Abstract: A carboxylated polymer latex containing a minor amount by weight of a heat sensitizer sufficient to gel the polymer and which also can contain fillers, wetting agents and stabilizers can be used to provide a water resistant film on the surface of a with rubber compound or composition which subsequently can be cooled rapidly wiht water and dried. The resulting latex coated rubber can then be stacked or assembled without sticking.

Abstract: A method of producing an extrudate using a roller die is disclosed in which on-line adjustments are made to size and shape deviations by changing the rotational speed of the extruder screw, the feed rate to the extruder, or the speed of the take-away device and the rotational speed of the roller die. The size and shape dimensions of the extrudate are measured and used to calculate new values for the screw or take-away speed of the feed rate and the roller die speed. A measurement of the extrudate dimensions may also be obtained at the roller die to provide a faster response.

Abstract: Divinyl benzene and/or diisopropenyl benzene in hydrocarbon solvent is added over a period of time at low temperature to a hydrocarbon solvent containing a C.sub.2-20 normal, secondary or tertiary alkyl or cycloalkyl lithium compound and a tertiary alkylamine having 2-4 carbon atoms prepared at low temperature to provide an initiator having an average of from 4 to 9 C-Li sites and a VPO Mn of from about 750 to 4,000. These initiators a re useful in polymerizing dienes and vinyl monomers to provide star polymers having an average of from about 4 to 9 arms or branches. These star polymers among other things are useful low profile or low shrink additives for FRPs, e.g., glass fiber reinforced plastics.

Abstract: A method of producing an extrudate is disclosed in which on-line adjustments are made to size and shape deviations by varying the temperature conditions in the extruder and by varying the relative speeds along the extrusion line. The temperature conditions can be adjusted by varying the temperature of the stock while maintaining a fixed relationship of the die temperature to the stock temperature to produce deviations in the thickness of the extrudate with respect to the width of the extrudate, and by varying the temperature of the die with respect to the temperature in the stock to produce variations in different thicknesses of the extrudate. The relative speeds along the extrusion line can be varied by changing the speed of the screw in a cold-feed extruder, by changing the feed rate for a hot-feed extruder, or by changing the speed of the take-away device which regulates the speed by which the extrudate is taken away from the extruder.

Abstract: A pattern is produced on the polymeric frothed coating on a substrate by reciprocating a rake through the froth on the substrate as the froth carried by the substrate moves under the rake. After curing and drying there is provided a substrate having an adherent resilient sponge or cellular pattern.

Abstract: Vinylchloride resins such as polyvinylchloride, copolymers of vinylchloride and vinyl acetate and copolymers of vinylchloride and vinylidene chloride are dehydrochlorinated in water at 150.degree. to 180.degree. C. to provide a dehydrochlorinated vinylchloride resin which can be graft copolymerized with one or more copolymerizable monomers containing polymerizable ethylenically unsaturated double bonds. Grafted copolymers in which the grafting monomer is butyl acrylate and the like provide an internally plasticized vinylchloride resin.

Abstract: Tires made using polyester cord in the fabric plies are built in a conventional manner, cured in a conventional manner in a curing press, removed from the curing press and held in an uninflated state for a length of time sufficient for the tire to cool to 300.degree. F. (149.degree. C.), then post inflated. The tires remain in the inflated state until the temperature has been reduced below 90.degree. C. The cords in the tires which have been subjected to the post inflation treatment of the present invention have less tendency for sidewall waviness than tire which have been post inflated out of the mold immediately after curing and without being subjected to cooling water in the bladder. Also the cooling period outside the mold has been found to be as successful in solving the sidewall waviness problem as the injection of cooling water into the bladder for 2 minutes at the end of the cure cycle.

Abstract: Polyamides from lactams are prepared by the reaction of an initiator compound, a liquid hydroxy containing nitrile copolymer and a lactam using as a catalyst a minor amount of a lactam anionic polymerization catalyst. The resulting polyamides exhibit high impact strength and improved dimensional stability or reduced sensitivity to dimensional change upon exposure to a high humidity environment.

Abstract: An FRP molding can be in-mold coated using a free radical peroxide initiated thermosetting composition of at least one polymerizable epoxy based oligomer having at least two acrylate groups, at least one copolymerizable ethylenically unsaturated monomer, at least one copolymerizable monoethylenically unsaturated compound having a --CO-- group and a --NH.sub.2, --NH-- and/or --OH group, polyvinyl acetate, at least one zinc salt of a fatty acid having at least 10 carbon atoms, at least one accelerator for a peroxide initiator, conductive carbon black, a filler such as talc and a copolymerizable or cocurable compound selected from the group consisting of(I) at least one polyoxyalkylene glycol oligomer having two acrylate groups and(II) at least one polyurethane oligomer having two acrylate groups and mixtures of (I) and (II).Optionally and desirably, there additionally can be added to the foregoing composition at least one calcium salt of a fatty acid.

Abstract: Surface defects in a cured, molded thermoset fiberglass reinforced (FRP) part can be repaired by filling the defect or void with an excess of a thermosetting conductive repair material, applying pressure and heat sufficient to cure said material without substantial shrinkage of said material, removing the pressure, cooling and finishing said parts to the original surface contour.

Abstract: An aqueous alkaline dispersion of a rubbery graft or over polymerized copolymer of a diene and a vinyl pyridine on a polyacrylate seed (core or substrate), said acrylate polymer having a Tg of not above about -20.degree. C., desirably also containing a polybutadiene, and a water soluble, heat reactable phenolic resin, in certain amounts is useful in forming an adhesive for bonding glass fiber reinforcing elements or cords to rubber compounds or stocks. After dipping the glass fiber cord in the one-step adhesive dip, the coated cord is heated to dry it and heat cure or heat set the adhesive on the cord. Thereafter, the adhesive containing glass fiber cord is combined or laminated (calendered) with a curable rubber compound and the resulting assembly is cured to form a composite in which the glass fiber cord is bonded to the rubber by means of said adhesive.

Abstract: An aramid reinforcing element or cord is dipped in an aqueous adhesive composition of a phenolic-aldehyde resin and a vinyl pyridine latex and dried. The treatment is repeated again and preferably for three times. The repeatedly treated cord is then cured with a rubber compound to give improved H-adhesion values. If desired, a primer treatment with an epoxide may proceed the aqueous adhesive composition treatments.

Abstract: Divinyl benzene and/or diisopropenyl benzene in hydrocarbon solvent is added over a period of time at low temperature to a hydrocarbon solvent containing a C.sub.2-20 normal, secondary or tertiary alkyl or cycloalkyl lithium compound and a tertiary alkylamine having 2-4 carbon atoms prepared at low temperature to provide an initiator having an average of from 4 to 9 C-Li sites and a VPO Mn of from about 750 to 4,000. These initiators are useful in polymerizing dienes and vinyl monomers to provide star polymers having an average of from about 4 to 9 arms or branches. These star polymers among other things are useful low profile or low shrink additives of FRPs, e.g., glass fiber reinforced plastics.

Abstract: An apparatus useful in repairing molded thermoset FRP parts is disclosed having means for applying heat and pressure to a defect in the FRP containing a repair material while the FRP part is substantially rigidly held on a nest or support.

Abstract: An aqueous alkaline dispersion of a rubbery graft or over polymerized copolymer of a diene and a vinyl pyridine on a polyacrylate seed (core or substrate), said acrylate polymer having a Tg of not above about -20.degree. C., desirably also containing a polybutadiene, and a water soluble, heat reactable phenolic resin, in certain amounts is useful in forming an adhesive for bonding glass fiber reinforcing elements or cords to rubber compounds or stocks. After dipping the glass fiber cord in the one-step adhesive dip, the coated cord is heated to dry it and heat cure or heat set the adhesive on the cord. Thereafter, the adhesive containing glass fiber cord is combined or laminated (calendered) with a curable rubber compound and the resulting assembly is cured to form a composite in which the glass fiber cord is bonded to the rubber by means of said adhesive.

Abstract: An apparatus and a method for feeding an elongated strip onto a tire component building drum are especially adapted for applying breaker strips to giant radial tire breaker building drums. The apparatus includes a carriage with roller means for conveying the strip that is mounted on the same side of the building drum as the operator stands while applying the strip to the drum. The carriage is movable on a track on a frame mounted on a floor on which the operator stands, and the track and frame extend upwardly from the floor and are preferably slanted toward the drum. A roll of strip to be applied to the drum is contained in a roll support means near where the frame is mounted on the floor, and the strip is unwound from the roll and passed over rollers on the carriage and onto the drum. By moving the carriage on the track, the position of the carriage can be adjusted to the position that is best, in the judgment of the operator, for applying the strip to the drum.

Abstract: By varying the temperature and/or the flow rate of water passing through rubber mill rolls and measuring the stock temperature of the rubber being milled, the optimum flow rate and water temperature to be used in cooling the mill can be obtained. The desired stock temperature range is predetermined by a compounding chemist and the optimum flow rate and water temperature is determined by the energy costs involved in running the mill.

Abstract: A latch assembly for holding one end of a hold-down strap of a hopper car hatch cover uses a counterweighted latching member that can be raised to an overcenter unlocked position when the end of the hold-down strap is to be lifted. In the locked position, the latch assembly can act as a hinge for one end of the hold-down strap while the other end of the strap is raised.

Abstract: Salt is recovered in a molten state from wash water used to wash extruded rubber parts. The parts, before washing, are coated with salt because they are cured in a molten salt bath. The molten salt recovered from the wash water was fed back into the carrying tank, thus eliminating salt loss and temperature change of the tank's molten salt content.

Abstract: A puncture sealant package for incorporation into a pneumatic tire is formed by coextruding a puncture sealant, and a skin forming material. The ribs are formed in an initially circular package profile as chords. After flow in a sheet die, the chords form divider ribs making small angles with the encapulating skin. The compartments formed by the ribs prevent flow of the sealant toward the center of a tire.