame retardants.
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 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-methanonaphthalene-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 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-methanonaphthalene-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 is function.
摘要:
Low molecular weight copolymers comprised of ethylene, an alphaolefin and (optionally) a nonconjugated polyene, which copolymers have a viscosity index of at least about 75 and vinylidene-type unsaturation, possess unexpected advantages as intermediates in epoxy-grafted electrical encapsulation compositions.
摘要:
A catalyst composition is provided with an activator in combination with a primary catalyst system. The primary catalyst system is a vanadium compound and an organometallic compound of the formula RMgX, LiAlr.sub.4, or R.sub.A Al.sub.2 X.sub.B, wherein R is a hydrocarbon radical having 1 to 12 carbon atoms, X is a halogen atom; A is a number from 2 to 6, and B is a number from 0 to 4, with the proviso that the sum of A and B is 6 and that at least one of the groups attached either to the vanadium compound or to the organometallic compound is a halogen atom. The activator is a chlorinated tetrahydrofurfuryl tetrahydrofuroate, an alkyl ester of chlorinated tetrahydrofuroic acid wherein the alkyl group has 1 to 8 carbon atoms, a chlorinated alkylene bistetrahydrofuroate wherein the alkylene group has 2 or 3 carbon atoms, a chlorinated oxy-bis [alkylene (2-furoate)], wherein the alkylene group is ethanediyl, 1,3 propanediyl, alkyl substituted ethanediyl or alkyl substituted 1,3 propanediyl wherein the alkyl group on the ethanediyl or 1,3 propanediyl has 1 to 8 carbon atoms, or bis (trichloromethyl)sulfone.
摘要:
An EPM or EPDM type of elastomer is modified by graft copolymerization with acylic ester type of monomeric material, said monomeric material being material whose homopolymer has a glass transition temperature of not greater than 6.degree. C., in an amount sufficient to provide an ester group (--COO--) content of from 25 to 40% by weight, to yield a mixed copolymerizate vulcanizable to a heat and oil resistant elastomeric state.
摘要:
There are disclosed novel, dodecahalo-9,10-oxadecahydro-1,4:5,8-dimethanoanthracenes which are useful as flame retardant additives for acrylonitrile-butadiene-styrene (ABS) gum plastics and other polymeric materials, and a method for preparing these novel anthracenes.