In one aspect, methods of depolymerization are described herein comprising providing a synthetic polymer including a hydroxylated aliphatic backbone or hydroxylated backbone segments, and homolytically activing OH bonds of the hydroxyl groups. Homolytic activation induces the formation of alkoxy radical intermediates followed by CC bond ?-scission events breaking the polymer backbone into depolymerization products. In some embodiments, depolymerization products comprise alkyl radical intermediates reduced by hydrogen atom transfer. Moreover, in some embodiments, the depolymerization products are further reacted into difunctionalized products or comprise functionalities derived from the polymer structure. The difunctionalized products can subsequently be employed in polymerization processes for the production of additional synthetic polymers.

A resin composition having all of higher pigment colorability, low-temperature impact resistance, and flame retardance is provided. A graft copolymer is a polyorganosiloxane-containing graft copolymer formed by polymerizing one or more grafting vinyl monomers (b) in the presence of a rubber (A) containing polyorganosiloxane and a vinyl polymer, wherein the index of refraction of the rubber (A) is in the range of 1.47 to 1.56, and the volume-average particle size is in the range of 300 nm to 2000 nm. A resin composition contains the graft copolymer and a resin.

The invention relates provides synthetic medical adhesives which exploit plant derivatives to form covalent bonds with amines and thiols on tissue surfaces.

The invention relates provides synthetic medical adhesives which exploit plant derivatives to form covalent bonds with amines and thiols on tissue surfaces.

Particles may be produced that comprise an unsaturated polyamide and an initiator. Said particles may be used in additive manufacturing methods that comprise: depositing the particles optionally in combination with other thermoplastic polymer particles upon a surface; and once deposited, heating at least a portion of the particles to promote consolidation thereof and crosslinking of the unsaturated polyamide, thereby forming a consolidated body comprising a crosslinked polyamide.

The present invention relates to novel, melt-processable polyimides that shows a high glass transition temperature, a process for preparing these polyimides and also the use of the new polyimides

The present invention is a polyamide resin composition containing 50 to 90% by mass of a crystalline polyamide resin (A) and 9 to 49% by mass of a talc (B), and preferably further containing a coupling agent (C) and a fatty acid metal salt (D), in which an average particle size of secondary particles of the talc (B) in the polyamide resin composition is greater than 30 ?m. The polyamide resin composition is less likely to cause a poor appearance of a molded article or occurrence of sink marks, and can stably provide characteristics within desired ranges.

The present invention is a polyamide resin composition containing 50 to 90% by mass of a crystalline polyamide resin (A) and 9 to 49% by mass of a talc (B), and preferably further containing a coupling agent (C) and a fatty acid metal salt (D), in which an average particle size of secondary particles of the talc (B) in the polyamide resin composition is greater than 30 ?m. The polyamide resin composition is less likely to cause a poor appearance of a molded article or occurrence of sink marks, and can stably provide characteristics within desired ranges.

The present invention relates to a compound obtained by a process comprising the following steps: (i) Reacting at least one isocyanate containing compound, in stoichiometric excess, with at least one isocyanate-reactive compound having a number average molecular weight equal to or higher than 400, resulting in the formation of at least one prepolymer having soft blocks and hard blocks in its structure, which prepolymer contains unreacted isocyanate monomer, (ii) Reacting said at least one prepolymer with a hydroxyl-ester compound or a hydroxyl-acid compound with the formation of hydroxyl-ester terminated prepolymer or hydroxyl-acid terminated prepolymer, and Ring-closing said hydroxyl-ester terminated prepolymer or hydroxyl-acid terminated prepolymer; (iii) Formation of said compound made of oxazolidinedione-terminated prepolymer and oxazolidinedione-terminated monomer, which is soluble in said oxazolidinedione-terminated prepolymer.

Provided is a process for producing a part made of a thermoplastic composite material by molding in a closed mold, where the material includes reinforcing fibers and a polyamide thermoplastic matrix impregnating the fibers. Also provided is a reactive prepolymer precursor composition for use in the process.