Redox curing-type nonaqueous curable composition

1. A biological hard tissue adhesive comprising a composition comprising:

at least one liquid monomer (a);

an organic peroxide (b); and

a sulfite (c) having an average particle diameter of from 0.01 to 100 μm as a reducing agent,

wherein

the composition is dividedly packed as a first agent comprising said liquid monomer (a) and said organic peroxide (b) and a second agent comprising said at least one liquid monomer (a) and said sulfite (c) which is dispersed in the liquid monomer (a) of the second agent in the form of a solid,

when the first agent and the second agent are in a mixed state so as to form a bulk composition, said sulfite (c) is dispersed in liquid monomer (a) in the form of a solid in the bulk composition,

the reducing agent in the second agent consists of the sulfite (c),

the composition does not contain water, and

the composition does not contain: i) a polymeric monomer having at least one phosphoric acid group; or ii) a polymeric monomer represented by formula (I)

where R 1 is hydrogen or a methyl group, R 2 is a (1+n)-valent group with a carbon number of 2 to 40, l is an integer of 1 to 5, m is 0 or 1, n is an integer of 1 to 4, —X— is —O— or —NH—, —Y— is —O— or —S—, and Z 1 , Z 2 and Z 3 are independently an oxygen atom or a sulfur atom.

2. The biological hard tissue adhesive according to claim 1 ,

wherein said organic peroxide is selected from the group consisting of benzoyl peroxide; 2,4-dichlorobenzoyl peroxide; m-toluoyl peroxide; t-butyl peroxybenzoate; bis-t-butyl peroxyisophthalate; 2,5-dimethyl-2,5-bis(benzoylperoxy)hexane; t-butyl peroxy-2-ethyl hexanoate; t-butyl peroxyisopropyl carbonate; dicumyl peroxide; di-t-butyl peroxide; lauroyl peroxide; 1,1-bis(t-butyl peroxy)3,3,5-trimethyl cyclohexane; 1,1-bis(t-butyl peroxy)cyclohexane; 1,1-bis(t-hexyl peroxy)cyclohexane; methyl ethyl ketone peroxide; cyclohexanone peroxide; methyl acetoacetate peroxide; t-butyl hydroperoxide; cumene hydroperoxide; and p-diisopropyl benzene peroxide.

3. The biological hard tissue adhesive according to claim 1 , wherein said sulfite (c) is a compound having a solubility in water of 1 mg/100 mL or more.

4. The biological hard tissue adhesive according to claim 1 , wherein said sulfite (c) is selected from the group consisting of sodium sulfite; potassium sulfite; calcium sulfite; ammonium sulfite; sodium hydrogensulfite; and potassium hydrogensulfite.

5. The biological hard tissue adhesive according to claim 1 , wherein said at least one liquid monomer (a) is at least one member selected from the group consisting of methyl (meth)acrylate; ethyl (meth)acrylate; propyl (meth)acrylate; isopropyl (meth)acrylate; butyl (meth)acrylate; isobutyl (meth)acrylate; benzyl (meth)acrylate; lauryl (meth)acrylate; 2,3-dibromopropyl (meth)acrylate; 2-hydroxyethyl (meth)acrylate; 2-hydroxypropyl (meth)acrylate; 3-hydroxypropyl (meth)acrylate; 1,3-dihydroxypropyl (meth)acrylate; 2,3-dihydroxypropyl (meth)acrylate; 2-hydroxyethyl (meth)acrylamide; 3-methacryloyloxypropyl trimethoxysilane; 11-methacryloyloxyundecyl trimethoxysilane; (meth)acrylamide; ethylene glycol di(meth)acrylate; triethylene glycol di(meth)acrylate; propylene glycol di(meth)acrylate; polyethylene glycol di(meth)acrylate having nine or more oxyethylene groups; neopentyl glycol di(meth)acrylate; 1,6-hexanediol di(meth)acrylate; 1,10-decanediol di(meth)acrylate; dipentaerythritol di(meth)acrylate; bisphenol A diglycidyl (meth)acrylate; 2,2-bis[4-(meth)acryloyloxyethoxyphenyl]propane; 2,2-bis[4-(meth)acryloyloxypolyethoxyphenyl]propane; 2,2-bis[4-[3-(meth)acryloyloxy-2-hydroxypropoxy]phenyl]propane; 1,2-bis[3-(meth)acryloyloxy-2-hydropropoxy]ethane; pentaerythritol di(meth)acrylate; 1,2-bis(3-methacryloyloxy-2-hydroxypropoxy)ethane; [2,2,4-trimethylhexamethylene bis(2-carbamoyloxyethyl)] dimethacrylate; 1,3-di(meth)acryloyloxy-2-hydroxypropane; trimethylolpropane tri(meth)acrylate; trimethylolethane tri(meth)acrylate; tetramethylolmethane tri(meth)acrylate; pentaerythritol tetra(meth)acrylate; N,N′ -(2,2,4-trimethylhexamethylene) bis [2-(aminocarboxy)propane- 1,3 -diol] tetramethacrylate; and 1,7-diacryloyloxy-2,2,6,6-tetraacryloyloxymethyl-4-oxyheptane.

6. The biological hard tissue adhesive according to claim 1 , wherein the composition comprises

100 parts by weight of said at least one liquid monomer (a);

0.05 to 10 parts by weight of said organic peroxide (b); and

0.01 to 15 parts by weight of said sulfite (c).

7. A composition comprising:

100 parts by weight of a liquid monomer (a) that consists of at least one member selected from the group consisting of 2,2-bis[4-(3-methacryloyloxy-2-hydroxypropoxy)phenyl] propane, triethylene glycol dimethacrylate, neopentyl glycol dimethacrylate, and 2-hydroxyethyl methacrylate;

0.05 to 10 parts by weight of an organic peroxide (b) that comprises benzoyl peroxide; and

0.01 to 15 parts by weight of a sulfite (c) having an average particle diameter of from 6.1 to 9.9 μm as a reducing agent,

wherein

the sulfite (c) present in the bulk of the composition is present in the form of a solid dispersed in the liquid monomer (a),

the sulfite (c) present at an interface between the composition and the dentin is present in solvated form and solvated by water from the dentin,

the bulk of the composition does not contain water,

the reducing agent in the liquid monomer (a) consists of the sulfite (c),

the polymer obtained from polymerizing said liquid monomer (a) is a polymer having units of 2,2-bis[4-(3-methacryloyloxy-2-hydroxypropoxy)phenyl] propane, triethylene glycol dimethacrylate, neopentyl glycol dimethacrylate, 2-hydroxyethyl methacrylate, or a combination thereof,

the bonding strength between the composition and dentin, when the composition is present on and bound to dentin, is from 12.0 to 17.9 MPa, and

the composition does not contain: i) a polymeric monomer having at least one phosphoric acid group; or ii) a polymeric monomer represented by formula (I)

where R 1 is hydrogen or a methyl group, R 2 is a (1+n)-valent group with a carbon number of 2 to 40, l is an integer of 1 to 5, m is 0 or 1, n is an integer of 1 to 4, —X— is —O— or —NH—, —Y— is —O— or —S—, and Z 1 , Z 2 and Z 3 are independently an oxygen atom or a sulfur atom.

8. A composition according to claim 7 , wherein the composition is in a cured state.

9. A composition according to claim 7 , wherein said liquid monomer (a) comprises 2,2-bis[4-(3-methacryloyloxy-2-hydroxypropoxy)phenyl] propane.

10. A composition according to claim 7 , wherein said liquid monomer (a) comprises triethylene glycol dimethacrylate.

11. A composition according to claim 7 , wherein said liquid monomer (a) comprises neopentyl glycol dimethacrylate.

12. A composition according to claim 7 , wherein said liquid monomer (a) comprises 2-hydroxyethyl methacrylate.

13. A biological hard tissue adhesive composition, comprising:

100 parts by weight of a liquid monomer (a) that comprises at least one member selected from the group consisting of 2,2-bis[4-(3-methacryloyloxy-2-hydroxypropoxy)phenyl] propane, triethylene glycol dimethacrylate, neopentyl glycol dimethacrylate, and 2-hydroxyethyl methacrylate;

0.05 to 10 parts by weight of benzoyl peroxide; and

0.01 to 15 parts by weight of a sulfite (c) having an average particle diameter of from 6.1 to 9.9 μm as a reducing agent, wherein

said liquid monomer (a) has a bulk portion and a perimeter portion where water is present in said perimeter portion, said bulk portion does not contain water

said sulfite comprises at least one member selected from the group consisting of sodium sulfite; potassium sulfite; calcium sulfite; ammonium sulfite; sodium hydrogensulfite; and potassium hydrogensulfite,

said reducing agent of the composition consists of sulfite (c),

said sulfite is present in said bulk portion in the disperse phase,

said sulfite is present in said perimeter portion in dissolved form and dissolved by said water present in said perimeter portion, and

the composition does not contain: i) a polymeric monomer having at least one phosphoric acid group; or ii) a polymeric monomer represented by formula (I)

where R 1 is hydrogen or a methyl group, R 2 is a (1+n)-valent group with a carbon number of 2 to 40, l is an integer of 1 to 5, m is 0 or 1, n is an integer of 1 to 4, —X— is —O— or —NH—, —Y— is —O— or —S—, and Z 1 , Z 2 and Z 3 are independently an oxygen atom or a sulfur atom.

14. The biological hard tissue adhesive composition according to claim 13 , wherein said sulfite comprises one of sodium sulfite and potassium sulfite.

15. The biological hard tissue adhesive composition according to claim 13 , wherein said liquid monomer (a) comprises a mixture of 2,2-bis[4-(3-methacryloyloxy-2-hydroxypropoxy)phenyl] propane, triethylene glycol dimethacrylate, and 2-hydroxyethyl methacrylate.

16. A biological hard tissue adhesive comprising a composition comprising:

at least one liquid monomer (a);

an organic peroxide (b); and

a sulfite (c) having an average particle diameter of from 0.01 to 100 μm,

wherein

the composition is dividedly packed as a first agent comprising said liquid monomer (a) and said organic peroxide (b) and a second agent comprising said at least one liquid monomer (a) and said sulfite (c) which is dispersed in the liquid monomer (a) of the second agent in the form of a solid,

when the first agent and the second agent are in a mixed state so as to form a bulk composition, said sulfite (c) is dispersed in liquid monomer (a) in the form of a solid in the bulk composition,

the composition does not contain water, and

which does not contain a polymeric monomer represented by formula (I)

where R 1 is hydrogen or a methyl group, R 2 is a (1+n)-valent group with a carbon number of 2 to 40, l is an integer of 1 to 5, m is 0 or 1, n is an integer of 1 to 4, —X— is —O— or —NH—, —Y— is —O— or —S—, and Z 1 , Z 2 and Z 3 are independently an oxygen atom or a sulfur atom.