Abstract: The invention relates to an improved process for the mass polymerization of solutions comprising monoalkenyl aromatic monomers and optionally monoalkenyl nitrile monomers having a diene rubber dissolved therein wherein the improvement comprises dissolving a minor amount of an organic diperoxide compound in said solution and mass polymerizing said solution, said diperoxide initiating a higher molecular weight polymer fraction providing said polymer with a broader molecular weight distribution.

Abstract: The invention relates to an improved process for the mass polymerization of solutions comprising monoalkenyl aromatic monomers and optionally monoalkenyl nitrile monomers having a diene rubber dissolved therein wherein the improvement comprises dissolving a minor amount of an aliphatic mono-olefinic compound in said solution and mass polymerizing said solution, said olefinic compound forming free radicals with said monoalkenyl aromatic monomer that are more active than said monoalkenyl aromatic free radicals in grafting said rubber provided a higher grafted rubber phase.

Abstract: A system for controlling the percent of polymer in a reactor in a process in which the reactor effluent, comprising a mixture of polymer, unreacted materials and, possibly, by-products, goes through a separator to remove from such effluent unreacted materials and by-products. The system is especially useful with variable fillage, horizontal continuous stirred tank reactors.

Abstract: The elongation at fail and toughness of rubber reinforced polystyrene and ABS type polymeric polyblends are improved without loss of tensile strength by the addition of a liquid polymer of a conjugated diene monomer having a molecular weight of from about 1,000 to 10,000. The liquid polymers may be incorporated during any stage of the process for preparing the polymeric polyblend.

Abstract: This invention relates to a method for preparing improved monoalkenyl aromatic polyblends having a dispersed rubber phase as rubber particles having a bimodal particle size distribution and compositions thereof.

Abstract: This invention relates to a moldable foamed polymer composition that can be molded at relatively low ambient temperatures and pressures. The moldable composition comprises a wax and particles of a foamed polymer, the wax being present in an amount capable of bonding the particles together in a coherent body. A method for forming articles from said composition along with processes for using said molded articles are also disclosed.

Abstract: This invention relates to an improved polymeric polyblend characterized by a blend of (A) a polymer of at least one monoalkenyl aromatic monomer having dispersed therein an amount sufficient to toughen said polyblend of a (B) diene rubber, said rubber being dispersed as crosslinked grafted rubber particles wherein said improvement comprises (C) said diene rubber being a particular polybutadiene rubber having a broad molecular weight range providing the polyblend with greatly improved impact strength.

Abstract: This invention relates to high ortho etherified resole resins. The resole resins are prepared by reacting under acidic conditions phenol with formaldehyde in the presence of a divalent electropositive metal. The resole resins are then etherified with an alcohol and dehydrated to less than 1 percent water. The novel high ortho etherified resole resins are useful in coating, bonding and adhesive compositions. Such resoles are readily curable with coreactive resins providing chemical and solvent resistance.

Abstract: The invention relates to a resin binder composition comprising, in combination, a resole resin and a metal salt curing accelerator providing a binder composition that has an improved cure rate in electrical grade laminates without adversely affecting electrical properties. The binder composition provides low viscosity for impregnation and accelerated curing rates for advancing the impregnated substrate prior to laminating and final curing.

Abstract: The process relates to polymerizing mixtures of diene rubber with a monomer formulation comprising monovinylidene aromatic and ethylene unsaturated nitrile monomers wherein a late add of monovinylidene aromatic monomer is added after 85 to 98% conversion of the monomer formulation providing high nitrile ABS polyblends having improved color and toughness.

Abstract: This invention relates to high ortho etherified resole resins. The resole resins are prepared by reacting under acidic conditions phenol with formaldehyde in the presence of a divalent electropositive metal. The resole resins are then etherified with an alcohol and dehydrated to less than 1 percent water. The novel high ortho etherified resole resins are useful in coating, bonding and adhesive compositions. Such resoles are readily curable with coreactive resins providing chemical and solvent resistance.

Abstract: The present invention relates to compositions of matter which are especially useful as beneficiating agents in the production of well drilling muds. These compositions comprise mixtures of carboxylic acid polymers and metal salts which mixtures are water soluble at a pH of less than 7.0 wherein the metal is selected from Groups IB, IIB, VIB, VIIB and VIII of the Periodic Table and lead.

Abstract: This invention relates to a process for recovering graft copolymer solids from a latex wherein a portion of said solids are separated as a fines-fraction and recycled to said latex for incorporation in said solids particles, hence, substantially reducing the fines-fraction of said solids enabling efficient drying of said solids particles.

Abstract: The polyblend comprises a matrix terpolymer of monovinylidene aromatic, ethylenically unsaturated nitrile and acrylate monomers blended with a graft copolymer having superstrate polymers of monovinylidene aromatic and ethylenically unsaturated monomers on a substrate of a diene rubber.

Abstract: The invention relates to an improved process for preparing high ortho novolac resins, said process including reacting phenol and formaldehyde in the presence of a divalent electropositive metal oxide, hydroxide or organic salt wherein the improvement comprises conducting said reaction with said catalysts in combination with a divalent electropositive metal salt selected from the group consisting of sulfonates and fluoroborates or acids selected from the group consisting of sulfonic and fluoroboric or mixtures thereof.

Abstract: The invention relates to a binder composition comprising a low molecular weight resole resin in combination with boron compounds wherein said boron compounds are present in from about 1 to 30 parts per 100 parts by resole resin solids, said composition having a pH of about 2-6 and said resole having a viscosity of from about 5 to 5000 cps. Said binder provides laminates having superior electrical and flame retardant properties.

Abstract: A mixing apparatus for continuously coagulating the polymer of an aqueous latex and consolidating as a paste coagulum comprising a barrel, a rotor positioned therein and being coaxial therewith, said rotor having attached opposed rows of forward angled tab blades and opposed wiping blades axially aligned therewith, said barrel having first and second feed ports at a first end section and a discharge port at the second end section thereof, a closure means and a journal means attached to said rotor at the feed section thereof, the relationship between the elements of said apparatus being such that during operation of said apparatus, said paste coagulum can output from said discharge port when said latex is input to said first port means and a coagulant is input to said second port means.

Abstract: The present invention relates to a composite sheet member having a plurality of coextruded laminar layers comprising a base layer having at least one exterior layer, said base layer being formed from a first polyblend of low grafted rubber content and said exterior layers being formed from a second polyblend having a higher grafted rubber content, said composite sheet having increased impact strength when impacted with a force through the base layer to the exterior layer.

Abstract: The present invention relates to a brake lining composition comprising friction particles and a resin binder therefor, said friction particles being a thermoset reaction product of an amine modified novolac resin and an aromatic polycarboxylic compound having improved thermal stability. The invention also relates to a method for preparing said brake lining composition.

Abstract: The present invention relates to a fusible polymeric alloy composition comprising (A) a matrix interpolymer, (B) a grafted diene rubber, (C) a polymer other than (A) or (B) having a solubility parameter in the range of 8.5 to 13 and (D) an inorganic filler. Said alloy having low thermal expansion, high modulus and toughness yet unexpectedly superior processing and molding properties for highly filled alloys.