1. A crystalline polyurethane thermoplastic material having the general formula I
7
where f is an integer ranging from 1 to 58; f is an integer ranging from 0 to 58; R and R are the same or different and stand for alkyl or aryl groups and X has the formula II
8
where R is an alkyl or aryl group, and n and n are integers the sum of which ranges from 42 to 220:
2. A method for the preparation of a crystalline polyurethane thermoplastic material of general formula I
9
where f is an integer ranging from 1 to 58; f is an integer ranging from 0 to 58; R and R are the same or different and stand for alkyl or aryl groups and X has formula II
10
where R is an alkyl or aryl group, and n and n are integers the sum of which ranges from 42 to 220, characterised in that it comprises reacting a polycaprolactone polymer of formula IIa
11
where R, n and n have the meaning given hereinbefore, with a diisocyanate of formula OCNRNCO where R and R have the meaning given hereinbefore.
3. The method according to claim 2, characterised in that a chain extender of formula HOROH is used in said reaction between the polycaprolactone polymer of formula IIa and said diisocyanate.
4. The method according to claim 3, characterised in that said extender is 1,4-butanediol.
5. The method according to at least one of claims 2 to 4, characterised in that said diisocyanate is diphenylmethane 4,4-diisocyanate, toluene 2,4- and 2,6-diisocyanate, dicyclo hexylmethane 4,4-diisocyanate or 3-isocyanomethyl-3,5,5-trimethylcyclohexyl isocyanate.
6. The method according to one of claims 2 to 5, characterised in that said reaction is conducted by mixing equimolecular amounts of diisocyanate with said chain extender and said polycaprolactone polymer of formula II, said last two compounds being present at a molar rate ranging from 01 to 11 respectively.
7. The method according to claim 6, characterised in that the mixing is continuous with a flow rate ranging from 200 to 1200 kgh of total component weight, and is performed in an extruder, at a temperature ranging from 150 to 350 C. and with a mean dwell time ranging from 45 seconds to 2.5 minutes.
8. The method according to one of claims 2 to 7, characterised in that said reaction is conducted in the presence of metal complex based catalysts proper to urethane reactions.
9. The method according to claim 8, characterised in that said metals are tin andor bismuth.
10. The method according to one of claims 2 to 9, characterised in that said polycaprolactone polymer of formula IIa
12
where R, n and n have the meaning given hereinbefore, has a molecular weight ranging from 5,000 to 25,000.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An information processing system comprising:
a computer having an application program capable of executing a data recovery program; and
a storage system, coupled to the computer, which receives a write request from the computer,
wherein the storage system comprises:
a storage controller processing the write request from the computer;
a first storage volume, coupled to the storage controller, which stores data related to the write request from the computer; and
a second storage volume, coupled to the storage controller, which stores a snapshot of the first storage volume at a point in time,
wherein the information processing system performs data recovery operation of the first storage volume by using the data recovery program and the snapshot,
wherein the information processing system stores state of data related to the application program at the corresponding time of the snapshot,
wherein the computer includes a file system, and
wherein said state of data has information on whether the data related to the application program at the corresponding time of the snapshot is consistent with the file system or not.
2. The information processing system of claim 1, wherein the information processing system designates the snapshot as being a consistent snapshot when a result of the data recovery operation indicates a successful recovery and the snapshot as being an inconsistent snapshot when the result of data recovery operation indicates an unsuccessful recovery.
3. The information processing system of claim 2, wherein the information processing system presents a user with information of the snapshot including whether the snapshot is consistent or inconsistent in response to a request from the user.
4. The information processing system of claim 1, wherein the snapshot is created under control of the computer.
5. The information processing system of claim 1, wherein the snapshot is created under control of the storage system.
6. The information processing system of claim 1, wherein the application software manages journal information for the data recovery operation.