A liquid formulation for addition to a polymeric material comprises a vehicle, an additive (e.g. a colourant) and carbonyl bis (1-caprolactan)). The liquid formulation may be used to colour melt spun fibre (e.g. PET or polyamide).

Provided are high temperature, low scorch, including no scorch, which is defined herein, methods of making crosslinkable compound compositions, the method comprising melt compounding a primary stream at a temperature of from 120.0? to 150.0? C., wherein the primary stream comprises one or more thermoplastic polyolefins and one or more antioxidants, but lacks curative additives selected from the group consisting of: peroxides and crosslinking coagents; and injecting into the compounded melt a combination of curative additives comprising one or more organic peroxides and one or more crosslinking coagents, and homogeneously mixing the one or more thermoplastic polyolefins, one or more antioxidants, one or more organic peroxides, and one or more crosslinking coagents by melt compounding them together. Also provided are methods of making crosslinked compound compositions and manufactured articles.

Additives such as colourants may be incorporated into polymeric materials such as polyesters, such as in polyester fibre production, by use of a liquid formulation comprising colourant and a vehicle. The vehicle may comprise a functionalised pentaerythritol, trimethylolpropane or trimellitate. The liquid formulation is suitably contacted with the polymeric material in a melt processing apparatus.

The invention pertains to a process for manufacturing a fluoropolymer hybrid organic/inorganic composite comprising: (i) partially hydrolyzing and/or polycondensing, in the presence of an aqueous medium, a metal compound of formula (I): X4-mAYim, wherein X is a hydrocarbon group, Y is a hydrolysable group selected from the group consisting of an alkoxy group, an acyloxy group and a hydroxyl group, A is a metal selected from the group consisting of Si, Ti and Zr, and m is an integer from 1 to 4, so as to obtain an aqueous medium comprising a pre-gelled metal compound comprising one or more inorganic domains consisting of A-O-A bonds and one or more residual hydrolysable groups Y [compound (M)], and then (ii) reacting in the molten state at least a fraction of hydroxyl groups of a functional fluoropolymer [polymer (F)] with at least a fraction of hydrolysable groups Y of said pre-gelled metal compound [compound (M)], so as to obtain a fluoropolymer hybrid organic/inorganic composite. The invention also pertains to uses of said fluoropolymer hybrid organic/inorganic composite in several applications.

Additives such as colorants may be incorporated into polymeric materials such as polyesters, such as in polyester fiber production, by use of a liquid formulation comprising colorant and a vehicle. The vehicle may comprise a functionalized pentaerythritol, trimethylolpropane or trimellitate. The liquid formulation is suitably contacted with the polymeric material in a melt processing apparatus.

Various embodiments disclosed relate to melt-stabilized materials including ultra high molecular weight polyethylene (UHMWPE), methods of making the same, and medical implants including the same. In various embodiments, the present invention provides a method of melt-stabilizing a material including UHMWPE. The method includes obtaining or providing a solid material including UHMWPE including a first concentration of free-radicals. The method includes coating at least part of the solid material with a liquid composition including at least one antioxidant, to provide a coated solid material. The method includes heating the coated solid material in an environment including oxygen, the heating being sufficient to melt at least part of the UHMWPE, to provide a heated material. The method also includes solidifying the heated material, to provide a melt-stabilized material including UHMWPE including a second concentration of free-radicals, wherein the second concentration of free-radicals is less than the first concentration of free-radicals.

The invention concerns a polymer composition for making a bone anchoring part of an orthopedic implant for use in repair of damaged cartilage tissue, comprising a biostable thermoplastic polyurethane and 15-70 mass % of micron-sized inorganic particles comprising a biocompatible transition metal compound. It was found that the relatively rigid TPU composition comprising said inorganic particles allows making an anchoring part that can be inserted or press-fitted into a pre-drilled bone hole to form a firm and durable connection to bone tissue, and which may be visualized with for example X-ray or MRI methods. The polymer composition shows favorable properties and enables freedom in designing and making the implant with common techniques like injection molding. In other aspects, the invention relates to methods of making said polymer composition, and to using the polymer composition in making an orthopedic implant comprising a bone anchoring part, like in forming the implant with a multi-component injection molding process comprising a step of molding the bone anchoring part from the polymer composition.

For the production of polymers in which there are fillers with particle sizes below 10 m incorporated and homogeneously distributed, a polymer starting material is input into a twin-screw extruder and is melted there to give a melt. In a conveying and mixing section, a suspension, which is formed of the fillers and of a carrier liquid, is injected into the melt. The melt viscosity is reduced by injection of the carrier liquid in the conveying and mixing section in that a cleavable polycondensate is used as polymer and low-molecular-weight cleavage product arising during the polycondensation is used as carrier liquid, and therefore the molten polymer is at least to some extent depolymerized within the conveying and mixing section. That the mixture, which is formed of the melt whose viscosity is reduced by cleavage, of the remainder of the carrier liquid and of the fillers, is homogenized.

The present disclosure provides a process. The process includes (i) providing a post-consumer recycled polypropylene (PCR-PP) having a melt flow rate (MFR I.sub.2) equal to, or greater than, 7.0 g/10 min; (ii) adding a 4,4-oxydibenzenesulfonyl azide (DPO-BSA) to the PCR-PP; (iii) melt blending the PCR-PP with the DPO-BSA; and (iv) forming a DPO-BSA coupled PCR-PP having a melt flow rate (MFR I.sub.2) equal to, or less than, 5 g/10 min.