Polyolefin-based compositions having polyisobutylenes, adhesives, and related multi-layered structures thereof

Patent metadata

Field	Value
Publication number	US-10150894-B2
Application number	US-201715406430-A
Country	US
Kind code	B2
Filing date	Jan 13, 2017
Priority date	Sep 23, 2014
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

A polyolefin-based composition made from or containing (A) a first polymer composition made from or containing a polyolefin grafted with an unsaturated monomer, (B) a second polymer composition made from or containing a polyethylene, and (C) a third polymer composition made from or containing (i) a first polyisobutylene and (ii) a second polyisobutylene. The first polyisobutylene has a Viscosity Average Molecular Weight (VAMW1), and the second polyisobutylene has a Viscosity Average Molecular Weight (VAMW2), wherein VAMW1≠VAMW2. The polyolefin-based composition is useful as an adhesives or a tie-layer adhesive composition for multi-layered structures. In particular, the composition is useful as an adhesive to bind a metal layer to a dissimilar substrate.

First claim

What is claimed is:

1. A polyolefin-based composition comprising:
(A) about 1 to about 30 wt. %, relative to the total weight of the polyolefin-based composition, of a first polymer composition comprising: a polyolefin grafted with an unsaturated monomer;
(B) about 50 to about 80 wt. %, relative to the total weight of the polyolefin-based composition, of a second polymer composition comprising a high density polyethylene; and
(C) about 10 to about 40 wt. %, relative to the total weight of the polyolefin-based composition, of a third polymer composition comprising:
(i) a first polyisobutylene having a Viscosity Average Molecular Weight (VAMW 1 ); and
(ii) a second polyisobutylene having a Viscosity Average Molecular Weight (VAMW 2 )
wherein VAMW 2 ≥(5×VAMW 1 ).

2. The polyolefin-based composition of claim 1 , further comprising an additives composition having one or more additives.

3. The polyolefin-based composition of claim 1 , wherein the polyolefin grafted with an unsaturated monomer is a polyethylene grafted with maleic anhydride.

4. The polyolefin-based composition of claim 1 , wherein the polyethylene is a high density polyethylene.

5. The polyolefin-based composition of claim 1 , wherein the first polyisobutylene and the second polyisobutylene are present in an about 50:50 ratio.

6. The polyolefin-based composition of claim 1 , wherein
(A) VAMW 1 is from about 3*10 4 to about 1*10 5 grams per mole; and
(B) VAMW 2 is from about 2*10 5 to about 5*10 6 grams per mole.

7. The polyolefin-based composition of claim 1 , wherein |VAMW 2 −VAMW 1 |is from about 3*10 5 to about 1*10 6 grams per mole.

8. The polyolefin-based composition of claim 1 further comprising:
(A) from about 1 to about 30 weight percent of the first polymer composition, relative to the total weight of the polyolefin-based composition;
(B) from about 50 to about 80 weight percent of the second polymer composition, relative to the total weight of the polyolefin-based composition;
(C) from about 10 to about 25 weight percent of the third polymer composition, relative to the total weight of the polyolefin-based composition; and
(D) from 0 to about 5 weight percent of an additives composition, relative to the total weight of the polyolefin-based composition.

9. The polyolefin-based composition of claim 8 , wherein when adhered to a metal layer, the polyolefin-based composition has a roller peel adhesion (ASTM D3167) in the range of about 60 pounds per linear inch to about 70 pounds per linear inch, after 1-day aging at room temperature.

10. The polyolefin-based composition of claim 9 , wherein the metal layer is an epoxy-coated aluminum.

11. The polyolefin-based composition of claim 8 , wherein when adhered to a metal layer, the polyolefin-based composition has a roller peel adhesion (ASTM D3167) in the range of about 35 pounds per linear inch to about 45 pounds per linear inch, after boiling 8 hours in water.

12. The polyolefin-based composition of claim 11 , wherein the metal layer is an epoxy-coated aluminum.

13. The polyolefin-based composition of claim 8 , wherein when adhered to a metal layer, the polyolefin-based composition has a roller peel adhesion (ASTM D3167) in the range of about 40 pounds per linear inch to about 50 pounds per linear inch, after boiling 8 hours in water.

14. The polyolefin-based composition of claim 13 , wherein the metal layer is a chromium-treated aluminum.

15. An adhesive comprising:
(A) a polyolefin-based composition comprising:
(i) from about 1 to about 30 weight percent of a first polymer composition comprising: a polyolefin grafted with an unsaturated monomer, relative to the total weight of the polyolefin-based composition;
(ii) from about 50 to about 80 weight percent of a second polymer composition comprising: a polyethylene, relative to the total weight of the polyolefin-based composition;
(iii) from about 10 to about 40 weight percent of a third polymer composition, relative to the total weight of the polyolefin-based composition, comprising:
(a) a first polyisobutylene having a Viscosity Average Molecular Weight (VAMW 1 ); and
(b) a second polyisobutylene having a Viscosity Average Molecular Weight (VAMW 2 )
wherein VAMW 2 ≥(5×VAMW 1 ); and

(iv) from 0 to about 5 weight percent of an additives composition, relative to the total weight of the polyolefin-based composition.

16. A multi-layered structure comprising:
(A) a tie-layer adhesive comprising:
(i) a polyolefin-based composition comprising:
(a) from about 1 to about 30 weight percent of a first polymer composition comprising: a polyolefin grafted with an unsaturated monomer, relative to the total weight of the polyolefin-based composition;
(b) from about 50 to about 80 weight percent of a second polymer composition comprising: a polyethylene, relative to the total weight of the polyolefin-based composition;
(c) from about 10 to about 40 weight percent of a third polymer composition, relative to the total weight of the polyolefin-based composition, comprising:
(1) a first polyisobutylene having a Viscosity Average Molecular Weight (VAMW 1 ); and
(2) a second polyisobutylene having a Viscosity Average Molecular Weight (VAMW 2 )
 wherein VAMW 2 ≥(5×VAMW 1 ); and

(d) from 0 to about 5 weight percent of an additives composition, relative to the total weight of the polyolefin-based composition; and

(B) a metal layer.

Assignees

• Equistar Chem Lp

Inventors

• Botros Maged G

Classifications

• 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

• C09J2400/163

  in the substrate · CPC title

• C08L2207/062

  HDPE · CPC title

• C08L23/06

  Polyethylene · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title