An antifouling coating composition including a copolymer including two or more moieties represented by Chemical Formula 1, and a linking group between the two or more moieties, a method of preparing the copolymer, and an antifouling film produced from the antifouling coating composition. ##STR00001## In Chemical Formula 1, the definitions of Ar, A, B, C, D, and m are as described in the specification.

An antifouling coating composition including a copolymer including two or more moieties represented by Chemical Formula 1, and a linking group between the two or more moieties, a method of preparing the copolymer, and an antifouling film produced from the antifouling coating composition.

##STR00001##

In Chemical Formula 1, the definitions of Ar, A, B, C, D, and m are as described in the specification.

An example of a bottlebrush polymer has a polymer backbone and a plurality of individual brush moieties bonded to the polymer backbone. The individual brush moieties include a ketone, a hydrophilic segment, and a surface adhesive terminal group. The brush moieties can be functionalized and/or cross-linked.

The present disclosure relates to an adjuvant composition comprising lecithin; and, an organosilicon surfactant of formula (I):
R.sup.1Si(CH.sub.3).sub.2Z(I)
wherein: R.sup.1 is a branched monovalent hydrocarbon group of from 5 to 8 carbon atoms containing at least two methyl groups; Z is R.sup.2 or R.sup.3; R.sup.2 is CH.sub.2CH.sub.2CH.sub.2OC.sub.2H.sub.4O).sub.a(C.sub.3H.sub.6O).sub.b(C.sub.4H.sub.8O).sub.cR.sup.4 in which R.sup.4 is hydrogen, a linear or branched monovalent hydrocarbon group of from 1 to about 4 carbon atoms or an acyl group, subscript a is from 1 to about 20, subscript b is from 0 to about 19, subscript c is from 0 to about 19 and the sum of subscripts a, b and c is from 1 to about 20; and, R.sup.3 is CH.sub.2CH.sub.2CH.sub.2OCH(OH)CH.sub.2N.sup.+(CH.sub.3).sub.2R.sup.5 [X.sup.] in which R.sup.5 is a linear or branched hydrocarbon group of from 1 to about 4 carbon atoms or an acetyl group and X.sup. is a saturated or unsaturated carboxylate anion of from 2 to about 22 carbon atoms optionally containing 1 or 2 hydroxyl groups.

An example of a bottlebrush polymer has a polymer backbone and a plurality of individual brush moieties bonded to the polymer backbone. The individual brush moieties respectively including a ketone, a hydrophilic segment, and a surface adhesive terminal group. The brush moieties can be functionalized and/or cross-linked.

A rigid foam including the reaction product of an (poly)isocyanate, and a polyethercarbonate polyol copolymer is described. The polyethercarbonate polyol copolymer is derived from the copolymerisation of one or more epoxides with CO2, wherein the total-CO2 content of the polyethercarbonate polyol copolymer is between 1 and 40 wt %, the carbonate linkages are <95% of the total linkages from the copolymerisation, and the molecular weight is between 100 to 5000 g/mol. The foam is a polyurethane foam, more typically, a polyisocyanurate or a mixed polyisocyanurate/polyurethane foam. Methods, polyols and compositions for producing the foams are also described.

A phenylene ether oligomer composition is disclosed comprising, a phenylene ether oligomer having an external amine content of less than or equal to 1.5 weight percent; and a residual solvent in an amount of 10 to 10000 parts per million by weight, based on the weight of the phenylene ether oligomer composition; wherein the phenylene ether oligomer composition has an intrinsic viscosity of 0.03 to 0.13 deciliter per gram; a glass transition temperature of 135 to 175 C., or a combination thereof

A method for isolating a phenylene ether oligomer composition includes feeding a solution including a solvent and a phenylene ether oligomer into a thin film evaporator, forming a film on an interior surface of the thin film evaporator, and heating to devolatilize the solvent from the film, to provide a phenylene ether oligomer composition. The thin film evaporator includes cylindrical heating chamber and a rotor having one or more rotor blades, wherein an edge of the one or more rotor blades and the interior surface of the cylindrical heating chamber are separated by a distance of 0.5 to 3.5 millimeters. Phenylene ether oligomer compositions are also described.

A capped bisphenol polyether oligomer including a reactive end group, wherein the capped bisphenol polyether oligomer further includes a repeating unit derived from: a bisphenol monomer, a benzylic dihalide, a tertiary cycloalkyl dihalide, or a combination thereof; and optionally, the capped bisphenol polyether oligomer further includes a branching agent.

An example of a bottlebrush polymer has a polymer backbone and a plurality of individual brush moieties bonded to the polymer backbone. The individual brush moieties include a ketone, a hydrophilic segment, and a surface adhesive terminal group. The brush moieties can be functionalized and/or cross-linked.