Polyester for profile extrusion and/or pipe extrusion

Patent metadata

Field	Value
Publication number	US-10128021-B2
Application number	US-201414777875-A
Country	US
Kind code	B2
Filing date	Mar 7, 2014
Priority date	Mar 18, 2013
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

Thermoplastic molding compositions containing
A) from 29 to 99.99% by weight of a polyester, B) from 0.01 to 3.0% by weight of an alkali metal salt of nitrous acid or of phosphoric acid or of carbonic acid, or a mixture of these, based on 100% by weight of A) and B), and C) from 0 to 70% by weight of further additives, where the sum of the % by weight values for A) to C) is 100%.

The compositions are used in the production of cable sheathing or optical waveguide sheathing via blowmolding, profile extrusion, and/or tube extrusion.

First claim

The invention claimed is:

1. A method of producing cable sheathing or optical waveguide sheathing comprising
blowmolding, profile extruding, and pipe extruding a
thermoplastic molding compositions comprising
A) from 29 to 99.99% by weight of a polyester,
B) from 0.01 to 3.0% by weight of an alkali metal salt of nitrous acid, phosphoric acid, carbonic acid, or a mixture of these,
based on 100% by weight of A) and B), and
C) from 0 to 70% by weight of further additives, where the sum of the % by weight values for A) to C) is 100,
where the alkali metal of component B) is composed of sodium or potassium, or of a mixture of these.

2. The method according to claim 1 , where the intrinsic viscosity (IV) of component A) is at least 140 ml/g in accordance with ISO 1628.

3. The method according to claim 1 , where the terminal carboxy group content of component A) is from 10 to 50 meq/kg of polyester.

4. The method according to claim 1 , where component B) comprises of NaNO 2 , KNO 2 , Na 2 CO 3 , K 2 CO 3 , NaHCO 3 , KHCO 3 , Na 3 PO 4 , K 3 PO 4 , Na 2 HPO 4 , K 2 HPO 4 , or a mixture of these.

5. A method of producing cable sheathing or optical waveguide sheathing comprising
blowmolding, profile extruding, and pipe extruding a
thermoplastic molding compositions comprising
A) from 29 to 99.99% by weight of a polyester,
B) from 0.01 to 3.0% by weight of an alkali metal salt of nitrous acid, phosphoric acid, carbonic acid, or a mixture of these,
based on 100% by weight of A) and B), and
C) from 0 to 70% by weight of further additives, where the sum of the % by weight values for A) to C) is 100,
where the intrinsic viscosity (IV) of component A) is at least 140 ml/g in accordance with ISO 1628.

6. A method of producing cable sheathing or optical waveguide sheathing comprising
blowmolding, profile extruding, and pipe extruding a
thermoplastic molding compositions comprising
A) from 29 to 99.99% by weight of a polyester,
B) from 0.01 to 3.0% by weight of an alkali metal salt of nitrous acid, phosphoric acid, carbonic acid, or a mixture of these,
based on 100% by weight of A) and B), and
C) from 0 to 70% by weight of further additives, where the sum of the % by weight values for A) to C) is 100,
where the terminal carboxy group content of component A) is from 10 to 50 meq/kg of polyester.

Assignees

• Basf Se

Inventors

• Kniesel Simon
• Eibeck Peter
• Klenz Rainer

Classifications

• H01B13/24

  by extrusion {(extrusion of cables with plastic material in general B29C48/15)} · CPC title

• C08K3/28

  Nitrogen-containing compounds · CPC title

• B29L2023/00

  Tubular articles (B29L2024/00 takes precedence {; catheters B29L2031/7542}) · CPC title

• H01B13/22

  Sheathing; Armouring; Screening; Applying other protective layers (H01B13/32 takes precedence) · CPC title

• C08K3/32

  Phosphorus-containing compounds · CPC title