Claims
- 1. An air-drying aqueous polymer dispersion comprising an effective air-drying amount of a drier compound and a core/shell polymer with an alkyd resin in the core and an addition polymer grafted thereon, wherein about 50-90 weight percent of the core/shell polymer is composed of alkyd resin and about 50-10 weight percent is composed of addition polymer, with the alkyd resin
- containing more than 40 and up to 80 weight percent, based on alkyd resin, of unsaturated fatty acid, at least 5 mole percent of which contains conjugated double bonds,
- having an acid number of not more than 5 (mg KOH/g), and
- having a number average molecular weight in the range of 400 to 5000, and
- with the addition polymer having an acid number in the range of 40 to 200 (mg KOH/g), wherein the core/shell polymer is obtained by the addition polymerization of free radical polymerizable monomers in the presence of the alkyd resin.
- 2. A polymer dispersion according to claim 1, wherein the alkyd resin is composed of:
- (a) n moles of an aromatic and/or cycloaliphatic dicarboxylic acid or ester-forming equivalent thereof,
- (b) x moles of a triol having 3-12 carbon atoms, and/or y moles of a tetrafunctional alcohol having 4-13 carbon atoms, with x+y=n+1,
- (c) (x+y) to (x+y+2) moles of an unsaturated fatty acid, and
- - 10weight percent of a glycidyl ester of a carboxylic acid according to formula (I): ##STR4## wherein R.sup.1 is an alkyl group having 4-40 carbon atoms.
- 3. A polymer dispersion according to claim 1, wherein the alkyd resin is composed of:
- (a) n moles of an aromatic and/or cycloaliphatic tricarboxylic acid or ester-forming equivalent thereof,
- (b) x moles of a diol having 2-12 carbon atoms, and/or y moles of a triol having 3-12 carbon atoms, with x+y=2n+1,
- (c) (x+y-1) to (2y+x+1-n) moles of an unsaturated fatty acid, and
- (d) 2-10 weight percent of a glycidyl ester of a carboxylic acid according to formula (I): ##STR5## wherein R.sup.1 is an alkyl group having 4-40 carbon atoms.
- 4. A polymer dispersion according to claim 1, wherein the alkyd resin has a number average molecular weight (Mn) in the range of about 500 to 4000 and a dispersity (Mw/Mn) value of less than about 4 and greater than 1.
- 5. A polymer dispersion according to claim 1, wherein the acid number of the alkyd resin has a value less than 5 through conversion with a glycidyl ester of a carboxylic acid or some other mono-epoxide.
- 6. A polymer dispersion according to claim 1, wherein the shell is obtained from a monomer mixture comprising:
- 20-50 mole percent of styrene and/or e-methylstyrene,
- 20-30 mole percent of (meth)acrylic acid, and
- 20-60 mole percent of some other mono-unsaturated compound.
- 7. A polymer dispersion according to claim 1, wherein the shell incorporates an amount up to about 20 weight percent of a hydroxypolyethylene glycol (meth)acrylate, hydroxypolyethylene glycol/polypropylene glycol (meth)acrylate, hydroxypolypropylene glycol (meth)acrylate or alkoxy derivative thereof, or some other unsaturated monomer containing hydroxy- or alkoxypolyoxyalkylene groups having an Mn in the range of about 500 to 3000.
- 8. A polymer dispersion according to claim 6, wherein, the shell incorporates an amount up to about 20 weight percent of a hydroxypolyethylene glycol (meth)acrylate, hydroxypolyethylene glycol/polypropylene glycol (meth)acrylate, hydroxypolypropylene glycol (meth)acrylate or alkoxy derivative thereof, or some other unsaturated monomer containing hydroxy- or alkoxypolyoxyalkylene groups having an Mn in the range of about 500 to 3000.
- 9. A polymer dispersion according to claim 1 wherein at least a portion of the addition polymer's carboxyl groups are neutralized.
- 10. A coating composition comprising an aqueous polymer dispersion according to claim 1.
- 11. A coating composition comprising an aqueous polymer dispersion according to claim 6.
- 12. A coating composition comprising an aqueous polymer dispersion according to claim 7.
- 13. A coating composition comprising an aqueous polymer dispersion according to claim 8.
- 14. A coating composition comprising an aqueous polymer dispersion according to claim 9.
- 15. A cured coating composition produced by curing at ambient temperature a coating composition according to claim 10.
- 16. A method of producing a cured coating composition the method comprising applying to a substrate a coating composition according to claim 10 and curing at ambient temperature.
- 17. A topcoat comprising a coating composition according to claim 10.
- 18. A substrate coated with two coating layers wherein each coating layer comprises a coating composition according to claim 10.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9300115 |
Jan 1993 |
NLX |
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Parent Case Info
This is a continuation of application Ser. No. 08/183,453 filed Jan. 19, 1994 now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (2)
Number |
Date |
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0677371 |
Jan 1964 |
CAX |
0083137 |
Jul 1983 |
EPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
183453 |
Jan 1994 |
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