Claims
- 1. A process for preparing polyether poly(N-substituted urethane) having a polyether unit of formula (1) and a urethane unit of formula (2), comprising:
(a) reacting a polyether polyurethane having a weight average molecular weight of 50,000 to 2,000,000 which polyurethane comprises a polyether unit and a urethane unit, with alkaline organic metal salt to produce polyether polyurethane metal salt; and (b) reacting the polyether polyurethane metal salt with an alkylating agent selected from tosylate and mesylate to substitute on N-position, 7wherein R is a hydrogen atom or alkyl; R1, R2 and R3 are optionally alkyl, aryl, alkylaryl or oligoethylene oxide derivatives and at least one of R1, R2 and R3 is oligoethylene oxide derivative; I is isocyanate; E is glycol having less than 400 of number average molecular weight or amine; m is an integer of 2-4; n is an integer of 1-60; and x is an integer of 1-5.
- 2. The process according to claim 1, wherein said polyether polyurethane has a weight average molecular weight of 100,000 to 200,000.
- 3. The process according to claim 1, wherein said alkaline organic metal salt is selected from the group consisting of potassium tert-butoxide (t-BuOK), lithium amide (LiNH2), sodium amide (NaNH2), lithium diethylamide (LiN(CH2CH3)2) and a mixture thereof.
- 4. The process according to claim 1, wherein the reaction of alkylation is performed by using a tosylate or mesylate of oligoethylene oxide derivatives of formula (3) and one selected from the group consisting of C1-C12 alkyl tosylate or alkyl mesylate, benzyl tosylate, 1-naphthyl tosylate, 9-anthryl tosylate, carboxymethyl tosylate and a mixture thereof,
- 5. The process according to claim 4, wherein said oligoethylene oxide derivatives of formula (3) is substituted with a crosslinkable functional group of tosyl, acryl, methacryl or vinyl.
- 6. The process according to claim 5, further comprising a crosslinking reaction using said crosslinkable functional group.
- 7. The process according to claim 6, wherein said crosslinking reaction is photo-crosslinking reaction, heat-initiating crosslinking reaction or substitution reaction in a solution.
Priority Claims (2)
Number |
Date |
Country |
Kind |
00-57810 |
Oct 2000 |
KR |
|
00-62811 |
Oct 2000 |
KR |
|
1. CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a divisional of application No. 09/968,734, filed Oct. 1, 2001, now allowed, which claims priority to Korean Application Nos. 00-57810, filed Oct. 2, 2000 and 00-62811, filed Oct. 25, 2000, the disclosure of each of which is incorporated by reference herein in its entirety.
Divisions (1)
|
Number |
Date |
Country |
Parent |
09968734 |
Oct 2001 |
US |
Child |
10714064 |
Nov 2003 |
US |