Abstract:
Multilayer polymeric films which may be useful for protecting the leading edges of aircraft from rain and sand erosion are presented. Typical surface protection films comprising two or more layers of a first material alternating with one or more layers of a second material, wherein the first and second materials are different materials, wherein the first and second materials comprise first and second polymers, wherein the first and second materials have a first and second Shore hardness, and wherein the first Shore hardness is greater than the second Shore hardness by more than 5A or more typically more than 10A.
Abstract:
A dispensing system for liquid materials comprising a container, a dispensing assembly, a cap member, and base material. The container defines a primary opening, a secondary opening, and a product chamber. The dispensing assembly is selectively attached to the container to cover the primary opening. The cap member is selectively attached to the container to cover the secondary opening. The base material is introduced into the product chamber through the secondary opening. The base material is dispensed from the product chamber through the primary opening using the dispensing assembly.
Abstract:
Various methods of treating surface-modified nanoparticles are described. Dual-ion exchange procedures (anion exchange and cation exchange), as well-as subsequent end-capping are described. Both ionically-bonded and covalently-bonded end-capping agents are discussed. The resulting low ion content, particularly low alkali metal and alkaline metal oxide ion content, treated, surface-modified nanoparticles, including such nanoparticles in a resin system, are also disclosed. Effects of low ion content on various properties of the resulting resin system, including blister-resistance, optical clarity, and rheology are included.
Abstract:
Nitric oxide releasing compositions, which comprise nanoparticles having an exterior surface comprising solid amorphous silica, the exterior surface having nitrosothiol-containing groups attached thereto, the nanoparticles being dispersible in an aqueous system, devices including the compositions, and methods of making and using the compositions and devices are disclosed.
Abstract:
There are provided curable resin sols having a curable polycyanate ester resin and at least 30 weight percent of an essentially volatile-free, colloidal dispersion of substantially spherical surface-modified silica nanoparticles; wherein the curable resin sol comprises no greater than 200 parts per million by weight alkali metal and alkaline earth metal ions based on the total weight of the silica nanoparticles and curable polycyanate ester resin. There are also provided compositions comprising such curable resin sol and reinforcing fibers, a process for preparing such compositions, and various articles made using such curable resin sols and compositions.
Abstract:
Nanoparticle compositions including calcite and a surface-modifying agent bonded to the calcite are described. The surface-modifying agent includes a binding group bonded to the calcite and a compatiblizing segment. The compatiblizing segment includes at least one of a polyethylene oxide, a polypropylene oxide, a polyester, a polyamide, or a combination thereof. The composition includes less than 2 wt.% solvents and/or resins. Methods of preparing nanoparticle compositions are also described.
Abstract:
Compositions comprising surface-modified nanocalcite particles dispersed in a curable resin system comprising a vinyl ester, and coatings and fibrous composites incorporating such compositions are described. The surface-modifying agents include a binding group ionically associated with the calcite and a compatiblizing segment, compatible with the curable resin. The surface-modifying agent may also include a reactive group capable of reacting with the curable resin system. Methods of preparing nanocalcite composites and coating a fibrous composites prepared from such nanocalcite composites are also described.
Abstract:
Methods of compounding nanoparticles with a resin, e.g., a curable resin and one or more surface modifying agents are described. The methods use wet milling technology, including both continuous and batch milling processes, and can be used to functionalize the nanoparticles and disperse the functionalized nanoparticles into the resin system in a single process. Methods of compounding curable resin systems containing reactive diluents are also disclosed.
Abstract:
Compositions comprising surface-modified nanocalcite particles dispersed in a curable resin, and to coatings and fibrous composites incorporating such compositions are described. The surface-modifying agents include a binding group ionically associated with the calcite and a compatiblizing segment, compatible with the curable resin. The surface-modifying agent may also include a reactive group capable of reacting with the curable resin. Methods of preparing nanocalcite composites and coating a fibrous composites prepared from such nanocalcite composites are also described.
Abstract:
Various methods of treating surface-modified nanoparticles are described. Dual-ion exchange procedures (anion exchange and cation exchange), as well-as subsequent end-capping are described. Both ionically-bonded and covalently-bonded end-capping agents are discussed. The resulting low ion content, particularly low alkali metal and alkaline metal oxide ion content, treated, surface-modified nanoparticles, including such nanoparticles in a resin system, are also disclosed. Effects of low ion content on various properties of the resulting resin system, including blister-resistance, optical clarity, and rheology are included.