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.
Claims14
A thermoplastic composition, comprising:
- a) from 70 to 85 wt % of a thermoplastic resin, wherein the thermoplastic resin comprises a polyamide resin;
- b) from 0.5 to 15 wt % by weight 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 % 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,
- wherein a molded sample of the thermoplastic composition is capable of achieving UL94 V0 rating at a thickness of 1.6 mm (±10%), and
- wherein laser activation of an area of the thermoplastic composition exposes and activates metal atoms of the laser direct structuring additive such that a metal plating layer can be plated on the area activated by the laser.
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 a polyamide resin;
- 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 % of a flame retardant, wherein the flame retardant comprises resorcinol bis(diphenyl phosphate), bisphenol A bis(diphenyl phosphate), or a combination thereof;
- wherein a molded sample of the thermoplastic composition is capable of achieving UL94 V0 rating at a thickness of 1.6 mm (±10%), and
- wherein laser activation of an area of the thermoplastic composition exposes and activates metal atoms of the laser direct structuring additive such that a metal plating layer can be plated on the area activated by the laser.
Dependencies are inferred from the claim text.