Polyphosphonate resin composition and molded article prepared therefrom

Patent metadata

Field	Value
Publication number	US-12466955-B2
Application number	US-202118010052-A
Country	US
Kind code	B2
Filing date	Jun 28, 2021
Priority date	Jun 30, 2020
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

A polyphosphonate resin composition of the present invention comprises: about 100 parts by weight of a polyphosphonate resin containing a repeating unit represented by chemical formula 1; and about 0.01 to about 0.05 parts by weight of a phosphite compound containing at least one of diphenyl hydrogen phosphite and a phosphite compound represented by chemical formula 2. The polyphosphonate resin composition has excellent heat resistance, wet heat stability, discoloration resistance, flame retardancy, and the like.

First claim

The invention claimed is:

1 . A polyphosphonate resin composition comprising:
about 100 parts by weight of a polyphosphonate resin comprising a repeat unit represented by Formula 1; and about 0.01 to about 0.05 parts by weight of a phosphite compound comprising at least one selected from diphenyl hydrogen phosphite and a phosphite compound represented by Formula 2;

where Ar is a substituted or unsubstituted C 6 to C 20 aryl group;

where R 1 is a linear or branched C 4 to C 16 alkyl group, R 2 is a C 1 to C 10 alkyl group, and n is an integer of 0 to 5.

2 . The polyphosphonate resin composition according to claim 1 , wherein the polyphosphonate resin comprises a polymer of bisphenol-A and diarylaryl phosphonate.

3 . The polyphosphonate resin composition according to claim 1 , wherein the polyphosphonate resin comprises about 90 mol % or more of the repeat unit represented by Formula 1 based on 100 mol % of all repeat units.

4 . The polyphosphonate resin composition according to claim 1 , wherein the polyphosphonate resin has a weight average molecular weight (Mw) of about 20,000 to about 100,000 g/mol, as measured by gel permeation chromatography (GPC).

5 . The polyphosphonate resin composition according to claim 1 , wherein the polyphosphonate resin composition has a weight average molecular weight difference (ΔMw) of about 1,000 g/mol or less, as calculated by Equation 1:
Weight average molecular weight difference (Δ Mw )= Mw 0 −Mw 1   [Equation 1]

where Mw 0 is a weight average molecular weight (Mw) of the resin composition, as measured by gel permeation chromatography (GPC), and Mw 1 is a weight average molecular weight (Mw) of the resin composition, as measured on a specimen by GPC, in which the specimen is prepared in pellet form through re-extrusion of the resin composition once at 170° C.

6 . The polyphosphonate resin composition according to claim 1 , wherein the polyphosphonate resin composition has a weight average molecular weight difference (ΔMw) of about 1,000 g/mol or less, as calculated by Equation 2:
Weight average molecular weight difference (Δ Mw )= Mw 0 −Mw 2   [Equation 2]

where Mw 0 is a weight average molecular weight (Mw) of the resin composition, as measured by gel permeation chromatography (GPC), and Mw 2 is a weight average molecular weight (Mw) of the resin composition, as measured on a specimen by GPC, in which the specimen is prepared in pellet form by re-extrusion of the resin composition once at 170° C. and left under conditions of 80° C. and 90% RH for 16 hours.

7 . The polyphosphonate resin composition according to claim 1 , wherein the polyphosphonate resin composition has a yellowness index difference (ΔYI) of about 5 or less, as calculated by Equation 3:
Yellowness index difference (Δ YI )= YI 1 −YI 0   [Equation 3]

where YI 0 is an initial yellowness index (YI) of a 2.5 mm thick specimen, as measured in accordance with ASTM D1925, in which the specimen is prepared through injection-molding of the resin composition at an injection barrel temperature of 200° C. without leaving the resin composition in a cylinder, and YI 1 is an initial yellowness index (YI) of a 2.5 mm thick specimen, as measured in accordance with ASTM D1925, in which the specimen is prepared by leaving the resin composition in the cylinder for 5 minutes and injection-molding the resin composition at an injection barrel temperature of 200° C.

8 . The polyphosphonate resin composition according to claim 1 , wherein the polyphosphonate resin composition has a flame retardancy of V-0 or higher, as measured on a 0.7 mm thick specimen in accordance with a UL-94 vertical test method.

9 . The polyphosphonate resin composition according to claim 1 , wherein the polyphosphonate resin composition has a notched Izod impact strength of about 1 to about 10 kgf·cm/cm, as measured on a ⅛″ thick specimen in accordance with ASTM D256.

10 . A molded article prepared from the polyphosphonate resin composition according to claim 1 .

Assignees

• Lotte Chemical Corp

Inventors

• Bae Jin Yong
• Lee Jung Jae
• Chi Jun Ho
• Kwon O Sung

Classifications

• C08K5/526

  with hydroxyaryl compounds · CPC title

• C08G79/04 Primary

  Phosphorus linked to oxygen or to oxygen and carbon · CPC title

• C08L2201/02

  Flame or fire retardant/resistant · CPC title

• C08L85/02 Primary

  containing phosphorus · CPC title