Abstract: The catalyst systems comprise as active constituentsa) a metal complex of the formula (I) ##STR1## b) one or more Lewis or protic acids or a mixture of Lewis and protic acids.

Abstract: A catalyst composition is disclosed. The composition comprises a titanium compound, a complexing agent, a solvent, and optionally a cocatalyst. The cocatalyst can be a cobalt/aluminum catalyst, an antimony compound, or combinations thereof. Also disclosed is a process for producing the composition. The process comprises combining a titanium compound, a complexing agent, a solvent, and optionally a cocatalyst. Further disclosed is a process for using the composition which comprises contacting a carbonyl compound, in the presence of the composition, with an alcohol under a condition suitable for esterification, transesterification, polymerization, or combinations thereof.

Abstract: The invention provides a process that can be used for producing a bis-glycolate ester of 5-sulfo isophthalate metal salt. The process comprises contacting a 5-sulfo isophthalate a metal salt or a dialkyl ester of 5-sulfo isophthalate metal salt, in the presence of a catalyst, with a glycol. The catalyst comprises (1) a titanium compound, a solubility promoter, a phosphorus source, and optionally a solvent, (2) a titanium compound, a complexing agent, a phosphorus source, and optionally a solvent, a sulfonic acid, or combinations thereof, or (3) combinations of (1) and (2). The solubility promoter can be selected from the group consisting of ortho silicates, ortho zirconates and combinations thereof. The phosphorus source is selected from the group consisting of a phosphonic acid, a phosphinic acid, a phosphine, and combinations of two or more thereof. The complexing agent can be selected from the group consisting of hydroxycarboxylic acids, aminocarboxylic acids, and combinations thereof.

Abstract: A catalyst composition is disclosed. The composition comprises a titanium compound, a phosphorus compound, an amine, a solvent and optionally a cocatalyst in which the phosphorus compound has a formula selected from the group consisting of (R.sup.1 O).sub.x (PO)(OH).sub.3-x, (R.sup.1 O).sub.y (P.sub.2 O.sub.3)(OH).sub.4-y, and combinations thereof; the amine is a tertiary amine; each R.sup.1 is independently a linear or branched alkyl radical containing from 1 to about 20 carbon atoms per radical; x is 1 or 2; and y is 1, 2, or 3; and the cocatalyst can be a cobalt/aluminum catalyst, an antimony compound, or combinations thereof. Also disclosed is a process for producing the composition. The process comprises combining a titanium compound, a phosphorus compound, a solvent, an amine, a solvent, and optionally a cocatalyst. The phosphorus compound, amie, and solvent are the same as those disclosed above.

Abstract: Polyesters are prepared by the reaction of a dicarboxylic acid, preferably an aromatic acid such as terephthalic acid, or an ester or ester-forming derivative thereof with a dihydroxy compound such as 1,4-butanediol in the presence of a catalyst composition comprising the combination of a titanium-based compound such as tetra-n-butyl titanate, a zirconium-based compound such as zirconium tetrakis(2,4-pentanedionate) and a phosphate-forming compound such as sodium dihydrogen phosphate. This catalyst composition affords polyesters having relatively low melt viscosities in short reaction times and does not produce an excessive level of undesirable reaction by-products.

Abstract: Linear, thermoplastic, elastomneric copolymers of carbon monoxide and olefinically unsaturated compounds have an alternating sequence of repeating units and an average molecular weight Mw of the copolymers of from 80,000 to 1,200,000, binary, linear, alternating carbon monoxide/ethylene copolymers being excluded.

Abstract: An ethylene terephthalate/ethylene-2,6-naphthalene dicarboxylate copolymer comprising 2,6-naphthalenedicarboxylic acid in an amount of 5 to 20 mol % of the total of all dicarboxylic acid components. This copolymer contains Mn, Mg and Co derived from catalysts and P derived from a phosphorus compound as a stabilizer whose amount is controlled to a specific value and is suitable for use as a raw material for molding a bottle having good color (achromatic) and transparency.

Abstract: This invention relates to the process for the preparation of macromonomers with more than one polycondensable functional groups with equal reactvity, which comprises reacting a carboxyl or hydroxyl terminated prepolymers, with an organic compound containing two or more isocynnate reactive functional groups, in the presence of a dehydrating agent and a non-reactive solvent at ambient temperatures, separating the product from the reaction mixture by conventional means.

Abstract: A poly(ethylene terephthalate) polyester composition which is decreased in the amount of a cyclic trimer of ethylene terephthalate formed in melting, and a method for producing the same.

Abstract: A method for making a polyester resin comprises reacting a first polyfunctional alcohol or polyfunctional thiol and a carbonate in the presence of a catalyst to form an alkoxylated intermediate. The catalyst comprises: (1) a metal, a salt of a metal, or mixtures thereof and (2) a quaternary ammonium salt, a tertiary amine, an imidazole, or mixtures thereof. The alkoxylated intermediate is then reacted with a polyfunctional organic acid or anhydride thereof to form the polyester resin.

Abstract: A process for the preparation of polyoxymethylene copolymers, wherein 1,3,5-trioxane is polymerized with generally known comonomers in the presence of a strong protonic acid initiator and in the presence of a formaldehyde dialkyl acetal, and wherein the initiator is dissolved in the formaldehyde dialkyl acetal before admixing to the trioxane and the comonomers.

Abstract: Disclosed herein is an esterification process characterized by the high dilution in situ addition of antimony catalyst compound and phosphorus stabilizer compound to the esterification reaction mixture. A high dilution polymerization process for producing antimony phosphate derivative-containing polymer is also disclosed. Further disclosed are high clarity polyesters containing sub visual antimony phosphate derivative particles.

Abstract: A pentosanpolysulfate coating on medical devices reduces or eliminates side effects associated with the introduction of foreign bodies into the urinary tract of a patient. The pentosanpolysulfate coating attenuates the attachment of salts, minerals, proteins, salt, and other undesirable materials onto the medical device used in the urinary tract. Inflammatory or foreign body reaction to these pentosanpolysulfate coated medical devices are also attenuated, and growth of healthy normal tissue in the vicinity of the coated medical device of the present invention is allowed.

Abstract: Disclosed are novel crosslinked polymers derived from methylol phenols and maleic acid species, and methods of synthesizing these macromolecules. Polyesters and chromandicarboxylic groups are the dominant linkages in the structure of general formula: ##STR1## R is H or a spacing group between aromatics, R.sub.1 is an aldehyde substituent, R.sub.2 a spacing group belonging to multihidric alcohols, a maleyl grouping, and n a whole number either 0 or 1.

Abstract: A process for the preparation of a copolymer of carbon monoxide with an olefinically unsaturated compound in which a powder of a copolymer of carbon monoxide with an olefinically unsaturated compound is suspended in a liquid diluent. The suspension is contacted with a catalyst composition which is soluble in the diluent and which is based on a Group VIII metal and a bidentate ligand. The catalyst composition is used in such a quantity that in the polymerization mixture more than 0.1 mmoles of the Group VIII metal is present per liter of liquid phase.

Abstract: A catalyst composition for use in the preparation of a polyester or copolyester is disclosed. The catalyst composition comprises the combination of (a) a titanium-based compound or zirconium-based compound, and (b) a lanthanide series compound or hafnium. Various titanium-based compounds and lanthanide-based compounds are described. Moreover, in some embodiments, the catalyst composition may further comprise a phosphate-forming compound. Another aspect of this invention is an improved method for preparing a polyester, based, for example, on the two-stage process of ester interchange and polycondensation. The method is carried out in the presence of the catalyst composition described above.

Abstract: A continuous process for producing polyethylene terephthalate polyester from terephthalic acid and ethylene glycol uses a stabilizer, preferably containing phosphorous, to produce a high quality polyethylene terephthalate polyester which is relatively free of the acetaldehyde and discoloration which are associated with the post-polymerization activity of a polymerization catalyst. The stabilizer is preferably added at or after the end of the polymerization reaction prior to polymer processing to deactivate the polymerization catalyst and can increase the throughput of the polyester without adversely affecting the thermal stability of the polyethylene terephthalate polyester. Alternatively, the late addition of the stabilizer can increase the thermal stability of the polyester without adversely affecting the throughput of the polyethylene terephthalate polyester.

Abstract: A copolyester for molding a bottle which comprises 95 to 87 mol % of naphthalenedicarboxylic acid and 5 to 13 mol % of terephthalic acid as dicarboxylic acid components and a diol component consisting essentially of ethylene glycol, has an acetaldehyde content of 20 ppm or less and an intrinsic viscosity of 0.40 to 0.85 dl/g, and produces acetaldehyde in an amount of 30 ppm or less when the copolyester is kept molten with stirring at 300.degree. C. for 5 minutes.

Abstract: The present invention provides a novel poly(1,3-propylene terephthalate), which is prepared from reacting terephthalic acid and 1,3-propanediol in the presence of an effective catalytic amount of ethylene glycol titanate to undergo esterification to form a monomer; and polymerizing the monomer in the presence of an effective catalytic amount of antimony acetate to obtain poly(1,3-propylene terephthalate). The obtained poly(1,3-propylene terephthalate) (PPT) has an intrinsic viscosity (IV) of 0.65-0.91 dl/g, acid number (--COOH amount) of less than 40 meq/kg, and L*>60. Without adding a pigment, the yellowness b* of PPT is below 9, even below 5. The yellowness b* of PPT even reaches below 3 when a pigment is incorporated.

Abstract: A polyester comprises a dicarboxylic acid moiety comprising terephthalic acid or its ester forming derivative and a diol moiety comprising ethylene glycol and 1,4-cyclohexanedimethanol of 10 to 60 mol % based on the whole diol moiety, the intrinsic viscosity of the polyester being 0.68 to 0.95 dl/g, the "b" value of color tone of the produced pellets of polyester being -5 to 5, the number of the carboxylic acid terminals being not more than 30 eq/ton, and the sum of the numbers of the vinyl terminals, the vinylidene terminals and the methylcyclohexene terminals being not more than 25 eq/ton.

Abstract: A container formed from a copolyester composition which comprises a copolyester containing 80 to 95 mol % of terephthalic acid and 20 to 5 mol % of 2,6-naphthalenedicarboxylic acid as acid components and ethylene glycol as a glycol component, wherein catalyst metals of a calcium compound, magnesium compound and cobalt compound are contained in the copolyester in such amounts that satisfy all the following expressions (1) to (4) based on the total of the whole acid component of the polymer:0<Ca.ltoreq.35(mmol %) (1)0<Mg.ltoreq.80(mmol %) (2)40.ltoreq.(Mg+Ca).ltoreq.90(mmol %) (3)0.ltoreq.Co.ltoreq.15(mmol %) (4).The above polyester container is excellent in gas barrier property, ultraviolet light screening property, hot water resistance, hue and transparency, is not whitened and has a small content of aldehyde.

Abstract: Poly(hydroxyaminoether) ammonium salts are prepared by contacting a poly(hydroxy amino ether) with a protonic acid or an alkyl halide in an amount and under reaction conditions sufficient to form a poly(hydroxy amino ether) ammonium salt having an oxygen transmission rate of less than about 0.5 cm.sup.3 -mil/100 in.sup.2 -atm(O.sub.2)-day.

Abstract: The invention provides an economical and efficient process for preparing a dimeric cyclic ester of an .alpha.-hydroxycarboxylic acid by depolymerizing a corresponding .alpha.-hydroxycarboxylic acid oligomer, which comprises the steps of (1) heating a mixture containing the .alpha.-hydroxycarboxylic acid oligomer and at least one high-boiling polar organic solvent having a boiling point within a range of 230.degree.-450.degree. C. to a temperature, at which the depolymerization of the oligomer takes place, under atmospheric pressure or reduced pressure, (2) dissolving the oligomer in the solvent until a residual rate of a melt phase of the oligomer reaches 0.5 or lower, (3) further continuing the heating at the temperature, at which the depolymerization of the oligomer takes place, to depolymerize the oligomer, (4) distilling out the dimeric cyclic ester formed together with the high-boiling polar organic solvent, and (5) recovering the dimeric cyclic ester from the distillate.

Abstract: Aqueous polymer emulsions contain dispersants based on natural lecithins.

Abstract: A method for producing a polycarbonate pellet which comprises subjecting a melt-extruded polycarbonate to a cooling step and a cutting step, the steps being carried out in either order or simultaneously, and wherein the cooling step is performed by contacting the polycarbonate with a cooling water having an electric conductivity of 1 mS/cm or less as measured at 25.degree. C.

Abstract: A process for the preparation of a copolymer of carbon monoxide with an olefinically unsaturated compound, comprising copolymerizing the monomers in the presence of a Group VIII metal containing catalyst composition and in the presence of an olefinically unsaturated compound (A) which contains in its molecular structure an organic group imparting steric hindrance on the vinyl group. A copolymer obtainable by the said process.

Abstract: A process for the preparation of copolymers of carbon monoxide with an olefinically unsaturated compound comprising copolymerizing the monomers in the presence of a catalyst composition based upon(a) a salt of a Group VIII metal, and(b) a cation which is selected from cationic oxidants and cations of the general formulae R.sub.n H.sub.4-n N.sup.+, R.sub.m H.sub.3-m C.sup.+ and R.sub.m H.sub.3-m O.sup.+, wherein n is 0, 1, 2, 3 or 4, m is 2 or 3, and R represents a hydrocarbyl group and/or two or three of R together with the atom carrying a positive charge represent a ring structure, on the understanding that when n is 3, at most two of R together with nitrogen represent a heterocyclic ring structure, and when n is 4, three of R together with nitrogen represent an aromatic heterocyclic ring structure.

Abstract: This invention relates to a thermally stable polyester, comprising:a polyester resin prepared by adding a dicarboxylic acid to a glycol compound, said dicarboxylic acid selected from the group consisting of aliphatic dicarboxylic acids having a total of from 3 to 16 carbon atoms, alicyclic dicarboxylic acids having 7 to 12 carbon atoms, aromatic dicarboxylic acids containing a total of from 8 to 16 carbon atoms, and combinations thereof, and wherein said glycol is selected from the group consisting of glycols having from 2 to 12 carbon atoms, glycol ethers having from 4 to 12 carbon atoms, and combinations thereof,said polyester resin having been prepared in the presence of a catalyst system consisting essentially of one or more antimony compounds which is not reacted with .alpha.-hydroxy carboxylic acids, .alpha.,.beta.-dicarboxylic acids or derivatives thereof.

Abstract: The invention relates to compositions for flame-retardant cast panels made of (meth)acrylic polymers.The composition comprises at least one (meth)acrylic ester monomer, (meth)acrylic acid and at least one phosphorus compound which is anhydrous and is chosen from phosphoric acids, phosphoric acid esters or their mixtures, optionally in combination with an optionally halogenated neutral phosphoric ester. The amount of (meth)acrylic acid and of phosphorus compound, by weight with respect to the total mixture constituting the composition, is such that the flame-retardancy coefficient FRC: ##EQU1## is greater than 0.95.

Abstract: This invention relates to a process of producing a moldable polyethylene terephthalate or modified polyethylene terephthalate having an inherent viscosity greater than 0.6 dL/g comprising reacting the diacid component with the diol component such that a combination of a titanium-based catalyst and a phosphorus-based catalyst is used during the polycondensation steps.

Abstract: Oxysulfonylated polyesters, well suited for conversion into oriented composite polyester films, are prepared by polycondensing a lower alkyl diester of at least one aliphatic dicarboxylic acid and a lower alkyl diester of at least one aromatic dicarboxylic acid bearing an oxysulfonyl substituent, and optionally a lower alkyl diester of at least one aromatic dicarboxylic acid, with at least one diol, in the presence of a catalytically effective amount of at least one titanium compound and at least one manganese carboxylate.

Abstract: A process for the preparation of alternated linear copolymers based on carbon monoxide and one or more compounds having an unsaturation of the alkenylic type comprises, reacting in a halogenated aromatic or aliphatic solvent the carbon monoxide and one or more compounds having an alkenylic unsaturation in the presence of a catalyst having general formula (I)?Pd(chel)(chel')!.sup.+ ?A.sup.- !wherein: chel represents a non-charged bidentate chelating agent, chel' represents the anion of an organic compound containing a double carbon--carbon bond co-ordinated via .pi. bond to palladium (Pd) and a carbanion bound via .sigma. bond to palladium which is co-ordinated to the metal as a bidentate chelating agent and A.sup.- is an anion of a non-esterifiable or almost non-esterifiable and non-coordinating acid.

Abstract: A zeolite polycondensation catalyst comprising an alkali- or alkaline earth metal aluminum silicate zeolite having an original water content of 12 to 30 weight % and a solubility, measured at 260.degree. C., in an esterification mixture consisting essentially of bis(hydroxy ethylene)terephthalate, of over 8.0 weight %, and an average particle size of less than 1.0.mu.. The present invention is also a process for the production of polyester using this catalyst.

Abstract: A process for the preparation of a linear alternating copolymer of carbon monoxide with ethene and another olefinically unsaturated compound (A) wherein a copolymer of which the molar ratio (r.sub.1) of the monomer units originating in the olefinically unsaturated compound A to the monomer units originating in ethene is in the range of from 1:100 to 1:3, is prepared by contacting the monomers in the presence of a liquid diluent with a catalyst composition which is based on(a) a source of a Group VIII metal, and(b) a bidentate ligand of the general formula R.sup.1 R.sup.2 M.sup.1 --R--M.sup.2 R.sup.3 R.sup.4 (I) wherein M.sup.1 and M.sup.2 independently represent a phosphorus, arsenic or antimony atom, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent unsubstituted or substituted hydrocarbyl groups and R represents a bivalent bridging group which consists of three atoms in the bridge of which the middle atom is a carbon or silicon atom which carries two monovalent substituents R.sup.5 and R.sup.

Abstract: This invention relates to solid elastomeric polyurethanes prepared by reacting, in an open mold at an isocyanate index of 80 to 120,(a) an isocyanate prepolymer having an isocyanate content of 3 to 15% by weight and a number average molecular weight of 550 to 20,000 prepared by the reaction of(1) organic polyisocyanates having 2 to 3 NCO groups, and(2) isocyanate-reactive polyester polyols having two to three isocyanate-reactive hydroxyl groups and a number average molecular weight of 400 to 10,000 and prepared in the presence of an esterification catalyst, and optionally containing other isocyanate-reactive compounds,wherein the equivalent ratio of isocyanate groups to isocyanate-reactive groups is 1.2:1 to 34:1;(b) a diol chain extender, optionally in admixture with a crosslinker and/or an amino-containing chain extender and/or crosslinker;(c) 0.001 to 10% by weight, based on the weight of the isocyanate prepolymer, of a catalyst; and(d) 0.

Abstract: An improved process is described for the preparation of alternating linear copolymers based on carbon monoxide and at least one compound containing an alkenyl unsaturation which comprises reacting in a liquid solvent under the operating conditions, a mixture of carbon monoxide and one or more compounds containing an alkenyl unsaturation in the presence of:(i) a catalyst having general formula (I)?Pd(chel) (chel') !.sup.++ ?A.sup.- !.sub.2 (I)wherein chel and chel' the same or different, represent a nitrogenated or phosphorated bidentate chelating agent, and A.sup.- represents an essentially non-coordinating, non esterifiable and non labile anion of an acid with pKa less than 2; and(ii) a cocatalyst having general formula (II)?chel"H.sup.+ !?A'.sup.- ! (II)wherein A'.sup.-, the same as or different from A.sup.-, has the same meaning defined above and chel" represents a nitrogenated bidentate chelating agent the same as or different from chel and chel'.

Abstract: A method for preparing polyester by use of a catalyst. The method comprises the steps of: esterifying either a terephthalic acid, a dicarboxylic acid containing terephthalic acid or derivatives thereof with either ethylene glycol or a glycol containing ethylene glycol, or derivatives thereof to produce an esterification product containing either bis(.beta.-hydroxyethyl) terephthalate, its low molecular weight polymer, or a combination of .beta.-hydroxyethyl terephthalate and its low molecular weight polymer; and continuously polycondensing the obtained esterification product to prepare a polyester, wherein in the said polycondensing step, a composite polymerization catalyst dissolved in an ethylene glycol or an ethylene glycol-containing solution, consisting of a compound of antimony, a compound of titanium, and a compound of tin is used.

Abstract: A catalyst composition which is based upon(a) a source of nickel cations, and(b) a bidentate ligand of the general formula R.sup.1 R.sup.2 M.sup.1 --R--M.sup.2 R.sup.3 R.sup.4 (I) wherein M.sup.1 and M.sup.2 represent independently phosphorus, nitrogen, arsenic or antimony, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent independently optionally polar substituted hydrocarbyl groups on the understanding that at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent a substituted aryl group, and R represents a bivalent bridging group of which the bridge consists of at most two bridging atoms, and a process for the preparation of copolymers of carbon monoxide and an olefinically unsaturated compound comprising ontacting the monomers in the presence of the said catalyst composition.

Abstract: Process for the preparation of polyimides or of their polypeptide hydrolysates which are at least 80% biodegradable, by thermal polycondensation of at least one amino acid, optionally followed by hydrolysis, the thermal polycondensation step being carried out in the presence of at least one "acid catalyst" chosen fromsulphuric, nitric, phosphorous, sulphurous, hydrofluoric, silicic and sulphonic acids, organic sulphonic acids containing less than 50 carbon atoms, amino acids bearing a non-carboxyl strong acid function, organic phosphonic acids, organic carboxylic acids having a pK.sub.

Abstract: A process for the copolymerization of carbon monoxide with an olefinically unsaturated compound in which a solid particulate material is suspended in a liquid diluent in which the polymer to be produced forms a suspension. The monomers are contracted in the liquid diluent containing the suspended solid particulate material with a catalyst composition which is based on a source of a Group VIII metal and a boron hydrocarbyl compound.

Abstract: A process for the copolymerization of carbon monoxide with an olefinically unsaturated compound in which the monomers are contacted in the presence of a liquid diluent and a protic compound with a catalyst composition which is based on a source of a Group VIII metal and a hydrocarbylborane. A stirring power is transmitted to the polymerization mixture of at least 0.25 kW/m.sup.3.

Abstract: An aqueous organosiloxane liquid composition in a homogeneous state is disclosed, which contains (A) aqueous modified organosilicon compound having at least one polyether group as a side chain, (B) liquid organopolysiloxane, (C) a cross-linking agent, (D) a curing catalyst and, optionally, (E) a filler. This composition undergoes uniform curing, when exposed to the atmosphere of a temperature of up to 300.degree. C., to form a siloxane polymer composition in a form of a film, fibers, a composite structure, a composite sheet or a building material. The composition can also be used as a coating composition or varnish.

Abstract: In the production of a flame resistant, halogen-free polyurethane/polyurea from a polyisocyanate and polyol, wherein to the mixture of polyisocyanate and polyol there is added an amine adduct of an acidic metal salt of the formulaA.sub.1-3 B.sub.0-12 P.sub.3-9 N.sub.4-12 M.sub.0-9 xH.sub.2 O(I),in whichA denotes at least one hydroxide or oxide of a metal selected from the group consisting of aluminum, magnesium, calcium and zinc,B denotes o-boric acid,P denotes an acid containing phosphorus,N denotes at least one of an amine or ammonia,M denotes an alkali metal hydroxide andx denotes an integer from 0 to 90.The products are especially flame resistant foams.

Abstract: This invention relates to a polyester resin prepared by adding one or more dicarboxylic acid components to one or more glycol components containing 1,4-cyclohexanedimethanol equalling 100 mole %,the polyester resin having been prepared in the presence of a catalyst/stabilizer system consisting essentially of antimony compounds and phosphorous compounds and compounds selected from the group consisting essentially of zinc compounds, gallium compounds, and silicon compounds.

Abstract: A catalyst composition comprisinga) a palladium compound,b) an anion, andc) an asymmetric phosphorus bidentate ligand of the general formula R.sup.5 R.sup.6 P--Q--CHR.sup.9 --PR+7R.sup.8, wherein Q is a 1,2-ferrocenyl bridging group, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are identical or different optionally polar substituted hydrocarbyl groups and R.sup.9 is hydrogen or an optionally polar substituted hydrocarbyl group;a process for the preparation of linear alternating copolymers of carbon monoxide with an aliphatic -olefin having at least 3 and at most 10 carbon atoms, which process comprises contacting a mixture of the monomers with a said catalyst composition; and a linear alternating copolymer of carbon monoxide with an aliphatic -olefin having at least 3 and at most 10 carbon atoms which copolymer has an isotacticity of 95% or more.

Abstract: Process for continuous preparation of homo- and copolyoxymethylenes with stable end groups in a homogeneous phase, in which in a tubular reactor with static mixing elements cyclic formaldehyde oligomers are polymerized in the presence of protonic acids as initiators in amounts of 0.005 to 500 ppm in a polymerization zone, in which the residence time of the reaction components in this zone is 0.1 to 10 min and in which the initiator is deactivated immediately after polymerization, there being a fluid transition between the polymerization and deactivator zones which is determined solely by the addition of deactivator, and in which, besides deactivation, stabilization of the chain ends is carried out in the presence of residual monomers, with the volatile constituents being removed from the reaction mixture in a subsequent vent unit. Stabilization is carried out in the presence of alkaline substances, either at temperatures of 150.degree. C. to 250.degree. C.

Abstract: A two-component urethane adhesive is disclosed which requires no primer or pretreatment of the substrate. The adhesive in cured form has superior paint adhesion and can withstand high temperature bake cycles without substantial losses in adhesion to the substrate. The adhesive differs from prior adhesives in that essentially all of the high molecular weight polyols in the prepolymer component are the reaction product grafting reactions of acrylonitrile onto polypropylene polyols.

Abstract: The present invention is directed to an underlayment composition for an artificial playing surface comprised of a butadiene rubber, such as polybutadiene or styrene-butadiene that is commercially available as recycled polycord tires that have been granulized. An inorganic-base moisture-retaining agent such as vermiculite or perlite is also included in the composition in addition to a binder comprised of a mixture of isocyanate polyurethane and an inorganic acid. The present invention also provides a method of making the present composition. The method comprises the steps of mixing thoroughly granulized particles of butadiene rubber in a mixing container, mixing an inorganic-based moisture-retaining component with the butadiene rubber, mixing an acid having a pH .ltoreq.3 with the butadiene rubber and the inorganic-based moisture-retaining component, and mixing an isocyanate polyurethane with the butadiene rubber, the inorganic-based moisture-retaining component and the acid.

Abstract: The invention relates to a polyester resin for producing a thick-walled bottles having high transparency and a neutral color. The polyester resin, containing at least one antimony compound, one germanium compound and one phosphorus compound, is produced by reacting a dicarboxylic acid with polyhydric alcohols and also contains cyclohexane dimentanol. The polyhydric alcohols are a mixture of ethylene glycol and at least 0.5% cyclohexane dimethanol. The result, more particularly, is a low rate of crystallization for obtaining thick-walled hollow members.

Abstract: A corrosion-resistant coating which can be applied directly to a surface as self-priming corrosion-resistant topcoat comprising an alkyd resin binder and a combination of pigments consisting essentially of an aluminum triphosphate, zinc salts of benzoic acids, and an alkaline earth metal phosphate such as zinc-barium phosphate. In addition, the coating contains up to about 40 parts by weight of a titanium dioxide pigment, up to about 2.0 parts by weight of an oil-soluble surface active or wetting agent and up to about 40 parts by weight of at least one organic solvent.