Polymeric compositions

Patent metadata

Field	Value
Publication number	US-10913854-B2
Application number	US-201515512078-A
Country	US
Kind code	B2
Filing date	Sep 15, 2015
Priority date	Sep 17, 2014
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

A composition comprising a thermoplastic polymer, cellulosic material and a functional filler, a composite formed therefrom, a masterbatch from which the composition may be formed, a method of making the composition and composite, and uses of the functional filler in a composition comprising thermoplastic polymer and cellulosic material.

First claim

The invention claimed is:

1. A composition comprising
(a) a thermoplastic polymer,
(b) a cellulosic material, and
(c) a functional filler;
wherein:
the thermoplastic polymer comprises a first polymer and a second polymer;
at least one of the first and second polymers comprises high-density polyethylene (HDPE);
the HDPE is present in an amount ranging from about 10% to about 70% by weight based on the total weight of the composition;
the first polymer is a recycled polymer, and the second polymer is a virgin polymer;
at least 50% by weight of the thermoplastic polymer is recycled polymer;
the functional filler comprises an inorganic particulate and a surface treatment agent on a surface of the inorganic particulate; and
the surface treatment agent comprises a first compound, wherein the first compound has a formula (1):
A-(X—Y—CO) m (O—B—CO) n OH  (1)

wherein
A is a moiety containing a terminating ethylenic bond with one or two adjacent carbonyl groups;
X is O and m is 1 to 4 or X is N and m is 1;
Y is C1-18-alkylene or C2-18-alkenylene;
B is C2-6-alkylene; and
n is 0 to 5;
provided that when A contains two carbonyl groups adjacent to the ethylenic group, X is N.

2. The composition according to claim 1 , wherein the recycled polymer comprises recycled post-consumer polymer waste.

3. The composition according to claim 1 wherein at least one of the first and second polymers comprises polyethylene and optionally polypropylene.

4. The composition according to claim 1 , wherein at least a portion of the thermoplastic polymer is coupled to the inorganic particulate via the surface treatment agent.

5. The composition according to claim 3 , wherein the polyethylene is coupled to the inorganic particulate via the surface treatment agent.

6. The composition according to claim 1 , wherein the thermoplastic polymer comprises at least two polyethylene polymers that are coupled to the inorganic particulate via the surface treatment agent.

7. The composition according to claim 6 , wherein the first of the at least two polyethylene polymers has a melt flow rate (MFR) of less than 0.75 g/10 mins @ 190° C./2.16 kg.

8. The composition according to claim 1 , wherein the HDPE of the first polyethylene polymer is present in an amount ranging from about 10% to about 30% by weight based on the total weight of the composition.

9. The composition according to claim 1 , wherein the HDPE of the first polyethylene constitutes from about 30% to about 70% by weight of the total amount of thermoplastic polymer.

10. The composition according to claim 1 , wherein the inorganic particulate comprises calcium carbonate.

11. The composition according to claim 1 , wherein the composition further comprises a secondary filler that is not treated with a surface treatment agent.

12. The composition according to claim 1 , wherein the composition comprises from about 10% to about 80% by weight thermoplastic polymer, from about 20% to about 80% cellulosic material, and from about 1% to about 70% by weight functional filler, based on the total weight of the composition.

13. The composition according to claim 12 , wherein the weight ratio of cellulosic material to thermoplastic polymer is greater than about 1:1.

14. The composition according to claim 12 , wherein the composition comprises from about 20% to about 50% by weight thermoplastic polymer, from about 40% to about 70% cellulosic material, and from about 1% to about 50% by weight functional filler, based on the total weight of the composition.

15. The composition according to claim 12 , wherein the composition comprises from about 2% to about 20% by weight of the functional filler and further comprises from about 2 to about 25% by weight of a secondary filler.

16. The composition according to claim 15 , wherein the secondary filler is uncoated talc, carbon black or mica.

17. The composition according to claim 1 , wherein the composition further comprises an antioxidant and/or a colourant.

18. A masterbatch from which the composition according to claim 17 is formed.

Assignees

• Imerys Minerals Ltd
• Imertech Sas

Inventors

• Slater John
• Herring George

Classifications

• C08L2207/066

  LDPE (radical process) · CPC title

• C08L2207/062

  HDPE · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C08L97/02 Primary

  Lignocellulosic material, e.g. wood, straw or bagasse {(manufacture of articles made from lignocellulosic material by dry processes B27N)} · CPC title

• C08L23/12

  Polypropene · CPC title