Labofina, S.a.

Jean-Paul Dekerk

Willem Sietses

Hendrik Van Der Poel

Jozef Braeken

Tjalling M Plantenga

Jozef Verborgt

Peter Haak

A process for preparing pigmented PVdF-based powder coating products is disclosed, which comprises the steps of (i) mixing PVdF resin with a compatible thermoplastic resin, preferably PMMA in a weight ratio of about 80:20 to 40:60, with pigments, and with a small amount of flow promoter, (ii) pelletizing the mixture of (i), and (iii) cryogenically grinding the pellets and sieving the large particles. Also disclosed is a process for coating a substrate, comprising the steps of (a) applying the above prepared powder coating product on a substrate, and (b) subjecting to a heat treatment.

PVdF-based powder coatings

Self polishing anti-fouling marine paint compositions, that can be prepared free of organotin, comprise: (i) at least one sparingly soluble organic compound that is an organic acid or an organic acid salt preferably selected from rosin-based compounds, metal salts of saturated fatty acids, either branched-chain or alicyclic; (ii) a copolymer prepared from at least one acrylic monomer, at least one monomer selected from C.sub.1 -C.sub.4 alkyl methacrylates and styrene, and at least one monomer selected from cyclic tertiary amides or imides having an alkenyl group; (iii) at least one sparingly soluble metalliferous pigment; (iv) at least one marine biocide which can also function as the pigment; and optionally (iv) one or more highly insoluble pigments.

Self polishing anti-fouling paints

A paint composition comprising a film-forming polymer, and at least one sparingly soluble metalliferous pigment, and wherein said polymer comprises (A) from 20 to 45 wt. % of monomer units of at least one triorganotin salt of an olefinically unsaturated carboxylic acid; (B) from 5 to 35 wt. % of at least one comonomer selected from the group consisting of VP (vinylpyrrolidone), VPi (vinylpiperidone) and VC (vinylcaprolactam), and wherein the total of A+B amounts to from about 40 to about 70 wt. % of the polymer composition; and (C) the balance of said polymer being monomer units of at least one C.sub.1 -C.sub.4 alkyl methacrylate, styrene and mixtures of said methacrylate and styrene.

Growing community of inventors

Heverlee, Belgium

Jean-Paul Dekerk