Adhesive compositions containing functionalized ethylene/alpha-olefin interpolymers and rosin-based tackifiers

Patent metadata

Field	Value
Publication number	US-10450484-B2
Application number	US-201414894832-A
Country	US
Kind code	B2
Filing date	Jul 24, 2014
Priority date	Jul 24, 2013
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

The invention provides a composition comprising the following components:
A) an anhydride and/or carboxylic acid functionalized ethylene/alpha-olefin interpolymer comprising the following properties:
i) a melt viscosity (177° C.) less than, or equal to, 50,000 cP; and ii) a density from 0.855 to 0.895 g/cc;

B) a rosin-based tackifier; and
wherein the tackifier is selected from the following:

i) a partially hydrogenated glycerol ester;
ii) a fully hydrogenated pentaerythritol ester;
iii) a fully hydrogenated glycerol ester;
iv) a non-hydrogenated ester with a Tg from 30° C. to 50° C.; or
v) a combination thereof.

First claim

The invention claimed is:

1. A composition comprising the following components:
A) a maleic anhydride functionalized ethylene/octene copolymer comprising the following properties:
i) a melt viscosity (at 177° C.) less than, or equal to, 50,000 cP; and
ii) a density from 0.855 to 0.895 g/cc;
iii) a molecular weight distribution (Mw/Mn) greater than, or equal to, 2.5;

B) a rosin-based tackifier selected from the group consisting of a fully hydrogenated pentaerythritol ester, a fully hydrogenated glycerol ester, and combinations thereof;
C) an ethylene/octene copolymer having
(i) a molecular weight distribution (Mw/Mn) less than, or equal to, 2.3,
(ii) a melt viscosity (at 177° C.) from 5,000 cP to 40,000 cP;

wherein the weight ratio of component A to component C is 4:1 and the weight ratio of components A and C to component B is 1:1; and
the composition is transparent.

2. The composition of claim 1 , wherein the composition comprises ≥70 wt % of the sum weight of component A and component B, based on the weight of the composition.

3. The composition of claim 1 , wherein the ethylene/octene copolymer of component C has a density from 0.855 to 0.885 g/cc.

4. The composition of claim 1 , wherein the composition has a melt viscosity (at 177° C.) from 100 to 2000 mPa·s.

5. An article comprising the composition of claim 1 .

6. The article of claim 5 , further comprising a substrate.

7. The article of claim 6 , wherein the substrate is selected from the group consisting of the following: a coated substrate, a recycled paper, and combinations thereof.

8. The article of claim 6 , wherein the substrate is selected from the group consisting of the following: a wax coated Kraft or carton, a polyethylene coated Kraft or carton, a biaxially oriented polypropylene (BOPP) film laminated Kraft or carton, a polypropylene (PP) film laminated Kraft or carton, a polyethylene terephthalate (PET) film laminated Kraft or carton, a clay coated Kraft or carton, a lacquer coated Kraft or carton, and combinations thereof.

9. The composition of claim 1 , wherein the composition comprises ≥75 wt % of the sum weight of component A and component B, based on the weight of the composition.

Assignees

• Dow Global Technologies Llc

Inventors

• Chen Livia Li Wen
• Yalvac Selim

Classifications

• C09J2467/006

  in the substrate · CPC title

• C09J2423/04

  Presence of homo or copolymers of ethene · CPC title

• C09J151/06

  grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond · CPC title

• C09J2493/00

  Presence of natural resin · CPC title

• C09J2491/006

  in the substrate · CPC title