One-pack moisture-curing composition

1. A one-pack moisture-curing composition comprising:

a preliminary composition comprising a urethane prepolymer having isocyanate groups at terminals and carbon black, the urethane prepolymer being obtained by reacting a polyisocyanete including 4,4 diphenylmethane diisocyanate with a polyol including polypropylene ether triol and a polypropylene ether diol, so that isocyanate groups are in excess relative to hydroxy groups;

an adhesiveness-imparting agent containing at least one or both selected from the group consisting of a compound (A) obtained by reacting hexamethylene diisocyanate and trimethylolpropane or glycerin so that an equivalent ratio of isocyanate groups to hydroxyl groups is from 1.8 to 2.2 and a compound (B), which is a biuret form or isocyanurate form of diisocyanate;

a first catalyst containing at least one or both selected from the group consisting of a compound (C) obtained by reacting 1,3-diacetoxy-1,1,3,3-tetrabutyldistannoxane and ethyl silicate at a molar ratio within a range of from 1:0.8 to 1:1.2 and dibutyltin bis(pentadione); and

a second catalyst containing dimorpholinodiethylether;

wherein:

a content of the compound (A) is A parts by mass, a content of the compound (B) is B parts by mass, a content of the compound (C) is C parts by mass, a content of dibutyltin bis(pentadione) is D parts by mass, and a content of dimorpholinodiethylether is E parts by mass, and

the following Formulas (1) to (3) are satisfied with respect to 100 parts by mass of the preliminary composition:

0.1≦( A+B )≦5  (1);

0.001≦( C+D )≦0.5  (2); and

0.01≦E≦2  (3);

wherein the second catalyst further contains N,N-dimethylaminoethylmorpholine;

a content of N,N-dimethylamino ethylmorpholine is F parts by mass; and the following Formula (4) to (6) is satisfied with respect to 100 parts by mass of the preliminary composition:

F≦2  (4);

F≦E  (5); and

0.3≦( E+F )≦2  (6).

2. The one-pack moisture-curing composition according to claim 1 , wherein the preliminary composition consists essentially of the urethane prepolymer and the carbon black.

3. The one-pack moisture-curing composition according to claim 1 , wherein the adhesiveness-imparting agent and the first and second catalysts are not a part of the preliminary composition.

4. The one-pack moisture-curing composition according to claim 1 , wherein A>0.

5. The one-pack moisture-curing composition according to claim 1 , wherein B=0.

6. The one-pack moisture-curing composition according to claim 1 , wherein A>0 and B>0.

7. The one-pack moisture-curing composition according to claim 1 , wherein C>0.

8. The one-pack moisture-curing composition according to claim 1 , wherein D=0.

9. The one-pack moisture-curing composition according to claim 1 , wherein C>0 and D>0.

10. The one-pack moisture-curing composition according to claim 1 , wherein a equivalent ratio of the polyol to polyisocyanate used to produce the urethane prepolymer is such that the equivalent ratio (NCO groups/OH groups) of isocyanate groups in the polyisocyanate to the hydroxy groups in the polyol is from 1.2 to 2.2.

11. The one-pack moisture-curing composition according to claim 1 , wherein a number average molecular weight of the urethane prepolymer is at least 2,000.

12. The one-pack moisture-curing composition according to claim 1 , wherein the polyisocyanete is 4,4 diphenylmethane diisocyanate.

13. The one-pack moisture-curing composition according to claim 1 , wherein the polyol is polypropylene ether triol and a polypropylene ether diol.

14. The one-pack moisture-curing composition according to claim 1 , wherein F≦2E.

15. The one-pack moisture-curing composition according to claim 1 , wherein when the adhesiveness-imparting agent contains both of the compound (A) and the compound (B), a relationship of the content of the compound (A) as A parts by mass and the content of the compound (B) as B parts by mass is represented by A=B.

16. The one-pack moisture-curing composition according to claim 1 , wherein C>0, C≦0.01A and C≦0.01B.