Thermoplastic polyhydroxy polyether resin and resin composition comprising the same

1. A flame-retardant thermoplastic polyhydroxy polyether resin, wherein the flame-retardant thermoplastic polyhydroxy polyether resin is obtained by reacting at least one epoxy resin (A) selected from glycidyl esters of divalent aliphatic carboxylic acids having 15 to 64 carbon atoms or glycidyl ethers of divalent aliphatic alcohols having 15 to 64 carbon atoms with a phosphorus atom-containing divalent phenol compound (B) at a phenol group equivalent of 0.9 to 1.1 with respect to an epoxy group equivalent of 1, wherein the amount of the component (A) is 2 to 52 mol % with respect to the whole resin, the weight average molecular weight thereof is 10,000 to 200,000, and the phosphorus content thereof is 1 to 5 wt %, and elongation thereof is 15% to 120%.

2. The thermoplastic polyhydroxy polyether resin according to claim 1 , wherein the phosphorus atom-containing divalent phenol compound is at least one phosphorus atom-containing divalent phenol compound selected from organic phosphorus compounds represented by the general formula (1) or the general formula (2):

(in the formula, R 1 and R 2 each independently is a C1 to C12 aliphatic hydrocarbon group, an aryl group or a substituted aryl group or R 1 and R 2 bond together to form a cyclic structure, in the formula, R 3 is a C1 to C6 hydrocarbon group, q represents an integer of 0 to 3, and n represents an integer of 0 or 1)

(in the formula, R 4 and R 5 each independently is a C1 to C12 aliphatic hydrocarbon group, an aryl group or a substituted aryl group or R 4 and R 5 bond together to form a cyclic structure, in the formula, R 6 is a C1 to C6 hydrocarbon group, r represents an integer of 0 to 5, and m represents an integer of 0 or 1).

3. The thermoplastic polyhydroxy polyether resin according to claim 1 , wherein the divalent aliphatic carboxylic acid having 15 to 64 carbon atoms is at least one divalent aliphatic carboxylic acid selected from dimer acids or hydrogenated dimer acids.

4. The thermoplastic polyhydroxy polyether resin according to claim 1 , wherein the divalent aliphatic alcohol having 15 to 64 carbon atoms is at least one divalent aliphatic alcohol selected from dimer diols or hydrogenated dimer diols.

5. A resin composition comprising the thermoplastic polyhydroxy polyether resin according to claim 1 , a thermocurable resin and a curing agent as essential components.

6. The resin composition according to claim 5 , wherein the thermocurable resin is an epoxy resin.

7. The resin composition according to claim 5 , further comprising a polyester type, polyvinyl butyral type, acrylic type or polyamide type thermoplastic polymeric substance and/or a rubber component.

8. An adhesive film comprising a support base film having formed thereon an insulating film made of the thermoplastic polyhydroxy polyether resin according to claim 1 and a thin film.

9. A copper foil with a resin for a printed circuit board and a copper foil with a resin for a flexible printed circuit board comprising a copper foil having coated thereon the thermoplastic polyhydroxy polyether resin according to claim 1 .

10. A prepreg comprising a reinforcing material in the form of a sheet comprised of a fiber having coated thereon and/or immersed in the thermoplastic polyhydroxy polyether resin according to claim 1 .

11. An electrolaminate and a flexible electrolaminate obtained from the thermoplastic polyhydroxy polyether resin according to claim 1 .

12. An adhesive film comprising a support base film having formed thereon an insulating film made of the resin composition according to claim 5 and a thin film.

13. A copper foil with a resin for a printed circuit board and a copper foil with a resin for a flexible printed circuit board comprising a copper foil having coated thereon the resin composition according to claim 5 .

14. A prepreg comprising a reinforcing material in the form of a sheet comprised of a fiber having coated thereon and/or immersed in the resin composition according to claim 5 .

15. An electrolaminate and a flexible electrolaminate obtained from the resin composition according to claim 5 .

16. An electrolaminate and a flexible electrolaminate obtained from the insulating film according to claim 8 .

17. An electrolaminate and a flexible electrolaminate obtained from the copper foil with a resin for a printed circuit board according to claim 9 .

18. An electrolaminate and a flexible electrolaminate obtained from the prepreg according to claim 10 .