Abstract: Polymers of unsaturated acid anhydrides such as styrene/maleic anhydride copolymers can be protected from hydrocarbon attack by application of a coating of a polymer comprising pendant hydroxyl groups such as polyvinyl alcohol.

Abstract: Certain wet strength resins based on the epichlorohydrin/polyamine reaction which are characterized by extremely long gel times can be purified from epichlorohydrin residuals by azeotropic distillation.

Abstract: Rubber-modified terpolymers of from 50 to 83% of a monoalkenyl aromatic monomer, from 15 to 30% of an unsaturated dicarboxylic acid anhydride, from 2 to 20% of an unsaturated nitrile are described which are useful as molding compositions.

Abstract: Urethane compositions prepared from terpolymers of a monovinyl aromatic monomer such as styrene, a C.sub.3 -C.sub.7 allylic alcohol and an ester of a C.sub.3 -C.sub.7 allylic alcohol and a C.sub.7 -C.sub.12 monovalent aromatic acid, wherein the terpolymer preferably contains an average of from about 2 to 4 allylic alcohol units and at least one allylic ester unit per molecule.The compositions are useful as surface coatings, foundry resin binders, molding and encapsulating compounds and in the preparation of rigid and semi-rigid urethane foams.

Abstract: An electrographic recording material comprising a conductive sheet support coated with an electrically insulating layer comprising an intimate blend of a polymeric binder and up to 500 parts of an inert finely divided pigment per 100 parts by weight of polymeric binder. The binder comprises from about 40 to about 90 parts by weight of a poly(vinyl acetal) and from about 10 to about 60 parts by weight of a polystyrene or a poly(.alpha.-methylstyrene). The electrographic recording material exhibits improved toner adhesion.

Abstract: The invention relates to a continuous mass polymerization process for polyblends having a dispersed rubber phase with a bimodal rubber particle size distribution, wherein, first and second monomer-rubber solutions are fed to a first back-mixed polymerization zone such that said first solution forms particles of about 0.5 to 1.5 microns and said second solution, having present a dissolved rubber and a dissolved polymer of said monomer, forms particles of about 2 to 5 microns during partial polymerization of 10 to 50% of said monomers. Said partially polymerized solutions are further polymerized in a second zone, with linear flow, to a conversion of 20 to 95%, forming said polyblend with a bimodal rubber particle size distribution having improved toughness and gloss.

Abstract: This invention relates to a process for preparing terpolymer polyblends having low gloss in extruded profiles wherein rubber particles contained in an aqueous latex are grafted with alkenyl aromatic, alkenyl nitrile and conjugated diolefin monomers to form a grafted rubber phase dispersed in a matrix phase of said monomers, at least a portion of said rubber particles becoming associated with said terpolymers as a gel fraction in said polyblend reducing the gloss of formed polyblend articles. The invention also relates to a composition prepared by said process.

Abstract: An improved slit die for extruding thermoplastic sheet and having the capacity for fine gauge control comprises a die blade and an opposed surface in which the local separation between the two is variable by the generation of localized expansion and contraction forces in the body of the die blade while isolating the die blade lip from temperature variations by the provision of a heat barrier means.

Abstract: The process relates to a continuous mass polymerization process for ABS polyblends wherein a monomer formulation of monoalkenyl aromatic and alkenyl nitrile monomers having a conjugated diene rubber dissolved therein is continuously charged to a first, stirred reaction zone operating at a steady conversion of said monomers of about 5 to 45% forming a partially polymerized first mixture having said rubber dispersed as grafted rubber particles, followed by continuously polymerizing said first mixture in a second stirred reaction zone by substantial linear flow polymerization under evaporative cooling of said monomers to a second partially polymerized mixture containing about 50 to 90% of ABS polyblend solids and separating said solids from said second mixture as an ABS polyblend.

Abstract: Hot melt adhesive compositions comprising a block copolymer, aluminum powder, glass fiber and hollow inorganic silicate microspheres. The block copolymer is selected from the group consisting of copolyesters, copolyamides, copoly(esteramides) and copoly(ether-esters) melting at a temperature above about 150.degree. C. and having from about 30 to about 70 weight percent of hard segments and from about 70 to about 30 weight percent of soft segments. The weight ratio of block copolymer to aluminum powder, glass fiber and silicate microspheres is in the range of about 3:7 to about 3:2, the weight ratio of block copolymer to glass fiber is at least about 2:1, the weight ratio of glass fiber to aluminum powder is at least about 1:9 and wherein the volume percent of silicate microspheres is less than about 10. The compositions are particularly useful for filling voids and cavities in substrates.

Abstract: Laminates of a polyvinyl butyral sheet with a sheet comprising a copolymer of a vinylaromatic monomer with an unsaturated dicarboxylic acid anhydride have high strength and can be made optically clear. The laminates can be in part foamed to provide insulation materials or metalplated to provide tough materials that could be used for example in automotive applications.

Abstract: A polymer is described which has particular utility as an additive imparting wet an dry strength to a paper base. The polymer is formed by the reaction of a polymer of an N,N-disubstituted vinyl-benzyl amine or homologue thereof with an epihalohydrin.

Abstract: Disclosed herein is a composition and method for sizing textiles which employs as the sizing agent a mixed salt comprising the reaction product of an interpolymer with a fixed alkali base and a fugitive alkali base; the latter subsequently being volatilized away during processing of the sized textile. The interpolymer comprises (a) 1.0 molar proportion of a maleic or fumaric acid or anhydride or partial ester, (b) from 0.1 to 3.0 molar proportion of a monovinylidene aromatic monomer and (c) from zero to a finite molar proportion of an alpha-olefin, a vinyl ester, alpha-beta-ethylenically unsaturated nitrile, an acrylic or methacrylic ester or a vinyl alkyl ether. From 10 to 70% of the free carboxyl groups of the interpolymer are combined with fixed base, i.e., non-valatile amine or alkali metal base, and from 5 to 90% of said free carboxyl groups are combined with fugitive base, i.e., ammonia, ammonium hydroxide or volatile amine.

Abstract: A doctor blade holder is described that is adapted to accommodate a doctor blade in a slot in the holder and is provided with a resilient means at the base of the slot such that a blade accommodated within the slot is able to move into and out of the slot in response to variations in pressure against the doctoring edge of the doctor blade.

Abstract: A resole resin composition suitable for use as a component of a binder comprises a water-soluble resole resin and an accelerator which is a C.sub.1 to C.sub.4 alkyl partial ester of an aromatic polycarboxylic acid.

Abstract: Coating compositions comprising intimate blends of a polyvinyl acetal, an alkoxymethyl polyaminotriazine and an oligomeric polystyrene or poly(.alpha.-methylstyrene). The coating compositions may contain up to 500 parts by weight of an inert non-photoconductive pigment per 100 parts by weight of polymer blend. The compositions are useful for the preparation of electrographic recording media which possess improved resistance to curl under variable conditions of humidity.

Abstract: Coating compositions comprising intimate blends of a poly(vinyl acetal) and a low molecular weight polystyrene or poly(.alpha.-methylstyrene). The coating compositions may contain up to 500 parts by weight of an inert non-photoconductive pigment per 100 parts by weight of polymer blend. The compositions are useful for the preparation of electrographic recording media which possess improved toner adhesion.

Abstract: The invention relates to a foamable polymeric polyblend of a matrix copolymer of alkenyl aromatic/alkenyl nitrile monomers having dispersed therein (1) a grafted diene rubber being grafted with said monomers and (2) an alkyl half ester of a styrene/maleic anhydride copolymer. The composition is foamed by the thermal decomposition of said half ester. The foamed polyblend has great utility as a structural foam with said composition providing fast molding cycles and fine cell structure. A method for foaming said polyblend is disclosed.

Abstract: Pressure sensitive adhesives having improved color, cohesive strength and tack (are) obtained by reacting an acrylic interpolymer containing hydroxyl or carboxyl groups with a poly(metaloxane), poly(alkoxytitanoxanes) being particularly preferred.

Abstract: The invention provides a stable polymeric additive useful for improving the wet strength of a cellulosic substrate. The additive is a water-soluble cationic thermosetting polymer incorporating a plurality of extralinear glycidyl quaternary ammonium groups. The invention also comprises a method of making such an additive.