EP0200530A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for preparing methacrylimide-containing polymers
Assignee: Mitsubishi Chemical Corp
•
Filing: 1986-04-29
•
Granted: —
•
Expires: 2006-04-29
Abstract
Abstract Methacrylimide-containing polymers are continuously produced by introducing 10 to 60 wt.% of an inert solvent, 90 to 40 wt.% of methacrylic acid, a methacrylic acid ester or a monomer mixture comprising at least 50 wt.% of methacrylic acid or a methacrylic acid ester, and a radical polymerization initiator and a molecular weight modifier into a polymerization reaction zone, converting at least 80 wt.% of the charged monomer to a polymer at 60 - 170°C, adding a compound represented by the formula: wherein R represents a hydrogen atom, an alkyl group having 1 - 12 carbon atoms, a cycloalkyl group having 7 - 11 carbon atoms or an aryl group having 6 - 10 carbon atoms, to the polymerization reaction liquid, carrying out reaction of the resulting mixture at 150 to 300°C in an imidization reaction zone, and finally separating volatile substances from the reaction liquid.
Inventors
- 👤 Hisao Anzai
- 👤 Hideaki Makino
- 👤 Isao Sasaki
- 👤 Kozi Nishida
- 👤 Masaru Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 12:11
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/38; C08F8/00; C08F8/30; C08F8/32
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
162 words
A process for the continuous preparation of nethacrylimide-containing polymers, which comprises introducing 10 to 60% by weight of an inert solvent, 90 to 40% by weight of methacrylic acid, a methacrylic acid ester or a monomer mixture comprising at least 50% by weight of methacrylic acid or a methacrylic acid ester, and a radical polymerization initiator and a molecular weight modifier into a polymerization reaction zone, converting ar least 80% by weight of the charged monomer to a polymer at a temperature of 60 to 170°C, adding a compound represented by the following general formula: wherein R represents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 7 to 11 carbon atoms or an aryl group having 6 to 10 carbon atoms, to the polymerization reaction liquid, carrying out reaction of the resulting mixture at a temperature of 150 to 300°C in an imidization reaction zone, and finally separating volatile substances from the reaction liquid.
Claim 2
Dependent Claim
162 words
A process for the continuous preparation of nethacrylimide-containing polymers, which comprises introducing 10 to 60% by weight of an inert solvent, 90 to 40% by weight of methacrylic acid, a methacrylic acid ester or a monomer mixture comprising at least 50% by weight of methacrylic acid or a methacrylic acid ester, and a radical polymerization initiator and a molecular weight modifier into a polymerization reaction zone, converting ar least 80% by weight of the charged monomer to a polymer at a temperature of 60 to 170°C, adding a compound represented by the following general formula: wherein R represents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 7 to 11 carbon atoms or an aryl group having 6 to 10 carbon atoms, to the polymerization reaction liquid, carrying out reaction of the resulting mixture at a temperature of 150 to 300°C in an imidization reaction zone, and finally separating volatile substances from the reaction liquid.
Claim 3
Dependent Claim
26 words
A process according to claim 1, wherein at least 90% by weight of the charged monomer is converted to a polymer in the polymerization reaction zone.
Claim 4
Dependent Claim
198 words
A process for the continuous preparation of methacrylimide-containing polymers, which comprises introducing 10 to 60% weight of an inert solvent, 90 to 40% by weight of methacrylic acid, a methacrylic acid ester or a monomer mixture comprising at least 50% by weight of methacrylic acid or a methacrylic acid ester, and a radical polymerization initiator and a molecular weight modifier into a first polymerization reaction zone, wherein the content is substantially homogeneously mixed, converting at least 40% by weight of the charged monomer to a polymer at a temperature of 60 to 170°C, subsequently converting at least 80% of the charged monomer to a polymer at a temperature of 80 to 170°C in a second polymerization reaction zone having a plug flow, adding a compound represented by the following general formula: wherein R represents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 7 to 11 carbon atoms or an aryl group having 6 to 10 carbon atoms, to the polymerization reaction liquid, carrying out reaction of the resulting mixture at a temperature of 150 to 300°C in an imidization reaction zone, and finally separating volatile substances from the reaction liquid.
Claim 5
Dependent Claim
198 words
A process for the continuous preparation of methacrylimide-containing polymers, which comprises introducing 10 to 60% weight of an inert solvent, 90 to 40% by weight of methacrylic acid, a methacrylic acid ester or a monomer mixture comprising at least 50% by weight of methacrylic acid or a methacrylic acid ester, and a radical polymerization initiator and a molecular weight modifier into a first polymerization reaction zone, wherein the content is substantially homogeneously mixed, converting at least 40% by weight of the charged monomer to a polymer at a temperature of 60 to 170°C, subsequently converting at least 80% of the charged monomer to a polymer at a temperature of 80 to 170°C in a second polymerization reaction zone having a plug flow, adding a compound represented by the following general formula: wherein R represents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 7 to 11 carbon atoms or an aryl group having 6 to 10 carbon atoms, to the polymerization reaction liquid, carrying out reaction of the resulting mixture at a temperature of 150 to 300°C in an imidization reaction zone, and finally separating volatile substances from the reaction liquid.
Claim 6
Dependent Claim
40 words
A process according to claim 3, wherein the conversion to the polymer in the first polymerization zone is at least 60% by weight and the conversion to the polymer in the second polymerization zone is at least 90% by weight.
Claim 7
Dependent Claim
31 words
A process according to any of claims 1 through 4, wherein the charged monomer is converted to a polymer at a temperature of 65 to 160°C in the polymerization reaction zone.
Claim 8
Dependent Claim
37 words
A process according to any of claims 1 through 5, wherein the amount of the inert solvent is 20 to 50% by weight based on the total weight of the inert solvent and the monomer or monomers.
Claim 9
Dependent Claim
81 words
A process according to any of claims 1 through 6, wherein the inert solvent in the imidization reaction zone is a mixed solvent comprising a poor solvent having a boiling point of 50 to 135°C under atmospheric pressure and not easily dissolving a methacrylic acid ester polymer therein at normal temperature and a good solvent having a boiling point of 50 to 135°C under atmospheric pressure and being capable of easily dissolving a methacrylic acid ester polymer therein at normal temperature.
Claim 10
Dependent Claim
25 words
A process according to claim 7, wherein the solubility parameter value 6 of the poor solvent is 14.0 to 19.5 (cal/cm 3 ) 1/2 .
Claim 11
Dependent Claim
25 words
a process according to claim 7, wherein the solubility parameter value δ of the good solvent is 8.5 to 13.9 (cal/cm 3 ) 1/2 .
Claim 12
Dependent Claim
29 words
A process according to any of claims 1 through 9, wherein the imidization reaction zone comprises at least two partitioned reaction zones where the reaction mixture is sufficiently stirred.
Claim 13
Dependent Claim
35 words
A process according to any of claims 1 through 10, wherein the amount of the compound of the formula RNH 2 is at least 20% by mole based on the monomer units of the polymer.
Claim 14
Dependent Claim
22 words
A process according to any of claims 1 through 11, wherein the compound of the formula RNH 2 is ammonia or methylamine.
Claim 15
Dependent Claim
28 words
A process according to any of claims 1 through 12, wherein the reaction in the imidization reaction zone is carried out at a temperature of 170 to 280°C.
Claim 16
Dependent Claim
32 words
A process according to any of claims 1 through 13, wherein the volatile substances are separated by heating the reaction liquid at a temperature of 200 to 300°C under a reduced pressure.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.