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US3928273A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of making organic solvent free aqueous coating compositions of acrylic polymer latex, water soluble emulsion-polymerized acrylic polymer, and aminoplast

Assignee: EIDP Inc
•
Filing: 1974-06-03
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Granted: 1975-12-23
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Expires: 1994-06-03
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Abstract

Abstract Water-based paints having improved properties and application characteristics are disclosed. The paint, exclusive of optional components such as pigments, particulate fillers and catalysts, comprises a liquid, continuous aqueous phase. About 30 to about 50% by weight of this phase exclusive of the aforecited optional components, is made up of a mixture of (a) an amino resin crosslinking agent; (b) a mixture of at least two copolymers of acrylic monomers; and (c) an amine. The balance is water or, in certain embodiments, water and an organic solvent. The mixture of copolymers comprises (1) about 5 to about 50, preferably about 10 to about 30, parts by weight of a ''''solution polymer'''', i.e., a carboxy-functional copolymer of acrylic monomers that (i) is at least partially neutralized with an amine, (ii) is soluble in said aqueous phase, (iii) has average molecular weight (Mn) in the range of about 3,000 to about 20,000, and (iv) has Tg in the range of -15* to 50*C., and (2) about 50 to about 95, preferably about 70 to about 90, parts by weight of an ''''emulsion polymer'''', i.e., a copolymer of acrlic monomers having carboxy, hydroxy or carboxy and hyroxy functionality that (i) is essentially insoluble in said continuous phase, (ii) has average molecular weight (Mn) in the range of about 3,000 to about 20,000 and (iii) has Tg of -15* to 50*C. The amino resin crosslinking agent is present in an amount in the range of about 15 to about 35 weight percent of the sum of the weight of solution polymer and the weight of emulsion polymer. The amine is a water-soluble amine and is present in an amount sufficient to solubilize the solution polymer in the aqueous phase at a pH range of about 7 to about 10, most commonly in the range of about 7.1 to about 8.5. The invention claimed is directed to a method for producing such paints wherein both the solution polymer and the emulsion polymer are produced by emusion polymerization.

Inventors

  • 👤 Yun-Feng Chang
  • 👤 Mo-Fung Cheung
  • 👤 Ray A Dickie

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 12:25
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/064; C08; C08L; C08L33/00; C08L33/04; C08L33/06; C08L61/00; C08L61/20

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 340 words
IN A METHOD FOR PRODUCING AN AQUEOUS DISPERSION OF PAINT IN WHICH A CARBOXY-FUNCTIONAL POLYMER IS AT LEAST PARTIALLY NEUTRALIZED WITH A WATER-SOLUBLE AMINE AND DISPERSED WITH AN AMINO RESIN CROSSLINKING AGENT SELECTED FROM MELAMINE-FORMALDEHYDE RESINS AND UREA-FORMALDEHYDE RESINS IN AN AQUEOUS SOLUTION OF WATER AND A WATER-SOLUBLE AMINE, THE IMPROVEMENT WHEREIN THE AQUEOUS DISPERSION IS PRODUCED ESSENTIALLY FREE OF ORGANIC SOLVENTS BY INTIMATELY DISPERSING WITH SAID WATER, SAID AMINO RESIN CROSSLKINKING AGENT AND SAID WATER SOLUBLE AMINE: I. AN AQUEOUS EMULSION CONSISTING ESSENTIALLY OF WATER, WATERSOLUBLE AMINE, AND ABOUT 50 TO ABOUT 95 PARTS BY WEIGHT OF AN EMULSION POLYMER HAVING FUNCTIONALITY SELECTED FROM CARBOXY FUNCTIONALITY AND HYDROXY FUNCTIONALITY AND IS A COPOLYMER OF ACRYLIC MONOMERS THAT: A. IS ESSENTIALLY INSOLUBLE IN SAID AQUEOUS SOLUTION; B. HAS AVERAGE MOLECULAR WEIGHT (MN) IN THE RANGE OF ABOUT 3,000 TO ABOUT 20,000, AND C. HAS TG IN THE RANGE OF -15*C. TO 50*C., AND II. ABOUT 5 TO ABOUT 50 PARTS BY WEIGHT OF A SOLUTION POLYMER WHICH IS A CARBOXY-FUNCTIONAL COPOLYMER OF ACRYLIC MONOMERS THAT: A. IS AT LEAST PARTIALLY NEUTRALIZED WITH WATER-SOLUBLE AMINE, B. IS SOLUBLE IN SAID AQUEOUS SOLUTION, C. HAS AVERAGE MOLECULAR WEIGHT (MN) IN THE RANGE OF ABOUT 3,000 TO ABOUT 20,000, D. HAS TG IN THE RANGE OF -15*C. TO 50*C., AND E. HAS BEEN PREPARED BY EMULSION POLYMERIZATION IN WATER OF ABOUT 5 TO ABOUT 25 PERCENT OF AN ALPHABETA OF OLEFINICALLY UNSATURATED MONOCARBOXYLIC ACID SELECTED FROM ACRYLIC AND METHACRYLIC ACID AND 75 TO 95 MOLE PERCENT OF THER OTHER MONOETHYLENICALLY UNSATURATED MONOMERS CONSISTING ESSENTIALLY OF MONOMERS SELECTED FROM THE GROUP CONSISTING OF MONOACRYLATES, MONOMETHACRYLATES AND MONOVINYL HYDROCARBONS AT A TEMPERATURE BETWEEN ABOUT 45*C. AND THE REFLUX TEMPERATURE OF THE REACTION MIXTURE AND SUBSEQUENTLY AT LEAST PARTIALLY NEUTRALIZED WITH WATER-SOLUBLE AMINE IN THE WATER IN WHICH IT IS FORMED, SAID AMINO RESIN CROSSLINKING AGENT BEING PRESENT IN AN AMOUNT IN THE RANGE OF ABOUT 15 TO ABOUT 35 WEIGHT PERCENT OF THE SUM OF THE WEIGHTS OF SAID SOLUTION POLYMER AND SAID EMULSION POLYMER.
Claim 2
Dependent Claim 340 words
IN A METHOD FOR PRODUCING AN AQUEOUS DISPERSION OF PAINT IN WHICH A CARBOXY-FUNCTIONAL POLYMER IS AT LEAST PARTIALLY NEUTRALIZED WITH A WATER-SOLUBLE AMINE AND DISPERSED WITH AN AMINO RESIN CROSSLINKING AGENT SELECTED FROM MELAMINE-FORMALDEHYDE RESINS AND UREA-FORMALDEHYDE RESINS IN AN AQUEOUS SOLUTION OF WATER AND A WATER-SOLUBLE AMINE, THE IMPROVEMENT WHEREIN THE AQUEOUS DISPERSION IS PRODUCED ESSENTIALLY FREE OF ORGANIC SOLVENTS BY INTIMATELY DISPERSING WITH SAID WATER, SAID AMINO RESIN CROSSLKINKING AGENT AND SAID WATER SOLUBLE AMINE: I. AN AQUEOUS EMULSION CONSISTING ESSENTIALLY OF WATER, WATERSOLUBLE AMINE, AND ABOUT 50 TO ABOUT 95 PARTS BY WEIGHT OF AN EMULSION POLYMER HAVING FUNCTIONALITY SELECTED FROM CARBOXY FUNCTIONALITY AND HYDROXY FUNCTIONALITY AND IS A COPOLYMER OF ACRYLIC MONOMERS THAT: A. IS ESSENTIALLY INSOLUBLE IN SAID AQUEOUS SOLUTION; B. HAS AVERAGE MOLECULAR WEIGHT (MN) IN THE RANGE OF ABOUT 3,000 TO ABOUT 20,000, AND C. HAS TG IN THE RANGE OF -15*C. TO 50*C., AND II. ABOUT 5 TO ABOUT 50 PARTS BY WEIGHT OF A SOLUTION POLYMER WHICH IS A CARBOXY-FUNCTIONAL COPOLYMER OF ACRYLIC MONOMERS THAT: A. IS AT LEAST PARTIALLY NEUTRALIZED WITH WATER-SOLUBLE AMINE, B. IS SOLUBLE IN SAID AQUEOUS SOLUTION, C. HAS AVERAGE MOLECULAR WEIGHT (MN) IN THE RANGE OF ABOUT 3,000 TO ABOUT 20,000, D. HAS TG IN THE RANGE OF -15*C. TO 50*C., AND E. HAS BEEN PREPARED BY EMULSION POLYMERIZATION IN WATER OF ABOUT 5 TO ABOUT 25 PERCENT OF AN ALPHABETA OF OLEFINICALLY UNSATURATED MONOCARBOXYLIC ACID SELECTED FROM ACRYLIC AND METHACRYLIC ACID AND 75 TO 95 MOLE PERCENT OF THER OTHER MONOETHYLENICALLY UNSATURATED MONOMERS CONSISTING ESSENTIALLY OF MONOMERS SELECTED FROM THE GROUP CONSISTING OF MONOACRYLATES, MONOMETHACRYLATES AND MONOVINYL HYDROCARBONS AT A TEMPERATURE BETWEEN ABOUT 45*C. AND THE REFLUX TEMPERATURE OF THE REACTION MIXTURE AND SUBSEQUENTLY AT LEAST PARTIALLY NEUTRALIZED WITH WATER-SOLUBLE AMINE IN THE WATER IN WHICH IT IS FORMED, SAID AMINO RESIN CROSSLINKING AGENT BEING PRESENT IN AN AMOUNT IN THE RANGE OF ABOUT 15 TO ABOUT 35 WEIGHT PERCENT OF THE SUM OF THE WEIGHTS OF SAID SOLUTION POLYMER AND SAID EMULSION POLYMER.

References Cited (Backward Citations)

US3107227A Cited
US3218280A Cited
US3245932A Cited
US3821145A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-12-22 1979-06-23 1979-12-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-12-22 1983-06-23 1983-12-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-12-22 1987-06-23 1987-12-23 $7700.00 Window Closed / Lapsed

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