Abstract:
The present invention provides a macroporous copolymer having large pores, typically in the range of 5,000-200,000 Å and a typical breaking weight of at least 175 g/bead. The macroporous copolymers can be made using an interpenetrating polymer network (IPN) techniques. These macroporous copolymers may also form macroporous resins. The present invention also provides methods of using the macroporous copolymers and resins.
Abstract:
The present invention discloses a foam sheet and its production process comprising the formation of a plurality of independent cells and/or a plurality of continuous cells. The foam sheet is produced from a foamable composition that contains an acid generator that generates an acid or a base generator that generates a base due to the action of an active energy beam and a compound that has a decomposing foarmable functional group that decomposes and eliminates one or more types of low boiling point volatile substances by reacting with the acid or base.
Abstract:
Methods of preparing porous optical materials are provided. These methods allow for the selection of the desired pore size and level of porosity in the porous optical material. Such methods utilize a preformed polymeric porogen.
Abstract:
Ordered, monodisperse macroporous polymers, their corresponding ordered, monodisperse colloids, and methods of preparing them are disclosed. The methods use an ordered, monodisperse colloidal template to define the polymer pore morphology, which in turn acts as a mold for the growth of a new ordered, monodisperse colloid. The macroporous polymer may be prepared with either spherical or ellipsoidal pores from a wide variety of polymeric systems. The new ordered, monodisperse colloid may be grown from a wide variety of materials including ceramics, semiconductors, metals and polymers. These materials are potentially useful in optical, micro-filtering and drug delivery applications.
Abstract:
The present invention relates to polyalkylene oxide porogens having hyper-branches and low dielectric-constant insulators using them. More particularly, the present invention relates to polyalkylene oxide porogens having hyper-branches expressed by the following formula (1), where the polyalkylene oxide porogen has a center molecular (D) having branches (W), and low dielectric-constant insulators having nanopores prepared by coating a mixture of the porogen and a high heat-resistant resin such as polysilsesquioxane and thermal treating the coated substrate at a temperature effective to degrade the porogen. DY—W)l (1)
Abstract:
The invention provides new light absorbing crosslinking compositions suitable for use as an antireflective composition, particularly for deep UV applications. The antireflective compositions of the invention comprise a photoacid generator that is activated during exposure of an overcoated photoresist. Antireflective compositions of the invention can significantly reduce undesired footing of an overcoated resist relief image.
Abstract:
A low-k organic dielectric material having stable nano-sized porous is provided as well as a method of fabricating the same. The porous low-k organic dielectric material is made from a composition of matter having a vitrification temperature (Tv-comp) which includes a b-staged thermosetting resin having a vitrification temperate (Tv-resin), a pore generating material, and a reactive additive. The reactive additive lowers Tv-comp below Tv-resin.
Abstract:
A medical prosthesis includes a body having a silicone skin and a silicone foam body core. The skin and foam body core are both resilient. The core includes a plurality of voids and a plurality of discontinuities. Some of the discontinuities communicate with more than one void.
Abstract:
A foam material is provided that is formed from a body of silicone having a cellular structure formed by a plurality of interconnected voids. The voids have a relatively high volume of between about 0.06545 to about 268.0832 mm3 and more typically about 65.45 to about 179.5948 mm3. The foam material displays unique tactile properties.
Abstract:
A process for the preparation of a porous composite product. The process steps are forming a homogeneous mixture having one or more insoluble polymers, one or more soluble or calcinable polymers and one or more fillers, in particular with a high specific surface; extruding the mixture to form an extruded precursor product; removing the soluble or calcinable polymer or polymers from the extruded precursor product, in order to form pores, and recovering the porous composite product.