Abstract: A process for the mass coloration of linear polyesters wherein the colorant is a mixture of consisting of 0.05 to 0.35% by weight, based on the amount of polyester, of a thioindigo and/or dioxazine pigment and one or more polymer-soluble dyes which are different therefrom. Unexpectedly brilliant strong colorations of excellent lightfastness are obtained.

Abstract: A colored rigid thermoplastic resin composition is prepared by incorporating in a rigid thermoplastic resin composition a non-plasticizing liquid pigment dispersion that contains(a) 5% to 80% by weight of at least one pigment, and(b) 20% to 95% by weight of an unsaturated polyester vehicle that comprises(1) 50% to 100% by weight of an unsaturated polyester that is the product of the reaction of a dicarboxylic acid component that contains 80-90 mole percent of an unsaturated aliphatic dicarboxylic acid having 4 to 8 carbon atoms and 10-20 mole percent of a saturated aromatic dicarboxylic acid and an alcohol component that contains 40-60 mole percent of a glycol having 2 to 6 carbon atoms and 40-60 mole percent of a monohydric alcohol having 6 to 12 carbon atoms, in the amount of 0.4-0.6 mole of the dicarboxylic acid component per mole of the alcohol component, and(2) 0 to 50% by weight of an unsaturated monomer capable of reacting with the unsaturated polyester to form cross-linkages.

Abstract: Shell process foundry resin compositions containing novolak resins are improved by incorporating therein from about 0.5 to about 10 percent, based on the weight of the resin, of a finely divided, siliceous material such as fumed silica, bentonite, kaolin clay and attapulgus clay. The presence of the siliceous material provides resistance to peelback during the formation of sand shells and increases the stripping strengths of the incompletely cured molds.

Abstract: An improved process for dispersing alumina trihydrate in a polyester resin is disclosed wherein the improvement comprises lowering the viscosity of the polyester-trihydrate dispersion by dehydrating the alumina trihydrate to a reduction in the initial loss on ignition in a range of from 0.2 to 5.0 percent prior to adding the trihydrate to the polyester resin.

Abstract: Thermoplastic polyester composition containing 2-70% by weight of inorganic fillers and calcium oxide or strontium oxide for improving the melt viscosity stability of the polyester composition under melt conditions.

Abstract: A composite molded product comprising a pressure molded and cured product of(a) expanded perlite particles; and(b) a metal-modified urea-melamine-formaldehyde resin; optionally containing an inorganic or organic fiber with or without a filler, and a method for producing the same.

Abstract: This invention relates to curing of furan-formaldehyde resins with phenolic resole resins under acidic conditions, and relates to the application of this method to the formation of foundry sand shapes, for example.

Abstract: Diacids having the formulae ##STR1## wherein the radicals R, which can be the same or different, are alkylene radicals having 1 to 16 carbon atoms per radical, R' is an alkylene radical --C.sub.n H.sub.2n --, n being an integer from 0 to 15, with the further provision that there are at least 6 carbon atoms in the chain separating the two carboxyl groups --COOH, R" is hydrogen or an alkyl radical having 1 to 6 carbon atoms per molecule; X is selected from the group of phenylene, naphthylene, cyclohexylene and decahydronaphthylene, Q is selected from the group of radicals consisting of hydrogen, halogen, alkyl, dialkylamino, alkoxide, hydroxy, alkylthio, and mercapto, which are useful precursors for diesters, polyamides and polyesters. The diesters are valuable plasticizers for PVC and the polyamides not having a crystalline melting point can be spun into fibers, which in turn can be used in the textile industry for making fabrics. Also disclosed are procedures to make the novel compounds.

Abstract: Thermoplastic polyester molding compositions showing good impact resistance at both high and relatively low temperatures and containingA. 100 parts by weight of a linear saturated polyester of an aromatic dicarboxylic acid and optionally small portions of aliphatic dicarboxylic acids with saturated aliphatic or cycloaliphatic diols andB. from 1 to 25 parts by weight of a rubber-elastic graft copolymer having a glass temperature below -20.degree. C andC. optionally from 10 to 80 parts by weight of fillers.

Abstract: A composition for plugging the tap holes of blast furnaces consists essentially of about 70% to 85% of a mineral component comprising refractory clay, a granular refractory aggregate having a high mechanical strength and a high-carbon mineral material, and a polymerizable hydrocarbon binder comprising a hydrocarbon derivative derived from the distillation of crude petroleum oil and having an initial boiling point higher than 200.degree. C, a thermosetting resin which is stable at temperatures of the order of 200.degree. C and is of such composition that the beginning of the mass setting process can be adjusted from 130.degree. C up, or a combination of such hydrocarbon derivative and resin. The composition may also contain a secondary binder comprising a high-carbon material such as coal tar pitch or petroleum oil pitch which is solid at 20.degree. C, has a high coking capacity and is adapted to mix up with the polymerizable hydrocarbon binder at temperatures within the range of 130.degree. C to 200.degree.

Abstract: A method of bonding aggregates with resinous binder compositions to produce building materials of controlled strength, porosity and weight. Two types of building materials are made with this bonding method; one is a controlled strength, waterproof material, and the other is a controlled strength, porous material. The method employs either a phenolic resin binder composition in a semi-clear liquid form to maintain the natural coloration of the aggregate, or a furan resin binder composition which discolors the aggregate to a black or dark brown tone. In the controlled strength, waterproof product, the aggregate is gradated to provide a mixture of various particle sizes, including dust and fines, so that all the voids in the resulting product are filled. In the controlled strength porous product, the aggregate is gradated to provide a mixture of various particle sizes, excluding dust and fines, so voids in the product remain open, allowing moisture to pass through the product.

Abstract: A thermosettable composition suitable for preparing reinforced plastic articles is prepared by combining an unsaturated polyester, a normally solid carboxy-containing polymer of a conjugated diene, a vinyl monomer, a catalyst and a reinforcing agent or filler. Preferably the composition is prepared utilizing a mixer giving moderate shear such as a twin-rotor mixer. The resulting composition when cured exhibits high impact strength and good surface finish.

Abstract: Compositions of at least 50% by weight of a resin having repeat units of formula ##STR1## WHEREIN Ar.sup.x is a divalent or trivalent aromatic hydrocarbyl group, optionally substituted, Ar is a phenol residue, and n is 0 or 1 and up to 50% (based on the total weight of resins) of a phenol/aldehyde novolac or resole resin can be cured to form thermoset resins useful in mouldings, laminates, cements and coatings.

Abstract: Mineral filled poly(butyleneterephthalate)s are comprised of a poly(butyleneterephthalate) resin and 10 to 50 percent by weight of a novaculite mineral filler having an average particle size of less than 5 microns. Articles molded from the novaculite filled poly(butyleneterephthalate) exhibit improved impact properties over typical fillers for poly(butyleneterephthalate) resins. Impact properties can be further improved by the addition of a silane coupling agent to the poly(butyleneterephthalate) novaculite blend.

Abstract: A pencil lead comprises an extrudate of a kneaded blend of a coloring material and a novolak resin or a derivative thereof.

Abstract: Admixture of unsaturated polyester and finely ground powder particles of soda-containing silicate glass, preferably soda-lime-silicate glass, e.g. below about 40 mesh and in an amount of between about 1 to 60% based on the weight of the polyester-glass particle admixture, providing improved properties in the ultimately cured resin at lower material costs and having special application as a composition for use in fabricating fibrous glass (i.e. fiber-glass) reinforced plastics composite products.

Abstract: An unsaturated polyester resin composition containing titanium dioxide excellent in the stability of dispersion of the titanium dioxide and suitable for the manufacture of opaque, molded products comprising (1) an unsaturated polyester resin containing titanium dioxide consisting of an unsaturated polyester obtained from a high molecular weight saturated polyester containing titanium dioxide as the raw material and a copolymerizable monomer and (2) at least one compound selected from the group consisting of a hydroxyalkylamine (A) having at least one amino group and at least one hydroxyl group attached to different carbon atoms thereof, a polyoxyalkyleneamine (B), a mono- or dicarboxylate (C) derived from the compound (A) and a mono- or dicarboxylate (D) derived from the compound (B).

Abstract: Solid, rigid, filled polyurethane composites are prepared by a process comprising admixing a dried polyisocyanate component containing a degreased dust- and solid-impurity-free filler with a dry polyol, degassing said admixture until no further gas evolution occurs and effecting reaction between the polyisocyanate and polyol.

Abstract: Reaction of terephthalic acid and butane diol using a tetravalent tin catalyst having the organo-to-tin linkage.

Abstract: A friction element which has good friction stability and good braking fade resistance contains friction particles which are insoluble, infusible, and have narrow size range, and are prepared from a crosslinked thermosettable resin in liquid suspension. Also disclosed is a friction particle prepared according to the above process or according to a conventional process.