US5187244A
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Preparation process of block copolymers and resulting block copolymers
Assignee: Mitsubishi Chemical Corp
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Filing: 1989-07-19
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Granted: 1993-02-16
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Expires: 2009-07-19
Abstract
Abstract A preparation process of block copolymers which comprises conducting living polymerization of a (meth)acrylic ester substantially in the absence of water, by using a macromolecular compound having a functional end group represented by the formula (1): ##STR1## Wherein R is H or an n-alkyl group having from 1 to 3 carbon atoms and R' is H or an alkyl group having from 1 to 6 carbon atoms, as a polymerization initiator and in the presence of a Lewis acid or in the presence of a donor compound of an anion selected from HF 2 - , (CH 3 ) 3 SiF 2 - or F - , as well as novel block copolymers prepared therefrom are disclosed.
Inventors
- 👤 Masahiro Sugimori
- 👤 Haruko Takeda
- 👤 Seiji Tone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:12
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/442; C08F; C08F290/00; C08F290/02; C08F290/06; C08F290/068; C08F293/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
A process for preparing a block copolymer, which comprises conducting living polymerization of a (meth)acrylic ester substantially in the absence of water, by using a polydimethylsiloxane having a functional end group represented by the formula (1): ##STR11## wherein R is H or an n-alkyl group having from 1 to 3 carbon atoms and R' is H or an alkyl group having from 1 to 6 carbon atoms, as a polymerization initiator and in the presence of a Lewis acid or in the presence of a donor compound of an anion selected from the group consisting of HF 2 - , (CH 3 ) 3 SiF 2 - and F - .
Claim 2
Dependent Claim
111 words
A process for preparing a block copolymer, which comprises conducting living polymerization of a (meth)acrylic ester substantially in the absence of water, by using a polydimethylsiloxane having a functional end group represented by the formula (1): ##STR11## wherein R is H or an n-alkyl group having from 1 to 3 carbon atoms and R' is H or an alkyl group having from 1 to 6 carbon atoms, as a polymerization initiator and in the presence of a Lewis acid or in the presence of a donor compound of an anion selected from the group consisting of HF 2 - , (CH 3 ) 3 SiF 2 - and F - .
Claim 3
Dependent Claim
33 words
The process of claim 1 wherein the Lewis acid is one or more compounds selected from the group consisting of a zinc halide, a monoalkylaluminum halide, a dialkylaluminum halide and a dialkylaluminum oxide.
Claim 4
Dependent Claim
48 words
The process of claim 1 wherein the donor compound of said anion is one or more of TAS + HF 2 - , TAS(CH 3 ) 3 F 2 - and (C 4 H 9 ) 4 N + F - , wherein TAS is a trisdimethylsulfonium group.
Claim 5
Dependent Claim
19 words
The process of claim 1, wherein the polydimethylsiloxane has a number average molecular weight of from 400 to 100,000.
Claim 6
Dependent Claim
29 words
The process of claim 1, wherein the polydimethylsiloxane having a functional end group represented by the formula (1) has a number average molecular weight of from 1,000 to 30,000.
Claim 7
Dependent Claim
137 words
The process of claim 1, wherein the polydimethylsiloxane is a compound having the formula (2) or the formula (3): ##STR12## wherein R is H or an n-alkyl group having from 1 to 3 carbon atoms, R' is H or an alkyl group having from 1 to 6 carbon atoms; n is an integer of 5 or more; X is a dimethylsiloxy unit; Y is an end group which is chemically non-reactive with the polymerizing methacrylic ester; and Z is a single bond, a polymethylene group having 5 or less carbon atoms which is unsubstituted or substituted by a methyl side chain, --(W--O) m -- or W--O--W, wherein W is a polyethylene group having 5 or less carbon atoms, which is unsubstituted or substituted by a methyl side chain, and m is an integer of 1 to 5.
Claim 8
Dependent Claim
21 words
The process of claim 1 wherein the polymerization of two or more different (meth)acrylic esters is conducted in succesive separate steps.
Claim 9
Dependent Claim
11 words
The process of claim 1, wherein R' is a methyl group.
Claim 10
Dependent Claim
24 words
The process of claim 1, wherein said process is carried out at a temperature in the range of from -100° C. to 100° C.
Claim 11
Dependent Claim
24 words
The process of claim 9, wherein said process is carried out at a temperature in the range of from -75° C. to 60° C.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-02-16 | 1996-08-17 | 1997-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-16 | 2000-08-17 | 2001-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-16 | 2004-08-17 | 2005-02-16 | $7700.00 | Window Closed / Lapsed |