The present disclosure provides a self-healing coating composition precursor that includes a soft segment precursor, a hard segment precursor, and a diol. The present disclosure also provides self-healing coatings including the same for scratches and deep cracks and/or anti-fouling property, and methods of preparation and use thereof.

A lacquer composition is provided, comprising 20%-79.9% by weight, based on the total weight of the composition, of a thiol compound having two or more thiol groups, 20%-79.9% by weight, based on the total weight of the composition, of a compound having two or more carbon-carbon double bonds and 0.1%-10% by weight, based on the total weight of the composition, of a separating agent having an alkyl radical having 4-20 carbon atoms, where the alkyl radical is unsubstituted or fluorine-substituted and the alkyl radical is bonded to a functional group. Also provided are the use of this lacquer composition as a protective lacquer on an optical surface of an optical element in the production of the optical element, and an optical element comprising the protective lacquer.

A method for preparing a transparent flexible polyurethane film includes the following steps: (1) mixing a hydroxyl-terminated polyalkylene carbonate diol, a diisocyanate compound, 2,2-dithiodiethanol, dibutyltin dilaurate and a chloroalkane solvent, and then reacting at 40 to 60? C. for 0.5 to 3 h to obtain an isocyanate-terminated oligomer solution; and (2) adding a polyol cross-linking agent, a bistrifluoromethanesulfonimide lithium salt and a 1-ethyl-3-methylimidazole bistrifluoromethanesulfonimide salt to the isocyanate-terminated oligomer solution, reacting at 40 to 60? C. for 0.5 to 1.5 h, removing the chloroalkane solvent to obtain the transparent flexible polyurethane film.

The present invention addresses the problem of providing an eyeglass lens that has excellent UV absorption properties and low yellowness. This eyeglass lens is produced using a resin composition that contains at least one isocyanate compound selected from the group consisting of 2,5-bis(isocyanatomethyl)bicyclo[2.2.1]heptane and 2,6-bis(isocyanatomethyl)bicyclo[2.2.1]heptane; a polythiol compound; a UV absorber represented by formula (1); and a UV absorber represented by formula (2). The M value represented by formula (X) is greater than 0.7 but less than 16.7.

The composition according to an embodiment employs a mixture of curing agents, which comprises a first curing agent containing sulfur and a second curing agent containing an ester group, whereby it is possible to control the physical properties of the polishing pad as necessary.

The composition according to an embodiment employs a mixture of curing agents, which comprises a first curing agent containing sulfur and a second curing agent containing an ester group, whereby it is possible to control the physical properties of the polishing pad as necessary.

The invention relates to new, water-emulsifiable isocyanates, to a process for preparing water-emulsifiable isocyanates, and to the use thereof.

The self-healing cross-linked polymer comprises units of formula (I), wherein: P is a polymeric chain, R.sub.1 and R.sub.1 are independently selected from the group consisting of: H, (C.sub.1-C.sub.20)alkyl, (C.sub.5-C.sub.14)aryl, OR.sub.4, (CO)R.sub.5, O(CO)R.sub.6, (SO)R.sub.7, NHCOR.sub.8, COOR.sub.9, NR.sub.10R.sup.11, NO.sub.2, and halogen; R.sub.2, R.sub.2, R.sub.3 and R.sub.3 are independently selected from the group consisting of: H, (C.sub.1-C.sub.20)alkyl and (C.sub.5-C.sub.14)aryl; R.sub.4 to R.sub.11 are the same or different, and are selected from the group consisting of: H, (C.sub.1-C.sub.20)alkyl, and (C.sub.5-C.sub.14)aryl; m is from 3 to 4; n is from 1 to 2; provided that n+m is 5; the polymer having H-bonding interactions and being able to undergo catalyst free aromatic disulfide metathesis at room-temperature, and having a tensile strength value from 0.5 to 1.5 MPa and an elongation at break value higher than 200% at room-temperature.

##STR00001##

The present disclosure relates to an alkoxysilane functional polyurethane-urea that can be used to prepare an adhesive or coating composition. The polyurethane-urea is obtainable by polymerization of reaction components comprising (a) an alkoxysilane functional thioether diol; (b) a polyisocyanate; and (c) an alkoxysilane functional aspartate ester, wherein the alkoxysilane functional aspartate ester is a Michael addition product of an amino-functional silane and an unsaturated diester. The polyurethane-urea has a low viscosity and can be used in solvent- and water-free adhesives or coatings. The adhesive or coating can be applied to various substrates such as wood, wood-containing composite, metal, plastics, paper, stone, glass or concrete.

Disclosed herein are self-healing oligomers according to the structure [UPy-(D.sub.m-U-D.sub.m)(.sub.2+q)]-[A(G)(.sub.n1)-D.sub.m].sub.k-Z; wherein UPy, D, m, U, q, A, G, n, k, and Z are defined and described further herein, and wherein the oligomer possesses at least 3 urethane linking groups and comprises a backbone derived from a polyether polyol, a polyester polyol, a poly(dimethylsiloxane), a disulfide polyol, or combinations thereof. Also described and claimed are various compositions containing such oligomers as part of a self-healing component, wherein such compositions also include an optional reactive monomer and/or oligomer component and a photoinitiator component. Yet further described and claimed are articles cured from the compositions elsewhere described using the oligomers elsewhere described.