53results about How to "Reduce resin viscosity" patented technology

Disclosed is an unsaturated polyester resin composition comprising an unsaturated polyester (A) and a polymerizable unsaturated monomer (B), wherein the "shrinkage stress upon cooling" of a cured article thereof is 17 MPa or less and the ratio of the "shrinkage stress upon cooling / elastic limit" is 1 or less. The cured article has excellent gloss retention and yellowing resistance.

The present inventors provides polyol-containing resin compositions for coatings which can give cured coating films having high hardness and at the same time high solid compositions to meet the recent resources saving and / or environmental protection requirements, and curable coating compositions having high reactivity at curing, giving the coating film with good appearance and the coatings with prolonged pot life.The invention is directed to a resin composition for coatings comprising a polyol (A1) or (A2), a polyether polyol (B) and a solvent (C),wherein the polyol (A1) comprises a hydroxyl-containing polymerizable unsaturated monomer and a ring structure-containing polymerizable unsaturated monomer as essential componentsand the polyol (A2) comprises a hydroxyl-containing polymerizable unsaturated monomer and a linear branched structure-containing polymerizable unsaturated monomer as essential components.

A thermosetting resin compositing having an essential component (A) organopolysiloxane containing a compound represented by following general formula (1) or (2) and optical semiconductor peripheral material using the composition. [Herein, in the formulas, R1 independently represents a substituted or non-substituted monovalent hydrocarbon radical with the carbon number of 1 to 10, R2 represents an epoxy group-containing organic group, R3 represents R1 or R2, a independently represents an integer of 2 or more, b independently represents an integer of 0 or more, X represents general formula (3), Y represents -o- or a bivalent hydrocarbon radical with the carbon number of 1 to 6, Z represents following formula (4), R1 in the formula independently represents a substituted or non-substituted monovalent hydrocarbon radical with the carbon number of 1 to 10, and c represents an integer of 0 or more.]

An FRP is produced using a prepreg comprising reinforcing fiber, a sheet-like reinforcing fiber substrate containing reinforcing fiber, and a matrix resin, wherein the matrix resin is impregnated into the sheet-like reinforcing fiber substrate and also covers one surface of the sheet-like reinforcing fiber substrate, and the matrix resin impregnation ratio is within a range of 35% to 95%; a prepreg comprising reinforcing fiber, a sheet-like reinforcing fiber substrate containing reinforcing fiber, and a matrix resin, wherein the matrix resin exists on both surfaces of the sheet-like reinforcing fiber substrate, and the portion inside the sheet-like reinforcing fiber substrate into which the matrix resin has not been impregnated is continuous; or a prepreg comprising reinforcing fiber, a sheet-like reinforcing fiber substrate containing reinforcing fiber, and a matrix resin, wherein at least one surface exhibits a sea-and-island-type pattern comprising resin-impregnated portions (island portions) where the matrix resin is present at the surface and fiber portions (sea portions) where the matrix resin is not present at the surface, the surface coverage ratio of the matrix resin on those surfaces with said a sea-and-island-type pattern is within a range of 3% to 80%, and the weave intersection coverage ratio for the island portions, represented by a formula (1) shown below, is at least 40%, displays excellent external appearance, with no internal voids or surface pinholes, even when molded is conducted using only vacuum pressure.Island portions weave intersection coverage ratio (%)=(T / Y)×100  (1)(wherein, T represents a number of island portions that cover weave intersections, and Y represents a number of weave intersections within said reinforcing fiber woven fabric on said surface with said sea-and-island-type pattern).