Traitement en cours

Veuillez attendre...

Paramétrages

Paramétrages

Aller à Demande

1. WO1999003900 - REVETEMENT EN POUDRE OU FLUOROPOLYMERE REALISE A PARTIR DE RESINES A BASE DE FLUORURE DE VINYLIDENE THERMOPLASTIQUE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

The subject matter which applicants regard as their invention is particularly pointed out and distinctly claimed as follows:

We Claim
1. An improved blend of polyvinylidene fluoride based polymer, acrylic polymer and pigment useful for powder coatings wherein the improvement comprises the
polyvinylidene fluoride polymer and the acrylic polymer being combined as an acrylic modified
fluoropolymer .
2. An improved blend as defined in claim 1 wherein the pigment is combined with the acrylic modified fluoropolymer when the acrylic modified fluoropolymer is suspended as a latex.
3. An improved blend as defined in claim 1 wherein the acrylic modified fluoropolymer and the pigment are combined as dry powders .
4. A process for the preparation of an improved blend as defined in claim 1 comprising:
a) dispersing pigment in a latex of acrylic
modified fluoropolymer to create a first mixture,- b) ecovering the solids from the first mixture to obtain a blend as defined in claim 1 as a powder,- and, optionally, if necessary,
c) obtaining the improved blend of claim 1 in the desired particle size by a particle size
selecting process selected from milling, sieving or a combination thereof.

5. A process for the preparation of the improved blend of claim l comprising:
a) recovering the solids from an acrylic modified fluoropolymer latex,- b) if necessary, converting the solids recovered in step a to the desired particle size by a
process selected form milling, sieving or a
combination thereof;
c) combining the solids in the desired particle size prepared in step a, or optional step b, with pigment particle to obtain the improved blend of claim 1.
6. A process for the preparation of the improved blend of claim 1 comprising combining the dry resin recovered from an acrylic modified fluoropolymer latex, said resin having the desired particle size, with pigment particles having the desired particle size .
7. An article of manufacture comprising a substrate coated on at least one surface thereof with a coating derived from the improved blend as defined in claim one .
8. A process for the preparation of an article of manufacture as defined in claim 7 comprising applying to at least one surface of a substrate on which a coating is desired, a layer of the powder coating composition comprising a blend of acrylic modified fluoropolymer and pigment and coalescing said layer into a fixed coating by application of heat.

9. An article of manufacture comprising a substrate having on at least one surface thereof a coating derived from an unpigmented acrylic modified
fluoropolymer .
10. A process for the manufacture of an article of manufacture as defined in claim 9 which comprises applying an unpigmented acrylic modified fluoropolymer powder coating composition to the surface of a
substrate on which a coating is desired and coalescing said layer into fixed coating by application of heat.