Abstract: An anhydride-cured epoxy resin (epoxy resin+anhydride curing agent+catalyst) may be fortified (i.e. increased in strength and modulus without being made brittle) by the addition of a carboxylic acid and the reaction product of a carboxylic acid anhydride and a substituted aromatic amine. Strengths as high as 125 MPa and moduli as high as 3500 MPa have been attained, as well as elongations up to 6% and an increase in the ability of the plastic to yield before fracture (ductility), compared to 80 MPa strength, 3000 MPa modulus and 2.4% elongation for the unfortified system (strengths and moduli are tensile).

Abstract: The addition of a small amount of a second epoxide to the copolymerization of ethylene oxide or propylene oxide with carbon dioxide can give a melt processable polyalkylene carbonate terpolymer which can be processed without extensive thermal decomposition. This invention has particular utility in thermoplastic applications such as injection molding, blow molding, and film manufacture.

Abstract: Non-fluorinated epoxy resins of a known type are cross-linked by means of polyfunctional fluoroalkanes containing groups which are reactive with the epoxy groups and/or with the hydroxy groups present in the starting resin. The cross-linked products so obtained, having a fluorine content not higher than 15% by weight, and preferably ranging from 1% to 5%, exhibit a complex of properties which are typical of the corresponding fluorinated resins having a much higher fluorine content; in particular, oil- and water-repellency, resistance to hydrolysis and to solvents, and minimum absorption of water.

Abstract: The present invention provides a biodegradable high molecular polymer characterized in that the content of water-soluble low molecular compounds, as calculated on the assumption that said compounds each is a monobasic acid, is less than 0.01 mole per 100 grams of said high molecular polymer.The thus-obtained high molecular polymer has good aging stability and can be used advantageously as an exipient for pharmaceutical preparations.

Abstract: Adhesive active finish compositions for synthetic reinforcing members to bond the latter to vulcanizable rubber and reinforcing members for vulcanizable rubber. The adhesive composition comprises a water soluble epoxy compound, from about 20 to 100 parts by weight of a trialkanolamine having from 3 to about 15 carbon atoms and from about 0 to 80 parts by weight of a polyol co-curative having from 2 to about 15 carbon atoms and having at least 2 primary hydroxyls per molecule, wherein the stoichiometric ratio of hydroxyl groups to epoxy groups from the water soluble epoxy compound ranges from about 1:0.7 to 1:0.0003. A method of reinforcing articles of vulcanizable rubber with fibrous members includes the steps of applying to the fibrous member a first coating of the adhesive active finish; applying a second coating comprising resorcinol, formaldehyde and a rubber latex over the first coating; embedding the coated fibrous member in the vulcanizable rubber and, vulcanizing the rubber.

Abstract: A water-soluble, thermosetting resin comprising units derived from tris(2-aminoethyl)amine, and preferably units derived from dicyandiamide and/or epichlorohydrin, is useful as an accelerator in paper sizing, e.g. using an alkyl ketene dimer.

Abstract: Disclosed is a thermally-curable, one-part epoxy adhesive composition comprising: (1) a glycidyl ether epoxide having a048477475 n epoxy functionality grater than one and a molecular weight between about 150 and 10,000; (2) a catalyst comprising (i) an acid of the formula H.sup.+ SbF.sub.5 X.sup.- wherein X is halogen, hydroxy, or --OR where --OR is the residue of an aliphatic or aromatic alcohol having a molecular weight less than about 10,000 and (ii) N,N-diethyl-o-toluidine; (3) an aliphatic or non-aromatic cyclic polyol having about 2 to 18 carbon atoms, at least two hydroxy groups of which are primary or secondary, and being free of electron-withdrawing substituents, amine substituents, or large substituents that cause steric hindrance in the .alpha.-position in relation to the carbon attached to the methylol group of the polyol; and (4) a toughening agent that does not react with the epoxide during curing and has an epoxide compatible component and an epoxide incompatible component.

Abstract: An adhesive resin composition comprising (a) an expoxy resin, (b) a curing agent therefor, and (c) an aluminum orthophosphate-zinc compound rust inhibiting pigment. When applied to the assembly of car body components, the composition assures improved bond strength and corrosion resistance.

Abstract: A method for the reduction in vivo of the inappropriate levels of endogenous and environmental-derived compounds by inhibiting the activity of .beta.-glucuronidase in a mammal which comprises the administration to the mammal of an effective amount of a water insoluble, or sparingly soluble, sustained release precursor of glucarolactone or its analog is disclosed. The sustained release precursor of glucarolactone compound is selected from the group consisting of D-glucaric acid, D-galactaric acid, and L-idaric acid or derivatives or analogs. An orally administrable preparation of the sustained release precursor of glucarolactone compound is provided in the form of a capsule tablet, such that the glucarolactone or its analog is slowly released in the stomach of the treated animal or human.

Abstract: Disclosed as a polyether compound having ether groups and vinyl double bonds represented by formula (I) ##STR1## and an epoxy resin represented by formula (II) ##STR2## wherein R.sup.1 represents a residue group of an organic compound having l active hydrogen atoms, n1 through nl each represents 0 or an integer of from 1 to 100, the sum of integers represented by n1 through nl is from 1 to 100, and l represents an integer of from 1 to 100, and A represents from 1 to 100, and A represents ##STR3## or a mixture of ##STR4## wherein R.sup.2 represents a residue group of mono epoxy compound, and B represents ##STR5## or a mixture of ##STR6## wherein X represents a ##STR7## group, wherein R.sup.3 represents a hydrogen atom, an alkyl group, an alkyl carbonyl group, or an arylcarbonyl group, provided that the epoxy resin represented by formula (II) contains at least one ##STR8## group: In a further aspect, the invention relates to processes for production thereof.

Abstract: Epoxy resin adhesives in which polyoxyalkylene polyamines are used as curing agents possess significantly improved initial adhesion and thermal shock resistance when mono- or bis-unsaturated cyclic imides are present, e.g. maleimides, bis-maleimides, bicycloheptene discarboximides, and bis-bicyloheptene dicarboximides.

Abstract: Monomeric, oligomeric and polymeric sulfonates are formed by the reaction of a compound containing at least one epihalohydrin residue and a sulfonate compound selected from the group consisting of phenolsulfonic acid salts, naphtholsulfonic acid salts, aminobenzene sulfonic acid salts and aminoalkyl sulfonic acid salts.

Abstract: Modified advanced epoxy resins are prepared by reacting (A) and advanced epoxy resin prepared by reacting (1) an epoxy resin having at least one aromatic ring, an average of more than one, but not more than abotu 2 vicinal epoxy groups per molecule and which contains at least one oxyalkylene or substituted oxyalkylene group per molecule; with (2) a dihydric phenol; with (B) a monoamine.

Abstract: A flock adhesive composition comprisingA. about 1 to 20% by weight of an aromatic nitroso compound;B. about 1 to 20% by weight of an epoxy resin having an epoxy equivalent of at least one; andC. about 60 to 98% by weight of a blocked isocyanate-functional urethane prepolymer, the isocyanate group or groups of said prepolymer being blocked with a blocking agent comprising a substituted or unsubstituted phenol.

Abstract: A process for producing a lactone polymer which comprises reacting an ester compound synthesized from an alcohol and an acid or acid anhydride thereof with a lactone and a ring-opening polymerization initiator without being accompanied by condensation. The thus produced lactone polymer is effective for preventing shrinkage of thermosetting resins, particularly unsaturated polyester resins.

Abstract: The invention is an epoxy resin coating composition. The composition comprises:1. a bisphenol A resin, and2. an acrylate ester, reacted with a mixture of3. a polyether polyamine of the formula:a. NH.sub.2 CH(CH.sub.3)CH.sub.2 [OCH.sub.2 CH(CH.sub.3)].sub.x NH.sub.2wherein x ranges from 2 to 6, orb. ##STR1## wherein x+y+z ranges from 4 to 6; and 4. piperazine.The weather resistant formulations cure rapidly to form attractive blemish-free, blush-free coatings.

Abstract: A master batch of hardener for curable one-package epoxy resin system which comprises (I) a hardener consisting of(I) a hardener consisting of(i) a powder of an amine compound (A) as a core having at least one tertiary amino group in the molecule while having no primary and secondary amino groups, the powder having both a group (X) capable of absorbing infrared rays of 1630 to 1680 cm.sup.-1 in wave length and a group (Y) capable of absorbing infrared rays of 1680 to 1725 cm.sup.-1 in wave length at least on the surface of the powder, and(ii) a reaction product of the amine compound (A) and an epoxy resin as a shell; and(II) an epoxy resin (B) in a ratio of 10 to 50,000 parts by weight to 100 parts by weight of the hardener (I).A hardener containing the master batch is also disclosed.

Abstract: A process is provided for producing aromatic polysulfones which contain repeating units of the formula: ##STR1## wherein each R is ortho to the sulfone, at least one R per polymer chain is an aliphatic or aromatic substituent, a heteroatom or heteroatom-containing group or a metal or metal-containing group, with any remainder thereof being hydrogen, R.sub.1 and R.sub.2 each represents alkyl or aryl, each R.sub.s is hydrogen, and n is zero or one. The process comprises:(a) metalating (e.g. lithiating) a polysulfone, preferably dissolved in a solvent, containing repeating units of the formula: ##STR2## wherein R.sub.1, R.sub.2, R.sub.s and n are as defined above, so as to form a metalated (e.g. lithiated) polymer containing repeating units of the formula: ##STR3## wherein R.sub.1, R.sub.2, R.sub.s and n are as defined above, at least one M per polymer chain is metal l(e.g. lithium), with any remainder thereof being hydrogen; and(b) Quenching the metalated (e.g.

Abstract: Poly[3,3-bis(hydroxymethyl)oxetane] ("PBHMO") is prepared in high molecular weight (n.sub.inh to 5.2) by polymerizing the trimethylsilylether of 3,3-bis(hydroxymethyl)oxetane with i-Bu.sub.3 Al-0.7 H.sub.2 O cationic catalyst at low temperature, followed by hydrolysis. PBHMO is crystalline, high melting (about 314.degree. C.), highly insoluble and useful in the production of films and fibers. Poly[3-methyl-3-(hydromethyl)oxetane] ("PMHMO") and poly[3-ethyl-3-(hydroxymethyl)oxetane] ("PEHMO") are also prepared in high molecular weight (n.sub.inh up to 3.8) by the same procedures. Copolymers of BHMO, MHMO, and EHMO with each other or containing up to about 50% of other oxethanes, oxiranes and tetrahydrofurans; derivatives and alloys from these polymers and copolymers; and methods of preparing the polymers, copolymers, alloys and derivatives into useful films, fibers and articles is described.

Abstract: Epoxy resins having improved properties are prepared by reacting an epoxy resin with a dihydric phenol in the presence of a sufficient quantity of a phosphonium catalyst such that the product resulting from reacting a mixture of the catalyst, epoxy resin and dihydric phenol has a % epoxide difference from the theoretical percent epoxide of from about 0.5 to about 4.0.