Disclosed is a coating agent that contains a polyorganosiloxane (1) represented by the following general formula (1), a polydiorganosiloxane (2) represented by the following general formula (2), and either one of an amino group-containing polyorganosiloxane (3) represented by the following general formula (3) and a hydroxy group-containing polyorganosiloxane (4) represented by the following general formula (4). A coating agent having improved piecing properties and a medical instrument (for example, a needle) surface-treated (coated) with the coating agent are provided.

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Polymer compositions for coating of metal surfaces including moieties that interact with a metal atom in the metal surface and optionally containing antifoulant moieties. These polymer compositions provide lubricious coatings for medical devices, anticorrosion coatings for metal components, and antifoulant coatings for marine components such as propellers. The polymer composition is synthesized in a safe manner in which the synthesis components are added to a synthesis vat and there is no need for filtration or removal of waste materials in any step including the consumer use. As such this invention provides an environmentally sound approach to composition synthesis, formulation development, and consumer use.

The present teachings generally provide curable polysiloxane compositions including a base resin including a MQ vinyl siloxane. Articles of manufacture including the curable polysiloxane compositions and slippery coatings and materials also are provided. The compositions may be used to provide slippery, lubricious, or repellent materials and coatings and may provide anti-fouling function. The compositions can provide anti-fouling or foul-release function on open surfaces, internal surfaces, membranes; to provide pinning free or low contact angle hysteresis surfaces; to provide homogeneous interface to suppress nucleation; to provide a barrier layer such as anti-corrosion; to provide anti-stain, anti-smudge, anti-fingerprint, anti-soil function.

The present teachings generally provide curable polysiloxane compositions including a base resin including a surface active polymer. Articles of manufacture including the curable polysiloxane compositions and slippery coatings and materials also are provided. The compositions may be used to provide slippery, lubricious, or repellent materials and coatings and may provide anti-fouling function. The compositions can provide anti-fouling or foul-release function on open surfaces, internal surfaces, membranes; to provide pinning free or low contact angle hysteresis surfaces; to provide homogeneous interface to suppress nucleation; to provide a barrier layer such as anti-corrosion; to provide anti-stain, anti-smudge, anti-fingerprint, anti-soil function.

The present teachings generally provide curable polysiloxane compositions including a base resin including a MQ vinyl siloxane. Articles of manufacture including the curable polysiloxane compositions and slippery coatings and materials also are provided. The compositions may be used to provide slippery, lubricious, or repellent materials and coatings and may provide anti-fouling function. The compositions can provide anti-fouling or foul-release function on open surfaces, internal surfaces, membranes; to provide pinning free or low contact angle hysteresis surfaces; to provide homogeneous interface to suppress nucleation; to provide a barrier layer such as anti-corrosion; to provide anti-stain, anti-smudge, anti-fingerprint, anti-soil function.

A machine component has a first tribological surface contacts a second tribological surface of another machine component during a machine operation. At least part of the first tribological surface is covered with a coating that includes a first coating layer and a second coating layer. The first coating layer includes an inorganic protective coating composition that is a chemically produced coating composition containing at least one of black oxide or manganese phosphate. The second coating layer includes an organically modified silane composition, in which an organically modified silane in the organically modified silane composition contains one or more amine groups. The first coating layer is in direct contact with at least part of the first tribological surface, and the second coating layer is in direct contact with at least part of the first coating layer.