Proppant particles coated with a resin system containing a reactive resin and an organopolysiloxane having at least three successive siloxy units and at least one pendent or terminal group which contains at least four atoms selected from C, N, P, O, and S, exhibit higher degrees of coating and decreased fracture and release of fines at high pressure, thus enhancing fracking performance.

A composition for use in coating surfaces and a method for coating surfaces with the composition is disclosed. The composition comprises a first component including a waterborne amine curing agent, a second component including an epoxy resin, and a third component including zinc dust. The first component, the second component, and the third component being combinable to provide a zinc-rich waterborne epoxy coating, wherein the coating composition provides an anti-corrosion protection to a metal substrate.

A composition for use in coating surfaces and a method for coating surfaces with the composition is disclosed. The composition comprises a first component including a waterborne amine curing agent, a second component including an epoxy resin, and a third component including zinc dust. The first component, the second component, and the third component being combinable to provide a zinc-rich waterborne epoxy coating, wherein the coating composition provides an anti-corrosion protection to a metal substrate.

An epoxy composition is provided that includes a polyepoxy aniline, a rheology modifier, a filler, and a polyamine hardener comprising a cyclic hydrocarbon-containing polyamine. When cured, the epoxy composition provides an advantageous chemical resistance at high temperatures and pressures. Additionally, the cured epoxy compositions have good adhesion to substrates and resist blistering.

An epoxy composition is provided that includes a polyepoxy aniline, a rheology modifier, a filler, and a polyamine hardener comprising a cyclic hydrocarbon-containing polyamine. When cured, the epoxy composition provides an advantageous chemical resistance at high temperatures and pressures. Additionally, the cured epoxy compositions have good adhesion to substrates and resist blistering.

The corrosion of unprotected steel substrates causes damage that is costly to repair or replace. Current protective coatings predominately rely on environmentally harmful anticorrosive agents and toxic solvents to protect the underlying substrate. The use of lawsone (2-hydroxy-1,4-napthoquinone) together with a environmentally benign epoxy coating provides an environmentally-friendly alternative for common protective coatings. Microencapsulated lawsone embedded coatings allows the anticorrosive agent to remain dormant until released by damage and is then deposited directly onto the steel substrate. Both visual and electrochemical analysis shows that this self-protective scheme leads to 60% corrosion inhibition in a neutral salt water solution.

The corrosion of unprotected steel substrates causes damage that is costly to repair or replace. Current protective coatings predominately rely on environmentally harmful anticorrosive agents and toxic solvents to protect the underlying substrate. The use of lawsone (2-hydroxy-1,4-napthoquinone) together with a environmentally benign epoxy coating provides an environmentally-friendly alternative for common protective coatings. Microencapsulated lawsone embedded coatings allows the anticorrosive agent to remain dormant until released by damage and is then deposited directly onto the steel substrate. Both visual and electrochemical analysis shows that this self-protective scheme leads to 60% corrosion inhibition in a neutral salt water solution.

The present invention relates to a novel compound having an alkoxysilyl group and an active ester group, a method for preparing the same, a composition comprising the same, and a use, wherein the novel compound exhibits improved low moisture absorption and/or low dielectric properties when cured as an epoxy composition, but is not accompanied by loss of thermal expansion characteristics. Disclosed are a novel compound of formulae AF to LF having an alkoxysilyl group and an active ester group, and a method for preparing the same, a composition comprising the same, and a use of same.

The present invention relates to a novel compound having an alkoxysilyl group and an active ester group, a method for preparing the same, a composition comprising the same, and a use, wherein the novel compound exhibits improved low moisture absorption and/or low dielectric properties when cured as an epoxy composition, but is not accompanied by loss of thermal expansion characteristics. Disclosed are a novel compound of formulae AF to LF having an alkoxysilyl group and an active ester group, and a method for preparing the same, a composition comprising the same, and a use of same.

The present application relates to a coating composition and wood article manufactured therefrom, the coating composition comprising: (A) a film-forming resin composition comprising a reactive donor capable of providing two or more nucleophilic carbanions, and a reactive acceptor comprising two or more carbon-carbon double bonds; (B) a catalyst for catalyzing the Michael addition crosslinking reaction between the reactive donor and the reactive acceptor, wherein the reactive donor has an aromatic epoxy backbone, and wherein the reactive donor has an epoxy equivalent weight in the range of from 400 to 1100 g/mol, preferably in the range of from 470 to 1000 g/mol, more preferably in the range of from 470 to 900 g/mol.