Abstract: In various embodiments, a resin composition includes a urethane (meth)acrylate, a reactive diluent, and a urethane (meth)acrylate toughener. The urethane (meth)acrylate toughener includes at least one additional polyol having a number average molecular weight Mn of greater than 1,000 g/mol. Cured articles made from the resin composition have an average fracture toughness (KIc) value from 1 MPa*m1/2 to 3 MPa*m1/2 when measured in accordance with ASTM D5045. Processes for making the resin composition as well as processes using the resin composition are also provided.

Abstract: A curable resin composition comprising: (1) a urethane (meth)acrylate; (2) a reactive diluent selected from the group consisting of i) a hydroxyl alkyl (meth)acrylate monomer where the acrylate group, which is attached to the carbonyl group, is attached to a hydrogen or a methyl group and the carbonyl group is attached to the hydroxyl group thru an R2 alkylene group containing 2 to 18 carbon atoms per molecule.

Abstract: Controllable-cure urethane acrylate resin compositions are disclosed, comprising (A) a urethane acrylate having free hydroxyalkyl (meth) acrylate prepared from a polyurethane prepolymer having a free terminal isocyanate group and a hydroxyalkyl (meth)acrylate, the urethane acrylate having free hydroxyalkyl (meth) acrylate being the reaction product of capping the polyurethane prepolymer in the presence excess of the hydroxyalkyl (meth)acrylate, (B) a polyisocyanate-based thickening agent, and optionally an additional hydroxyalkyl (meth)acrylate, wherein the polyisocyanate-based thickening agent (B) and the urethane acrylate having free hydroxyalkyl (meth) acrylate (A), and optionally the additional hydroxyalkyl (meth)acrylate, are present at NCO/OH molar ratio of from 0.2 to 10.0. Methods for making controllable-cure urethane acrylate resin compositions are disclosed.

Abstract: A process for making a curable resin composition comprising the steps of: (1) reacting a) an isocyanate; and b) a polyol mixture with a bimodal distribution of i) a first polyol mixture comprising polyols having an average equivalent weight of from 50 to 400; and ii) a second polyol mixture comprising polyols having an average equivalent weight of from 1000 to 5000 to form a urethane prepolymer; and (2) adding a capping agent to the urethane prepolymer to form the curable resin composition.

Abstract: Controllable-cure urethane acrylate resin compositions are disclosed, comprising (A) a urethane acrylate having free hydroxyalkyl (meth) acrylate prepared from a polyurethane prepolymer having a free terminal isocyanate group and a hydroxyalkyl (meth)acrylate, the urethane acrylate having free hydroxyalkyl (meth) acrylate being the reaction product of capping the polyurethane prepolymer in the presence excess of the hydroxyalkyl (meth)acrylate, (B) a polyisocyanate-based thickening agent, and optionally an additional hydroxyalkyl (meth)acrylate, wherein the polyisocyanate-based thickening agent (B) and the urethane acrylate having free hydroxyalkyl (meth) acrylate (A), and optionally the additional hydroxyalkyl (meth)acrylate, are present at NCO/OH molar ratio of from 0.2 to 10.0. Methods for making controllable-cure urethane acrylate resin compositions are disclosed.

Abstract: A process for making a curable resin composition comprising the steps of: (1) reacting a) an isocyanate; and b) a polyol mixture with a bimodal distribution of i) a first polyol mixture comprising polyols having an average equivalent weight of from 50 to 400; and ii) a second polyol mixture comprising polyols having an average equivalent weight of from 1000 to 5000 to form a urethane prepolymer; and (2) adding a capping agent to the urethane prepolymer to form the curable resin composition.

Abstract: A curable resin composition comprising: (1) a urethane (meth)acrylate; (2) a reactive diluent comprising at least 20 percent by weight of glycols and/or polyols with terminal acrylate or methacrylate groups; and (3) a free radical-generating catalyst, is disclosed.

Abstract: A curable resin composition comprising: (1) a urethane (meth)acrylate; (2) a reactive diluent selected from the group consisting of i) a hydroxyl alkyl (meth)acrylate monomer where the acrylate group, which is attached to the carbonyl group, is attached to a hydrogen or a methyl group and the carbonyl group is attached to the hydroxyl group thru an R2 alkylene group containing 2 to 18 carbon atoms per molecule.

Abstract: In various embodiments, a resin composition includes a urethane (meth)acrylate, a reactive diluent, and a urethane (meth)acrylate toughener. The urethane (meth)acrylate toughener includes at least one additional polyol having a number average molecular weight Mn of greater than 1,000 g/mol. Cured articles made from the resin composition have an average fracture toughness (KIc) value from 1 MPa*m1/2 to 3 MPa*m1/2 when measured in accordance with ASTM D5045. Processes for making the resin composition as well as processes using the resin composition are also provided.

Abstract: A curable resin composition comprising: (1) a urethane (meth)acrylate comprising a) urethane (meth)acrylate oligomers with a number average molecular weight in the range of from 400 to 1500; and b) urethane (meth)acrylate oligomers with a number average molecular weight in the range of from 1500 to 10000, present in a weight ratio of from 0.1:1 to 25:1; (2) a reactive diluent; and (3) a free radical-generating catalyst, is disclosed.

Abstract: An apparatus and process that makes use of spectral information in the mid-infrared range (400 to 4500 cm?1) to identify recyclable materials containing barrier polymers from recyclable materials not containing barrier polymers, which includes projecting light containing the mid-infrared (MIR) range onto materials to be analyzed, dispersing the MIR light that has reflected from or passed through the materials or both into various wavelengths, measuring the intensity of the MIR light at least one wavelength responsive to differences between the materials, measuring the intensity of the MIR light at least one wavelength not responsive to differences between the materials in order to provide a reference, and comparing the measurements in order to identify barrier materials from non-barrier materials.

Abstract: A system and method for simulating LCM mold filling utilizes at least one processor, suitable RAM and storage memory, input means, display means, and logic for simulating the injection of resin into a mold cavity containing a preform based upon mold cavity design parameters, mold filling processing parameters, physical property parameters, and system processing parameters, and identifying the current state of selected mold filling conditions at selected points in time during the simulated mold filling process. The system includes logic for identifying incipient dry spots, and also preferably includes means for interrupting the operation of the program at selected points to vary selected parameters to eliminate incipient dry spots and otherwise maximize the mold filling process.