Abstract: A multi-part water-borne coating composition is provided. The multi-part composition includes water, a first part, and a second part. The first part comprises (a1) a core-shell latex copolymer having pendant hydroxyl and pendant carbonyl groups. The second part comprises (b1) at least one polyisocyanate compound having pendant —NCO groups. The multi-part composition also includes at least one polyhydrazide compound having at least two hydrazide groups of the formula —C(?O)—NH—N(Rh)(Ri), wherein Rh and Ri are independently H or C1-C12 alkyl. The molar ratio of hydroxyl groups to —NCO groups in the composition is from 5:1 to 1:5. The molar ratio of hydrazide groups to carbonyl groups in the composition is from 5:1 to 1:5.

Abstract: A water-borne coating composition is provided. The water-borne coating composition includes water, a binder, and a crosslinker. The binder comprises (a1) a core-shell latex copolymer having pendant carbonyl groups. The crosslinker comprises (b1) at least one polyhydrazide compound having at least two hydrazide groups of the formula —C(?O)—NH—N(Rh)(Ri), wherein Rh and Ri are independently H or C1-C12 alkyl. The molar ratio of hydrazide groups to carbonyl groups in the composition is from 5:1 to 1:5.

Abstract: Coating systems, composite articles formed from the coating systems, and methods of forming the composite articles are provided herein. In an embodiment, a coating system comprises a waterborne underlying composition comprising an acrylic latex resin and a two-part waterborne clearcoat composition. The two-part waterborne clearcoat composition comprises a clearcoat binder part and a clearcoat crosslinker part. The clearcoat binder part comprises a water-dilutable, hydroxyl-functional (meth)acrylate copolymer. The clearcoat crosslinker part comprises a polyisocyanate compound having pendant —NCO groups. A cured film of the waterborne clearcoat composition having a film thickness of 67.5 ?m overlying a cured film of the waterborne underlying composition having a film thickness of 20 ?m disposed on a substrate exhibits a popping density of less than about 3 pops per square centimeter, as measured by visual observation with the naked eye at a distance of 30 cm under a fluorescent light source.

Abstract: Systems and methods for multidimensional beam refinement procedures and signaling for millimeter wave WLANs. In some embodiments, there are multi-dimensional enhanced beam refinement protocol MAC and PHY frame designs that extend the MAC packet and the PPDU format with or without backwards compatibility. The multiple dimensions may be supported jointly or separately. In other embodiments, the increased data signaled in the eBRP frame designs may be more efficiently signaled with reduced BRP frame sizes, such as through a training type dependent BRP minimum duration selection procedure or use of null data packet BRP frames. In further embodiments, the maximum duration of the interframe spacing between BPR packets may be varied to improve the efficiency of BRP operation.

Abstract: A two-part (2K) water-borne coating composition includes water; a) a binder part comprising (a1) a hydroxyl-functional (meth)acrylate copolymer; (a2) a non-aromatic polyester having active hydrogen groups; and b) a crosslinker part comprising a polyisocyanate compound having pendant —NCO groups, wherein the (a2) non-aromatic polyester has a number average molecular weight (Mn) of from 500 to 5000 Daltons, an acid value from 0 to 30 mg KOH/g, a calculated hydroxyl value of from 100 to t 600 mg KOH/g and a calculated hydroxyl functionality of from 2 to 8; and wherein the (a1) (meth)acrylate copolymer is the reaction product of a monomer mixture which comprises i) a hydroxyl functional adduct of a monoepoxyester and an unsaturated carboxylic acid; ii) a hydroxyl functional unsaturated monomer which is different from component i); iii) an unsaturated acid functional monomer; and iv) a (meth)acrylate monomer represented by Formula H2C?CGaCO2Ra??(MA).

Abstract: A two-part water-borne coating composition includes water, a) a binder part comprising (a1) a water-dilutable hydroxyl-functional (meth)acrylate copolymer; and b) a crosslinker part comprising a polyisocyanate compound having pendant—NCO groups, wherein the (meth)acrylate copolymer is the reaction product of a monomer mixture comprising, based on the total weight of monomers of the monomer mixture: from 20 to 60 wt. % of i) a hydroxyl functional adduct of a monoepoxyester and an unsaturated carboxylic acid; from 10 to 30 wt. % of ii) a hydroxyl functional unsaturated monomer different from component i); from 2 to 6 wt. % of iii) an acid functional monomer; from 20 to 60 wt. % of iv) a (meth)acrylate monomer represented by Formula H2C?CGaCO2Ra (MA); from 0 to 15 wt. % of v) a vinyl aromatic monomer; and from 0 to 20 wt. % of vi) an unsaturated monomer that is different from monomer components i) to v).

Abstract: A two-part (2K) water-borne coating composition includes a) a binder part comprising (a1) at least one hydroxyl-functional (meth)acrylate copolymer; and (a2) at least one non-aromatic polyester having active hydrogen groups; and b) a crosslinker part comprising at least one polyisocyanate compound having pendant —NCO groups, wherein the non-aromatic polyester of constituent (a2) has a number average molecular weight (Mn) of from 500 to 5000 Daltons, an acid value from about 0 to about 30 mg KOH/g, a calculated hydroxyl value of from about 100 to about 600 mg KOH/g and, a calculated hydroxyl functionality of from about 2 to about 8; and, wherein the molar ratio of active hydrogen atoms to —NCO groups in the composition is from 5:1 to 1:5.

Abstract: Systems and methods for multidimensional beam refinement procedures and signaling for millimeter wave WLANs. In some embodiments, there are multi-dimensional enhanced beam refinement protocol MAC and PHY frame designs that extend the MAC packet and the PPDU format with or without backwards compatibility. The multiple dimensions may be supported jointly or separately. In other embodiments, the increased data signaled in the eBRP frame designs may be more efficiently signaled with reduced BRP frame sizes, such as through a training type dependent BRP minimum duration selection procedure or use of null data packet BRP frames. In further embodiments, the maximum duration of the interframe spacing between BPR packets may be varied to improve the efficiency of BRP operation.

Abstract: Systems and methods for multidimensional beam refinement procedures and signaling for millimeter wave WLANs. In some embodiments, there are multi-dimensional enhanced beam refinement protocol MAC and PHY frame designs that extend the MAC packet and the PPDU format with or without backwards compatibility. The multiple dimensions may be supported jointly or separately. In other embodiments, the increased data signaled in the eBRP frame designs may be more efficiently signaled with reduced BRP frame sizes, such as through a training type dependent BRP minimum duration selection procedure or use of null data packet BRP frames. In further embodiments, the maximum duration of the interframe spacing between BPR packets may be varied to improve the efficiency of BRP operation.

Abstract: Systems and methods for multidimensional beam refinement procedures and signaling for millimeter wave WLANs. In some embodiments, there are multi-dimensional enhanced beam refinement protocol MAC and PHY frame designs that extend the MAC packet and the PPDU format with or without backwards compatibility. The multiple dimensions may be supported jointly or separately. In other embodiments, the increased data signaled in the eBRP frame designs may be more efficiently signaled with reduced BRP frame sizes, such as through a training type dependent BRP minimum duration selection procedure or use of null data packet BRP frames. In further embodiments, the maximum duration of the interframe spacing between BPR packets may be varied to improve the efficiency of BRP operation.

Abstract: Systems and methods for multidimensional beam refinement procedures and signaling for millimeter wave WLANs. In some embodiments, there are multi-dimensional enhanced beam refinement protocol MAC and PHY frame designs that extend the MAC packet and the PPDU format with or without backwards compatibility. The multiple dimensions may be supported jointly or separately. In other embodiments, the increased data signaled in the eBRP frame designs may be more efficiently signaled with reduced BRP frame sizes, such as through a training type dependent BRP minimum duration selection procedure or use of null data packet BRP frames. In further embodiments, the maximum duration of the interframe spacing between BPR packets may be varied to improve the efficiency of BRP operation.

Abstract: Systems, methods, and instrumentalities are disclosed for multi-resolution training, for example, in millimeter wave (mmW) WLAN systems. In a Multi-Resolution Beam Refinement Protocol (MR-BRP), an access point (AP)/PBSS control point (PCP) and a station (STA) may perform multi-resolution beamforming training, for example, by changing a sub-beam resolution or by maintaining sub-beam resolution while changing a resolution of the beamforming training between levels or stages of training. Sub-beam resolution may be changed, for example, by assigning different angular spreads to or by downselecting a number of antenna elements while keeping inter-element spacing constant between levels of training. Resolution of beamforming training may be changed, for example, by downsampling sub-beams or by downsampling antenna elements while adjusting inter-element spacing. Beamforming training (e.g. refinement) levels may refine beams by changing a resolution of antenna weight vectors (AWVs).

Abstract: Systems and methods for multidimensional beam refinement procedures and signaling for millimeter wave WLANs. In some embodiments, there are multi-dimensional enhanced beam refinement protocol MAC and PHY frame designs that extend the MAC packet and the PPDU format with or without backwards compatibility. The multiple dimensions may be supported jointly or separately. In other embodiments, the increased data signaled in the eBRP frame designs may be more efficiently signaled with reduced BRP frame sizes, such as through a training type dependent BRP minimum duration selection procedure or use of null data packet BRP frames. In further embodiments, the maximum duration of the interframe spacing between BPR packets may be varied to improve the efficiency of BRP operation.

Abstract: Systems, methods, and instrumentalities are disclosed for multi-resolution training, for example, in millimeter wave (mmW) WLAN systems. In a Multi-Resolution Beam Refinement Protocol (MR-BRP), an access point (AP)/PBSS control point (PCP) and a station (STA) may perform multi-resolution beamforming training, for example, by changing a sub-beam resolution or by maintaining sub-beam resolution while changing a resolution of the beamforming training between levels or stages of training. Sub-beam resolution may be changed, for example, by assigning different angular spreads to or by downselecting a number of antenna elements while keeping inter-element spacing constant between levels of training. Resolution of beamforming training may be changed, for example, by downsampling sub-beams or by downsampling antenna elements while adjusting inter-element spacing. Beamforming training (e.g. refinement) levels may refine beams by changing a resolution of antenna weight vectors (AWVs).