A method of making an acid neutralizing polymer includes: a) preparing a first reaction mixture by blending of a polyamide material, a solid strongly basic material, and a halogenated-dimethylalkylamine; b) adding the first reaction mixture to a first compounding machine; c) reacting the first reaction mixture for a time and at a temperature sufficient to produce a first reaction product; d) preparing a second reaction mixture including the polyamide material; e) adding the second reaction mixture to a second compounding machine; f) reacting the second reaction mixture for a time and at a temperature sufficient to produce a second reaction product; g) preparing a third reaction mixture by blending the first reaction mixture and the second reaction mixture; h) adding the third reaction mixture to a third compounding machine; and i) reacting the third reaction mixture for a time and at a temperature sufficient to produce the acid neutralizing polymer.

The present invention relates to a powder of spherical crosslinkable polyamide particles, which is suitable for the selective laser sintering (SLS) technique, and also to a process for obtaining such a powder of spherical crosslinkable polyamide particles. The present invention also relates to the production of articles by SLS, followed by a crosslinking step, using said powder of spherical crosslinkable polyamide particles.

The present disclosure relates to the provision of novel biodegradable amphiphilic peptides and peptide analogues based derivatives comprising hydrophobic chains and their use in the permeabilization of mammalian cells and delivery of agents, for example therapeutic agents, imaging agents and cell preservation agents.

The present disclosure relates to the provision of novel biodegradable amphiphilic peptides and peptide analogues based derivatives comprising hydrophobic chains and their use in the permeabilization of mammalian cells and delivery of agents, for example therapeutic agents, imaging agents and cell preservation agents.

The present invention discloses an aramid-based epoxy resin and a method of making same, including the steps of reacting aramid fiber powder as a raw material with a metallization reagent; grafting a plurality of ethylene oxide, propylene oxide or a mixture thereof to an activated amide group of the aramid to introduce a reactive functional group hydroxyl; and then conducting a ring-opening and closing reaction by using epichlorohydrin to obtain a liquid aramid-based epoxy resin.

A terminal-modified polyamide 4 having improved thermal stability is provided. The terminal-modified polyamide 4 consists of a polyamide 4-derived site (A) and a polyalkylenimine-derived site (B), and has a structure in which a polyalkylenimine is amide-bonded to a polymerization terminal of polyamide 4. The weight ratio between the polyamide 4-derived site (A) and the polyalkylenimine-derived site (B) is 100:0.01-100:20. The polyamide 4-derived site (A) is a site derived from polyamide 4 having a number average molecular weight (Mn) of 1,000 to 2,000,000, and the polyalkylenimine-derived site (B) is a site derived from a polyalkylenimine having a number average molecular weight (Mn) of 400 to 100,000.

A terminal-modified polyamide 4 having improved thermal stability is provided. The terminal-modified polyamide 4 consists of a polyamide 4-derived site (A) and a polyalkylenimine-derived site (B), and has a structure in which a polyalkylenimine is amide-bonded to a polymerization terminal of polyamide 4. The weight ratio between the polyamide 4-derived site (A) and the polyalkylenimine-derived site (B) is 100:0.01-100:20. The polyamide 4-derived site (A) is a site derived from polyamide 4 having a number average molecular weight (Mn) of 1,000 to 2,000,000, and the polyalkylenimine-derived site (B) is a site derived from a polyalkylenimine having a number average molecular weight (Mn) of 400 to 100,000.

The present disclosure relates to compositions and compounded compositions including polyamide and a maleated polyolefin, articles formed from the same such as extruded or molded articles, and methods of making the compositions and articles. A composition includes a condensation polyamide that is at least 30 wt % of the composition and that is the predominant polyamide in the composition. The composition also includes from ≥10 wt % to ≤50 wt % of a maleic anhydride grafted polyolefin having a grafted maleic anhydride incorporation of ≥0.05 to ≤1.5 wt % based on total weight of the maleated polyolefin.

The present disclosure provides fibers and filaments formed from polyamide polymers polymerized with dual termination of the amino and carboxyl end-groups, referred to herein as dual-terminated polyamides, or dual terminated PA. In one embodiment, the dual-terminated polyamide is considered “highly terminated” and is useful in producing stain resistant textiles such as carpet fibers, for example.

The present disclosure provides fibers and filaments formed from polyamide polymers polymerized with dual termination of the amino and carboxyl end-groups, referred to herein as dual-terminated polyamides, or dual terminated PA. In one embodiment, the dual-terminated polyamide is considered “highly terminated” and is useful in producing stain resistant textiles such as carpet fibers, for example.