Composition comprising polyester and polyolefin

Patent metadata

Field	Value
Publication number	US-12559622-B2
Application number	US-202017767741-A
Country	US
Kind code	B2
Filing date	Oct 9, 2020
Priority date	Oct 11, 2019
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

The invention relates to a composition comprising A) a first polyester, B) a first polyolefin, C) a compatibilizer and D) a lubricant, wherein D) comprises a siloxane polymer having a viscosity of at least 10000 cSt and an optional second polyester and/or an optional second polyolefin, the total amount of A) and B) with respect to the total composition is at least 80 wt %, the amount of C) with respect to the total composition is 0.1 to 15 wt % and the amount of D) with respect to the total composition is 0.1 to 5.0 wt %.

First claim

The invention claimed is:

1 . A composition comprising A) a first polyester, B) a first polyolefin, C) a compatibilizer and D) a lubricant, wherein
D) comprises a siloxane polymer having a viscosity of at least 10000 cSt and an optional second polyester and/or an optional second polyolefin, the total amount of A) and B) with respect to the total composition is at least 80 wt %, the amount of C) with respect to the total composition is 0.1 to 15 wt % and the amount of D) with respect to the total composition is 0.1 to 5.0 wt % and wherein the amount of B) with respect to the total composition is at most 40 wt %, wherein C) comprises
a copolymer of ethylene and a comonomer selected from the group consisting of an unsaturated carboxylic acid and an anhydrate of the unsaturated carboxylic acid;
an ester of the unsaturated carboxylic acid;
a glycidylester of an unsaturated monocarboxylic acid;
a monoglycidylester or polyglycidylester of an unsaturated polycarboxylic acid; and
an unsaturated glycidylether;

a random terpolymer of ethylene, butylacrylate and maleic anhydride; or
an ethylene-acrylate copolymer which includes an acrylate represented by formula (I) or (II) as a comonomer:
CH 2 ═CR 1 —COO—(CH 2 ) n —OH  (I)

CH 2 ═CR 1 —COO—(CH 2 ) m —CHOH—CH 2 OH  (II)

wherein R 1 is H or C1-C5 linear or branched alkyl, n is an integer of 1-10 and m is an integer of 0-10, wherein the composition has a melt volume flow rate (MVR) of at least 5 cc/10 min, as determined by ISO1133 (2.16 kg, 265° C., 300 seconds).

2 . The composition according to claim 1 , wherein the siloxane polymer is selected from polyalkylsiloxanes, polyarylsiloxanes and polyalkylarylsiloxanes.

3 . The composition according to claim 1 , wherein the viscosity of the siloxane polymer is 10000 to 15,000,000 cSt.

4 . The composition according to claim 1 , wherein the amount of the siloxane polymer with respect to D) is 50 to 100 wt %.

5 . The composition according to claim 1 , wherein D) comprises the second polyolefin.

6 . The composition according to claim 5 , wherein D) is in an amount of 1 to 50 wt % with respect to C).

7 . The composition according to claim 1 , wherein the amount of A) with respect to the total composition is at least 50 wt %.

8 . The composition of claim 7 , wherein the amount of A) with respect to the total composition is at least 75 wt %.

9 . The composition according to claim 1 , wherein A) is selected from the group consisting of polyethylene terephthalate (PET) and polybutylene terephthalate (PBT) and a combination thereof.

10 . The composition according to claim 1 , wherein A) is a recycled polyethylene terephthalate.

11 . The composition according to claim 1 , wherein the amount of B) with respect to the total composition is at most 35 wt %.

12 . The composition of claim 11 , wherein the amount of B) with respect to the total composition is 5 to 22.5 wt %.

13 . The composition according to claim 1 , wherein B) is selected from the group consisting of a low density polyethylene (LDPE), a linear low density polyethylene (LLDPE), a high density polyethylene (HDPE), polypropylene (PP), an elastomeric copolymer of ethylene and an α-olefin having 4 to 10 carbon atoms, and a combination thereof.

14 . The composition according to claim 13 , wherein B) is an elastomeric copolymer of ethylene and an α-olefin having 4 to 10 carbon atoms having a density of 0.850 to 0.910 g/cm 3 according to ASTM D792.

15 . The composition according to claim 14 , wherein the composition has a static friction of 0.30 to 0.70 according to ASTM D-3702 (plastic on plastic, pressure 40 kPa, velocity 50 mps, oscillation 30°/0.5 hertz, duration 120 min) and/or a dynamic friction of 0.10 to 0.25 according to ASTM D-3702 (plastic on plastic, pressure 40 kPa, velocity 50 mps, oscillation 30°/0.5 hertz, duration 120 min).

16 . The composition according to claim 1 , where in the siloxane polymer is a polydimethylsiloxane.

17 . The composition according to claim 1 , wherein the viscosity of the siloxane polymer is at least 15,000 cSt and at most 1,000,000 cSt.

18 . The composition according to claim 1 , wherein the viscosity of the siloxane polymer is at least 20,000 cSt and at most 50,000 cSt.

19 . The composition according to claim 1 , wherein C) comprises a copolymer of ethylene and a glycidylester of an unsaturated monocarboxylic acid.

20 . The composition according to claim 1 , wherein C) comprises a copolymer of ethylene and glycidylmethacrylate.

Assignees

• Sabic Global Technologies Bv

Inventors

• Venderbosch Robert Walter
• Boonman Rob
• Martens Johannes Peter Antonius
• Van De Wetering Karin Irene

Classifications

• C08G63/183

  Terephthalic acids · CPC title

• C08G77/04

  Polysiloxanes · CPC title

• C08L67/02 Primary

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) · CPC title