Patent US2331558A successfully refreshed from Google Patents.
EP0189672A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for producing a modified styrene polymer
Assignee: Tonen General Sekiyu KK
•
Filing: 1985-12-20
•
Granted: —
•
Expires: 2005-12-20
Abstract
Abstract This invention relates to a p-methyl styrene polymer represented by the following formula: Z denotes a group such as a functional group. Poly p-methylstyrene (PPMS) is lithiated by reaction with n-butyllithium. The lithiated PPMS is used to prepare polymers containing functional groups. As an example, a solution of PPMS (MW 260,000), 1.0 g in 20 ml of cyclohexane, was reacted with n-butyllithium, 8.5 mmol. and tetramethylethylenediamine, 8.7 mmol, for 20 hours to obtain a precipitate. The precipitate was dissolved in THF, and CO 2 was blown into the solution. The solution was washed with an aqueous solution of HCI and dropped into methanol to obtain a solid polymer having carboxyl group functionality.
Inventors
- 👤 Tadashi Niwa
- 👤 Masayuki Kato
- 👤 Yoshio Taguchi
- 👤 Chihiro Imai
- 👤 Tokuo Makishima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 14:39
CPC Classifications
C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
43 words
A process for producing a para-substituted styrene polymer which comprises reacting a paramethylstyrene polymer with an organic lithium compound and thereafter with a delithiuming reagent to produce a polymer having repeating units represented by the following formula: wherein Z denotes a substituting group.
Claim 2
Dependent Claim
43 words
A process for producing a para-substituted styrene polymer which comprises reacting a paramethylstyrene polymer with an organic lithium compound and thereafter with a delithiuming reagent to produce a polymer having repeating units represented by the following formula: wherein Z denotes a substituting group.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein said paramethylstyrene polymer is selected from the group consisting of polyparamethylstyrene, and random and block copolymers of polyparamethylstyrene.
Claim 4
Dependent Claim
32 words
The process of claim 2 wherein said random and block copolymers of polyparamethylstyrene comprise comonomers inert to said organic lithium compound, said comonomers selected from the group consisting of olefins, styrene and'siloxane.
Claim 5
Dependent Claim
28 words
The process of claim 1 wherein said organic lithium compound is represented by the formula RLi wherein R is an alkyl group having 1 to 12 carbon atoms.
Claim 6
Dependent Claim
23 words
The process of claim 4.wherein said alkyl group is selected from the group consisting of methyl, ethyl, butyl, pentyl, hexyl, octyl and dodecyl.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein said paramethylstyrene polymer is polyparamethylstyrene and said organic lithium compound is butyl lithium.
Claim 8
Dependent Claim
28 words
The process of claim 1 wherein the reaction of said paramethylstyrene polymer and said organic lithium compound is accomplished in a solvent inert to said organic lithium compound.
Claim 9
Dependent Claim
39 words
B. The process of claim 1 wherein Z is selected from a hydrogen atom, a C 1 -C 20 hydrocarbon group referred to as R, or groups containing a carbonyl group, a hydroxyl group, sulfur, boron, phosphorous and silicon.
Claim 10
Dependent Claim
20 words
The process of claim 8 wherein R is selected from the group consisting of alkyl, alkenyl, cycloalkyl, aryl and aralkyl.
Claim 11
Dependent Claim
17 words
The process of claim 8 wherein said carbonyl group is selected from -COOH, -CHO, -COR and -CONHR.
Claim 12
Dependent Claim
39 words
The process of claim 8 wherein said hydroxyl group is selected from the groups consisting of -CR I R 2 0H and -CH 2 CHOHR wherein R 1 , R 2 and R may be the same or different.
Claim 13
Dependent Claim
11 words
The process of claim 8 wherein said boron group is -B(OH)2.
Claim 14
Dependent Claim
22 words
The process of claim 8 wherein said sulfur group is selected from the group consisting of -SH, -SR and -S0 2 H.
Claim 15
Dependent Claim
13 words
The process of claim 8 wherein said phosphorous group is -PR 2 .
Claim 16
Dependent Claim
29 words
. The process of claim 8 wherein said silicon group is selected from the group consisting of -SiR 3 and -SiR 2 X, wherein X is a halogen atom.
Claim 17
Dependent Claim
214 words
The process of claim 1 wherein said delithiuming reagent, D, is selected such that if Z is hydrogen then D is H 2 0, if Z is R then D is RX, wherein X is a halogen atom, if Z is -COOH then D is C0 2 followed by a proton donor selected from the group consisting of water, acid and alcohol, if Z is -CHO then D is R 3 NCHO wherein R 3 is a lower alkyl group, if Z is -COR then D is RCN, if Z is -CONHR then D is RNCO, if Z is -CR 1 R 2 0H then D is if Z is -CH 2 CH 9 (OH)R then D is if Z is -B(OH) 2 then D is B(OR) 2 followed by a proton donor selected from the group consisting of water, acid and alcohol, if Z is -SH then D is sulfur, if Z is -SR then D is RSSR, if Z is -S0 2 H then D is S0 2 and HC1, if Z is -PR 2 then D is R 2 PCl, if Z is -SiR 3 then D is R 3 SiX wherein X is a halogen atom, if Z is -SiR 2 X then D is R 2 SiX 2 .
Claim 18
Dependent Claim
14 words
The process of claim 16 where said reaction is conducted in an inert medium.
Claim 19
Dependent Claim
19 words
The process of claim 17 wherein said inert medium is selected from the group consisting of hydrocarbons and ethers.
Claim 20
Dependent Claim
18 words
The process of claim 1 further comprising the additional activation of said organic lithium compound with an amine.
Claim 21
Dependent Claim
14 words
The process of claim 19 wherein said amine is selected from N,N,N',N'-tetramethylethylenediamine and tetramethylenediamine.
Claim 22
Dependent Claim
9 words
A composition produced by the process of claim 1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.