Polyurethane composition and molded article thereof

Abstract

A polyurethane composition containing a urethane compound prepared by reacting 100 parts by weight of a polyol with a polyisocyanate such that the NCO/OH equivalent weight ratio is greater than 0.5 but less than 15, and an epoxidation product of a dimmer of a linear olefin compound having 6 to 30 carbon atoms, wherein the content of the compound (B) per 100 parts by weight of the polyol is greater than 5 parts by weight but less than 400 parts by weight.

1 . A polyurethane composition comprising:
 (A) a urethane compound prepared by reacting 100 parts by weight of a polyol with a polyisocyanate such that the NCO/OH equivalent weight ratio is greater than 0.5 but less than 15, and   (B) an epoxidation product of a dimmer of a linear olefin compound having 6 to 30 carbon atoms,   wherein the content of said compound (B) per 100 parts by weight of said polyol is greater than 5 parts by weight but less than 400 parts by weight.   
   
   
       2 . The polyurethane composition according to  claim 1 , wherein the epoxidation product of a dimmer of a linear olefin compound having 6 to 30 carbon atoms (B) is selected from the group consisting of 2-butyl-hexyloxirane, 2-hexyl-2-octyloxirane, 2-decyl-2-octyloxirane, 2-decyl-2-dodecyloxirane, 2-dodecyl-2-tetradecyloxirane, and 2-hexadecyl-2-tetradecyloxirane. 
   
   
       3 . The polyurethane composition according to  claim 1 , wherein said polyol is selected from the group consisting of a polyether polyol, a polyester polyol, a polyolefin-based polyol, bisphenol A, and a rum ester of cator oil. 
   
   
       4 . The polyurethane composition according to  claim 1 , wherein said polyol is polypropylene glycol. 
   
   
       5 . The polyurethane composition according to  claim 1 , wherein said polyisocyanate is selected from the group consisting of an aromatic polyisocyanate, an aliphatic polyisocyanate, and an alicyclic polyisocyanate. 
   
   
       6 . The polyurethane composition according to  claim 1 , wherein said polyisocyanate is diphenyl methane diisocyanate (MDI). 
   
   
       7 . The polyurethane composition according to  claim 1 , wherein the content of said compound (B) per 100 parts by weight of said polyol is greater than 40 parts by weight but less than 150 parts by weight. 
   
   
       8 . The polyurethane composition according to  claim 1 , further comprising one or more additives selected from the group consisting of a plasticizer, a cure-promoting catalyst, a filler, a thixotropy agent, an adhesion-imparting agent, an antioxidant, and a colorant. 
   
   
       9 . The polyurethane composition according to  claim 8 , wherein said plasticizer is present in the polyurethane composition and is selected from the group consisting of 1-tetradecene, t-hexadecene, a dimer of 1-hexene, a dimer of 1-decene, a trimer of 1-decene, and a tetramer of 1-decene. 
   
   
       10 . The polyurethane composition according to  claim 8 , wherein said curing catalyst is present in the polyurethane composition and is dibutyl tin dilaurate. 
   
   
       11 . A molded article prepared by molding the polyurethane composition according to  claim 1 .