C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 9/06 (2006.01) B41M 5/26 (2006.01) C08L 27/12 (2006.01) C09C 1/04 (2006.01) C09C 1/36 (2006.01) C09C 3/12 (2006.01) H01B 3/18 (2006.01) H01B 3/30 (2006.01) H01B 3/44 (2006.01)
Patent
CA 2429596
Pigments and compositions for use in laser marking. A colorless UV-absorbing pigment at least partially coated with a synergist has the formula [R m(SiO n)]p R'q, wherein (a) m is 1 to 3, n is 1 to 3, p is at least 1, and q is 0 to 3, and (b) at least one R or R' is a substituent that upon pyrolysis generates a black material suitable for providing a mark. Such pigments are useful in fluoropolymers used for wire and cable insulation.
L'invention concerne des pigments et des compositions utilisés dans le marquage au laser. Un pigment incolore absorbant les UV, recouvert au moins partiellement d'un synergiste, est représenté par la formule [Rm(SiOn)]pR'q' dans laquelle : (a) m est compris entre 1 et 3, n est compris entre 1 et 3, p représente au moins 1, et q est compris entre 0 et 3, et (b) au moins un R ou R' est un substituant qui, suite à la pyrolyse, produit une matière noire convenant au marquage. Par ailleurs, on intègre ces pigments dans les fluoropolymères utilisés dans les isolants de fils et de câbles électriques.
Daga Vijay
Dahl Klaus J.
Marks & Clerk
Tyco Electronics Corporation
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