# US 9,040,616 B2 · Bleed resistant, oil-extended olefin block copolymer composition with microcrystalline wax

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- Number: US 9,040,616 B2
- Document ID: US9040616B2
- Status: Granted
- Kind: B2
- Application number: 13/976,139
- Filed: 2011-12-14
- Published: 2013-10-24
- Granted: 2015-05-26
- Earliest claimed: 2010-12-30
- Assignees: Dow Global Technologies LLC
- Applicants: Robert T. Johnston; Ashish Batra; Wenbin Liang
- Inventors: Robert T. Johnston; Ashish Batra; Wenbin Liang
- Web page: https://patentgrep.com/patent/US9040616B2

## CPC

- C08L 53/00: Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L 23/0815: {with aliphatic 1-olefins containing one carbon-to-carbon double bond}
- C08L 91/00: Compositions of oils, fats or waxes; Compositions of derivatives thereof
- C08L 91/06: Waxes
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

Disclosed are oil-extended olefin block copolymer compositions with microcrystalline wax. The microcrystalline wax reduces oil-bleed while maintaining composition softness.

## Claims

### Claim 1

An oil-extended olefin block copolymer composition comprising:
from 30 wt % to 40 wt % of a polymer, wherein the polymer consists of an ethylene/α-olefin multi-block copolymer as the only polymeric component of the composition;
from 45 wt % to 55 wt % of an oil;
from 10 wt % to 30 wt % of a microcrystalline wax; and
the composition is halogen-free and has a Shore A hardness from 5 to 50 and a normalized oil bleed index (NOBI) from 1 to 60 after 3 weeks at 23° C.

### Claim 2 (depends on 1)

The composition of claim 1 wherein the olefin block copolymer has a density from about 0.85 g/cc to about 0.88 g/cc.

### Claim 3 (depends on 1)

The composition of claim 1 wherein the composition is filler-free.

### Claim 4 (depends on 1)

The composition of claim 1 wherein the oil and the microcrystalline wax are components of an oil/microcrystalline wax pre-mix.

### Claim 5 (depends on 4)

The composition of claim 4 wherein the pre-mix comprises from about 60 wt % to about 80 wt % oil and from about 40 wt % to about 20 wt % microcrystalline wax.

### Claim 6 (depends on 1)

The composition of claim 1 having a normalized oil-bleed index of less than 30 after 1 week at 23° C.

### Claim 7 (depends on 1)

The composition of claim 1 having a normalized oil-bleed index (NOBI) of less than 30 after 3 weeks at 23° C.