Toughened urethane acrylate compositions
AssigneeDow Global Technologies LLC
InventorsHuifeng Qian, Rajat Duggal, Muhammad A. Shafi, Luigi Pellacani, Harshad M. Shah
Life of this patent
Estimating the term…
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.
Claims16
A resin composition comprising:
- a urethane (meth)acrylate produced from the reaction of at least one polyisocyanate, a combination of polyols comprising at least two polyalkylene glycols having different hydroxyl equivalent weights, and a compound comprising a nucleophilic group and a (meth)acrylate group, wherein the at least two polyols include a polyalkylene glycol having a hydroxyl equivalent weight of from 50 to 300 and a polyalkylene glycol having a hydroxyl equivalent weight of above 1,000;
- a reactive diluent;
- and
- a urethane (meth)acrylate toughener comprising at least one additional polyol having a number average molecular weight Mn from 1,000 g/mol to 15,000 g/mol,
- wherein the at least one additional polyol is present in an amount of from 1.0 wt % to 5.0 wt % based on a total weight of the curable resin composition.
A cured article comprising a composite, a coating, an adhesive, an ink, an encapsulation, or a casting prepared from a resin composition, the resin composition comprising:
- a urethane (meth)acrylate produced from the reaction of at least one polyisocyanate, a combination of polyols comprising at least two polyalkylene glycols having different hydroxyl equivalent weights, and a compound comprising a nucleophilic group and a (meth)acrylate group, wherein the at least two polyalkylene glycols include a polyalkylene glycol having an equivalent weight of from 50 to 300 and a polyalkylene glycol having a hydroxyl equivalent weight of above 1,000;
- a reactive diluent;
- and
- a urethane (meth)acrylate toughener comprising at least one additional polyol having a number average molecular weight Mn from 1,000 g/mol to 15,000 g/mol,
- wherein the at least one additional polyol is present in an amount of from 1.0 wt % to 5.0 wt % based on a total weight of the curable resin composition.
A method of preparing a resin composition, comprising:
- reacting a polyisocyanate, a combination of polyols comprising at least two polyalkylene glycols having different hydroxyl equivalent weights, and a compound containing both a nucleophilic group and a (meth)acrylate group to form urethane (meth)acrylate, wherein the at least two polyalkylene glycols include a polyalkylene glycol having a hydroxyl equivalent weight of from 50 to 300 and a polyalkylene glycol having a hydroxyl equivalent weight of above 1,000;
- and
- mixing a reactive diluent and a urethane (meth)acrylate toughener with the urethane (meth)acrylate to form the resin composition, wherein
- the urethane (meth)acrylate toughener comprises at least one additional polyol having a number average molecular weight Mn from 1,000 g/mol to 15,000 g/mol, and
- the at least one additional polyol is present in an amount of from 1.0 wt % to 5.0 wt % based on a total weight of the curable resin composition.
Dependencies are inferred from the claim text.