The present application relates to a UV-LED curable coating composition, including: (a) at least one amine-modified polyether acrylate; (b) at least one (meth)acrylate polymer different from (a); (c) at least one multifunctional thiol compound; and (d) at least one acylphosphine oxide as a photoinitiator. In addition, the present application further relates to an article including a substrate partially or fully coated with the UV-LED curable coating composition.

A method for improving corrosion resistance of vinyl ester resin is provided, which belongs to the technical field of polymer materials. The method includes adding vinyl ester resin into a MXene nanosheet solution and evaporating the solvent; then adding cobalt isooctoate promoter and butanone peroxide initiator in sequence, standing for curing after defoaming, and then heating.

A method for improving corrosion resistance of vinyl ester resin is provided, which belongs to the technical field of polymer materials. The method includes adding vinyl ester resin into a MXene nanosheet solution and evaporating the solvent; then adding cobalt isooctoate promoter and butanone peroxide initiator in sequence, standing for curing after defoaming, and then heating.

A curable coating composition is provided having multi-functionalized acrylic copolymer and amino-functional silicone resin curing agents. The acrylic copolymer of the curable coating composition has, in polymerized form, epoxy functionalized groups and cure compatibility groups and the amino-functional silicone resin is an aryloxy-containing amino-functional siloxane, which optionally is derived from sterically hindered alcohol-amine precursor moieties. The coating compositions are useful in the field of superior weatherable and durable coatings and are useful to replace isocyanate-containing polyurethane based coatings. Also provided are coated articles produced from the curable composition.

A curable coating composition is provided having multi-functionalized acrylic copolymer and amino-functional silicone resin curing agents. The acrylic copolymer of the curable coating composition has, in polymerized form, epoxy functionalized groups and cure compatibility groups and the amino-functional silicone resin is an aryloxy-containing amino-functional siloxane, which optionally is derived from sterically hindered alcohol-amine precursor moieties. The coating compositions are useful in the field of superior weatherable and durable coatings and are useful to replace isocyanate-containing polyurethane based coatings. Also provided are coated articles produced from the curable composition.

Thermosetting powder coating compositions and processes for making the thermosetting powder coating compositions and processes for coating an article with the thermosetting powder coating compositions are disclosed. Cured thermosetting powder coating compositions are obtained by curing of the thermosetting powder coating compositions of the invention. Articles are provided having coated thereon the thermosetting powder coating compositions as well as to articles having coated and cured thereon the thermosetting powder coating compositions. The thermosetting powder coating compositions exhibit a substantially lower T.sub.chalk-free, that is a ΔT.sub.chalk-free which is in the range of from and including 5 up to and not including 10° C., wherein ΔT.sub.chalk-free=T.sub.chalk-free.sup.REF−T.sub.chalk-free.sup.A where T.sub.chalk-free.sup.A is the T.sub.chalk-free of a thermosetting powder coating composition according to the invention (TPCC-A) and T.sub.chalk-free.sup.REF is the T.sub.chalk-free of a thermosetting powder coating composition not according to the invention (TPCC-REF) that is comparable to TPCC-A.

Thermosetting powder coating compositions and processes for making the thermosetting powder coating compositions and processes for coating an article with the thermosetting powder coating compositions are disclosed. Cured thermosetting powder coating compositions are obtained by curing of the thermosetting powder coating compositions of the invention. Articles are provided having coated thereon the thermosetting powder coating compositions as well as to articles having coated and cured thereon the thermosetting powder coating compositions. The thermosetting powder coating compositions exhibit a substantially lower T.sub.chalk-free, that is a ΔT.sub.chalk-free which is in the range of from and including 5 up to and not including 10° C., wherein ΔT.sub.chalk-free=T.sub.chalk-free.sup.REF−T.sub.chalk-free.sup.A where T.sub.chalk-free.sup.A is the T.sub.chalk-free of a thermosetting powder coating composition according to the invention (TPCC-A) and T.sub.chalk-free.sup.REF is the T.sub.chalk-free of a thermosetting powder coating composition not according to the invention (TPCC-REF) that is comparable to TPCC-A.

The present invention provides a sulfonium salt photoinitiator, a preparation method therefor, a photocurable composition comprising sulfonium salt photoinitiator, and use thereof. The sulfonium salt photoinitiator has a structure represented by formula (I). By modifying the structure of an existing sulfonium salt photoinitiator, a sulfonium salt photoinitiator having a new structure is obtained, which can exhibits a higher photosensitivity and an excellent as well as characteristics of low odor and low toxicity, when being used in a photocurable composition. This is significantly superior to existing similar photoinitiators. ##STR00001##

Provided is a matte-like cured coating film that is provided on a substrate such as a wiring boar, in which scratches are unnoticeable. The cured coating film is a cured coating film of a curable resin composition provided on the substrate. The cured coating film satisfies Gs (20°)≤5 and Gs (85°)≥35 and has a ratio R represented by the formula R={Gs (85°)/Gs (60°)}/{Gs (60°)/Gs (20°)} ranging from 0.35 to 4.0, where Gs (20°), Gs (60°), and Gs (85°) are 20° gloss, 60° gloss, and 85° gloss on a surface of the cured coating film measured according to JIS Z 8741-1997, respectively.

Provided is a matte-like cured coating film that is provided on a substrate such as a wiring boar, in which scratches are unnoticeable. The cured coating film is a cured coating film of a curable resin composition provided on the substrate. The cured coating film satisfies Gs (20°)≤5 and Gs (85°)≥35 and has a ratio R represented by the formula R={Gs (85°)/Gs (60°)}/{Gs (60°)/Gs (20°)} ranging from 0.35 to 4.0, where Gs (20°), Gs (60°), and Gs (85°) are 20° gloss, 60° gloss, and 85° gloss on a surface of the cured coating film measured according to JIS Z 8741-1997, respectively.