Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Reexamination Certificate
1995-05-30
2001-08-21
Green, Anthony (Department: 1755)
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
C106S404000, C106S416000, C106S417000, C106S499000, C524S439000, C524S441000, C524S446000, C524S449000
Reexamination Certificate
active
06277188
ABSTRACT:
FIELD OF INVENTION
The present invention is concerned with a coating composition designed for the coating of transportation vehicles. The invention is related to coating compositions primarily for a refinish multi-coat system which includes primers and base coats, particularly with base coats containing special effect pigments. Special effect pigments include mica and can be used in the automotive refinish paint compositions according to this invention.
BACKGROUND AND PRIOR ART
Related automotive paint compositions of this type are disclosed in U.S. patent applications titled METALLIC WATER BORNE BASE COAT COMPOSITION BASED ON ACRYLIC LATEX RESINS USING A WATER REDUCIBLE RESIN FOR ALUMINUM STORAGE AND A PREGELLED HECTRORITE CLAY FOR RHEOLOGY CONTROL Ser. No. 553,065 filed Jul. 13, 1990, METALLIC WATER BORNE BASE COAT COMPOSITION BASED ON ACRYLIC LATEX RESINS USING A WATER REDUCIBLE RESIN FOR ALUMINUM STORAGE AND A TREATED HECTORITE CLAY FOR RHEOLOGY CONTROL Ser. No. 553,063 METALLIC WATER BORNE BASE COAT COMPOSITION BASED ON ACRYLIC LATEX RESINS USING AN ACRYLIC RESIN HAVING ACID AND NONIONIC FUNCTIONALITY FOR ALUMINUM STORAGE AND A PREGELLED HETORITE CLAY FOR RHEOLOGY CONTROL Ser. No. 554,606 filed Sep. 10, 1990, METALLIC WATER BORNE BASE COAT COMPOSITION BASED ON ACRYLIC LATEX RESINS USING AN ACRYLIC RESIN HAVING ACID AND NONIONIC FUNCTIONALITY FOR ALUMINUM STORAGE AND A TREATED HETORITE CLAY FOR RHEOLOGY CONTROL Ser. No. 553,100 filed Jul. 13, 1990, METALLIC WATER BORNE BASE COAT COMPOSITION BASED ON ACRYLIC LATEX RESINS AND ACRYLIC RESINS DERIVED FROM ACRYLIC MONOMERS HAVING NONIONIC, URETHANE AND ACID FUNCTIONALITY FOR ALUMINUM STORAGE AND A PREGELLED HECTORITE CLAY FOR RHEOLOGY CONTROL Ser. No. 553,069 filed Jul. 13, 1990, METALLIC WATER BORNE BASE COAT COMPOSITION BASED ON ACRYLIC LATEX RESINS AND ACRYLIC RESINS DERIVED FROM ACRYLIC MONOMERS HAVING NONIONIC, URETHANE AND ACID FUNCTIONALITY FOR ALUMINUM STORAGE AND A TREATED HECTORITE CLAY FOR RHEOLOGY CONTROL Ser. No. 553,070 filed Jul. 13, 1990, METALLIC WATER BORNE BASE COAT COMPOSITiON BASED ON ACRYLIC LATEX RESINS USING ACRYLIC RESINS DERIVED FROM VINYL MONOMERS HAVING NONIONIC AND URETHANE FUNCTIONALITY FOR ALUMINUM STORAGE AND A PREGELLED HECTORITE CLAY FOR RHEOLOGY CONTROL Ser. No. 553,066 filed Jul. 13, 1990, METALLIC WATER BORNE BASE COAT COMPOSITiON BASED ON ACRYLIC LATEX RESINS USING ACRYLIC RESINS DERIVED FROM VINYL MONOMERS HAVING NONIONIC AND URETHANE FUNCTIONALITY FOR ALUMINUM STORAGE AND A TREATED HECTORITE CLAY FOR RHEOLOGY CONTROL Ser. No. 553,067 filed Jul. 13, 1990, METALLIC WATER BORNE BASECOAT COMPOSITION BASED ON ACRYLIC LATEX RESINS USING ACRYLIC RESINS DERIVED FROM GRAFTING AN ISOCYANATE ADDUCT HAVING URETHANE AND NONIONIC FUNCTIONALITY ON TO AN ACRYLIC RESIN HAVING ACTIVE HYDROGEN FUNCTIONALITY FOR ALUMINUM STORAGE AND A PREGELLED HECTORITE CLAY FOR RHEOLOGY CONTROL Ser. No.553,064 filed Jul. 13, 1990, METALLIC WATER BORNE BASECOAT COMPOSITION BASED ON ACRYLIC LATEX RESINS USING ACRYLIC RESINS DERIVED FROM GRAFTING AN ISOCYANATE ADDUCT HAVING URETHANE AND NONIONIC FUNCTIONALITY ON TO AN ACRYLIC RESIN HAVING ACTIVE HYDROGEN FUNCTIONALITY FOR ALUMINUM STORAGE AND A TREATED HECTORITE CLAY FOR RHEOLOGY CONTROL Ser. No. 553,068 and ACRYLIC LATEX METALLIC WATER BORNE BASE COAT OF IMPROVED APPEARANCE Ser. No. 07/355,959 filed May 23, 1989. All of these U.S. patents and applications are incorporated herein by reference.
BACKGROUND OF THE INVENTION
It is customary in the painting of an automobile that a series of coatings be applied to the substrate. The first coat being the primer followed by the basecoat and finally a clearcoat, if desired. The basecoat provides the good decorative quality to the final finish via organic and inorganic pigments. In many automobile finishes, a metallic finish is desired. To obtain this metallic effect, metallic pigments are present in the basecoat, typically aluminum flakes. The aluminum flakes in the basecoat contribute to the glossy lustrous apperance of the final finish. More recently mica special effect pigment has been used in automotive finishes.
In the current market place, automobile coatings, especially basecoats, contain a high level of organic solvent. With increasing concern about the volatile organic emissions into the atmosphere, an intensive effort in research and development of coatings containing mainly water as the solvent with a small level of organic solvent is under way. An example of such an effort is U.S. Pat. No. 4,730,020 which discloses a water-dilutable coating composition comprising specifically selected acrylic copolymers, solvent blends, coloring and/or optical effect pigments and polymer dispersions. To obtain the desired optical effect of the metallic flakes, the correct combination of acrylic copolymer and solvent blend must be achieved. An aqueous thermosetting acrylic resin described by U.S. Pat. No. 3,862,071 controls the metallic pigment orientation by the addition of a water insoluble copolymer. Microgel technology as described by GB-PS No. 2,073,609 also results in the proper metal orientation. Also disclosed in DE No. 3,210,051 is an attempt to control metallic pigment orientation using polyurethane dispersions. Cellulosic esters have also been used to control metal fixation as disclosed in DE No. 3,216,549. The rheology modifiers or rheology control agents for water borne coatings have poor shelve stability, poor weathering characteristics and are cumbersome to use.
The use of mica in special effect OEM paint compositions is described and claimed in U.S. Pat. No. 4,557,410 issued Nov. 15, 1985. The use and desire of more and more of these special effect pigments requires the development of paint base compositions for each and every special effects pigment and for each and every paint line in the market place. This places a great cost on automotive paint suppliers since they must pay for formula development of new bases, product introduction of new formulas, warehouse stocking, customer supplying, and general formula code maintenance. The customers, paint shops and body shops, must also incur increased costs by buying more and more special effects bases to maintain their color matching capabilities. They also must find or purchase more mixing rack space to store these bases so that they are ready for use on a daily basis.
To alleviate these costs some suppliers have gone to supplying special effect pigments (ie. mica) in their dry raw and/or slightly solvent wetted forms. They reduce their formulation requirements by using the same raw micas in their different paint lines instead of formulating, producing, and supplying individual bases. This is possible due to the fact that raw or slightly wetted micas are somewhat universal and can be “stirred” into most current paint lines with few problems. This is a major change for their customers, however, since they now must learn to handle and accurately weigh dry dusty powders in place of the customary smooth flowing liquid bases. To achieve these same costs reductions and yet not subject paint jobbers and body shops to the use of dry, dusty, clumpy, and messy pigments one must seek out a special effects pigment in a form that is:
a) broadly compatible with a great majority of basecoat lines, thus one special effects base can replace or eliminate the need for many bases of the same special effect pigment.
b) liquid and easy to pour so that the customer does not have to learn to use dry dusty powders,
c) and shelf stable (non-settling) so a customer need not find or purchase additional mixing rack space as newer special effects come into the marketplace.
SUMMARY OF THE INVENTION
This invention relates to paint compositions for use in colorcoat paint compositions such as basecoats and in a multicoat system for the refinishing of automobiles, trucks and buses. Typically, basecoat coating compositions for the automotive refinishing market are prepared from a kit. A basecoat kit is composed essentially of several bases or tints that, generally, contain one to five different pigments resultin
Anderson James L.
Guyomard Daniel
Salter Keith L.
Starr Keith A.
BASF Corporation
Green Anthony
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