Curable Composition

Abstract

Firstly, disclosed is a curable composition which includes an organic polymer containing a crosslinkable silyl group, an ultraviolet ray absorbing agent having a triazine skeleton and a hindered amine based light stabilizer, and thereby, exhibits improved weather resistance both in a thin layer portion and in a thick layer portion. Secondly, disclosed is a curable composition which includes an organic polymer containing a crosslinkable silyl group, a (meth)acrylic polymer containing an epoxy group, a divalent tin organic carboxylate and an organic amine compound, and thereby, exhibits excellent weather resistance, anti-staining property, restoring property and durability. Thirdly, disclosed are an excellent curable composition which includes a reactive organic polymer containing at least one crosslinkable silyl group in one molecule thereof, a reactive organic polymer containing less than one crosslinkable silyl group in one molecule thereof, and thermally expandable hollow spheres as essential components, and thereby, exhibits economical productivity, good physical properties, safety and fire resistance; and a sealing material produced from the curable composition. Further, disclosed is a method for forming a fire-resistant structure with ease and at a low cost.

1 . A curable composition excellent in weather resistance, comprising:
 (A) an organic polymer containing a crosslinkable silyl group;   (B) an ultraviolet ray absorbing agent having a triazine skeleton; and   (C) a hindered amine based light stabilizer.   
   
   
       2 . A curable composition according to  claim 1 , wherein the component (A) comprises one or more kinds of compounds selected from the group consisting of a polyoxyalkylene based polymer containing a crosslinkable silyl group, a (meth)acrylic-modified polyoxyalkylene based polymer containing a crosslinkable silyl group, and a (meth)acrylic polymer containing a crosslinkable silyl group. 
   
   
       3 . A curable composition according to  claim 1 , wherein the component (A) comprises a (meth)acrylic polymer having a crosslinkable silyl group at a terminal of its molecular chain. 
   
   
       4 . A curable composition according to  claim 3 , wherein the component (A) comprises a (meth)acrylic polymer produced by a living radical polymerization method. 
   
   
       5 . A curable composition according to  claim 3 , wherein the component (A) comprises a (meth)acrylic polymer produced by an atom transfer radical polymerization method. 
   
   
       6 . A curable composition according to  claim 1 , wherein the component (A) comprises a mixture of a (meth)acrylic polymer having a crosslinkable silyl group at a terminal of its molecular chain and a polyoxyalkylene based polymer containing a crosslinkable silyl group. 
   
   
       7 . A curable composition according to  claim 1 , further comprising (D) a compound that reacts with water to produce an amine compound. 
   
   
       8 . A curable composition according to  claim 1 , wherein the component (C) comprises a hindered amine based compound having a triazine skeleton or a hindered amine based compound free of a triazine skeleton. 
   
   
       9 . A curable composition according to  claim 1 , wherein the component (C) comprises a mixture of a hindered amine based compound having a triazine skeleton and a hindered amine based compound free of a triazine skeleton. 
   
   
       10 . A sealing material excellent in weather resistance, comprising the curable composition according to  claim 1  as an available ingredient. 
   
   
       11 . A curable composition, comprising:
 (E) an organic polymer containing a crosslinkable silyl group;   (F) a (meth)acrylic polymer containing an epoxy group;   (G) a divalent tin organic carboxylate; and   (H) an organic amine compound.   
   
   
       12 . A curable composition according to  claim 11 , wherein the component (E) comprises a (meth)acrylic polymer having a crosslinkable silyl group at a terminal of its molecular chain. 
   
   
       13 . A curable composition according to  claim 12 , wherein the component (E) comprises a (meth)acrylic polymer produced by a living radical polymerization method. 
   
   
       14 . A curable composition according to  claim 12 , wherein the component (E) comprises a (meth)acrylic polymer produced by an atom transfer radical polymerization method. 
   
   
       15 . A curable composition according to  claim 11 , wherein the component (E) comprises a mixture of a (meth)acrylic polymer having a crosslinkable silyl group at a terminal of its molecular chain and a polyoxyalkylene based polymer containing a crosslinkable silyl group. 
   
   
       16 . A curable composition according to  claim 11 , wherein the component (F) has a weight average molecular weight of 1,000 or more to 7,500 or less. 
   
   
       17 . A sealing material, comprising the curable composition according to  claim 11  as an available ingredient. 
   
   
       18 . A curable composition having fire resistance, comprising:
 (I) a reactive organic polymer containing at least one crosslinkable silyl group in any one of its molecules;   (J) a reactive organic polymer containing less than one crosslinkable silyl group in any one of its molecules; and   (K) thermally expandable hollow spheres as essential components,   wherein the curable composition contains the component (K) in an amount of 0.01 part by weight or more to less than 20 parts by weight with respect to a total of 100 parts by weight of the components (I) and (J).   
   
   
       19 . A curable composition according to  claim 18 , wherein the component (I) comprises a (meth)acrylic polymer. 
   
   
       20 . A curable composition according to  claim 18 , wherein the component (I) comprises a (meth)acrylic polymer having a crosslinkable silyl group at a terminal of its molecular chain. 
   
   
       21 . A curable composition according to  claim 20 , wherein the component (I) comprises a (meth)acrylic polymer produced by a living radical polymerization method. 
   
   
       22 . A curable composition according to  claim 20 , wherein the component (I) comprises a (meth)acrylic polymer produced by an atom transfer radical polymerization method. 
   
   
       23 . A curable composition according to  claim 18 , wherein the component (I) comprises a mixture of a (meth)acrylic polymer having a crosslinkable silyl group at a terminal of its molecular chain and a polyoxyalkylene based polymer containing a crosslinkable silyl group. 
   
   
       24 . A curable composition according to  claim 18 , wherein the component (J) comprises a (meth)acrylic polymer. 
   
   
       25 . A curable composition according to  claim 18 , wherein the component (J) has a weight average molecular weight of 2,000 to 50,000. 
   
   
       26 . A curable composition according to  claim 18 , wherein the curable composition contains the component (J) in an amount of 10 to 300 parts by weight with respect to 100 parts by weight of the component (I). 
   
   
       27 . A curable composition according to  claim 18 , wherein the curable composition has a hardness of 40 or less after its curing. 
   
   
       28 . A sealing material having fire resistance, comprising the curable composition according to  claim 18  as an available ingredient. 
   
   
       29 . A method of forming a fire-resistant structure, comprising using a wall material having fire resistance and the sealing material having fire resistance according to  claim 28 .