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EP0041108A2
Expired / Lapsed
EP
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Base for a graft polymer, novel graft polymer compositions, solvent and water-reducible coatings incorporating the novel polymers, and processes for making them
Assignee: SCM Corp
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Filing: 1981-03-23
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Granted: —
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Expires: 2001-03-23
Abstract
Abstract An aqueous dispersion is formed of a fluent resinous composition of a. a mixture in an organic solvent of (i) an ionizable graft polymer of an epoxy resin and an addition polymerized resin, the addition polymerized resin being bonded to aliphatic backbone carbon atoms of the epoxy resin by carbon-to-carbon bonds, and (ii) an extender resin; b. an aqueous vehicle, and c. an ionizing agent; the ionization present from said combined components being sufficient to establish the components as a dispersion in the aqueous vehicle, and a quantity of addition polymerizable monomer is polymerized in said aqueous dispersion, the aqueous dispersion serving as a vehicle for the polymerization. A grafting base may be produced by advancing an aromatic epoxy resin in the presence of at least one extender resin and a sufficient amount of an organic solvent to render the initial mixture and grafting base product fluent. The aqueous dispersion and the grafting base are formed into water reducible coating compositions.
Inventors
- 👤 James T.K. Woo
- 👤 Richard M. Marcinko
- 👤 Vincent W. Ting
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 20:36
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/10; C09; C09D; C09D151/00
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
148 words
A process for making a fluent blend of an advanced epoxy resin and an extender polymer, said epoxy resin and said extender polymer each having aliphatic backbone carbon atoms that have either one or two carbon atoms bonded thereto, which comprises: mixing an aromatic 1,2-epoxy resin, having an epoxy equivalent weight below about 2,000, with at least one extender polymer and with a sufficient amount of an organic solvent to render the mixture fluent, and then advancing the epoxy resin in the presence of said extender polymer and said solvent, by reacting the epoxy resin with a polyfunctional compound that adds to the epoxy resin at its epoxide groups, to increase the molecular weight of the resin, which polyfunctional compound is either a polycarboxylic compound or a polyhydroxy compound, and maintaining sufficient solvent in the mixture that the blend of advanced epoxy resin and extender polymer remains fluent.
Claim 2
Dependent Claim
148 words
A process for making a fluent blend of an advanced epoxy resin and an extender polymer, said epoxy resin and said extender polymer each having aliphatic backbone carbon atoms that have either one or two carbon atoms bonded thereto, which comprises: mixing an aromatic 1,2-epoxy resin, having an epoxy equivalent weight below about 2,000, with at least one extender polymer and with a sufficient amount of an organic solvent to render the mixture fluent, and then advancing the epoxy resin in the presence of said extender polymer and said solvent, by reacting the epoxy resin with a polyfunctional compound that adds to the epoxy resin at its epoxide groups, to increase the molecular weight of the resin, which polyfunctional compound is either a polycarboxylic compound or a polyhydroxy compound, and maintaining sufficient solvent in the mixture that the blend of advanced epoxy resin and extender polymer remains fluent.
Claim 3
Dependent Claim
71 words
The process of claim 1, wherein the epoxy resin is an adduct of a diglycidyl ether of a bisphenol that has an epoxy equivalent weight in the range from about 180 up to about 2,000, and the resin is advanced by reacting it at a temperature in the range from about 130°C. to about 250°C. with a bisphenol, to the point that it has an epoxy equivalent weight above about 2,000.
Claim 4
Dependent Claim
53 words
The process of claim 2, wherein the extender polymer is selected from the group consisting of a low molecular weight polyethylene, polystyrene , a styrene acrylate copolymer, an ethylene-vinyl acetate copolymer, a hydroxyl-terminated polyester or polyurethane, a styrene-acrylonitrile copolymer, a hydrocarbon resin, an epoxy resin, and mixtures of two or more of these.
Claim 5
Dependent Claim
15 words
The process of claim 2, wherein the extender polymer is ethylenically unsaturated and addition polymerizable.
Claim 6
Dependent Claim
20 words
The process of claim 2, wherein the extender polymer is a different epoxy resin than said first-named, aromatic, 1,2-epoxy resin.
Claim 7
Dependent Claim
14 words
The process of claim 1, wherein the polyfunctional compound is an aromatic polyhydric alcohol.
Claim 8
Dependent Claim
19 words
A process according to claim 1, wherein the polyfunctional compound is a polycarboxylic acid or a polycarboxylic acid anhydride.
Claim 9
Dependent Claim
12 words
The process of claim 1, wherein the polyfunctional compound is adipic acid.
Claim 10
Dependent Claim
11 words
The process of claim 1, wherein the acid is azelaic acid.
Claim 11
Dependent Claim
11 words
The process of claim 2, wherein the solvent employed comprises 2-butoxyethanol-l.
Claim 12
Dependent Claim
11 words
The process of claim 10, wherein the solvent also comprises n-butanol.
Claim 13
Dependent Claim
148 words
A process comprising reacting: (a), a tractable grafting base comprising: (i) a 1,2-epoxy resin having an epoxy equivalent weight of at least 500 and (ii) a second, extender polymer; said resin and said polymer having aliphatic backbone carbon atoms including carbons having only one or two hydrogens bonded thereto, each of said resin and said polymer contributing at least 10% by weight of the total solids present, and (b), vinyl monomer that is addition polymerizable through its ethylenic unsaturation; in the presence of a free radical initiator that is characterized by its ability to abstract hydrogen, at a temperature and in sufficient quantity that said initiator is operative simultaneously to cause addition polymerization of the monomer and to cause graft polymerization by carbon-to-carbon bonds of addition polymer to at least some of said aliphatic backbone carbons that have one or two hydrogens bonded thereto in the ungrafted state.
Claim 14
Dependent Claim
148 words
A process comprising reacting: (a), a tractable grafting base comprising: (i) a 1,2-epoxy resin having an epoxy equivalent weight of at least 500 and (ii) a second, extender polymer; said resin and said polymer having aliphatic backbone carbon atoms including carbons having only one or two hydrogens bonded thereto, each of said resin and said polymer contributing at least 10% by weight of the total solids present, and (b), vinyl monomer that is addition polymerizable through its ethylenic unsaturation; in the presence of a free radical initiator that is characterized by its ability to abstract hydrogen, at a temperature and in sufficient quantity that said initiator is operative simultaneously to cause addition polymerization of the monomer and to cause graft polymerization by carbon-to-carbon bonds of addition polymer to at least some of said aliphatic backbone carbons that have one or two hydrogens bonded thereto in the ungrafted state.
Claim 15
Dependent Claim
57 words
The process of claim 12, wherein the epoxy resin is an adduct of a bisphenol and a diglycidyl ether of a bisphenol and has been advanced in the presence of the extender polymer, and wherein said adduct has an epoxy equivalent weight of at least 2,000 and constitutes at least 45% of the grafting base by weight.
Claim 16
Dependent Claim
29 words
The process of claim 12, wherein the vinyl monomer includes an acrylic acid in sufficient quantity to establish the resinous product as a dispersion in a basic aqueous medium.
Claim 17
Dependent Claim
53 words
The process of claim 12, wherein the grafting base is a tractable product of the process of claim 1, 2 or 3, the initiator comprises at least 3% of benzoyl peroxide by weight based on monomer and the graft polymerization creates graft polymers to each of said epoxy resin and said extender polymer.
Claim 18
Dependent Claim
81 words
The process of claim 12, wherein the grafting base is a tractable product of the process of claim 1, 2 or 3, the initiator comprises at least 3% of benzoyl peroxide by weight based on monomer and the reaction product of the process consists of a mixture of graft polymer of the epoxy resin and of the extender polymer respectively, unreacted residuals of the epoxy resin and of the extender polymer respectively, and ungrafted addition polymer formed from the vinyl monomer.
Claim 19
Dependent Claim
35 words
The process of claim 12, wherein said ethylenically unsaturated compound comprises an unsaturated primary or secondary amine, present in sufficient quantity to establish the resinous reaction product as a dispersion in an acidic aqueous medium.
Claim 20
Dependent Claim
34 words
The process of claim 12, wherein said ethylenically unsaturated compound comprises a compound having in its molecule an epoxy group that can be rendered base functional by reaction with a primary or secondary amine.
Claim 21
Dependent Claim
69 words
The process of claim 14, 17 or 13, including the added process steps of forming a dispersion by adding the resinous reaction product of the process to an aqueous ioniz - ing medium, then adding to the dispersion at least one vinyl monomer and polymerization initiator therefor, under conditions of pressure, temperature, concentration and agitation that permit said monomer to polymerize in situ in the dispersion in dispersed form.
Claim 22
Dependent Claim
116 words
A resinous reaction product comprising a mixture of resinous solids, said solids being made up of components comprising: (i) addition polymerized monomer; (ii) an aromatic 1,2-epoxy resin having an epoxy equivalent weight of at least 500; (iii) an extender polymer, wherein each of said epoxy resin and said extender polymer have aliphatic backbone carbon atoms that have one or more hydrogens bonded thereto, and (iv) graft polymers of each of the epoxy resin and the extender polymer in which addition polymer side chains are grafted by carbon-to-carbon bonds to at..least some of said aliphatic backbone carbon atoms of the resin and of the polymer that had one or two hydrogens bonded thereto in the ungrafted state.
Claim 23
Dependent Claim
116 words
A resinous reaction product comprising a mixture of resinous solids, said solids being made up of components comprising: (i) addition polymerized monomer; (ii) an aromatic 1,2-epoxy resin having an epoxy equivalent weight of at least 500; (iii) an extender polymer, wherein each of said epoxy resin and said extender polymer have aliphatic backbone carbon atoms that have one or more hydrogens bonded thereto, and (iv) graft polymers of each of the epoxy resin and the extender polymer in which addition polymer side chains are grafted by carbon-to-carbon bonds to at..least some of said aliphatic backbone carbon atoms of the resin and of the polymer that had one or two hydrogens bonded thereto in the ungrafted state.
Claim 24
Dependent Claim
30 words
The resinous reaction product of claim 20, wherein the solids include a sufficient number of ionizable sites to establish the reaction product as a dispersion in an aqueous ionizing medium.
Claim 25
Dependent Claim
27 words
The resinous reaction product of claim 20, wherein the ionizable sites are located in the side chains of said graft polymer and in said addition polymerized monomer.
Claim 26
Dependent Claim
42 words
The product of claim 20, 21 or 22, wherein the epoxy resin is oxirane-terminated and the resinous reaction product of claim 22 wherein the ionizable sites are located in the side chains of said graft polymer and in said addition polymerized monomer.
Claim 27
Dependent Claim
34 words
The reaction product of claim 22, wherein the solids are acid functional and wherein the acid-functionality is sufficiently high to establish the resinous reaction product as a dispersion in a basic aqueous ionizing medium.
Claim 28
Dependent Claim
36 words
The resinous reaction product of claim 22, wherein the solids are base functional and wherein the base functionality is sufficiently high to establish the resinous reaction product as a dispersion in an acidic aqueous ionizing medium.
References Cited (Backward Citations)
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