Abstract: High-impact poly(styrene) resins modified with small-particle-size, multi-stage impact modifiers having a crosslinked poly(butadiene) core and a poly(styrene) or other vinylaromatic polymer shell show an improved balance of impact strength, stiffness and surface gloss, and an improved resistance to environmental stress crazing, when compared to conventional high-impact poly(styrene).

Abstract: A melt calendered sheet and a process for making melt calendered sheet having excellent transparency and solvent craze resistance. Clear melt calendered sheet having a critical stress rating above 12,000 KPa, heat distortion temperature above 85.degree. C., and flexural modulus above 3,275 MPa is produced from acrylic copolymer having a melt flow rate of from about 0.3 to about 1.3 grams/10 minutes.

Abstract: The invention provides a continuous process for producing a pure grade of acrylic acid having residual aldehyde levels under 10 parts per million. The process applies two groups of amines sequentially and continuously in selectively reducing acrolein and furfural and may be advantageously conducted in the presence of maleic acid and maleic anhydride impurities.

Abstract: A tetravalent organotin containing compound where the tin atom is attached via an alkyl group to a phenyl moiety with a polymerizable group thereon, is useful as a monomer. A polymer prepared from the monomer. A transesterification catalyst prepared from the polymer and a process for conducting a transesterification reaction using the transesterification catalyst.

Abstract: A melt calendered sheet and a process for making melt calendered sheet having excellent transparency and solvent craze resistance. Clear melt calendered sheet having a critical stress rating above 12,000 KPa, heat distortion temperature above 85.degree. C., and flexural modulus above 3,275 MPa is produced from acrylic copolymer having a melt flow rate of from about 0.3 to about 1.3 grams/10 minutes.

Abstract: The invention relates to thermoplastic polyurethane blends containing at least one thermoplastic polyurethane and at least one copolymer, the copolymer derived from at least 5 weight percent of an N-vinyl lactam monomer unit. Blends of the invention generally are compatible or miscible, and many exhibit clarity and other physical properties, such as tensile modulus, distortion resistance and impact resistance, which are improved over the properties of the thermoplastic polyurethane component of the blend or of thermoplastic polyurethanes blends in the art.

Abstract: A process for the preparation of an .alpha.,.beta.-unsaturated C.sub.3 -C.sub.6 carboxylic acid of greater than 98% purity, which combines fractional distillation and melt crystallization procedures.

Abstract: This invention is a method for removing certain carbonyl containing impurities from .alpha.,.beta.-unsaturated carboxylic acid ester with an aqueous solution of a bisulfite or dithionite salt.

Abstract: A tetravalent organotin containing compound where the tin atom is attached via an alkyl group to a phenyl moiety with a polymerizable group thereon, is useful as a monomer. A polymer prepared from the monomer. A transesterification catalyst prepared from the polymer and a process for conducting a transesterification reaction using the transesterification catalyst.

Abstract: Process for cured composites and flexible light pipe, in which a molten cladding polymer and a crosslinkable core mixture are coaxially extruded through a coextrusion die, the cladding is filled with the crosslinkable core mixture, and the crosslinkable core mixture is cured within the cladding.

Abstract: Polymers of (N-lower alkyl)dimethylglytarimide or (N-hydrogen)-dimethylglutarimide are resistant to molecular weight degradation and yellowing on exposure to heat and ultraviolet or visible light by inclusion of a hindered piperazinone stabilizer.

Abstract: A method for preparing a plastic composite by feedblock coextrusion of a molten acrylic based capstock overlying and integrally bonded to an underlying structural plastic ply. The composition of the capstock contains from about 40 to about 88 wt. % of an acrylic polymer having a molecular weight of at least about 125,000 daltons, and from about 12 to about 60 wt. % of an acrylate-based impact modifier resin in the form of discrete multi-layered polymeric particles. The capstock composition has a melt flow index of about 0.4 to about 0.75 grams/10 minutes (ASTM Method D-1238, Condition I) and the underlying structural ply has substantially the same melt flow index as that of the capstock composition.

Abstract: The invention is directed to clear polymer blends of acrylic/vinyl aromatic copolymers with certain core-shell polymer impact modifiers. The core-shell modifiers have lightly crosslinked, predominantly diolefinic rubbery cores and one or more hard shells.

Abstract: The invention is directed to stabilizer compositions, to polymers containing these stabilizer compositions for use as additives in polymeric matrices, and to polymeric products which contain these additives. The stabilizer compositions comprise a ternary composition of a sterically hindered phenol, a less sterically hindered phenol, and an organic phosphite. These compositions are admixed with polymers to provide polymeric additives to improve the physical and mechanical properties of polymeric matrices.

Abstract: The invention is directed to stabilizer compositions, to polymers containing three stabilizer compositions for use as additives in polymers, and to polymeric products which contain these additives. The stabilizer compositions comprise a compositon of: a) at least two hindered phenols and b) a sulfide. These compositions are admixed with polymers to provide polymeric additives to improve the physical and mechanical properties of polymers matrices.