TH15056B - Flame retardant precision resin mechanical part for use in office automation machines. - Google Patents

Abstract

A mechanical part of the resin with High fidelity flame retardant for use in office automation machines that need to function with High accuracy and high fidelity Where these parts are produced by die casting by injecting thermoplastic resin elements. Containing (A) an anabolic thermoplastic resin, (B) inorganic additive in the form of flakes, and (C) a specific phosphoric acid ester. Where a group of phosphoric acid esters, are bonded via bisphenol, the mechanical part of the precision resin of this fabrication is without the disadvantage that experience Passed through is the vaporization of the flame retardant contained in the resin. The occurrence of smoke due Caused by vaporization of the flame retardant. And the appearance of MD (accumulation of items from the press) while casting these items. In addition, the mechanical part of this invention is unlikely to be affected by twisting. And has the advantage of having a slight shrinkage ratio while With the casting of these items In addition, the mechanical parts of the invention are not only high-precision, but also excellent mechanical properties: low anisotropic. The most in the coefficient of linear expansion And the characteristics of excellent oscillation, the mechanical part of the invention resin can achieve the advantages as it is the mechanical part for High-precision operating machine Where it wants to perform its functions with high accuracy and fidelity even under severe conditions such as computers, game consoles, sound reproduction systems, audio-visual operating machines, copiers, printers, fax equipment, personal computers Word processor Desktop and machine communication tools Performing the assembly of the parts contained in these items

Claims (7)

1.High precision flame retardant resin mechanical part for use in office automation machines where high accuracy and precision function are required. This was done by injecting a thermoplastic resin component consisting of 100 parts (A) by weight of 5 to 150 parts of an uncontaminated monoplastic resin (B) by weight of inorganic additives. Fragments made up of one or more additives selected from a group consisting of glass shards and mica shards, where the glass shard had a majority diameter of the weight average of 1,000. Micrometers (microns) or less, with a mean weighting ratio of 5 or more, and a fraction of mica with a weight mean diameter of 1000 μm or less, and a mean weighting ratio of 10 or more. And (C) 3 to 50 parts by weight of the phosphoric acid ester This can be illustrated by the following formula (I): (Chemical formula) where each group of Q1, Q2, Q3 and Q4 is independent. This can be represented by hydrogen atoms or alkyl groups containing 1 to 6 carbon atoms. Each group of R1, R2, R3 and R4 is independent of each other, represented by methyl groups. Or hydrogen atoms; n represents integers 1 or greater, each of n1 and n2 is independent of each other, denoted by integers from 0 to 2, and each of m, m2, m3, and m4 independently, represented by integers from 1 to. 3 2. The mechanical part of the resin with high precision of the flame retardant according to Consistent with claim 1, where injection molding is gas-assisted injection molding. 3. The mechanical part of the resin with high precision of the flame retardant, according to Consistent with claim 1, where the inorganic additive in the form of a fraction is composed of a piece of glass. 4. The mechanical part of the resin with high precision of the flame retardant according to Consistent with claim 1, where the inorganic additive in the form of a fraction is composed of mica scraps. 5. The mechanical part of the resin with high precision of the flame retardant according to Consistent with claim 1, where the inorganic additive in the form of a scrap is composed of a scrap piece. Glass and mica shards 6. The mechanical part of the resin with high precision of flame retardant according to Corresponds to any of claims 1 to 5 where the thermoplastic resin composition Fiber-like reinforcing additives And where the total weight of the inorganic additive in fraction form And the fiber reinforcing additive is 150 parts by weight or less. 7.The mechanical part of the resin with high precision of the flame retardant as required by This corresponds to claim 1 to 6, where the fiber-like additive is available in amounts from 25 to 75% by weight on the basis of the total weight of the inorganic additive as a scrap. And fiber reinforcing additives