US 10,703,901 B2 · Glass fiber-reinforced flame retardant PBT composition and preparation method thereof

Abstract

The present invention discloses a glass fiber-reinforced flame retardant PBT composition which includes following components in parts by weight: 35 to 71 parts of a PBT resin; 5 to 30 parts of a flame retardant; and 5 to 50 parts of a glass fiber; based on a total weight of the glass fiber-reinforced flame retardant PBT composition, a content of tetrahydrofuran is less than/equal to 500 ppm and more than/equal to 10 ppm. In the present invention, when the content of tetrahydrofuran which is selected to be added in a formula of the glass fiber-reinforced flame retardant PBT composition, is less than/equal to 500 ppm and more than/equal to 10 ppm based on the total weight of the glass fiber-reinforced flame retardant PBT composition, a flowability and injection molding appearance of the glass fiber-reinforced flame retardant PBT composition can be apparently improved.

Claims18

Dependent claims

A glass fiber-reinforced flame retardant PBT composition, comprising following components in parts by weight:

a PBT resin
35 to 71 parts;
a flame retardant
5 to 30 parts;
and
a glass fiber
5 to 50 parts,
a content of tetrahydrofuran less than/equal to 500 ppm and more than/equal to 10 ppm based on a total weight of the glass fiber-reinforced flame retardant PBT composition;
and
wherein, flowability and injection molding appearance of the glass fiber-reinforced flame retardant PBT composition is improved as compared to when the content of tetrahydrofuran is more than 500 ppm based on the total weight of the glass fiber-reinforced flame retardant PBT composition,
wherein the PBT resin has an intrinsic viscosity of 0.5 dl/g to 1.5 dl/g and a density of 1.30 g/cm3 to 1.33 g/cm3.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/761,333Filed 16 Nov 2016

Priority

CN 2015 1 082095524 Nov 2015

Published

US 2018/0273745 A127 Sep 2018

Granted

7 Jul 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

C08L 67/02
Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain ; Compositions of derivatives of such polymers:…
C08J 5/043
With inorganic fibres: with glass fibres
C08J 3/215
The polymer being premixed with a liquid phase: at least one additive being also premixed with a liquid phase
C08J 2367/02
Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers:…

Glass fiber-reinforced flame retardant PBT composition and preparation method thereof

Life of this patent

Glass fiber-reinforced flame retardant PBT composition and preparation method thereof

Life of this patent

Abstract

Claims18