An anti-fogging agent containing silica particles, a binder compound, and a silane coupling agent that is an acid anhydride or a dicarboxylic acid compound. An anti-fogging agent containing a synthetic product A obtained by reacting a silane coupling agent that is an acid anhydride or a dicarboxylic acid compound with a binder compound; and silica particles.

The invention relates to the use of polymers and polymeric agents in preventing hard and soft fouling and corrosion, particularly although not exclusively, on the surface of marine equipment. Additionally, the invention relates to the novel combination of polymers with a ceramic coating, and its use as an anti-fouling or anti-corrosive agent.

Provided is an anti-icing coating and anti-icing coating film. The anti-icing coating including components (A) to (E): component (A): a coating resin in an amount of 20 to 40% by mass, component (B): a porous filler in an amount of 10 to 30% by mass, component (C): a hydrophobic agent in an amount of 2 to 20% by mass, component (D): a wax with a melting point of 60 to 160 C. in an amount of 1 to 10% by mass, component (E): an organic solvent in an amount of balance. The component (A) can be the following modified polymer, which has: a main chain composed of (a) a fluoropolymer, and side chains based on monomers represented by formulas (b) and (c),

CH.sub.2C(R.sup.1)C(O)OSi(CH.sub.3).sub.2[OSi(CH.sub.3).sub.2].sub.nOSi(CH.sub.3).sub.2R.sup.2(b)

CH.sub.2C(R.sup.3)C(O)XY(c).

Also provided is an anti-fouling coating and anti-fouling coating film. The anti-fouling coating including the above-mentioned modified polymer, a curing agent and an organic solvent.

A method of inhibiting corrosion of a metal surface, including contacting the metal surface with a chitosan salt in the presence of a corrosive medium. On contacting the metal surface, at least a portion of the chitosan salt adsorbs to the metal surface. At least one unit in the chitosan salt has the following formula (I),

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The indicates bonding to additional units of the chitosan salt. The chitosan salt has a higher solubility in water than a same chitosan that is not in a salt form. The metal surface in the corrosive medium has a corrosion inhibition efficiency at least 80% higher than a same metal surface in the corrosive medium that is not contacted with the chitosan salt.

The present disclosure is related to a coating method of a long-chain entangled PDMS (LEP) gel in which self-replenishment of a lubricating layer is sustainable. More specifically, it is possible to achieve excellent slippery properties, anti-fouling performance, and anti-icing performance for a long period of time due to sustainable self-replenishment performance of a surface coated with LEP gel, by forming LEP gel impregnated with a low-viscosity silicone oil as a lubricant into the surface of long-chain entangled PDMS (LEP), in which long-chain free polymers are entangled in PDMS networks.

A fluoroacrylic compound of formula (1) which, when added to an actinic-ray-curable composition, can impart excellent liquid repellency, antifouling properties, and wear resistance.
YRf.sup.1Z.sup.1-Q.sup.1-[Z.sup.2X].sub.a(1)
[Rf.sup.1 is a divalent perfluoropolyether group. Z.sup.1 is a divalent hydrocarbon group optionally containing O, N, or Si. Q.sup.1 is an (a+1)-valent linking group including a+1 or more Si atoms. Z.sup.2 is a divalent alkylene ether group. X is H or a monovalent organic group having an (-substituted) acryl group, and at least one of the X moieties is a monovalent organic group having an (-substituted) acryl group. Symbol a is 1-10. Y is F or Z.sup.1-Q.sup.1-[Z.sup.2X].sub.a. All of the Z.sup.1 moiety and the a Z.sup.2 moieties within the [ ] have been bonded to the Si atoms contained in the Q.sup.1 and the molecule has no urethane bond therein.]

The invention is related to a cost-effective method for making a silicone hydrogel contact lens having a crosslinked hydrophilic coating thereon. A method of the invention involves heating a silicone hydrogel contact lens in an aqueous solution in the presence of a water-soluble, highly branched, thermally-crosslinkable hydrophilic polymeric material having positively-charged azetidinium groups, to and at a temperature from about 40 C. to about 140 C. for a period of time sufficient to covalently attach the thermally-crosslinkable hydrophilic polymeric material onto the surface of the silicone hydrogel contact lens through covalent linkages each formed between one azetidinium group and one of the reactive functional groups on and/or near the surface of the silicone hydrogel contact lens, thereby forming a crosslinked hydrophilic coating on the silicone hydrogel contact lens. Such method can be advantageously implemented directly in a sealed lens package during autoclave.

Biofouling of roof structures is reduced by applying to the roof a coating composition that contains an acrylic binder and a non-toxic antifouling additive that interferes with the ability of biofoulants to attach to the coating. Examples of non-toxic antifouling additives include polysiloxanes and cross-linked silicone rubbers.

A poly(beta-aminoester) polymer of formula (I) or a pharmaceutically salt thereof which comprises one or more zwitterionic polymers. Advantageously, the polymer of the invention shows improved properties when formulated in the form of nanoparticles. Processes for the preparation of the polymer, nanoparticles comprising a polymer of Formula (I) and uses thereof.

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Provided are a liquid jetting structure body, a liquid jetting head, and a liquid jetting device, in which a jetting surface has excellent wipe resistance.

The liquid jetting structure body and its applications include a nozzle substrate on which a nozzle jetting a liquid is formed, in which a liquid-repellent layer is provided on a jetting surface of the nozzle substrate, and the liquid-repellent layer contains a compound having a hydrocarbon group having 8 or more carbon atoms.