Microporous sheet product and methods of making and using the same. In one embodiment, the microporous sheet product is made by a process that includes melt-extruding a sheet material using an extrusion mixture that includes a thermoplastic polymer, a non-cross-linked elastomer having a molecular weight of at least 50,000 Da, and a compatibilizing agent. By way of example, the thermoplastic polymer may be a polyolefin, the non-cross-linked elastomer may be a polyisobutylene, and the compatibilizing agent may be mineral spirits. After extrusion, the sheet material may be cooled, and the sheet material may be stretched. The microporous sheet product may be used, for example, as a battery separator, as a food packaging material, as a diffusion barrier in the ultrafiltration of colloidal matter, and in disposable garments.

A process for epoxidation of an unsaturated polymer involves mixing an unsaturated polymer and a peroxy acid in an absence of solvent to produce an epoxidized polymer. The process may require no solvent, require no catalyst, require no or little applied external heat input, require no applied cooling, require less epoxidation agent, be faster and/or result in more efficient conversion of the unsaturated polymer.

A foamed thermoplastic material includes a thermoplastic material exhibiting, in its unfoamed state, a particular flammability index, flame growth rate, and specific extinction area. The foamed thermoplastic material further includes a plurality of cells having a number average mean diameter of 5 to 150 micrometers present in an amount effective to provide the foamed thermoplastic material with a density that is 10 to 90 percent of the density of the unfoamed thermoplastic material. The foamed thermoplastic material exhibits a desirable tensile elongation and dielectric constant. A process for forming the foamed thermoplastic material, articles including the foamed thermoplastic material, and an article-forming process are also described.

A semiaromatic copolyamide resin and a polyamide molding composition consisting of the same are provided, consisting of following repeat units: (A) 26-80 mol % of units derived from para-amino benzoic acid; (B) 4-70 mol % of units derived from 11-aminoundecanoic acid or undecanolactam, and 0-70 mol % of units derived from another amino acids having 6 to 36 carbon atoms or units consisting of a lactam having 6-36 carbon atoms; (C) 0-37 mol % of units derived from a diamine unit having 4 to 36 carbon atoms; and (D) 0-37 mol % of units derived from a diacid unit having 6 to 36 carbon atoms; wherein, (A)+(B)+(C)+(D)=100 mol %; and molar contents of the units derived from para-amino benzoic acid and those derived from 11-aminoundecanoic acid or undecanolactam are not equal to 50 mol % simultaneously.

There is disclosed an elastomeric styrenic block copolymer (SBC) composition comprising one or more SBCs and one or more polymers miscible with styrenic end blocks of the one or more SBCs; wherein said block copolymer composition is both physically and chemically crosslinked; wherein said chemical crosslinking comprises covalent bonds between chains of SBC and; wherein said physical crosslinking comprises non-covalent interaction between styrenic end blocks of the one or more SBCs and the one or more polymers miscible with the styrenic end blocks.

Also disclosed is a miscible polymer blend comprising one or more SBCs and one or more polymers miscible with styrenic end blocks of the one or more SBCs; wherein said miscible polymer blend is both physically and chemically crosslinked; wherein said chemical crosslinking comprises covalent bonds between chains of SBC and; wherein said physical crosslinking comprises non-covalent interaction between styrenic end blocks of the one or more SBCs and the one or more polymers miscible with the styrenic end blocks.

The herein disclosed unique compositions or blends comprising physically and chemically cross-linked styrene block copolymers find use in, for example, the manufacture of thin-walled dipped articles such as condoms or gloves. The unique compositions or blends overcome the shortcoming of chemical resistance in presently available SBCs while maintaining a high level of mechanical resistance and flexibility.

A composition including a melt blend of at least one thermoplastic elastomer (TPE) and at least one non-crosslinked elastomer and optionally at least one catalyst for catalyzing chain extension and/or crosslinking and/or coupling reactions of the at least one non-crosslinked elastomer. Further, a method for producing a polymer composition, to a shaped article including a substrate layer composed of the composition, to a method producing a shaped article, and to a method for covering a roof using the shaped articles.

Provided is a structure having excellent flexibility represented by elastic restoring from compression or tensile elongation at break, and excellent lightness. A structure according to the present invention includes reinforced fibers, first plastic, and second plastic that exhibits rubber elasticity at room temperature, the reinforced fibers being discontinuous fibers, and the first plastic and/or the second plastic coating a crossing point between the reinforced fibers in contact with each other.

A free standing film is provide, including: a partially hydrolyzed polyvinyl acetate; a poly(ethylene oxide); a polyalkylene glycol; a plasticizer; optionally, a poly(isobutylene-co-maleic anhydride) copolymer; and optionally an optional additive. Unit dose packages including the free standing film are also provided.

Painting in commercial, residential, and retail environments requires extreme care to avoid paint being deposited where it is not required. Drop cloths are commonly used to protect a floor or furniture during the painting process. However, these are generally simply plastic sheets to provide a barrier to the liquid paint and nothing more. Accordingly, it would be advantageous to provide a drop sheet or tarp that supports a liquid material drying process such as by dehydration, coagulate, etc. or form solid materials thereby reducing the instances of subsequent paint transfer from the drop sheet or tarp directly or indirectly to other surfaces and/or objects. It would also be advantageous to drop sheet or tarp that provides a non-slip surface which prevents the drop sheet from sliding around and remains well in place without additional weights, tape, etc.

In one aspect, the present disclosure provides a polymer film with a low glass transition temperature. In one embodiment, when in contact with a metal substrate, the polymer film adheres to the metal substrate under heating and/or mechanical pressure. In one embodiment, the polymer film comprises a butadiene copolymer and a butylene polymer. In another aspect, the present disclosure further provides a method of masking a metal substrate using the polymer film. In yet another aspect, the present disclosure provides a method of chemically or electrochemically processing a metal substrate that is masked with the polymer film.