Aqueous resin crosslinking agent, aqueous resin crosslinking agent-containing liquid, and aqueous resin composition
AssigneeNisshinbo Chemical Inc.
InventorNami Tsukamoto
Life of this patent
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Abstract
A waterborne resin crosslinking agent containing a predetermined polycarbodiimide compound (A) having an oxyalkylene group, a predetermined polycarbodiimide compound (B), and a surfactant (C), each polycarbodiimide compound has a structure in which an isocyanate group is capped with a predetermined end-capping compound at each of both terminals, a total content of the oxyalkylene group in (A) is 15% by mass or more, a total content of the oxyalkylene group in (A) and (B) based on a total amount of (A) and (B) is 10% by mass or less, and a content of (C) is 0.1 to 20 parts by mass based on a total content of (A) and (B) of 100 parts by mass.
Claims16
A waterborne resin crosslinking agent comprising at least one polycarbodiimide compound (A) selected from the group consisting of a polycarbodiimide compound (A1) and a polycarbodiimide compound (A2), a polycarbodiimide compound (B), and a surfactant (C), wherein the polycarbodiimide compound (A1) has a structure in which an isocyanate group is capped with an end-capping compound (T1) represented by the following general formula (1) at each one of a first and a second terminal of the polycarbodiimide compound (A1),
- the polycarbodiimide compound (A2) has a structure in which an isocyanate group is capped with the end-capping compound (T1) at a first terminal of the polycarbodiimide compound (A2), and has a structure in which an isocyanate group is capped with an end-capping compound (T2) at a second terminal of the polycarbodiimide compound (A2),
- the polycarbodiimide compound (B) has a structure in which an isocyanate group is capped with an end-capping compound (T3) at a first terminal of the polycarbodiimide compound (B), and has a structure in which an isocyanate group is end-capped with an end-capping compound (T4) at a second terminal of the polycarbodiimide compound (B):
- R1(OCHR2CH2)nOH (1)
- wherein R1 is an alkyl group having 1 to 4 carbon atoms;
- R2 is a hydrogen atom or a methyl group;
- n is an integer of 7 to 30;
- and the end-capping compound (T1) capping the first terminal of the polycarbodiimide compound (A1) and the end-capping compound (T1) capping the second terminal thereof, and the end-capping compound (T1) capping the first terminal of the polycarbodiimide compound (A2) may be the same or different from each other,
- the end-capping compounds (T2), (T3), and (T4) are each independently a compound having one amino group, isocyanate group, epoxy group, or carboxy group, or a compound having one hydroxyl group other than the end-capping compound (T1),
- a total content of an oxyalkylene group (OCHR2CH2) in the polycarbodiimide compound (A) is 15% by mass or more,
- a total content of an oxyalkylene group in the polycarbodiimide compounds (A) and (B) based on a total amount of the polycarbodiimide compounds (A) and (B) is 0.3 to 1.2% by mass,
- a content of the surfactant (C) is 0.1 to 20 parts by mass based on a total content of the polycarbodiimide compounds (A) and (B) of 100 parts by mass, and
- a content of the polycarbodiimide (A) is 1 to 3 parts by mass based on a total content of the polycarbodiimide compounds (A) and (B) of 100 parts by mass.
A waterborne resin composition comprising the waterborne resin crosslinking agent and a waterborne resin,
- the waterborne resin crosslinking agent comprising at least one polycarbodiimide compound (A) selected from the group consisting of a polycarbodiimide compound (A1) and a polycarbodiimide compound (A2), a polycarbodiimide compound (B), and a surfactant (C), wherein the polycarbodiimide compound (A1) has a structure in which an isocyanate group is capped with an end-capping compound (T1) represented by the following general formula (1) at each one of a first and a second terminal of the polycarbodiimide compound (A1),
- the polycarbodiimide compound (A2) has a structure in which an isocyanate group is capped with the end-capping compound (T1) at a first terminal of the polycarbodiimide compound (A2), and has a structure in which an isocyanate group is capped with an end-capping compound (T2) at a second terminal of the polycarbodiimide compound (A2),
- the polycarbodiimide compound (B) has a structure in which an isocyanate group is capped with an end-capping compound (T3) at a first terminal of the polycarbodiimide compound (B), and has a structure in which an isocyanate group is end-capped with an end-capping compound (T4) at a second terminal of the polycarbodiimide compound (B):
- R1(OCHR2CH2)nOH (1)
- wherein R1 is an alkyl group having 1 to 4 carbon atoms;
- R2 is a hydrogen atom or a methyl group;
- n is an integer of 7 to 30;
- and the end-capping compound (T1) capping the first terminal of the polycarbodiimide compound (A1) and the end-capping compound (T1) capping the second terminal thereof, and the end-capping compound (T1) capping the first terminal of the polycarbodiimide compound (A2) may be the same or different from each other,
- the end-capping compounds (T2), (T3), and (T4) are each independently a compound having one amino group, isocyanate group, epoxy group, or carboxy group, or a compound having one hydroxyl group other than the end-capping compound (T1),
- a total content of an oxyalkylene group (OCHR2CH2) in the polycarbodiimide compound (A) is 15% by mass or more,
- a total content of an oxyalkylene group in the polycarbodiimide compounds (A) and (B) based on a total amount of the polycarbodiimide compounds (A) and (B) is 0.3 to 1.2% by mass,
- a content of the surfactant (C) is 0.1 to 20 parts by mass based on a total content of the polycarbodiimide compounds (A) and (B) of 100 parts by mass, and
- a content of the polycarbodiimide (A) is 1 to 3 parts by mass based on a total content of the polycarbodiimide compounds (A) and (B) of 100 parts by mass.
Dependencies are inferred from the claim text.