Abstract: Novel telechelic olefin and hydroxy polymers particularly those of polyisobutylene are prepared according to the process set forth herein. Preparation of a telechelic diolefin polyisobutylene includes the steps of refluxing a solution of telechelic dihalogen polyisobutylene, adding a solution of a strong base such as potassium t-butoxide and stirring to form the telechelic diolefin polyisobutylene. This telechelic diolefin can be converted to the telechelic dihydroxy by refluxing a solution of the former, hydroborating the diolefin to a polymeric borane and oxidizing the polymeric borane to form the telechelic dihydroxy polyisobutylene. The processes are also applicable to the conversion of trihalogenated polyisobutylenes to telechelic triolefin and trihydroxy polyisobutylene tristars.
Abstract: A cation exchange membrane of a fluorinated polymer for an electrolysis comprises a structure of a copolymer of a fluorinated olefin and a fluorovinyl compound having the formulaCF.sub.2 .dbd.CX--(OCF.sub.2 CFY).sub.l (O).sub.m (CFY').sub.n COOMwherein X represents --F or --CF.sub.3 ; Y and Y' respectively represents --F or a C.sub.1 -C.sub.10 perfluoroalkyl group; l is 0 to 3; m is 0 or 1; n is 0 to 12 and M represents hydrogen atom or an alkali metal atom; and a modified surface layer of said cation exchange membrane in an anode side which has --SO.sub.3 M groups formed by converting --COOM groups.
Abstract: The invention provides a stable polymeric additive useful for improving the wet strength of a cellulosic substrate. The additive is a water-soluble cationic thermosetting polymer incorporating a plurality of extralinear glycidyl quaternary ammonium groups. The invention also comprises a method of making such an additive.
Abstract: The present invention is concerned with ternary polycarbonate compositions having improved impact strength. The ternary compositions comprise a mixture of thermoplastic, aromatic polycarbonates which are derived from aromatic dihydroxy compounds, an acrylate copolymer and a polyolefin and its oxide.
Abstract: New compositions and a process for the preparation of conjugated diene polymers of broadened molecular weight distribution by reacting non-terminated lithium catalyzed conjugated diene polymers with linear organic compounds selected from the group of carbonates, thiocarbonates and sulfites. The resulting new compositions are suitable for use in making high impact plastics and for fabricating rubber goods.
Abstract: New compositions and a process for the preparation of conjugated diene polymers of broadened molecular weight distribution by reacting non-terminated lithium catalyzed conjugated diene polymers with cyclic organic compounds selected from the group of carbonates, thiocarbonates and sulfites. The resulting new compositions are suitable for use in making high impact plastics and for fabricating rubber goods.
Abstract: A method for preparing a cementitious ion-exchange resin comprising treating cation- or anion-exchange resin particles having an effective diameter of from about 0.1 to about 1 mm with a material selected from the group consisting of polyacrylate emulsions, polyvinyl alcohol, and polyvinyl acetate, the material having a hydrophilic group, drying the treated ion exchange resin into a cementitious mass, and optionally reducing the particle size of the mass to provide cementitious ion exchange resin grains having an effective diameter of from about 2 to about 50 mm.
Abstract: A fluorinated polymer having pendant cation exchange groups selected from sulfonic acid, carboxylic acid or sulfonamide groups, or their salts, is modified with a sulfonium compound and/or a phosphonium compound for substitution of the counter-ions of the cation exchange groups with sulfonium ions and/or phosphonium ions. The polymers treated in this manner are improved in their melt-flow characteristic to make fusion bonding between these polymers possible. The process is particularly suitable for repairing damaged cation exchange membranes for use in chlor-alkali electrolytic cells to advantageously elongate the life of the membranes.
Abstract: This invention provides a method for enhancing wettability of high density polyethylene film, that comprises subjecting said film to plasma surface treatment using oxygen or argon gas atmosphere.
Abstract: This invention relates to a process for the preparation of acrylic polymers which are at least for the most part insoluble in water and have a high swellability in water, by reacting polyacrylonitrile or copolymers based on acrylonitrile at a temperature exceeding 100.degree. C. with aqueous-alkaline solutions which may contain an organic solvent which is miscible with water.
March 4, 1981
Date of Patent:
June 29, 1982
Arno Holst, Eberhard Perplies, Gerhard Buchberger
Abstract: According to this invention, there is provided an anti-migration agent for dyeing comprising a water-soluble, neutral polymer salt of a polymer anion and at least one cation, said polymer anion being a copolymer or a partially esterified matter thereof, said copolymer consisting of at least one monomer selected from the group consisting of C.sub.4 of C.sub.7 conjugated diene and isobutylene and at least one member selected from the group consisting of maleic acid, maleic anhydride and derivatives thereof, and said cation being selected from the group consisting of Na.sup.+, K.sup.+, Li.sup.+ and ammonium ions represented by the general formula R.sub.1 R.sub.2 R.sub.3 R.sub.4 N.sup.+ wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are selected from the group consisting of hydrogen, C.sub.1 to C.sub.6 alkyl, cycloalkyl and phenyl.
Abstract: In a process which comprises catalytically hydrogenating the carbon-carbon double bonds of a conjugated diene polymer, the improvement which comprises using a catalyst composed of a porous powdery or granular carrier and supported thereon both Pd and at least one metal selected from the group consisting of the metals of Groups Ia, IIa, IIIa, IIIb, IVa, Va and VIa of the periodic table, Ge and Sb.
Abstract: The invention relates to a process for preparing ABS polyblends by grafting large diene rubber particles in aqueous latices in the presence of oligomeric surfactants providing large grafted diene rubber particles in latices that are stable and essentially free of coagulum. The ABS polyblends recovered from such latices are free of hard spots and have superior toughness.
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.
August 25, 1980
Date of Patent:
June 22, 1982
Shaul M. Aharoni, Dusan C. Prevorsek, George J. Schmitt, Gary A. Harpell, Lester T. C. Lee
Abstract: A process for the preparation of an electrically conductive polyene, wherein a polyene which contains one or more chain members of the formula where R is hydrogen or methyl, and which contains a total of not less than seven aliphatic double bonds, is treated, in the absence of moisture and of oxygen, with a strong Lewis acid having a pk.sub.a of from -10 to +4, or with an alkali metal.
November 3, 1980
Date of Patent:
June 22, 1982
Franz Feichtmayr, Herbert Naarmann, Joachim Paust, Klaus Penzien
Abstract: A linear polydivinylbenzene having recurring units of Formula (A), ##STR1## and a number average molecular weight of about 500 to about 1,000,000; a linear copolymer having at least about 1% by weight of recurring units of Formula (A) as described above and at most about 99% by weight of recurring units of at least one of Formulae (B) and (C), ##STR2## wherein R.sub.1 and R.sub.2 may be the same or different and each represents a hydrogen atom, a C.sub.1-20 alkyl group, a C.sub.3-10 cycloalkyl group, a C.sub.7-12 arylalkyl group, a C.sub.3-8 alkenyl group, a C.sub.6-15 aryl group, a H.sub.2 N--CH.sub.2).sub.n group wherein n is an integer of 1 to 15 or a H--(NH--CH.sub.2 --CH.sub.2).sub.n group wherein m is an integer of 2 to 8; and R.sub.3 represents a hydrogen atom, a C.sub.1-12 alkyl group, a C.sub.3-10 cycloalkyl group, a C.sub.7-12 arylalkyl group or a C.sub.
Abstract: A polycarbonate composition having improved melt flow and improved impact strength after aging at elevated temperatures comprising polycarbonate resin with polyolefins and a polyorganosiloxane. A preferred composition comprises in admixture a high molecular weight aromatic carbonate polymer and a minor amount of a polyolefin and a polydimethylsiloxane fluid.
Abstract: Compositions comprising asymmetrical peroxydicarbonates and their use in polymerizing ethylenically unsaturated monomers such as vinyl chloride and diethylene glycol bis (allyl carbonate) are disclosed.
Abstract: A process for the preparation of a mixture of linear three-block copolymers which contain from 70 to 80% by weight of styrene units and from 20 to 30% by weight of elastomeric polymer segments based on a conjugated diene, in a total of three stages, specific conditions in respect of the initiator and of the monomers to be polymerized being essential in the individual stages in order to ensure the polymodal structure of the three-block copolymers. After complete reaction of the monomers, the mixture of the living polymers is treated with proton-active compounds, and the mixture of the block copolymers is isolated by removing the solvent. The compositions obtained by the novel process are transparent and clear and have good mechanical properties. They are furthermore readily processable by the methods conventionally used for thermoplastics. The compositions are particularly suitable for the production of moldings and of packaging materials.