Abstract:
The invention provides novel compositions of hydroxyapatite and block copolymers, methods of their preparation, and uses thereof, wherein the co-polymers have degradable hydrophobic blocks and hydrophilic blocks for stable interfacing with hydroxyapatite, resulting in stable polymer-hydroxyapatite suspensions. The super- hydrophilicity, strengthened mechanical integrity, and retained structural integrity of the HA- PELA composite in aqueous environment represent major advantages over the HA-PLA composites for skeletal tissue engineering applications.
Abstract:
Described are aqueous gel compositions for forming a fragrance-containing gels, comprising a gel network blend, comprising a) methylcellulose, hydroxypropyl methylcellulose, carboxymethylcellulose, or mixtures thereof, and b) alginic acid, alginates, or mixtures thereof, in a weight ratio ratio of from 1:8 to 8:1; from 1 to 40 wt.% of a fragrance oil; and from 0.01 to 10 wt.% of a salt, thereby cross-linking the alginic acid, alginates, or mixtures thereof; provided that fragrance-containing gel is heat resistant up to 50°C.
Abstract:
Polyester compositions comprising: a) at least one semi-aromatic polyester resin; b) at least one reinforcing agent; c) hydroxyapatite; d) at least one epoxy component having two or more epoxy functional groups per molecule of the epoxy component; and optionally, at least one toughener, wherein the compositions exhibit the combined property of a desirable melt viscosity stability and a desirable hydrolysis resistance to articles molded from the compositions. Articles molded or extruded from these compositions especially, electric and electronic components. Methods of maintaining melt viscosity stability of a melt-mixed composition while simultaneously retaining tensile strength in the article prepared from the melt-mixed composition.
Abstract:
The present invention relates to bioabsorbable polymer composite materials, which contain a polymer matrix component composition including one or more multimonomer-polymers and one or more biocompatible additives, as well as a process for their manufacture. Further, the invention relates to surgical devices, such as pins, screws, plates, tacks, bolts, intramedullary nails, suture anchors, wedges, wires, filaments, sutures or staples, containing said composite, and a process for their manufacture.