Abstract:
Fast cure resin system comprise semisolid epoxy resins and finely divided curatives of particle size less than 25 microns. The resins are dry to the touch, can be readily combined with fibrous reinforcement to provide prepregs which can be rapidly cured in a short moulding cycle.
Abstract:
Provided are a resin composition with high adhesion to substrates under hot and humid conditions, a two-part laminate adhesive containing the resin composition, and a laminated film and backsheet for solar cells including a layer of the adhesive. The resin composition contains, as essential components, a polyester polyurethane polyol (A) having a branched structure in a molecule thereof and having a weight average molecular weight (Mw) of 25,000 to 200,000 and a molecular weight distribution (Mw/Mn) of 2.5 to 25; a hydroxyl-containing epoxy resin (B) having a number average molecular weight (Mn) of 300 to 5,000; a hydroxyl-containing polycarbonate resin (C) having a number average molecular weight (Mn) of 300 to 3,000; and a polyisocyanate (D).
Abstract:
A conductor layer is formed on one surface of a base insulating layer. The conductor layer is composed of a pair of rectangular collector portions and drawn-out conductor portions extending in long-sized shapes from the collector portions, respectively. Cover layers are formed on the base insulating layer to cover respective given portions of the conductor layer. A paste composition containing a compound represented by the formula (1) is used as a material for the cover layer.
Abstract:
Processes for making ivalent germanium and tin compounds are provided. The divalent germanium and tin compounds have been found to be efficient catalysts for the formation of polyurethanes.
Abstract:
The present invention provides an aqueous intermediate coating composition comprising: (A) a resin containing hydroxyl and carboxyl groups with a hydroxyl value of 100 to 200 mg KOH/g and an acid value of 20 to 50 mg KOH/g; (B) at least one curing agent selected from the group consisting of melamine resins and blocked polyisocyanate compounds; and (C) flat pigment particles; the molecular weight distribution of a curable resin component comprising component (A) and component (B) including from 30 to 50% by weight of a component with a molecular weight of less than 1,000, and 10% by weight or less of a component with a molecular weight exceeding 100,000; the proportion of component (C) being from 2 to 15 parts by weight based on 100 parts by weight of the resin component; and when the intermediate coating composition is applied to an undercoating film, pre-dried at 100° C. for 30 minutes and then heat-cured at 145° C. for 30 minutes, the film thickness shrinkage percentage of the cured coating film being 20% or less based on the film thickness of the coating film after pre-drying. The invention also provides a method for forming a multilayer coating film using the aqueous intermediate coating composition.
Abstract:
A solventless laminating adhesive comprising a polyisocyanate component and a polyol component, both of which are free from polyol components exhibiting crystalline properties at ordinary temperatures. The adhesive exhibits an initial viscosity of 500 to 1000 mPa s three minutes after mixing of the polyisocyanate component with the polyol component and a viscosity increase of 100 to 350% based on the initial viscosity 20 minutes after the mixing. In a coater which is provided with a pair of opposed rolls and in which the rolls rotates in the directions contrary to each other at the opposition site, the adhesive is applied to a film passing between the rolls.
Abstract:
Processes for polyurethane polymerization are provided. The processes use polysilyl derivatives of germanium and tin as catalysts. Polyurethanes made using the catalysts have increased gel times as compared to polyurethanes made using conventional processes.
Abstract:
The present invention relates to monomeric bivalent phenoxy tin compounds, processes for making the phenoxy tin compounds, and processes for making polyurethanes using the tin compounds as polymerization catalysts.
Abstract:
A coating composition comprising a first component having a first polyester polyol having a first functionality, and a second polyester polyol having a second functionality, wherein the second functionality is greater than the first functionality, and a second component comprising an isocyanate, wherein the coating has an NCO:OH ratio of 1:1 or greater is disclosed. A coated flexible substrate comprising a flexible substrate, and a coating deposited on at least a portion of the substrate, wherein the coating comprises a first component having a first polyester polyol having a first functionality and a second polyester polyol having a second functionality, wherein the second functionality is greater than the first functionality and a second component comprising an isocyanate is also within the scope of the present invention.