Abstract: A process is provided for the production of a polymer of reduced molecular weight by subjecting, in bulk form, a halogenated butyl polymer having at least 75 percent of the unsaturation in the EXO methylene configuration to mastication in an extruder while exposing the masticated polymer to an atmosphere containing ozone. Such reduced molecular weight polymers have an M.sub.n of from about 10,000 to about 40,000 and may be used in caulks and sealants.

Abstract: A chelate resin having a functional group of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are each independently hydrogen, alkyl, aminoalkyl, phenyl or a substituted group thereof and another functional group of the formula: ##STR2## wherein R.sub.3 is amino, alkylamino, polyethylenepolyamino, hydrazo, hydrazino, hydrazono, amidino, guanidino, semicarbazide or a substituted group thereof, has an excellent adsorption capacity for metal ions.

Abstract: Water soluble polyamines useful as flocculating agents are prepared by reaction of acrylonitrile polymers in solution with dialkylaminoalkylamines using ammonium polysulfide as catalyst.

Abstract: Water soluble polyamines useful as flocculating agents are prepared by reaction of acrylonitrile polymers in solution with dialkylaminoalkylamines using ammonium polysulfide as catalyst.

Abstract: The wettability of polyolefin or polyester film for use as a heat exchange membrane, e.g. tubes or sheets, in a heat exchanger is increased, generally to a surface tension reading in excess of 70 dynes/cm, by treating the surface of the film with a strong oxidizing agent, particularly gaseous sulphur trioxide. The heat transfer coefficient is thereby improved. Tubes of such plastics material having a treated outer surface and an untreated inner surface are particularly useful for exchanging heat between a liquid flowing over the outer surface and a gas or vapor condensing within the tube.

Abstract: Compositions that cure when heated comprise(A) an epoxide resin and(B) an effective amount of(i) a diaryliodosyl salt of formula ##STR1## where R.sup.1 and R.sup.2, which may be the same or different, each represents a monovalent aromatic radical of from 4 to 25 carbon atoms, such as a substituted or unsubstituted phenyl group,M represents a metal or metalloid atom, such as phosphorus or boron,X represents a halogen atom, particularly chlorine or fluorine, andn is 4, 5, or 6, and is greater by one than the valency of M or MX.sub.n.sup.- represents pentafluorohydroxoantimonate, and(ii) a catalyst for the diaryliodosyl salt which is a salt or complex of a d-block transition metal, a stannous salt, an organic peroxide, or an .alpha.-hydroxy compound.Typically, the epoxide resin (A) is a bisphenol A diglycidyl ether, the salt (i) is diphenyliodosyl tetrafluoroborate or hexafluorophosphate, and the catalyst (ii) is cupric acetylacetonate or benzpinacol.

Abstract: This invention relates to a process for controlling viscosity during the preparation of modified or grafted low viscosity polyethylene and ethylene/alpha olefin waxes comprising reacting the low viscosity waxes with an unsaturated polycarboxylic component in the presence of a free radical source and at least one viscosity stabilizer.

Abstract: Partially unsaturated polymers are dissolved in a two component solvent comprising a first component having a reactivity toward ozone less than carbon-carbon double bonds but more reactive than carbon-carbon single bonds and a second component being inert toward ozone. Introduction of ozone into the solution produces ozonides which are readily cleft into difunctional aliphatic species that can be converted to e.g. carboxy-terminated or multifunctional carboxy substituted aliphatic compounds. These may be used as monomeric species in various polymerization schemes as such, in preparation of polyamides, for example, or may be reduced to aldehydes or alcohols to be used in the preparation of such polymers as polyesters, polyurethanes, poly (Schiff bases), etc. The carboxylated products may also be employed as ionomers, which are useful as surfactants. Monocarboxyl terminated polyethylene having a number average molecular weight of from about 4,000 to 100,000 are provided.

Abstract: A rubbery polymer composition comprises a crosslinked copolymer comprising the following components.Type I15 to 40 wt. parts of a vinyl carboxylate having the formula (I); 60 to 85 wt. parts of an alkoxyalkyl acrylate having the formula (II); 0 to 15 wt. parts of ethylene; (100 wt. parts of a total of said three components); 0 to 5 wt. parts of the components having the formula (III), (IV) or (V):Type II15 to 55 wt. parts of a vinyl carboxylate having the formula (I); 5 to 20 wt. parts of ethylene; an alkyl acrylate having the formula (II'); an alkoxyalkyl acrylate having the formula (II) (100 wt. parts of a total of said four components and more than 0.8 of a ratio of the alkoxyalkyl acrylate (II) to the alkyl acrylate (II') by weight); 0 to 5 wt. parts of the components having the formula (III), (IV) or (V):(I): RCOO--CH.dbd.CH.sub.2wherein R represents a C.sub.1-4 alkyl group.(II): CH.sub.2 .dbd.CHCOO--R.sub.1 --O--R.sub.2wherein R.sub.1 represents a C.sub.1-4 alkylene group; and R.sub.2 represents a C.

Abstract: The molecular weight of chlorine containing elastomers are increased by adding sulphur compounds before or during the chlorination of elastomers.

Abstract: A cross-linked product of ethylene-hexafluoropropylene copolymer is a good elastic material and has excellent resistance to attack by uranium hexafluoride even at a high temperature. Components made of said copolymer exhibit surprisingly long life, when used in a uranium enrichment plant.

Abstract: Rubber-modified terpolymers of from 50 to 83% of a monoalkenyl aromatic monomer, from 15 to 30% of an unsaturated dicarboxylic acid anhydride, from 2 to 20% of an unsaturated nitrile are described which are useful as molding compositions.

Abstract: Vinyl polybutadiene bisimide copolymers which are peroxide curable are provided by two methods of formation. In the first method a bisimide cross-linked vinyl polybutadiene prepolymer is formed by combining a high vinyl content polybutadiene providing pendant vinyl groups with a bisimide in the presence of a first free radical initiating catalyst. The resultant cross-linked prepolymer is cured to a hard resin by the formation of additional cross-linkages through the pendant vinyl groups by heating the prepolymer to a temperature of at least about 300.degree. F. in the presence of a second free radical initiating catalyst. The second method discloses a method wherein the bisimide cross-linkages are formed in situ. In the second method, a high vinyl content polybutadiene providing pendant vinyl groups is reacted with maleic anhydride to form a maleic anhydride vinyl polybutadiene adduct. The adduct is subsequently combined with an aromatic polyamine and a free radical initiating catalyst.