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US 9,803,113 B2Granted
Adhesive compositions of propylene-based and ethylene-based polymers
AssigneeExxonMobil Chemical Patents Inc.
InventorMun F. Tse
Life of this patent
Estimating the term…
Abstract
The present invention is related to adhesive compositions and their applications. In particular, the adhesive compositions described herein comprise a propylene-based polymer and an ethylene-based polymer with varying comonomer content.
Claims24
An adhesive composition comprising:
- (a) at least one propylene-based polymer comprising more than 50 wt % of propylene-derived units and at least one first comonomer-derived units, said propylene-based polymer having a Brookfield viscosity of at least 250 mPa·sec measured by ASTM D-3236 at 190° C., a heat of fusion of at least 60 J/g measured by differential scanning calorimetry and a characteristic time (tc) in the range from 1 to 1000 nanoseconds;
- (b) an ethylene-based polymer comprising more than 50 wt % ethylene-derived units and at least one second comonomer-derived units, said ethylene-based polymer having a Brookfield viscosity of at least 250 mPa·sec measured by ASTM D-3236 at 190° C., a heat of fusion in the range from 1 to 100 J/g measured by differential scanning calorimetry and a characteristic time (tc) in the range from 1 to 1500 nanoseconds;
- wherein said at least one first comonomer and said at least one second comonomer are the same or different;
- wherein said characteristic time (tc) in units of nanoseconds is defined by Equation 1:
- t
- c
- =
- BV
- Density
- ×
- Heat
-
-
- of
-
-
- Fusion
- (
- Equation
-
-
- 1
- )
- wherein said BV is the Brookfield viscosity of said propylene-based polymer or said ethylene-based polymer measured by ASTM D-3236 at 190° C. in units of mPa·sec, said Density is the density of said propylene-based polymer or said ethylene-based polymer in units of g/cm3 at 23° C., and said Heat of Fusion is the heat of fusion of said propylene-based polymer or said ethylene-based polymer in units of J/g.
21 more elements
An adhesive composition comprising:
- (a) a propylene-based polymer comprising from 50 wt % to 100 wt % propylene-derived units and from 0 wt % to 50 wt % ethylene-derived units, said propylene-based polymer having a Brookfield viscosity in the range of 250 to 25,000 mPa·sec measured by ASTM D-3236 at 190° C., a heat of fusion in the range of 60 to 150 J/g measured by differential scanning calorimetry at second melt with a heating rate of 10° C./min and a characteristic time (tc) in the range from 1 to 1000 nanoseconds;
- (b) an ethylene-based polymer comprising from 50 wt % to 100 wt % ethylene-derived units and from 0 wt % to 50 wt % octene-derived units, said ethylene-based polymer having a Brookfield viscosity in the range of 250 to 50,000 mPa·sec measured by ASTM D-3236 at 190° C., a heat of fusion in the range of 1 to 100 J/g measured by differential scanning calorimetry at second melt with a heating rate of 10° C./min and a characteristic time (tc) in the range from 1 to 1500 nanoseconds;
- wherein said characteristic time (tc) is defined by Equation 1:
- t
- c
- =
- BV
- Density
- ×
- Heat
-
-
- of
-
-
- Fusion
- (
- Equation
-
-
- 1
- )
- wherein said BV is the Brookfield viscosity of said propylene-based or said ethylene-based polymer measured by ASTM D-3236 at 190° C. in units of mPa·sec, said Density is the density of said propylene-based or said ethylene-based polymer in units of g/cm3 at 23° C., and said Heat of Fusion is the heat of fusion of said propylene-based or said ethylene-based polymer in units of J/g.
20 more elements
A hot melt adhesive composition comprising:
- (a) 40 wt % to 60 wt % of a propylene-based polymer based on the weight of said hot melt adhesive, said propylene-based polymer comprising from 50 wt % to 100 wt % propylene- derived units, and 0 wt % to 50 wt % ethylene-derived units, said propylene-based polymer having a Brookfield viscosity in the range of 250 to 25,000 mPa·sec measured by ASTM D-3236 at 190° C., a heat of fusion in the range of 60 to 150 J/g measured by differential scanning calorimetry at second melt with a heating rate of 10° C./min and a characteristic time (tc) in the range from 1 to 1000 nanoseconds;
- (b) 40 wt % to 60 wt % of an ethylene-based polymer based on the weight of said hot melt adhesive, said ethylene-based polymer comprising from 50 wt % to 100 wt % ethylene- derived units and from 0 wt % to 50 wt % octene-derived units, said ethylene-based polymer having a Brookfield viscosity in the range of 250 to 50,000 mPa·sec measured by ASTM D-3236 at 190° C., and a heat of fusion in the range of 1 to 100 J/g measured by differential scanning calorimetry at second melt with a heating rate of 10° C./min and a characteristic time (tc) in the range from 1 to 1500 nanoseconds;
- wherein said characteristic time (tc) is defined by Equation 1:
- t
- c
- =
- BV
- Density
- ×
- Heat
-
-
- of
-
-
- Fusion
- (
- Equation
-
-
- 1
- )
- wherein said BV is the Brookfield viscosity of said propylene-based or said ethylene-based polymer measured by ASTM D-3236 at 190° C. in units of mPa·sec, said Density is the density of said propylene-based or said ethylene-based polymer in units of g/cm3 at 23° C., and said Heat of Fusion is the heat of fusion of said propylene-based or said ethylene-based polymer in units of J/g;
- and
- (c) at least one of a functionalized component, a tackier component, a process oil component, a wax component, an antioxidant component, or a mixture thereof.
22 more elements
Dependencies are inferred from the claim text.