Composition comprising a dye
AssigneeBayer MaterialScience AG
InventorsRobert A. Pyles, Rick L. Archey
Life of this patent
Estimating the term…
Abstract
A process for tinting of articles molded from a polymeric resin is disclosed. Preferably, the article is molded from polycarbonate and the process entails immersing the molded article in a dye bath that contains water, dye, a carrier and an optional surfactant. The carrier is a compound conforming to R1[—O—(CH2)n]mOR2 (i) wherein R1 and R2 independently denote H or C1-18 alkyl, benzyl, benzoyl or phenyl radical which may be substituted in the aromatic ring by alkyl and or halogen, preferably R1=butyl, R2=H, n is 2 or 3 and m is 2 to 35. The method is especially useful in the manufacture of tinted lenses.
Claims21
A process of dyeing a molded article comprising the steps of
- (i) immersing at least a portion of said article in a dyeing bath that contains a carrier and a tinctorial amount of at least one dye, said bath maintained at a temperature of 90 to 99° C. and
- (ii) retaining said portion in said bath for a period of time sufficient to allow a predetermined amount of dye to diffuse into said article, and
- (iii) removing said article from said bath,
- wherein molded article comprise at least one polymeric resin selected from the group consisting of (co)polyester, (co)polycarbonates, acrylonitrile-butadiene-styrene, polyamide, polyurethane, polyalkyl(meth)acrylate and styrene copolymers, and wherein said carrier conforms to
- R1[—O—(CH2)n]mOR2
- wherein and R2 and R1 independently denote H or C1-18 alkyl, benzyl, benzoyl or phenyl radical, n is 2 or 3 and m is 2-35.
A process of dyeing a molded article comprising the steps of
- (i) immersing at least a portion of said article in a dyeing bath that contains a carrier and a tinctorial amount of at least one disperse dye, said bath maintained at a temperature of 90 to 99° C., and
- (ii) retaining said portion in said bath for a period of time sufficient to allow a predetermined amount of dye to diffuse into said article, and
- (iii) removing said article from said bath,
- wherein molded article comprise at least one polymeric resin selected from the group consisting of (co)polyester, (co)polycarbonates, acrylonitrile-butadiene-styrene, polyamide, polyurethane, polyalkyl(meth)acrylate and styrene copolymers, and wherein said carrier conforms to
- R1[—O—(CH2)n]mOR2
- wherein and R2 and R1 independently denote H or C1-18 alkyl, benzyl, benzoyl or phenyl radical., n is 2 or 3 and m is 2-35.
A composition of matter containing a resinous component, a dye, a carrier and an optional surfactant wherein carrier conforms structurally to
- R1[—O—(CH2)n]mOR2
- wherein and R2 and R1 independently denote H or C1-18 alkyl, benzyl, benzoyl or phenyl radical, n is 2 or 3 and m is 2-35, and wherein resinous component contains at least one member selected from the group consisting of (co)polyester, (co)polycarbonates, acrylonitrile-butadiene-styrene, polyamide, polyurethane, polyalkyl(meth)acrylate and styrene copolymers,
A composition of matter containing a resinous component, a disperse dye, a carrier and an optional surfactant wherein carrier conforms structurally to
- R1[—O—(CH2)n]mOR2
- wherein and R2 and R1 independently denote H or C1-18 alkyl, benzyl, benzoyl or phenyl radical, n is 2 or 3 and m is 2-35, and wherein resinous component contains at least one member selected from the group consisting of (co)polyester, (co)polycarbonates, acrylonitrile-butadiene-styrene, polyamide, polyurethane, polyalkyl(meth)acrylate and styrene copolymers,
Dependencies are inferred from the claim text.