Flame retardant laser direct structuring materials
AssigneeSabic Global Technologies B.V.
InventorsYanjun Frank Li, Jiru Meng, Xiangping David Zou
Life of this patent
Estimating the term…
Abstract
Flame retardant thermoplastic compositions that are capable of being used in a laser direct structuring process. The compositions include a thermoplastic resin, a laser direct structuring additive, and a flame retardant. The compositions offer flame retardant characteristics while also substantially maintaining the mechanical properties of the base thermoplastic resin, such as the impact strength and/or HDT of the composition. The compositions can be used in a variety of applications such as personal computers, notebook and portable computers, cell phone and other such communications equipment.
Claims12
A thermoplastic composition, comprising:
- a) from 70 to 85 wt % of a thermoplastic resin, wherein the thermoplastic resin comprises polyphenylene oxide, a polyphenylene oxide/polystyrene blend, or a combination comprising at least one of the foregoing resins;
- b) from 0.5 to 15 wt % of a laser direct structuring additive, wherein the laser direct structuring additive is a copper chromium oxide spine;
- and
- c) 0.1 to 15 wt % of a flame retardant, wherein the flame retardant comprises resorcinol bis(diphenyl phosphate), bisphenol-A bis(diphenyl phosphate), or a combination thereof;
- wherein amounts are based on a total weight of the thermoplastic composition, and
- wherein a molded sample of the thermoplastic composition is capable of being plated after being activated by a laser, wherein laser activation of the molded sample exposes metal atoms the LDS additive such that a roughened surface is formed containing embedded metal particles for crystal growth during plating, and wherein the molded sample has a UL94 VO rating at a thickness of 1.2 mm to 1.5 mm (±10%).
A method of forming a thermoplastic composition comprising the step of:
- blending in an extruder:
- a) from 70 to 85 wt % of a thermoplastic resin, wherein the thermoplastic resin comprises polyphenylene oxide, a polyphenylene oxide/polystyrene blend, or a combination comprising at least one of the foregoing resins;
- b) from 0.5 to 15 wt % of a laser direct structuring additive, wherein the laser direct structuring additive is a copper chromium oxide spinel;
- and
- c) 0.1 to 15 wt % or less of a flame retardant, wherein the flame retardant comprises resorcinol bis(diphenyl phosphate), bisphenol-A bis(diphenyl phosphate), or a combination thereof;
- wherein amounts are based on a total weight of the thermoplastic composition, and
- wherein a molded sample of the thermoplastic composition is capable of being plated after being activated by a laser, wherein laser activation of the molded sample exposes metal atoms of the LDS additive such that a roughened surface is formed containing embedded metal particles for crystal growth during plating and wherein the molded sample has a UL94 VO rating at a thickness of 1.2 nun to 1.5 mm(±10%).
Dependencies are inferred from the claim text.