The invention relates to a wetting composition comprising a surfactant selected from a non-ionic, cationic, anionic and amphoteric surfactant in combination with from 10 to less than 50 wt % of at least one C10 to C14 alcohol and 10 to 30 wt % of a C4-C6 oxygen containing co-solvent, to methods for using the wetting composition and products containing the wetting composition.

The invention relates to a wetting composition comprising a surfactant selected from a non-ionic, cationic, anionic and amphoteric surfactant in combination with from 10 to less than 50 wt % of at least one C10 to C14 alcohol and 10 to 30 wt % of a C4-C6 oxygen containing co-solvent, to methods for using the wetting composition and products containing the wetting composition.

One aspect of the present invention relates to a resin composition containing a polyrotaxane (A), an epoxy resin (B), and a curing agent (C), in which the curing agent (C) contains an acid anhydride (C-1) in an amount of 0.1 parts by mass or more and less than 10 parts by mass based on a total of 100 parts by mass of the polyrotaxane (A), the epoxy resin (B), and the curing agent (C).

One aspect of the present invention relates to a resin composition containing a polyrotaxane (A), an epoxy resin (B), and a curing agent (C), in which the curing agent (C) contains an acid anhydride (C-1) in an amount of 0.1 parts by mass or more and less than 10 parts by mass based on a total of 100 parts by mass of the polyrotaxane (A), the epoxy resin (B), and the curing agent (C).

Disclosed is a preparation method for polylactic acid grafted chitosan nanowhiskers, and belongs to the technical field of materials. The preparation method of the disclosure is that after lactide, a catalyst and chitosan are uniformly mixed, polymerization grafting is performed to prepare PLA-g-CS, and then the PLA-g-CS is dispersed into an alkali liquor to obtain nanowhiskers by a repeated freezing/unfreezing method, with no solvent used in a polymerization grafting process. The method has advantages that the nanowhiskers can be prepared from the PLA-g-CS without a good solvent, and the whole reaction is efficient, clean, and environmentally friendly.

Provided is silica powder that, when used as a resin filler such as a semiconductor sealant, allows for obtaining a resin composition having excellent gap permeability and low viscosity. The silica powder is such that (1) a cumulative 50% mass diameter D.sub.50 of a mass-based particle size distribution obtained by a centrifugal sedimentation method is 300 nm to 500 nm (preferably, 330 nm to 400 nm), (2) a loose bulk density is 250 kg/m.sup.3 to 400 kg/m.sup.3 (preferably, 270 kg/m.sup.3 to 350 kg/m.sup.3), and (3) {(D.sub.90−D.sub.50)/D.sub.50}×100 is 30% to 45%. In a silica production method in which a silicon compound is burned, silica powder can be produced by installing a burner having a concentric multiple pipe structure of three or more pipes in a reactor which has a cooling jacket portion provided around the burner, and adjusting flame combustion conditions and cooling conditions.

Provided is silica powder that, when used as a resin filler such as a semiconductor sealant, allows for obtaining a resin composition having excellent gap permeability and low viscosity. The silica powder is such that (1) a cumulative 50% mass diameter D.sub.50 of a mass-based particle size distribution obtained by a centrifugal sedimentation method is 300 nm to 500 nm (preferably, 330 nm to 400 nm), (2) a loose bulk density is 250 kg/m.sup.3 to 400 kg/m.sup.3 (preferably, 270 kg/m.sup.3 to 350 kg/m.sup.3), and (3) {(D.sub.90−D.sub.50)/D.sub.50}×100 is 30% to 45%. In a silica production method in which a silicon compound is burned, silica powder can be produced by installing a burner having a concentric multiple pipe structure of three or more pipes in a reactor which has a cooling jacket portion provided around the burner, and adjusting flame combustion conditions and cooling conditions.

There is described an acrylic polyester resin, obtainable by grafting an acrylic polymer with a polyester material. The polyester material is obtainable by polymerizing (i) a polyacid component, with (ii) a polyol component, including—2,2,4,4-tetraallcylcyclobutane-1,3-diol. One of the polyacid component or the polyol component comprises a functional monomer operable to impart functionality on to the polyester resin, such that an acrylic polymer may be grafted with the polyester material via the use of said functionality. Also provided is an aqueous coating composition comprising the acrylic polyester resin and a metal packaging containing coated with the composition.

Provided is a metal-glass fiber-reinforced thermoplastic resin composite material that can have excellent bonding force and heat cycle resistance between a metal material and a glass fiber-reinforced thermoplastic resin material. The metal-glass fiber-reinforced thermoplastic resin composite material of the present invention is a metal-glass fiber-reinforced thermoplastic resin composite material including a metal material and a glass fiber-reinforced thermoplastic resin material located on at least one surface of the metal material, wherein glass fiber included in the glass fiber-reinforced thermoplastic resin material having a Vickers hardness H in the range of 700 to 800 HV0.2 and an elastic modulus M in the range of 70.0 to 110.0 GPa, and the Vickers hardness H and the elastic modulus M satisfy the following formula (1): 849.5 ≤ M.sup.3/H ≤ 940.5...(1).

A biodegradable polyester is provided. The biodegradable polyester is a transesterification or esterification reaction product of a reactant (a) and a reactant (b). The reactant (a) is a modified linear saccharide oligomer. The reactant (b) is a polyester, or the reactant (b) includes a dicarboxylic acid and a diol. The modified saccharide oligomer is a reaction product of a saccharide oligomer and a modifier.