Polymer, process for producing the polymer, and curable composition containing the polymer

1. An allyl-terminated polymer as produced by reacting a hydroxy-terminated polymer with an allyl halide,

wherein the hydroxyl-terminated polymer has, at a molecular chain terminus, a structure represented by the general formula 1:

wherein R 3 is a hydroxyl group,

R 1 is a divalent hydrocarbon group containing 1 to 20 carbon atoms or a group having a structure represented by the general formula 3:

in which R 5 is an oxygen atom, a nitrogen atom or an organic group containing 1 to 20 carbon atoms, R 6 is a hydrogen atom or a methyl group and each may be the same or different,

and R 2 is a hydrogen atom or a methyl group and X is a halogen atom, a nitroxide or sulfide group or a cobalt porphyrin complex.

2. A crosslinkable silyl-terminated polymer as produced by reacting an alkenyl-terminated polymer with a crosslinkable silyl-containing hydrosilyl compound,

wherein the alkenyl-terminated polymer has, at a molecular chain terminus, a structure represented by the general formula 1:

wherein R 3 is a group represented by the general formula 2:

in which R 4 represents a hydrogen atom or a methyl group, R 1 is —(CH2) n —, —CH(CH 3 )—, —CH(CH 2 CH 3 )—, —C(CH 3 ) 2 —, —C(CH 3 )(CH 2 CH 3 )—, —C(CH 2 CH 3 ) 2 — or —CH 2 CH(CH 3 )—, wherein n is an integer of 1 to 20,

and R 2 is a hydrogen atom or a methyl group and X is a halogen atom, a nitroxide or sulfide group or a cobalt porphyrin complex.

3. A crosslinkable silyl-terminated polymer as produced by reacting a hydroxy- or amino-terminated polymer with a compound having a crosslinkable silyl group and a functional group capable of reacting with the hydroxy or amino group,

wherein the hydroxyl- or amino-terminated polymer has, at a molecular chain terminus, a structure represented by the general formula 1:

wherein R 3 is a hydroxyl or amino group,

R 1 is a divalent hydrocarbon group containing 1 to 20 carbon atoms or a group having a structure represented by the general formula 3:

in which R 5 is an oxygen atom, a nitrogen atom or an organic group containing 1 to 20 carbon atoms, R 6 is a hydrogen atom or a methyl group and each may be the same or different,

and R 2 is a hydrogen atom or a methyl group and X is a halogen atom, a nitroxide or sulfide group or a cobalt porphyrin complex.

4. An epoxy-terminated polymer as produced by reacting a hydroxy-terminated polymer with epichlorohydrin,

wherein the hydroxyl-terminated polymer has, at a molecular chain terminus, a structure represented by the general formula 1:

wherein R 3 is a hydroxyl group,

R 1 is a divalent hydrocarbon group containing 1 to 20 carbon atoms or a group having a structure represented by the general formula 3:

in which R 5 is an oxygen atom, a nitrogen atom or an organic group containing 1 to 20 carbon atoms, R 6 is a hydrogen atom or a methyl group and each may be the same or different,

and R 2 is a hydrogen atom or a methyl group and X is a halogen atom, a nitroxide or sulfide group or a cobalt porphyrin complex.

5. A curable composition which comprises (A) an alkenyl-terminated polymer and (B) a compound having at least two hydrosilyl groups,

wherein the alkenyl-terminated polymer has, at a molecular chain terminus, a structure represented by the general formula 1:

wherein R 3 is a group represented by the general formula 2:

in which R 4 represents a hydrogen atom or a methyl group,

R 1 is —CH 2 ) n —, —CH(CH 3 )—, —CH(CH 2 CH 3 )—, —C(CH 3 ) 2 —, —C(CH 3 ) (CH 2 CH 3 )—, —C(CH 2 CH 3 ) 2 — or —CH 2 CH(CH 3 )—, wherein n is an integer of 1 to 20,

and R 2 is a hydrogen atom or a methyl group and X is a halogen atom, a nitroxide or sulfide group or a cobalt porphyrin complex.

6. A curable composition which comprises (A) a hydroxyl- or amino-terminated polymer and (B) a compound having at least two functional groups capable of reacting with the hydroxyl or amino group,

wherein the hydroxyl- or amino-terminated polymer has, at a molecular chain terminus, a structure represented by the general formula 1:

wherein R 3 is a hydroxyl or amino group,

R 1 is a divalent hydrocarbon group containing 1 to 20 carbon atoms or a group having a structure represented by the general formula 3:

in which R 5 is an oxygen atom, a nitrogen atom or an organic group containing 1 to 20 carbon atoms, R 6 is a hydrogen atom or a methyl group and each may be the same or different,

and R 2 is a hydrogen atom or a methyl group and X is a halogen atom, a nitroxide or sulfide group or a cobalt porphyrin complex.

7. The curable composition according to claim 6 , wherein the component (B) is a polyvalent isocyanate.

8. A curable composition which comprises a crosslinkable silyl-terminated polymer produced according to claim 2 as a main component.

9. A curable composition which comprises a crosslinkable silyl-terminated polymer according to claim 3 as a main component.

10. A curable composition which comprises (A) an epoxy-terminated polymer according to claim 4 and (B) a curing agent for epoxy resins.