Alkyd-supported emulsion interpolymers and methods for preparation
AssigneeP.R.A. Laboratories Incorporated
InventorsDennis E. Lietz, Layton F. Kinney
Life of this patent
Estimating the term…
Abstract
Neutralized, aqueous solutions of alkyd resins are used as the sole emulsifiers to stabilize emulsion polymers formed using vinyl monomers. A product emulsion system contains on a 100 weight percent total system non-volatile solids basis typically from about 25-50 weight percent alkyd resin with the balance being in situ emulsion polymerized vinyl monomers. Product emulsion systems are storage stable and can be coated or cast to form clear films, and paints formulated therefrom can display excellent gloss, leveling and water resistance qualities.
Claims51
A storage stable, emulsifier free, pourable emulsion comprising on a 100 weight percent total weight basis:
- (A) from about 10 to 65 weight percent of an interpolymer system, and
- (B) the balance up to 100 weight percent thereof being a carrier liquid selected from the group consisting of water and an organic water miscible liquid,
- (C) said interpolymer system comprising on a 100 weight percent total non-volatile resin solids basis
- (1) from about 5 to 90 weight percent of preformed, water-soluble alkyd resin which is free from unsaturated dibasic acid material selected from the group consisting of maleic acid, maleic anhydride, fumaric acid and itaconic acid and which has been pre-neutralized to a starting aqueous alkyd resin solution pH ranging from about 6 to 9, and
- (2) the balance up to 100 weight percent thereof being at least one in situ emulsion polymerized vinyl monomer,
- (D) said carrier liquid comprising on a 100 weight percent total carrier liquid basis:
- (1) from 0 to about 50 weight percent of said organic water miscible liquid, and
- (2) the balance up to 100 weight percent thereof being water.
A process for making an emulsion comprising the steps of adding at least one vinyl monomer in the presence of an initiator to an aqueous solution, said solution being emulsifier free and comprising initially on a 100 weight percent total weight basis:
- (A) from about 10 to 60 weight percent of at least one dissolved alkyd resin which is free from unsaturated dibasic acid material selected from the group consisting of maleic acid, maleic anhydride, fumaric acid, and itaconic acid,
- (B) sufficient base to neutralize such solution to a pH ranging from 6 to 9, and
- (C) the balance up to 100 weight percent of any given such solution comprising water and at least one water miscible solvent which is present in an amount from 0 up to about 50 weight percent based on total starting aqueous alkyd resin solution,
- said adding being carried out while maintaining the temperature of said aqueous system in the range from about 25.degree. to 95.degree. C, thereby to form an emulsion polymer, the total amount of said vinyl monomer so added being sufficient to produce from about 10 to 65 weight percent of emulsion polymer in the resulting such aqueous system, said emulsion polymer as formed being stabilized by said alkyd resin.
A process for making an emulsion comprising the step of adding while agitating at least one vinyl monomer to an aqueous solution, said aqueous solution comprising initially on a 100 weight percent total weight basis:
- (A) from about 15 to 25 weight percent of a preformed, dissolved alkyd resin which is free from unsaturated dibasic acid material selected from the group consisting of maleic acid maleic anhydride, fumaric acid and itaconic acid,
- (B) sufficient base to neutralize such solution to a pH ranging from about 6 to 9,
- (C) from about 0.1 to 5 weight percent of a dissolved vinyl monomer polymerization initiator, and
- (D) from about 40 to 90 weight percent water and optionally at least one water miscible solvent which is present in an amount up to about 50 weight percent based on total starting aqueous alkyd resin solution,
- said adding being carried out while maintaining the temperature of said aqueous system in the range from about 25.degree. to 95.degree. C, thereby to form a latex polymer, the total amount of said vinyl monomer so added being sufficient to produce from about 15 to 50 weight percent of latex polymer in the resulting such aqueous system, said latex polymer as formed being stabilized by said alkyd resin.
Dependencies are inferred from the claim text.