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US 2019/0292300 A1Published application
Two-part curable urethane composition
AssigneeHitachi Chemical Company, Ltd.
InventorsKazuhiko MORI, Yuya HIRAMOTO, Hisao MATSUMIYA
Life of this patent
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Abstract
A two-part curable urethane composition comprising a main agent (A) and a curing agent (B), wherein the main agent (A) contains a urethane prepolymer (a), an isocyanurate-modified polyisocyanate compound (b), and a silane coupling agent (c) at a specified ratio by mass; and the curing agent (B) contains a polyether polyol (d), a polyether polyol having 4 or more hydroxy groups (e), and an amine catalyst (f) at a specified ratio by mass.
Claims8
1:
- A two-part curable urethane composition comprising a main agent (A) and a curing agent (B), wherein
- the main agent (A) contains a urethane prepolymer (a), an isocyanurate-modified polyisocyanate compound (b), and a silane coupling agent (c), and a content of the isocyanurate-modified polyisocyanate compound (b) is 0.5 to 5.0 parts by mass relative to 100 parts by mass of the urethane prepolymer (a) and a content of the silane coupling agent (c) is 0.5 to 5.0 parts by mass relative to 100 parts by mass of the urethane prepolymer (a), and
- the curing agent (B) contains a polyether polyol (d), a polyether polyol having 4 or more hydroxy groups (e), and an amine catalyst (f), and a content of the a polyether polyol having 4 or more hydroxy groups (e) is 1.0 to 5.0 parts by mass relative to 100 parts by mass of the polyether polyol (d) and a content of the amine catalyst (f) is 1.0 to 10.0 parts by mass relative to 100 parts by mass of the polyether polyol (d).
2:
- The two-part curable urethane composition according to claim 1, wherein the urethane prepolymer (a) is a reaction product of a polyether polyol (a-1) having a weight average molecular weight of 8000 or more and a diphenylmethane diisocyanate (a-2).
3:
- The two-part curable urethane composition according to claim 1, wherein at least one of the main agent (A) and the curing agent (B) contains a carbon black (g), and a total content of the carbon black (g) is 10 to 30 mass % relative to the total amount of the main agent (A) and the curing agent (B).
4:
- The two-part curable urethane composition according to claim 1, having an equivalent ratio of NCO/OH groups of 1.0 to 1.5 in the main agent (A) and the curing agent (B).
5:
- The two-part curable urethane composition according to claim 2, wherein at least one of the main agent (A) and the curing agent B) contains a carbon black (g), and a total content of the carbon black (g) is 10 to 30 mass % relative to the total amount of the main agent (A) and the curing agent (B).
6:
- The two-part curable urethane composition according to claim 2, having an equivalent ratio of NCO/OH groups of 1.0 to 1.5 in the main agent (A) and the curing agent (B).
7:
- The two-part curable urethane composition according to claim 3, having an equivalent ratio of NCO/OH groups of 1.0 to 1.5 in the main agent (A) and the curing agent (B).
8:
- The two-part curable urethane composition according to claim 5, having an equivalent ratio of NCO/OH groups of 1.0 to 1.5 in the main agent (A) and the curing agent (B).