Dow Global Technolgoies LLC

Luigi Pellacani

Huifeng Qian

Muhammad A Shafi

Harshad M Shah

Dwight D Latham

Qiuyun Xu

William L Heaner, Iv

Rajat Duggal

Paolo Golini

Maurizio Guandalini

Francesca Pignagnoli

Emanuele Maiocchi

Peter Keller

William L Heaner Iv

Robert Davidson

Andrea B Benvenuti

Elisa C Corinti

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 (K) value from 1 MPa*mto 3 MPa*mwhen measured in accordance with ASTM D5045. Processes for making the resin composition as well as processes using the resin composition are also provided.

Toughened urethane acrylate compositions

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.

Styrene-free reactive diluents for urethane acrylate resin compositions

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.

Controllable-cure urethane acrylate resin compositions and methods of making same

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.

Process for making urethane acrylates

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Carpi, Italy

Luigi Pellacani