The present invention provides a fluorine-containing ether compound represented by following formula.

R.sup.1CH.sub.2R.sup.2CH.sub.2R.sup.3CH.sub.2R.sup.4CH.sub.2R.sup.5CH.sub.2R.sup.6CH.sub.2R.sup.7

(R.sup.2, R.sup.4, and R.sup.6 are perfluoropolyether chains having the structure R.sup.3 and R.sup.5 are each independently a linking group containing one or more hydroxyl groups, and R.sup.1 and R.sup.7 are each independently Formula (2).)

OCH.sub.2CH(OH)([D]CH(OH)).sub.s-[E]-CH.sub.2OH(2)

(s is 0 or 1, [D] and [E] each independently is a chain structure consisting of a combination of 2 to 5 methylene groups and 1 oxygen atom or a chain structure consisting of 1 to 4 methylene groups, provided that, in case where s is 0 and [E] contains an oxygen atom, the number of methy ne groups contained in [E] is 3 or more).

A solid surface sheet includes visible, elongated, shredded cuttings uniformly distributed throughout a matrix wherein the cuttings and the matrix have substantially the same specific weight and wherein a majority of the cuttings are substantially elongated. Related methods are also disclosed including shredding a first mix while in a gel state, curing the cuttings, sorting by size, and using as a filler in a base material to form a blend having a unique appearance and high internal strength. The preferred material is polyester or acrylic. The solid surface sheet can be used as a countertop, floor or wall panel, furniture, and in similar applications.

The present invention provides new classes of phenol compounds, including those derived from tyrosol and analogues, useful as monomers for preparation of biocompatible polymers, and biocompatible polymers prepared from these monomeric phenol compounds, including novel biodegradable and/or bioresorbable polymers. These biocompatible polymers or polymer compositions with enhanced bioresorbabilty and processibility are useful in a variety of medical applications, such as in medical devices and controlled-release therapeutic formulations. The invention also provides methods for preparing these monomeric phenol compounds and biocompatible polymers.

The present invention provides new classes of phenol compounds, including those derived from tyrosol and analogues, useful as monomers for preparation of biocompatible polymers, and biocompatible polymers prepared from these monomeric phenol compounds, including novel biodegradable and/or bioresorbable polymers. These biocompatible polymers or polymer compositions with enhanced bioresorbabilty and processibility are useful in a variety of medical applications, such as in medical devices and controlled-release therapeutic formulations. The invention also provides methods for preparing these monomeric phenol compounds and biocompatible polymers.

Certain embodiments are directed to cyanate resin blends comprising, for example, a mixture of a cyanate monomer and a cyanate oligomer. The resin blends are effective to provide a dielectric constant of less than 2.7, a glass transition temperature of at least 150 C. and a moisture absorption of less than 1.5%. Radomes using the resin are also described.

Certain embodiments are directed to cyanate resin blends comprising, for example, a mixture of a cyanate monomer and a cyanate oligomer. The resin blends are effective to provide a dielectric constant of less than 2.7, a glass transition temperature of at least 150 C. and a moisture absorption of less than 1.5%. Radomes using the resin are also described.

An aromatic polyketone including, in a structural unit, at least one alicyclic skeleton and at least one carbon atom bound by two rotatable single bonds, or an aromatic polyketone including a structural unit represented by the following Formula (1), the following Formula (2), or the following Formula (4), and a structural unit represented by the following Formula (5) is provided.

##STR00001##

An aromatic polyketone including, in a structural unit, at least one alicyclic skeleton and at least one carbon atom bound by two rotatable single bonds, or an aromatic polyketone including a structural unit represented by the following Formula (1), the following Formula (2), or the following Formula (4), and a structural unit represented by the following Formula (5) is provided.

##STR00001##

Polymer nonwoven nanoweb containing ionic functional group and respiratory mask including the same are provided. The polymeric nonwoven web comprises polymer fibers having a diameter in the nanometer range and having a polymer with an ionic functional group in its main chain or side chain. The ionic functional group may be a sulfonate group, an ammonium group, an azanide group, a phosphonate group, a phosphate group, or a zwitterion group having two of these ionic functional groups linked. The polymeric nonwoven web may further comprise a counter ion having a charge of opposite sign to the charge of the ionic functional group, such as Ag.sup.+ or I.sup..

Polymer nonwoven nanoweb containing ionic functional group and respiratory mask including the same are provided. The polymeric nonwoven web comprises polymer fibers having a diameter in the nanometer range and having a polymer with an ionic functional group in its main chain or side chain. The ionic functional group may be a sulfonate group, an ammonium group, an azanide group, a phosphonate group, a phosphate group, or a zwitterion group having two of these ionic functional groups linked. The polymeric nonwoven web may further comprise a counter ion having a charge of opposite sign to the charge of the ionic functional group, such as Ag.sup.+ or I.sup..