Abstract: A high temperature PVC resin blend is made by blending from 60 to 85 parts PVC with no more than 40 parts of a ("alpha-SAN") copolymer of alpha-methyl styrene ("AMS"), styrene ("S") and acrylonitrile ("AN"), and less than 20 parts by wt additives including stabilizers, antioxidants, lubricants, and processing aids. In addition, an impact modifier may be added. The blend with particularly sized glass fibers, may be thermoformed at an elevated processing temperature and pressure, to provide a reinforced composite in which the PVC is covalently bonded to the glass fiber. The composite has a substantially higher HDT and equivalent tensile strength, compared to that of a similarly reinforced, unblended PVC composite, without sacrificing the novel composite's other desirable physical properties.

Abstract: A flexible magnetic blend composition is provided which is comprised of high energy ferrite magnetic particles in a flexible high temperature resistant and oil resistant polymer binder. The binder system is preferably a highly saturated nitrile rubber (HSN) or a polymer alloy of the same in which a HSN is the major polymer containing alloying polymers and/or additives which are compatible with processing, subsequent electron beam curing, and final product performance. The binder system is highly loaded usually from 55 to 65 volume percent with the high energy ferrite particles, i.e., barium and/or strontium ferrite particles, which can produce bonded magnets with a maximum energy product of at least 1.0 megagauss-oersteds, a remenance, Br, of at least 2000 gauss, a coercive force, H.sub.c, of at least 1800 oersteds, and an intrinsic coercivity, H.sub.ci, of at least 2000 oersteds.

Abstract: Polymeric blends of thermoplastic polyurethane elastomers and crystalline or predominately crystalline polyolefin thermoplastics are produced by high shear mixing of melts of the respective polymers. The stabilized mechanically compatible blend of the ordinarily thermodynamically incompatible polymers comprises from about 3.5 to 20 parts by weight of a polyolefin homopolymer or copolymer with 100 parts by weight of polyurethane. The mechanically compatible polymeric blend is particularly useful for molding plastic articles by injection molding, extrusion, calendering or similar process for molding thermoplastic articles.

Abstract: Oxidation of particles of rare earth magnetic materials is greatly reduced when a passivating agent such as an oxidation resistant composition or corrosion inhibitor or combinations thereof, is coated thereon. The oxidation resistant composition is a binary or a ternary composition made from (a) at least one amino containing silane compound such as an aminosilane or a polyaminosilane, or (b) at least one epoxy resin, or (c) an epoxy silane compound, or all three such compounds. The oxidation resistant composition, the corrosion inhibitor, or combinations thereof, passivate the surface of the magnetic particles and generally form a highly concentrated coating on the surface thereof. Antidegradants are optionally utilized to improve the performance of the rare earth magnet composition with regard to improved oxidation resistant properties and generally include organic phosphorous compounds and/or alcohols.

Abstract: Impact resistant properties, especially at low temperatures, melt processing properties, and dimensional stability of thermoplastic elastomer polyurethanes are improved by the addition of a carbonyl modified polyolefin. These improvements are particularly useful for reinforced polyurethanes.

Abstract: Command-cure compositions especially for use in insulated window assemblies permit the composition to be rendered adhesively bonding at a selected time interval after formation of the assembly to firmly bond opposed surfaces of the assembly; a particular adhesive in strip or tape form comprises an adhesive polymer composition which is transparent to curing radiation especially UV, and curable in the presence of the radiation; the curing is inhibited by oxygen; the composition is solvent free and cures to a mass resistant to water; surfaces of the adhesive exposed to oxygen remain tacky and uncured; the adhesive is especially useful in window structures in which adhesion of the tacky surface excludes the cure-inhibiting oxygen and the tacky surface can be cured by UV radiation passing through the window glass.

Abstract: Polyurethane sealant and coating compositions made from blocked isocyanate-terminated prepolymers have improved shelf stability when an effective amount of a carbodiimide is utilized therewith. Such compositions and coating materials can be stored in sealed containers or cartridges for relatively long periods of time, for example in excess of five or six months, without significant loss of curability which adversely affects physical properties upon cure. One part as well as two part polyurethane sealant and coating compositions are stabilized by the addition of the carbodiimide stabilizing agent whereas the addition of an organosilane abates viscosity increase during storage.

Abstract: A polyurethane sealant composition is made from a polyurethane prepolymer having blocked isocyanate groups. A bicyclic amidine catalyst is utilized in association with an amine curing agent having at least two primary amine groups to achieve a relatively fast cure time. In the first embodiment, the catalyst is 1,8-diazobicyclo (5:4:0) undecene-7 (DBU), whereas in a second embodiment the catalyst is 1,5-diazobicyclo (4:3:0) non-5-ene (DBN).

Abstract: A talc reinforcing agent is presented for use with a crosslinkable silicone polymer system which has improved sag and modulus properties. The talc reinforcing agent can be used in one and two-part silicone sealant systems. The reinforcing agent results in improved non-sag characteristics without the use of fumed silica.

Abstract: A urethane sealant or coating composition is made from a physical blend of a polypropyleneoxide polyol intermediate and an organic-silicone block copolymer based polyol intermediate. The urethane prepolymer is made by reacting the physical intermediate blend with a polyisocyanate and preferably blocking the same with blocking agents such as phenols to prevent reaction with moisture in the air. Cure is effected through the utilization of curing agents such as polyamines or polyimines, for example, diamines, amine terminated polyethers, ketimines, aldimines, and the like. The sealant composition can contain various fillers, organosilanes, and the like. The prepolymers of the present invention generally have improved elongation and reduced modulus. Either a one-part or a two-part system can be utilized.

Abstract: A concrete and masonry waterproofing composition comprises a major amount of a polyurethane and a minor amount of a penetrant. The polyurethane is desirably made from a polyether polyol or a polyester polyol intermediate, wherein the polyol is a diol or a triol. Such intermediates are reacted with a polyisocyanate. Cure, that is, chain extension occurs upon contact with moisture in the air. The penetrant is an organosilane having the formula: ##STR1## where R.sup.1 is an aliphatic having from 1 to 18 carbon atoms and wherein R.sup.2, R.sup.3, and R.sup.4, independently, is an alkyl having from 1 to 6 carbon atoms, or an organosiloxane having the formula: ##STR2## wherein R.sup.7 is an aliphatic having from 1 to 18 carbon atoms and R.sup.5 and R.sup.6, independently, is an alkyl having from 1 to 6 carbon atoms, and wherein n is 2 to 20.

Abstract: Composite laminates having improved delamination resistance and useful for aircraft, marinecraft, automobiles, armor, and furniture are formed from plies of substrate which include fibers extending generally normal to the plane of the substrate. These plies of substrate can be, for example, tufted textiles wherein the tufts are formed by the fibers extending in the "z" direction. The fibers interlock with or are anchored in the substrate. Fibers from one ply intermesh with the fibers of an opposing ply. An organic binder sandwiched between the plies is cured to form the composite matrix. A method of making the laminates comprises applying the uncured binder to a tufted substrate to form a ply, stacking the plies, and applying heat and pressure to transform the binder to a matrix which substantially saturates the plies.

Abstract: Polycarbonates are blended with an impact modifier to improve the impact resistance thereof. The impact modifier is a multiple phase polymer system prepared by subsequent multiple stage polymerizations. The first phase which constitutes from about 50 percent to about 90 percent by weight of the multiple phase impact modifier is generally an elastomer such as an alkyl acrylate wherein the alkyl portion has from 2 to 18 carbon atoms. The second phase polymer is generally a plastic type compound such as a vinyl substituted aromatic, an alkyl methacrylate, or an alkenyl nitrile compound. The impact modifiers are made without utilizing any crosslinking or grafting agents and thus are substantially free of any such bonds and are generally free-flowing powders.

Abstract: An oxidation of rare earth magnetic materials and powders thereof are greatly reduced when coated with a binary or a ternary composition made from (a) at least one amino containing silane compound such as an aminosilane or a polyaminosilane, (b) at least one epoxy resin or (c) an epoxysilane compound. The composition is utilized to coat rare earth magnets or magnet materials or in association with a binder to form a matrix substantially encapsulating the same.

Abstract: At least three, and as many as eighteen, most preferably at least nine, crosslinking sites are provided through the alkoxy groups in multiple chains on a triazine ring (hence "multisilane"), on a single molecule of the multisilane. The multisilane, useful as a coupling agent, is formed by reacting a triazine-containing compound with a suitable aminoalkyl-alkoxysilane, or, alkyl-aminoalkyl-alkoxysilane in either an anhydrous, or an aqueous liquid medium. A size containing the multisilane, enhances the reinforced properties of organic synthetic resinous materials in which the fibers are used, and most particularly those of rigid poly(vinyl chloride) (PVC) with which it provides cohesive bonding of glass fiber surfaces.

Abstract: Polyarylene polyethers ("PAPE") with vinyl chain ends may be crosslinked to form networks with excellent physical and chemical properties except they tend to be brittle. In particular, a polysulfone ("PSU" made from bisphenol A and dichlorodiphenyl sulfone) with vinylbenzyl chain ends ("di-VB-PSU") is too brittle for many applications where impact resistance is essential. This brittleness is combatted by inserting a thermally stable rubbery poly(dimethylsiloxane) ("PDMS") segment having a number average molecular weight in the range from about 600 to about 5000 connected to di-VB-PSU segments by hydrosilylation in the presence of a Pt catalyst, to form a thermoplastic linear predominantly triblock oligomer with vinylbenzyl chain ends which are thermally crosslinkable.

Abstract: Oxidation of rare earth magnetic materials and powders thereof are greatly reduced when coated with a binary or a ternary composition made from (a) at least one amino containing silane compound such as an aminosilane or a polyaminosilane, or (b) at least one epoxy resin, or (c) an epoxy silane compound. The composition is utilized to coat rare earth magnet or magnet materials or in association with a binder to form a matrix substantially encapsulating the same.

Abstract: A high temperature PVC resin blend is made by blending from 60 to 85 parts PVC with no more than 40 parts of a ("alpha-SAN") copolymer of alpha-methyl styrene ("AMS"), styrene ("S") and acrylonitrile ("AN") and less than 20 parts by wt additives including stabilizers, antioxidants, lubricants, and processing aids. In addition, an impact modifier may be added. The blend with particularly sized glass fibers, may be thermoformed at an elevated processing temperature and pressure, to provide a reinforced composite in which the PVC is covalently bonded to the glass fiber. The composite has a substantially higher HDT and equivalent tensile strength, compared to that of a similarly reinforced, unblended PVC composite, without sacrificing the novel composite's other desirable physical properties.

Abstract: Various chemolithotrophic bacteria such as Thiobacillus ferrooxidans by direct or indirect mechanisms catalyze the oxidation of metal sulfides and produce acid, i.e. sulfuric acid and soluble metal salts at a much faster rate than chemical oxidation. Elimination of such bacteria would inhibit the formation of the acid. The natural production of such acids is particularly troublesome in mines e.g. coal mines, since acid water is produced which is damaging to the environment. An effective method of abating or eliminating such acid water production is to apply a bactericide such as a biodegradable organic surfactant which at low pH values are bactericides and hence inhibit the bacteria from catalyzing the metal sulfides. The affected acid water site can thus be treated with the surfactant which provides a temporary or short term result usually for a few months.

Abstract: The perforations in a film-faced wound dressing have been discovered to have edges which, though clearly defined, lack the ability to cut the neoepithelium of a healing wound, with the result that the film affords an unexpectedly high degree of comfort during movement of the patient- and most particularly, when the dressing is changed. This occurs in a thin, soft, self-supporting elastomeric film, such as a polyether polyurethane (PPU) film, having less than 10% crystallinity. The film provides a degree of conformability not attained heretofore; has a softness and elastomeric quality which results in reduced shear associated with the edges of its perforations as compared with the sharp cutting edges of perforations in plastic film; has excellent releaase characteristics enhanced by less than 25% open area (due to perforations) which minimizes the open area into which the neoepithelium may grow.