EP0099647A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Superior solvent blends for synthesis of acrylic resins for high solids coatings
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1983-06-15
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Granted: —
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Expires: 2003-06-15
Abstract
Abstract An improved method for providing acrylic copolymer resins is provided in which the polymerization solvent comprises a blend of methyl isobutyl ketone and alkyl-substituted benzenes. The monomers comprise hydroxy-substituted alkyl (meth)acrylate monomers and non-hydroxy substituted alkyl (meth)acrylate monomers, and the process provides an improved method for forming low molecular weight acrylic resins useful as components in acrylic coatings. The polymerization solvent can remain in the resin to become a solvent employed in the higher solids coating containing the thus-formed acrylic resins and provides improved electrical resistivity, improved solvency and decreased surface tensions over prior art polymerization solvents.
Inventors
- 👤 Constantine Joseph Bouboulis
- 👤 Irving Kuntz
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 04:56
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F220/14; C08F220/16; C08F220/18; C08F220/1804; C08F220/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
99 words
A process for forming acrylic copolymer resins which comprises contacting under pol y meriz- ing conditions at least one hydroxy-substituted alkyl (meth)acrylate monomer and at least one non-hydroxy substituted alkyl (meth)acrylate monomer in the presence of a free radical initiator and a solvent therefor, said solvent comprising methyl isobutyl ketone and at least one alkyl-substituted benzene in which the alkyl substituent(s) contain a total of at least 2 carbon atoms when the benzene ring is monoalkyl substituted and contains a total of at least 3 carbon atoms when the benzene ring is substituted by two or more alkyl groups.
Claim 2
Dependent Claim
99 words
A process for forming acrylic copolymer resins which comprises contacting under pol y meriz- ing conditions at least one hydroxy-substituted alkyl (meth)acrylate monomer and at least one non-hydroxy substituted alkyl (meth)acrylate monomer in the presence of a free radical initiator and a solvent therefor, said solvent comprising methyl isobutyl ketone and at least one alkyl-substituted benzene in which the alkyl substituent(s) contain a total of at least 2 carbon atoms when the benzene ring is monoalkyl substituted and contains a total of at least 3 carbon atoms when the benzene ring is substituted by two or more alkyl groups.
Claim 3
Dependent Claim
59 words
2 . The process as claimed in claim 1 wherein said hydroxy-substituted alkyl (meth)acrylate monomer comprises a member selected from the group consisting of monomers of the formula: wherein R 1 is hydrogen or methyl and R 2 and R 3 are independently selected from the group consisting of hydrogen and alkyl of from 1 to 6 carbon atoms.
Claim 4
Dependent Claim
43 words
The process as claimed in claim 1 or claim 2, wherein said non-hydroxy substituted alkyl(meth)acrylate monomer comprises at least one monomer of the formula: wherein R 4 is clkyl of from 1 to 6 carbon atoms and R 5 is hydrogen or methyl.
Claim 5
Dependent Claim
111 words
The process as claimed in any of claims 1 to 3, wherein said alkvl-substituted benzene solvent comprises at least one aromatic compound of the formula: wherein n is an integer of from 1 to 4, and X is in each instance in which it appears independently selected from the group consisting of straight and branched-chain alkyl of from 1 to 4 carbon atoms, with the proviso that when n is 1, X must contain at least 2 carbon atoms and with the further proviso that when n is 2 or higher, the X groups must contain a total of at least 3 carbon atoms, and mixtures of the foregoing aromatic compounds.
Claim 6
Dependent Claim
40 words
The process as claimed in any of claims 1 to 4, wherein said methyl isobutyl ketone/alkyl-substituted benzene solvent blend is employed in an amount of from about 20 to 60% by weight of the reaction mass in said polymerization reaction.
Claim 7
Dependent Claim
37 words
The process as claimed in any of claims 1 to 5, wherein said hydroxy-substituted alkyl (meth)acrylate monomer is employed in an amount of from 5 to 30 wt.% of the total monomers charged to said polymerization reaction.
Claim 8
Dependent Claim
33 words
The process as claimed in any of claims 1 to 6, wherein said non-hydroxy substituted alkyl (meth)acrylate monomer comprises from 5 to 95 wt% of the total monomers charged to said polymerization reaction.
Claim 9
Dependent Claim
29 words
The process as claimed in any of claims 1 to 7, wherein said polymerisation reaction is effected under refluxing conditions for a time of from 0.5 to 10 hours.
Claim 10
Dependent Claim
33 words
The process as claimed in any of claims 1 to 8, wherein the acrylic polymer produced in said polymerization reaction is characterized by a number average molecular weight of from 1,000 to 6,000.
Claim 11
Dependent Claim
87 words
A polymerizable composition comprising a mixture of from 20 to 60 wt.% of a solvent blend comprising methyl isobutyl ketone and an alkyl-substituted benzene solvent, said alkyl substituent(s) having at least 2 carbon atoms when said benzene ring is mono-alkyl substituted, and having at least 3 carbon atoms when said benzene ring is substituted by 2 or more alkyl groups, and from 40 to 80 wt.% of a monomer mixture containing at least one hydroxy-substituted alkyl (meth)acrylate monomer and at least one non-hydroxy substituted alkyl (meth)acrylate monomer.
Claim 12
Dependent Claim
87 words
A polymerizable composition comprising a mixture of from 20 to 60 wt.% of a solvent blend comprising methyl isobutyl ketone and an alkyl-substituted benzene solvent, said alkyl substituent(s) having at least 2 carbon atoms when said benzene ring is mono-alkyl substituted, and having at least 3 carbon atoms when said benzene ring is substituted by 2 or more alkyl groups, and from 40 to 80 wt.% of a monomer mixture containing at least one hydroxy-substituted alkyl (meth)acrylate monomer and at least one non-hydroxy substituted alkyl (meth)acrylate monomer.
References Cited (Backward Citations)
No citation records indexed.
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