Flame retardant long glass fibre reinforced polypropylene composition

Patent metadata

Field	Value
Publication number	US-2017349732-A1
Application number	US-201515538773-A
Country	US
Kind code	A1
Filing date	Dec 16, 2015
Priority date	Dec 22, 2014
Publication date	Dec 7, 2017
Grant date	—

Abstract

The present invention relates to pellets of a flame retardant long glass fibre reinforced polypropylene composition having a core containing glass fibres and a sheath of a polypropylene compound comprising a flame retardant composition and surrounding said core, wherein the flame retardant composition comprises a mixture of an organic phosphate compound, an organic phosphoric acid compound and zinc oxide. The invention further relates to flame retardant moulding compositions and articles manufactured using the pellets or the moulding compositions.

First claim

1 . Pellets of a flame retardant long glass fibre reinforced polypropylene composition having a core containing glass fibres and an impregnating agent, and a sheath of a polypropylene compound comprising a flame retardant composition and surrounding said core, wherein the flame retardant composition comprises a mixture of an organic phosphate compound, an organic phosphoric acid compound and zinc oxide.

2 . Pellets according to claim 1 , wherein the flame retardant glass fibre reinforced polypropylene composition comprises
from 25-80 wt. % of polypropylene compound, from 10-40 wt. % of glass fibres, from 10-35 wt. % of a flame retardant composition, the weight percentages being based on the weight of the flame retardant glass fibre reinforced polypropylene composition.

3 . Pellets according to claim 1 , wherein the amount of impregnating agent is from 5 to 15 wt. % based on the weight of the glass fibres.

4 . Pellets according to claim 1 , wherein the melt flow rate of the polypropylene compound, measured in accordance with ISO 1133 (2.16 kg, 230° C.) is from 10-100 g/10 min.

5 . Moulding composition comprising:
pellets of a long glass fibre reinforced polypropylene composition having a core containing glass fibres and an impregnating agent, and a sheath of a first polypropylene compound surrounding said core, wherein the glass fibre reinforced polypropylene composition comprises from 10-70 wt. % of glass fibres and from 90-30 wt. % of polypropylene compound, based on the weight of the glass fibre reinforced polypropylene composition, said glass fibre reinforced polypropylene composition not containing a flame retardant composition, a flame retardant polypropylene dilution composition comprising a second polypropylene compound containing a flame retardant composition comprising a mixture of an organic phosphate compound, an organic phosphoric acid compound and zinc oxide.

6 . The moulding composition of claim 5 , wherein the flame retardant polypropylene dilution composition consists of the pellets of a flame retardant long glass fibre reinforced polypropylene composition having a core containing glass fibres and an impregnating agent, and a sheath of a polypropylene compound comprising a flame retardant composition and surrounding said core, wherein the flame retardant composition comprises a mixture of an organic phosphate compound, an organic phosphoric acid compound and zinc oxide.

7 . The moulding composition of claim 5 , wherein the core of the pellets not containing a flame retardant composition comprises said impregnating agent in an amount from 5 to 15 wt. % based on the weight of the glass fibres.

8 . The moulding composition of claim 5 , wherein the melt flow rate of the first polypropylene compound, measured in accordance with ISO 1133 (2.16 kg, 230° C.) is from 10-100 g/10 min.

9 . Moulding composition comprising:
pellets according to claim 1 , pellets of a dilution polypropylene composition containing a flame retardant composition comprising a mixture of an organic phosphate compound, an organic phosphoric acid compound and zinc oxide.

10 . The moulding composition of claim 9 , wherein the moulding composition comprises:
from 35-80 wt. % of polypropylene compound, from 10-40 wt. % of glass fibres, from 10-35 wt. % of a flame retardant composition, the weight percentages being based on the weight of the moulding composition.

11 . Flame retardant long glass fibre reinforced polypropylene composition according to claim 1 , having a UL94-V0 rating at 3.2 mm.

12 . Flame retardant long glass fibre reinforced polypropylene composition according to claim 1 , having a UL94-V0 rating at 1.6 mm, wherein the amount of flame retardant composition is selected according to the following formula I
FR≧0.5×GF+5  I
wherein
GF=amount of glass fibre in wt. %
FR=amount of flame retardant composition in wt. %
provided the amount of glass fibres is at least 15 wt %.

13 . A method for manufacturing an article comprising moulding the pellets according to claim 1 , form the moulded article.

14 . Article obtained by moulding the pellets according to claim 1 .

15 . The article of claim 14 having a UL94-V0 rating at 1.6 mm.

16 . The method of claim 13 , wherein the article is an interior or exterior automotive article or is comprised in a housing for a building integrated solar panel or a building integrated photo-voltaic panel.

17 . The flame retardant long glass fibre reinforced polypropylene composition according to claim 11 , having a UL94-V0 rating 2.0 mm.

Assignees

• Sabic Global Technologies Bv

Inventors

• Steenbakkers-Menting Henrica Norberta Alberta Maria
• Van Giesen Roland
• Van Der Ven Maud Corrina Willie
• Bercx Rick Robert Emilie

Classifications

• C08L2201/02

  Flame or fire retardant/resistant · CPC title

• C08J5/10

  characterised by the additives used in the polymer mixture · CPC title

• B29B9/14 Primary

  fibre-reinforced · CPC title

• B29C48/0022

  combined with cutting · CPC title

• B29C48/04

  Particle-shaped (making granules B29B9/00) · CPC title