JP2015166470A - thermoplastic elastomer for cold and wet applications - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide thermoplastic elastomer compositions including at least one elastomeric component and at least one semi-crystalline polymer to replace PVC-based profiles, and articles made of the compositions.SOLUTION: A composition comprises: i) an ethylene/α-olefin interpolymer which has a Mooney Viscosity (ML 1+4, 125°C) greater than or equal to 55 and a ΔHf greater than or equal to 36 J/g; and ii) a high density polyethylene (HDPE), at least one oil, and at least one filler. The composition has a compression set less than 70% at 70°C as measured by ASTM D-395.

Description

REFERENCE TO RELATED APPLICATIONS This application claims the priority of US Provisional Application No. 61/263262, filed Nov. 20, 2009, the disclosure of which is incorporated herein by reference.

The present invention relates to a thermoplastic elastomer composition having a high ethylene / α-olefin polymer content or propylene-α-olefin content, more specifically a thermoplastic elastomer profile for use in low temperature and / or wet applications.

Gaskets are used in a variety of applications, such as appliances that each require a flexible gasket to seal the area between the door and the appliance body, such as refrigerators and freezers. One of the most commonly used materials for manufacturing gaskets is polyvinyl chloride (PVC). PVC gaskets become brittle at low temperatures, cracks become a problem, and installation at lower temperatures is difficult. There is also an unpleasant odor during PVC compounding and extrusion and when the finished gasket is removed from the package prior to installation. Furthermore, PVC is a vinyl chloride monomer production that can contain heavy metals, a phthalate ester plasticizer,
It is considered not an environmentally friendly material because it involves the use of heat stabilizers and processing lubricants. In addition, PVC-based gaskets, or other products, can cause disposal problems as well as potential release of toxic substances during incineration. Therefore, a material for replacing PVC-based profiles, particularly those used in large household appliances such as refrigerator and freezer gaskets, washing machines, dryers and dishwashers, is required There is a need for materials that meet standards and have improved processability and environmental compatibility. Other uses for such polymeric materials include, for example, molded articles, overmolded articles, and tube materials.

Profiles made of thermoplastics produced by a profile extrusion process are known.
The design of the composition of the thermoplastic elastomer (TPE) used for the profile requires that several properties be balanced. These properties include low viscosity at processing shear rate,
Ability to freeze rapidly so that profile can maintain dimensional stability as it leaves the die, specific compression set for elastic recovery under transportation and use conditions, ability to heat weld, better sealing Specific softness for sex is mentioned. In the production of TPE for profile applications,
To balance the required end use properties, rheological modification steps such as peroxide modification or dynamic vulcanization of thermoplastic elastomers, or styrene block copolymers (S
The use of expensive components such as compounds rich in BC) has been required. Therefore, TPE
There remains a need for TPEs for profile applications that meet all of the standards for replacing PVC-based profiles while simplifying manufacturing and design.

One embodiment of the present invention comprises at least one elastomeric polymer selected from the group of ethylene / α-olefin interpolymers and propylene / α-olefin interpolymers, component A; polypropylene homopolymer, propylene / ethylene copolymer and high density 10,000 Pa s for a composition comprising at least one semicrystalline polymer selected from the group of polyethylene, component B; at least one oil; and at least one filler and having a TMA of 1000 μm above 85 ° C. 1.6 or less and 1000 Pa
A first thermoplastic elastomer composition characterized by a shape retention index (SRI) of less than 4.5 at s is provided.

Another embodiment of the present invention is that i) Component C, Mooney viscosity greater than 55 (ML 1 + 4, 12
And a second composition comprising an ethylene / α-olefin interpolymer having a ΔHf of greater than or equal to 36 J / g; and ii) component D, high density polyethylene (HDPE).

Thermoplastic elastomer composition of the present invention The present invention relates to at least one elastomeric polymer selected from the group consisting of ethylene / α-olefin interpolymers and propylene / α-olefin interpolymers, component A; polypropylene homopolymer, propylene / At least one semi-crystalline polymer selected from the group consisting of ethylene copolymers and high density polyethylene, component B; at least one oil; and at least one filler, having a TMA at 1000 μm above 85 ° C. For compositions, no more than 1.6 at 10,000 Pa-s, and 1000 Pa
A first thermoplastic elastomer composition characterized by an SRI of less than 4.5 at -s is provided.

The present invention comprises at least one ethylene / α-olefin interpolymer having a Mooney viscosity of 55 or greater and a ΔHf of 36 J / g or greater, optionally comprising a third comonomer,
Also provided is a second composition comprising Component C; and Component D, high density polyethylene (HDPE).

Certain embodiments of the first and second compositions of the present invention satisfy a particular relationship between tan delta (tan δ) and viscosity (referred to as a shape retention index or “SRI”) over an extended temperature range.

Some embodiments of the first and second compositions of the present invention have specific tensile moduli, elongations, −10 ° C. and 4 that can be specified from various OEMs of the relevant end-use appliance.
Compression set at 0 ° C, UV resistance, weight loss on heating, Vicat softening temperature, water resistance, split resistance, antibacterial resistance, weight loss on cooling / heating cycle, odor, weld strength, chemical resistance Provided is a polymer composition that meets the properties of oil and oil resistance, feel, and crystallization temperature.

Some embodiments of the first and second compositions of the present invention include a compounded thermoplastic vulcanizate or a rheology modified reactive extrusion blend or a styrene polymer rich T
PE is not used. That is, the first and second compositions of the present invention do not contain more than 50 wt% thermoplastic vulcanizate and / or styrene polymer based on the total weight of the thermoplastic elastomer composition.

Ethylene / α-olefin interpolymers useful in components A and C Components A and C, in some embodiments, each independently comprise an ethylene / α-olefin copolymer, or blend thereof.

Components A and C are each independently ethylene / α in some embodiments of the invention.
-Containing olefin-diene interpolymers or blends thereof.

Components A and C are in some embodiments of the invention one or more ethylene / α
-Blends of olefin copolymers and one or more ethylene / [alpha] -olefin-diene interpolymers.

Ethylene / α-olefin interpolymers useful in various embodiments of the present invention, including both ethylene / α-olefin copolymers and ethylene / α-olefin-diene interpolymers, may have a ΔHf of 36 J / g or greater. it can. All values of ΔHf greater than or equal to 36 J / g are disclosed and included herein. For example, the ethylene / α-olefin interpolymer useful in the present invention is alternatively, for example, 37 J / g or more,
Alternatively, alternatives can have a ΔHf of 38 J / g or greater.

The ethylene / α-olefin interpolymers useful in components A and C can have a Mooney viscosity of 55 or greater. All values of Mooney viscosity greater than 55 are included and disclosed herein. For example, the ethylene / α-olefin interpolymer useful in the present invention has 55 or more, alternatively 57 or more, alternative 59 or more, or alternative 60 or more, or 61 or more Mooney Can have a viscosity.

The α-olefin monomers useful in the ethylene / α-olefin copolymers and interpolymers of components A and C, in certain embodiments, can be selected from the group of C _{3 to} C ₂₀ α-olefins. Preferred α-olefins for use in certain embodiments of the invention are represented by the formula CH ₂ CHR ^* , where R ^* is a linear or branched chain of 1 to 12 carbon atoms. It is an alkyl group. Examples of suitable α-olefins include propylene, isobutylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-
Examples include, but are not limited to, 1-pentene and 1-octene. A particularly preferred α-olefin is propylene.

Suitable dienes for use in the ethylene / α-olefin-diene interpolymers of components A and C include conjugated or non-conjugated, straight or branched chain, ring containing 4-20 carbons. Or a polycyclic diene. Preferred dienes are 1,
Examples include 4-pentadiene, 1,4-hexadiene, 5-ethylidene-2-norbornene, dicyclopentadiene, cyclohexadiene, and 5-butylidene-2-norbornene.

In some embodiments, the ethylene / α-olefin-diene interpolymer is 2
Has a molecular weight distribution (MWD) of ~ 4. All values and subranges from 2 to 4 are included and disclosed herein, for example, an ethylene / α-olefin / diene interpolymer is 2
. 2, 2.4, 2.6, 2.8, 3, 3.2, 3.4, 3.6, 3.8 or 4 MWD
And an upper limit of 2, 2.2, 2.4, 2.6, 2.8, 3, 3.2, 3.4, 3.6,
It can have a lower limit of 3.8 MWD. The MWD of the ethylene / α-olefin / diene interpolymer is 2-4, in the alternative 2.5-3.5, in the alternative 2.8
~ 3.8, or in the alternative, 2.1-3.9.

In some embodiments, the ethylene / α-olefin-diene interpolymer is 1
It has a crystallinity% (% Cry) of 3 to 20% by weight. All values and subranges from 13% Cry to 20% Cry are included and disclosed herein, for example,% Cry for ethylene / α-olefin / diene interpolymers is 14%, 15%, 16%, 17 %, 18%,
An upper limit of 19% or 20% by weight, and 13%, 14%, 15%, 16%, 17%,
18% or 19% by weight ethylene / α-olefin-diene interpolymer%
Can have a Cry lower limit. The% Cry of the ethylene / α-olefin / diene interpolymer useful in the present invention is 13% to 20% by weight, in an alternative, 14% by weight.
-19% by weight, in alternatives 15% to 18% by weight, or in alternatives 16% to
It can be 20% by weight.

In other embodiments, the ethylene / α-olefin-diene polymer is from 50 wt% to
70 wt% ethylene content, 20 wt% to 49 wt% propylene content, and 1 wt%
It has a non-conjugated diene content of -10% by weight and all weight percentages are relative to the total weight of the polymer. 50-7 in ethylene / α-olefin / diene interpolymer
All values and subranges of 0 wt% ethylene content are included and disclosed herein.
For example, an ethylene / α-olefin / diene interpolymer can have a lower limit of 50, 55, 60, or 65 wt% ethylene and an upper limit of 55, 60, 65, or 70 wt% ethylene. All values and subranges of the propylene content of 20-49 wt% in the ethylene / α-olefin / diene interpolymer are included and disclosed herein. For example, ethylene / α-olefin / diene polymer is 20, 25
, 30, 35, 40 or 45 wt% lower limit of propylene and 25, 30, 35,
It can have an upper limit of 40 or 49 wt% propylene. All values and subranges of the diene content of 1-10 wt% in the ethylene / α-olefin / diene interpolymer are included and disclosed herein. For example, an ethylene / α-olefin / diene interpolymer has a lower limit of 1, 3, 5, 7 or 9 wt% diene and 2, 4,
It can have an upper limit of 6, 8 or 10 wt% diene.

In some embodiments of the invention, the ethylene / α-olefin / diene interpolymer has a rheological ratio (V0.1 / V100) at 190 ° C. of 25 or greater. Ethylene / α
-All values of rheology ratios of 25 or more of olefin / diene interpolymers are included and disclosed herein, eg ethylene / α-olefin / diene interpolymer rheology ratio at 190 ° C, alternatively 30 or more, alternatives Then, over 35, and in the alternative, 39
As described above, in the alternative example, it can be 41 or more, in the alternative example, 45 or more, or in the alternative example, 50 or more.

  In one embodiment, the ethylene / α-olefin interpolymer is EPDM.

In one embodiment of the composition of the present invention, components A and C comprise an ethylene / propylene / diene (EPDM) interpolymer, or blends thereof.

In some embodiments, the EPDM interpolymer contains 20 wt% to 80 wt% ethylene, 19 wt% to 70 wt% higher alpha-olefin, and 1 wt% to 10 wt% non-conjugated diene. . More preferred higher α-olefins are propylene and 1-butene. More preferred polyenes are ethylidene norbornene, 1,4-hexadiene, and dicyclopentadiene.

Examples of typical EPDM interpolymers for use include Dow Chemical
Nordel IP 4770R / P, Nordel IP 476 available from al
0, Nordel IP 4785 and Nordel IP 3760P hydrocarbon rubber. DSM Elastomers Americas, Baton Rou
ge, La. Keltan polymer available from ExxonMobil Chemi
EPDM interpolymer VISTALON EP (D) M ethylene / propylene rubber available from cal or R available from Lion Copolymers, LLC
OYALENE EPDM. Particularly useful is EPDM having a Mooney viscosity of 50 or greater
It is.

In a preferred embodiment, the ethylene / α-olefin / diene interpolymer is not oil extended.

In a preferred embodiment, the ethylene / α-olefin / diene interpolymer is
It is in the form of free-flowing pellets. As used herein, free-flowing refers to the ability of pellets (of general polymer pellet size) to move or flow without adhering to each other at ambient conditions to form a larger mass.

In one embodiment, the ethylene / α-olefin / diene interpolymer is formed using a single site catalyst. In a further embodiment, the single site catalyst is
It is selected from metallocene catalysts, constrained geometry catalysts, or post metallocene catalysts. In a further embodiment, the single site catalyst is selected from a constrained geometry catalyst, or a post metallocene catalyst.

In one embodiment, the ethylene / α-olefin / diene interpolymer is formed using a constrained geometry catalyst.

In one embodiment, the ethylene / α-olefin / diene interpolymer is formed using a post metallocene catalyst.

In one embodiment, the ethylene / α-olefin / diene interpolymer is 3.5.
Having a molecular weight distribution (MWD) of less than, preferably less than 3.2, more preferably less than 3.1.

In one embodiment, the pre-compounded ethylene / α-olefin / diene interpolymer has a small amount of oil and / or processing additive and the amount of oil and / or additive is less than 33% of the weight of the polymer. To be diluted.

In a preferred embodiment, the pre-compounded ethylene / α-olefin /
The diene interpolymer is not diluted with oil or processing additives.

In one embodiment, the ethylene / α-olefin / diene interpolymer comprises at least two ethylene / α-olefin / diene interpolymers, preferably two interpolymers. In one embodiment, the at least one interpolymer is 35
With a crystallization temperature (Tc) of less than 30 ° C., preferably less than 30 ° C., more preferably less than 25 ° C.
It has a crystallization temperature (Tc) above 5 ° C, more preferably above 28 ° C. In one embodiment,
The at least one interpolymer has a Mooney viscosity (ML 1 + 4, 125 ° C.) of 30-100, preferably 40-90, and the total ethylene / α-olefin / diene interpolymer is 50-100, preferably 50 ~ 90 Mooney viscosity (ML 1 + 4, 1
25 ° C). In one embodiment, the at least one interpolymer is 1.5
Having an MWD of ˜3, the total ethylene / α-olefin / diene interpolymer is 2˜2
It has an MWD of 3.5. In one embodiment, each interpolymer is EPDM;
The diene is preferably 5-ethylidene-2-norbornene (ENB). As discussed herein, the ethylene / α-olefin / diene interpolymer may comprise a combination of these embodiments.

In one embodiment, the ethylene / α-olefin / diene interpolymer is an in-reactor blend of at least two polymers, preferably two polymers.

In one embodiment, the ethylene / α-olefin / diene interpolymer is a post-reactor blend of at least two polymers, preferably two polymers.

In a preferred embodiment, the ethylene / α-olefin / diene interpolymer is E
PDM.

  In a further embodiment, the diene is ENB.

The ethylene / α-olefin / diene interpolymer may comprise a combination of two or more embodiments as described herein.

The ethylene / α-olefin interpolymer may comprise a combination of two or more embodiments as described herein.

The ethylene / α-olefin copolymer may comprise a combination of two or more embodiments as described herein.

The ethylene / α-olefin-diene interpolymer may comprise a combination of two or more embodiments as described herein.

Ethylene / α-olefin multiblock copolymers useful in component A As used herein, “olefin block copolymer” and “OBC”
The term means olefin multiblock excluding olefin diblock copolymers.

In some embodiments, component A is an olefin block copolymer, such as those described in International Publication No. WO 2005/090427 and US Patent Application Publication No. 2006-199930A1, the disclosures of which are incorporated herein by reference. Of ethylene multiblock copolymers. Such olefin block copolymers are (a
) About 1.7 to about 3.5 _M w / _{M n,} of at least one degree Celsius melting point, _{T m,} and grams / density of cubic centimeter (g / cc), having a d _{(T m} and d figures Correspond to: T _m > −2002.9 + 4538.5 (d) −2422.2 (d) ² ), or (b) M _w / M _n of about 1.7 to about 3.5. Characterized by the heat of fusion in joules per gram (J / g), ΔHf, and the amount of Celsius delta, ΔT, defined as the temperature difference between the highest DSC peak and the highest CRYSTAF peak ( ΔT and ΔH
The numerical value of f has the following relationship: ΔT> −0 for ΔHf greater than zero and at most 130 J / g
. 1299 (ΔHf) +62.81, and ΔT ≧ 4 for ΔHf greater than 130 J / g
CRYSTAF peak is determined using at least 5 percent of the cumulative polymer, and if less than 5 percent of the polymer has a distinguishable CRYSTAF peak, the CRYSTAF temperature is 30 ° C), or (c ) Characterized by 300 percent strain and percent elastic recovery in one cycle, Re, measured for compression molded films of ethylene / α-olefin interpolymer, having density, d (g / cc) (ethylene / α-olefin) If the interpolymer is substantially free of cross-linked phases, the values of Re and d satisfy the following relationship: Re> 1481-1629 (d)) or (d) TRE
Molcomonomer having a molecular fraction that elutes between 40 ° C. and 130 ° C. when fractionated using F, which fraction is at least 5 percent higher than a comparable random ethylene interpolymer fraction eluting between the same temperatures (The comparable random ethylene interpolymer has the same comonomer (s) as the ethylene / α-olefin interpolymer and has a melt index within 10 percent of the ethylene / α-olefin interpolymer). (E) storage modulus at 25 ° C., G ′ (25 ° C.), and storage modulus at 100 ° C., G ′ (100 ° C. ) (G ′ (25 ° C.) to G ′ (100 ° C.) ratio of about 1: 1
Ethylene / α-olefin interpolymers (ranging from about 9: 1).

The ethylene / α-olefin interpolymer has (a) a molecular fraction that elutes between 40 ° C. and 130 ° C. when fractionated using TREF, wherein the fraction is at least 0.5 and at most about 1 Characterized by having a block index and a molecular weight distribution greater than about 1.3, M _w / M _n , or (b) an average block index greater than zero and at most about 1.0 and greater than about 1.3 It can also have a molecular weight distribution, _Mw / _Mn . Such olefin block copolymers are commercially available from The Dow Chemical Company under the trade name INFUSE olefin block copolymers.

The ethylene / α-olefin multi-block copolymer can comprise a combination of two or more embodiments described herein.

Propylene / α-olefin interpolymer useful in component A In some embodiments of the first thermoplastic elastomer composition, component A comprises one or more propylene / α-olefin interpolymers.

Although ethylene is not generally characterized as an α-olefin, as used herein, the term propylene / α-olefin interpolymer in relation to component A includes the propylene-ethylene interpolymer further characterized below. .

Such propylene / α-olefin copolymers are described in further detail in US Pat. Nos. 6,960,635 and 6,525,157, which are incorporated herein by reference. Such propylene / α-olefin copolymers are known as The Dow Ch.
from the electronic company, under the trade name VERSIFY elastomers and plastomers, or from the ExxonMobil Chemical Company,
It is marketed under the trade name VISTAMAXX.

In one embodiment, the propylene / α-olefin copolymer is characterized as having a substantially isotactic propylene sequence. “Substantially isotactic propylene sequence” means that the sequence is greater than about 0.85, in an alternative, greater than about 0.90, in another alternative, greater than about 0.92, and another alternative In the examples, it is meant to have an isotactic triad (mm) measured by ¹³ C NMR greater than about 0.93. Isotactic triads are well known in the art and are described, for example, in US Pat.
504,172 and WO 00/01745, and refers to an isotactic sequence of triad units in a copolymer molecular chain determined by ¹³ C NMR spectrum.

Propylene / α-olefin copolymer is ASTM (at 230 ° C./2.16 Kg)
It can have a melt flow rate in the range of 0.1-25 g / 10 min as measured according to D-1238. All individual values and subranges from 0.1 to 25 g / 10 min are included and disclosed herein, for example, melt flow rate is 0.1 g / 10 min, 0.2 g
/ 10 minutes, or 25 g / 10 minutes from the lower limit of 0.5 g / 10 minutes, 15 g / 10 minutes, 1
The upper limit can be 0 g / 10 min, 8 g / 10 min, or 5 g / 10 min. For example, the propylene / α-olefin copolymer can have a melt flow rate in the range of 0.1-10 g / 10 min, or in the alternative, the propylene / α-olefin copolymer is 0.2-10 g / It can have a melt flow rate in the range of 10 minutes.

The propylene / α-olefin copolymer is 1 weight percent (2 joules / gram (
J / g) having a crystallinity in the range of from 30 to 30 weight percent (50 Joules / gram of heat of fusion). All individual values and subranges from 1 weight percent (2 Joule / gram heat of fusion) to 30 weight percent (50 Joule / gram heat of fusion) are included and disclosed herein, for example, crystallinity is From a lower limit of 1 weight percent (2 Joules / gram heat of fusion), 2.5 percent (4 Joules / gram heat of fusion), or 3 percent (5 Joules / gram heat of fusion) to 30 weight percent (50 Joules / gram) Heat of fusion of grams), 24 weight percent (heat of fusion of 40 joules / gram), 15 weight percent (2
4.8 joules / gram heat of fusion) or 7 weight percent (11 joules / gram heat of fusion). For example, the propylene / α-olefin copolymer can have a crystallinity ranging from 1 weight percent (2 Joules / gram heat of fusion) to 24 weight percent (40 Joules / gram heat of fusion), or alternatively In the example
The propylene / α-olefin copolymer can have a crystallinity ranging from 1 weight percent (2 Joules / gram heat of fusion) to 15 weight percent (24.8 Joules / gram heat of fusion), or alternatively In the example, the propylene / α-olefin copolymer is
1 weight percent (2 joule / gram heat of fusion) to 7 weight percent (11 joule / gram)
Crystallinity in the range of (grams of heat of fusion), or in the alternative, the propylene-α-olefin copolymer is 1 weight percent (2 joules / gram of heat of fusion)
It can have a crystallinity in the range of ˜5 weight percent (8.3 Joules / gram heat of fusion). Crystallinity is measured via the DSC method described herein. Propylene / α-
The olefin copolymer comprises units derived from propylene and units derived from one or more α-olefin comonomers. Typical comonomers utilized in propylene / α-olefin copolymers are C _{4 to} C ₁₀ α-olefins such as C ₄ , C ₆ and C ₈ α-olefins. A particularly preferred polyethylene / α-olefin of component A is a propylene-ethylene copolymer.

Propylene / alpha-olefin copolymers are 1-4 containing ethylene as discussed above.
Contains 0 weight percent of one or more α-olefin comonomers. All individual values and subranges from 1 to 40 weight percent are included and disclosed herein, for example, the comonomer content is 1 weight percent, 3 weight percent, 4 weight percent, 5 weight percent, 7 weight percent, Alternatively, the lower limit of 9 weight percent can be an upper limit of 40 weight percent, 35 weight percent, 30 weight percent, 27 weight percent, 20 weight percent, 15 weight percent, 12 weight percent, or 9 weight percent. For example, the propylene / α-olefin copolymer comprises 1 to 35 weight percent of one or more α-olefin comonomers, or alternatively, the propylene / α-olefin copolymer is 1 to 30 weight percent of one species. Or multiple α
The olefin comonomer or alternatively the propylene / α-olefin copolymer comprises 3 to 27 weight percent of one or more α-olefin comonomers, or alternatively the propylene / α-olefin copolymer. Contains 3 to 20 weight percent of one or more α-olefin comonomers, or in the alternative, the propylene / α-olefin copolymer comprises 3 to 15 weight percent of one or more α-olefin comonomers. Including.

In some embodiments of the invention, the propylene / α-olefin copolymer is propylene / ethylene, and ethylene is 9-15 w of the total weight of the propylene / ethylene copolymer.
present in an amount of t%. All individual values and subranges from 9 to 16 weight percent are included and disclosed herein, for example, the comonomer content ranges from a lower limit of 9, 10, 11, 12, 13 or 14 weight percent to 10, 11 , 12, 13, 14, or 15 weight percent. For example, the propylene / ethylene copolymer is 9-15 wt%, or alternatively 10-14 wt%, or alternatively 11-11
It may contain 3 wt% ethylene.

A propylene / α-olefin copolymer is defined as a weight average molecular weight divided by the number average molecular weight of 3.5 or less, alternatively 3.0 or less, or another alternative 1.8-3.0 ( M _w / M _n ) molecular weight distribution (MWD).

Such propylene / α-olefin copolymers are described in further detail in US Pat. Nos. 6,960,635 and 6,525,157, which are incorporated herein by reference. Such propylene / α-olefin copolymers are known as The Dow Ch.
from the electronic company, under the trade name VERSIFY elastomers and plastomers, or from the ExxonMobil Chemical Company,
It is marketed under the trade name VISTAMAXX.

In one embodiment, the propylene-α-olefin copolymer comprises (A) 60 and 100
Less than, preferably between 80 and 99, more preferably between 85 and 99 weight percent units of propylene, and (B) between greater than zero and 40, preferably between 1 and 20, more Preferably comprising between 4 and 16, even more preferably between 4 and 15 weight percent units derived from ethylene and / or at least one of C _{4 to} C ₁₀ α-olefins, on average at least 0.001 Further characterized as containing a long chain branch / total carbon of preferably at least 0.005 on average, more preferably at least 0.01 on average, the term long chain branch being short chain branch More than at least one (1) carbon long chain length and short chain branching refers to a chain length two (2) carbons shorter than the number of carbons in the comonomer. For example, propylene / 1-octene interpolymers have a main chain with long chain branches that are at least seven (7) carbons long, but these main chains are short chains that are only six (6) carbons long. It also has branches. The maximum number of long chain branches in the propylene interpolymer is not critical to the definition of this embodiment of the invention, but generally does not exceed 3 long chain branches / 1000 total carbons. Such propylene-α-olefin copolymers are described in US Provisional Patent Application No. 60 / 988,999, International Publication No. WO2009 / 067337A1, each of which is incorporated herein by reference.
No. pamphlet and EP 0964890B1.

The propylene / α-olefin interpolymer may comprise a combination of two or more embodiments as described herein.

Polypropylene homopolymers and propylene / ethylene copolymers useful in Component B Embodiments of the first thermoplastic elastomer composition of the present invention are at least one selected from the group consisting of polypropylene homopolymers, propylene / ethylene copolymers and high density polyethylene. Also included is a semi-crystalline polymer, component B. As described in further detail below, the propylene / ethylene copolymers useful in Component B have structures and properties that are different from those of the propylene / α-olefin interpolymers useful in Components A and C.

  In one embodiment, Component B is a polypropylene homopolymer.

In one embodiment, the polypropylene homopolymer is 125 as determined by DSC.
Or a melting point (Tm) of 130 ° C. or higher, 135 ° C. or higher, or 140 ° C. or higher.

In one embodiment, the polypropylene homopolymer is 75 J as determined by DSC.
/ G or more, or 80 J / g or more, 85 J / g or more heat of fusion (ΔHf).

In one embodiment, the polypropylene homopolymer is 5,000,000 g / mol.
Or a weight average molecular weight (M _w ) within a range having an upper limit of 500,000 g / mol and a lower limit of 10,000 g / mol, or 50,000 g / mol.

In one embodiment, the polypropylene homopolymer is 40, 30, or 20,
Or a molecular weight distribution M _w / M, sometimes referred to as a “polydispersity index” (PDI) within a range having an upper limit of 10, and a lower limit of 2, or 3, or 4, or 5.
_n (MWD).

  In one embodiment, component B is a propylene / ethylene copolymer.

In one embodiment, the propylene / ethylene copolymer comprises 90 wt% or more, or 92 wt% or more, or 94 wt% or more, or 96 wt% or more, or 98 wt% or more of polymerized propylene based on the weight of the copolymer.

In one embodiment, the propylene / ethylene copolymer comprises 10 wt% or less, or 8 wt% or less, or 6 wt% or less, or 4 wt% or less, or 2 wt% or less of polymerized ethylene based on the weight of the copolymer.

In one embodiment, the propylene / ethylene copolymer is 1 as determined by DSC.
It has a melting point (Tm) of 25 ° C or higher, or 130 ° C or higher, 135 ° C or higher, and 140 ° C or higher.

In one embodiment, the propylene / ethylene copolymer is 7 as determined by DSC.
It has a heat of fusion (ΔHf) of 5 J / g or more, or 80 J / g or more, or 85 J / g or more.

In one embodiment, the propylene / ethylene copolymer is 5,000,000 g / m.
ol, or having a weight average molecular weight (M _w ) within a range having an upper limit of 500,000 g / mol and a lower limit of 10,000 g / mol, or 50,000 g / mol.

In one embodiment, the propylene / ethylene copolymer has a “polydispersity index” (PDI) within a range having an upper limit of 40, or 30, or 20, or 10, and a lower limit of 2, or 3, or 4, or 5. ) Molecular weight distribution M _w, sometimes called
/ M _n (MWD).

Propylene homopolymers can be formed by homopolymerization of propylene in a single stage or multistage reactor.

Propylene / ethylene copolymers can be formed by copolymerizing propylene and ethylene in a single or multi-stage reactor.

Polymerization methods for preparing polypropylene homopolymers or propylene / ethylene copolymers include high pressure, slurry phase, gas phase, bulk phase, liquid phase, and combinations thereof. Catalyst systems include traditional Ziegler-Natta catalysts and single site metallocene catalyst systems. In one embodiment, the catalyst used has a high isospecificity. Each polymerization can be carried out by a continuous or batch process and can involve the use of chain transfer agents, scavengers, or other such additives well known to those skilled in the art. The polypropylene homopolymer or propylene / ethylene copolymer may also contain one or more additives such as flow improvers, nucleating agents, and antioxidants.

A polypropylene homopolymer can comprise a combination of two or more embodiments as described herein.

A propylene / ethylene copolymer may comprise a combination of two or more embodiments as described herein.

HDPE useful in components B and D
Some embodiments of the first thermoplastic elastomer composition of the present invention also include at least one high density polyethylene.

  Embodiments of the second composition of the present invention include at least one HDPE.

The properties of high density polyethylene (HDPE) useful in certain embodiments of the invention will vary depending on the desired application. The molecular weight of HDPE for use in certain embodiments of the present invention varies depending on the application, but can be indicated using a melt flow measurement I ₂ that is inversely proportional to the molecular weight of the polymer. The relationship is not linear, but the higher the molecular weight, the more I
₂ is low.

High density polyethylene useful in components B and D of certain embodiments of the present invention is 0.
It can have a density in the range of 94 to 0.96 g / cc. 0.94 to 0.96 g / c
All individual values and subranges of c are included and disclosed herein, for example, high density polyethylene compositions are 0.94 g / cc, 0.945 g / cc, 0.95 or 0.955.
The lower limit density of g / cc and 0.945 g / cc, 0.949 g / cc, 0.955 g
/ Cc or 0.96 g / cc upper density limit. For example, high density polyethylene is 0.940-0.950 g / cc, or in the alternative 0.95-0.9.
It can have a density in the range of 6 g / cc, or in the alternative, 0.945 to 0.960 g / cc.

In one embodiment, the high density polyethylene can have an I _{2 of} 1-50 g / 10 min. All values and subranges from 1 to 50 g / 10 min are disclosed and included herein, for example, high density polyethylene compositions have an I ₂ lower limit of 1, 10, 20, 30, 40 or 45 g / 10 min and 5 , 15, 25, 35, 45, or 50 g /
It can have an upper limit of 10 min. High density polyethylene is 1-50g / 10
min, or in alternatives 20-40 g / 10 min, or in alternatives 30-43
It can have an I ₂ of g / 10 min, in alternatives 5 g / 10 min to 30 g / 10 min, or in alternatives 5 to 46 g / 10 min.

The molecular weight distribution (Mw / Mn) of HDPE may be narrow or broad, for example 2 to 40
Mw / Mn of the height. All individual ranges from 2 to 40 are included and disclosed herein, eg, HDPE is 2, 5, 10, 13, 23 or 36 Mw
Can have a lower limit of / Mn and an upper limit of 5, 12, 20, 27, 33, 39, or 40 Mw / Mn.

In those embodiments of the invention comprising HDPE in component B or D, the HDPE is
It can be present in an amount of 30 to 100 PHR based on the weight of the ethylene / α-olefin interpolymer. All values and subranges from 30 to 100 PHR are encompassed and disclosed herein, for example, HDPE is an upper limit of 40, 50, 60, 70, 80, 90 or 100 PHR and 30, 40, 50, 60, 70 , 80, or 90 PHR. The amount of HDPE is, for example, 30-70 PHR, in an alternative example 30-60 PHR,
30-40 PHR in alternative, 40-80 PHR in alternative, 60-90 in alternative
PHR, or alternatives can range from 60 to 85 PHR.

HDPE can be made by any process including metallocene, Cr and Ziegler-Natta catalyst processes. Any conventional ethylene homopolymerization or copolymerization reaction can be employed to produce high density polyethylene useful in each embodiment of the present invention. Such conventional ethylene homopolymerization or copolymerization reactions include gas phase polymerization, slurry phase polymerization using conventional reactors such as gas phase reactors, loop reactors, stirred tank reactors, and batch reactors, Examples include, but are not limited to, liquid phase polymerization and combinations thereof.

  An HDPE may comprise a combination of two or more embodiments described herein.

Alternative Embodiment of Thermoplastic Elastomer Composition One embodiment of the first thermoplastic elastomer composition is at least one elastomeric polymer selected from the group of ethylene / α-olefin interpolymers and propylene / α-olefin interpolymers. At least one semicrystalline polymer selected from the group of component A, polypropylene homopolymer, propylene / ethylene copolymer and high density polyethylene, component B, at least one oil, and at least one filler, For compositions having TMA above 85 ° C., 1.5 Pa or less at 10000 Pa-s, 100
Features an SRI of less than 4.5 at 0 Pa-s.

In an alternative embodiment, the first thermoplastic elastomer composition has a hardness in the range of 40-85 Shore A, a tensile strength between 2 and 8 MPa, an elongation> 400%, and measured by ISO 815, Type B method A composition according to any of the above embodiments is provided except that it is further characterized by 30-75% compression set at 40 ° C.

In an alternative embodiment, the first thermoplastic elastomer composition provides a composition according to any of the above embodiments, except that component A is one or more EPDMs.

In an alternative embodiment, the first thermoplastic elastomer composition is one or more olefin block copolymers in which component A is combined in an amount of 20 wt% to 50 wt% relative to the total weight of the thermoplastic elastomer composition. Otherwise, a composition according to any of the above embodiments is provided.

In an alternative embodiment, the first thermoplastic elastomer composition is such that component A is ethylene / α
A composition according to any of the above embodiments is provided except that it is an olefin copolymer.

In an alternative embodiment, the first thermoplastic elastomer composition is such that component A is ethylene / α
A composition according to any of the above embodiments, except that it is an olefin interpolymer, a semicrystalline polymer, component B is high density polyethylene.

In some preferred embodiments of the first thermoplastic elastomer composition, the elastomeric polymer, component A is an ethylene / α-olefin interpolymer, and the semicrystalline polymer, component B is high density polyethylene.

In an alternative embodiment, the first thermoplastic elastomer composition is 1 at 10,000 Pas.
. Has an SRI of 5 or less.

In an alternative embodiment of the first thermoplastic elastomer composition, an elastomeric polymer,
Component A is an ethylene / α-olefin interpolymer, semi-crystalline polymer, Component B
Is a polypropylene homopolymer.

In an alternative embodiment of the first thermoplastic elastomer composition, an elastomeric polymer,
Component A is an ethylene / α-olefin interpolymer, semi-crystalline polymer, Component B
Are one or more semi-crystalline propylene / ethylene copolymers.

In an alternative embodiment of the first thermoplastic elastomer composition, the addition of oil and / or filler is optional.

In an alternative embodiment of the first thermoplastic elastomer composition, an elastomeric polymer,
Component A is a propylene / α-olefin interpolymer, semi-crystalline polymer, Component B is high density polyethylene.

In an alternative embodiment of the first thermoplastic elastomer composition, an elastomeric polymer,
Component A is a propylene / α-olefin interpolymer, a semicrystalline polymer, and Component B is a polypropylene homopolymer.

In an alternative embodiment of the first thermoplastic elastomer composition, an elastomeric polymer,
Component A is a propylene / α-olefin interpolymer, a semicrystalline polymer, Component B is one or more propylene / ethylene copolymers.

In some embodiments of the invention, the first thermoplastic elastomer composition has a rheological ratio (viscosity at 0.1 rad / s vs. viscosity at 100 rad / s (V0.
1 / V100)) is an inventive composition comprising an elastomer comprising an ethylene / α-olefin interpolymer (optionally further containing a diene) or a propylene / α-olefin interpolymer. In certain embodiments, the compositions of the present invention provided herein are specific compositions, propylene-based polymers (such as homopropylene (hPP) or random copolymers of propylene (RCP)), or low density polyethylene (LDPE). Or at least one thermoplastic vulcanizate (TPV) and / or hydrogenated styrene block copolymer (“HSBC such as SEBS, SEPS or SEEPS) to improve compression set at high temperatures in high density polyethylene (HDPE) ")
including.

One embodiment of the first and second compositions of the present invention comprises a hardness in the range of 40-85 Shore A,
It is further characterized by a tensile strength of 2-8 MPa, an elongation> 400% and a compression set of 30-75% at 40 ° C. In some embodiments of the first thermoplastic elastomer composition of the present invention, component A is combined at 20 wt% to 5 wt% relative to the total weight of the thermoplastic elastomer composition.
One or more EPDMs in an amount of 0 wt%.

In some embodiments of the first and second compositions of the present invention, the ethylene / α-olefin / diene interpolymer has a rheological ratio (V0.1 / V100 at 190 ° C. of 25 or greater).
).

In some embodiments of the first and second compositions of the present invention, the ethylene / α-olefin interpolymer is an ethylene / propylene interpolymer.

In some embodiments of the first and second compositions of the present invention, the ethylene / propylene interpolymer has a rheological ratio (V0.1 / V100) of greater than or equal to 22 at 190 ° C.

In some embodiments of the first and second compositions of the invention, the HDPE is 1-50 g /
It has an I ₂ of 10 min, preferably 5 g / 10 min to 30 g / 10 min.

In a preferred embodiment, the first and second compositions of the present invention do not contain a vulcanizing agent. Examples of the vulcanizing agent include peroxides, azo compounds, phenols, azides, aldehyde-amine reaction products, substituted ureas, substituted guanidines; substituted xanthates; substituted dithiocarbamates;
Sulfur-containing compounds such as thiazole, imidazole, sulfonamide, thiurami disulfide, paraquinone dioxime, dibenzoparaquinone dioxime, sulfur; silane. Encyclopedia of Chemical Technology, Volume 17, 2nd edition, Interscience Publishers, 1
968; see also Organic Peroxides, Daniel Seem, Volume 1, Wiley-Interscience, 1970)
And CP Park, “Polyolefin Foam”, Chapter 9, Handbook of Polymer Foams and Techn
ology, D. Klempner and KC Frisch, Hanser Publishers, New York (1991), 198
See page 204. See also U.S. Pat. Nos. 7,741,408, 6,506,842, 5,869,591, and 5,977,271. Each reference is incorporated herein by reference.

In preferred embodiments, the first or second composition of the present invention does not include a free radical adjuvant. Free radical adjuvants are monomers or low molecular weight polymers having two or more functional groups that react well with free radicals. In general, these functional groups are methacrylic acid, allyl or vinyl. Free radical adjuvants include diallyl terephthalate, triallylcyanurate, triallylisocyanurate, 1,2 polybutadiene, divinylbenzene, trimethylolpropane trimethacrylate, polyethylene glycol dimethacrylate, dimethacrylate Ethylene glycol, pentaerythritol triacrylate, allyl methacrylate, N N
'-M-phenylene bismaleimide, toluene bismaleimide-p-quinone dioxime,
Examples thereof include nitrobenzene and diphenylguanidine.

In one embodiment of the first or second composition of the present invention, each comprises an ethylene / α-olefin interpolymer and HDPE. In one embodiment, ethylene / α-
Olefin interpolymers are present in higher amounts than HDPE.

In one embodiment of the first or second composition of the present invention, the weight ratio of ethylene / α-olefin interpolymer to HDPE is 2-5, preferably 2.2-4, more preferably 2.5-3. .5.

In one embodiment, the first or second composition of the present invention comprises an ethylene / α-olefin / diene interpolymer and HDPE. In one embodiment of the first or second composition, the ethylene / α-olefin / diene interpolymer is EPDM. In a further embodiment, the diene is ENB.

In one embodiment of the first or second composition of the present invention, ethylene / α-olefin /
Diene interpolymers are present in higher amounts than HDPE. In one embodiment, the ethylene / α-olefin / diene interpolymer is EPDM. In a further embodiment, the diene is ENB.

In one embodiment of the first or second composition of the present invention, ethylene / α-olefin /
The weight ratio of diene interpolymer to HDPE is 2-5, preferably 2.2-4, more preferably 2.5-3.5. In a further embodiment, the ethylene / α-olefin / diene interpolymer is EPDM. In a further embodiment, the diene is ENB.

In one embodiment, the first or second composition of the present invention comprises an ethylene / α-olefin copolymer and HDPE. In a further embodiment, the α-olefin is C3-
C10α-olefin, preferably selected from 1-octene, 1-hexene, 1-butene or propylene.

In one embodiment, the ethylene / α-olefin copolymer is present in greater amounts than HDPE. In a further embodiment, the α-olefin is a C3-C10 α-olefin and is preferably selected from 1-octene, 1-hexene, 1-butene or propylene.

In one embodiment, the weight ratio of ethylene / α-olefin copolymer to HDPE is 2-5, preferably 2.2-4, more preferably 2.5-3.5. In a further embodiment, the α-olefin is a C 3 -C 10 α-olefin and is 1-octene, 1
-Preferably selected from hexene, 1-butene or propylene.

In some embodiments of the first thermoplastic elastomer composition of the present invention, component A is 1 in an amount of 20 wt% to 50 wt% combined with respect to the total weight of the thermoplastic elastomer composition.
One or more olefin block copolymers.

In some embodiments of the second composition of the present invention, component C is one or more olefin block copolymers in an amount of 20 wt% to 50 wt% combined with the total weight of the thermoplastic elastomer composition. It is.

In some embodiments of the first thermoplastic elastomer composition of the present invention, the elastomeric polymer, component A comprises a diene.

In some embodiments of the second composition of the present invention, the elastomeric polymer, component C comprises a diene.

In some embodiments of the first thermoplastic elastomer composition of the present invention, the elastomeric polymer, component A is an ethylene / α-olefin interpolymer, and the semicrystalline polymer, component B is high density polyethylene (HDPE). is there.

In some embodiments of the first or second composition of the present invention, the ethylene / α-olefin interpolymer has a ΔHf of 36 J / g or more, preferably 38 J / g or more.

In some embodiments of the first or second inventive composition, the ethylene / α-olefin interpolymer is an ethylene / α-olefin / diene interpolymer.

In some embodiments of the first thermoplastic elastomer composition of the present invention, component A is 1 in an amount of 20 wt% to 50 wt% combined with respect to the total weight of the thermoplastic elastomer composition.
Species or multiple EPDM.

In some embodiments of the first and second compositions of the present invention, the HDPE is ethylene / α
-Present in an amount of 30 to 100 PHR relative to the weight of the olefin interpolymer.

The present invention relates to i) Component C, Mooney viscosity of 55 or higher (ML 1 + 4, 125 ° C.) and 3
There is further provided a second composition comprising an ethylene / α-olefin interpolymer having a ΔHf of 6 J / g or more and optionally comprising a third comonomer; and ii) component D, high density polyethylene (HDPE).

In an alternative embodiment, the second composition is further characterized by an SRI of less than 1.5 at 10,000 Pa-s and less than 4.5 at 1000 Pa-s for compositions having a TMA greater than 85 ° C. Compositions according to any of the above embodiments are provided.

In an alternative embodiment, the second composition provides a composition according to any of the above embodiments, except that component C has an MWD of less than 4.

In an alternative embodiment, the second composition provides a composition according to any of the above embodiments, except that the ethylene / α-olefin interpolymer is an ethylene / α-olefin / diene interpolymer.

In an alternative embodiment, the second composition is a composition according to any of the above embodiments, except that the ethylene / α-olefin / diene interpolymer has a rheological ratio (V0.1 / V100) of greater than or equal to 25 at 190 ° C. Offer things.

In an alternative embodiment, the second composition provides a composition according to any of the above embodiments, except that the ethylene / α-olefin interpolymer is an ethylene / propylene interpolymer.

In an alternative embodiment, the second composition comprises 1 ethylene / propylene interpolymer.
A composition according to any of the above embodiments is provided except that it has a rheological ratio (V0.1 / V100) of 22 or greater at 90 ° C.

In an alternative embodiment, the second composition is a composition according to any of the above embodiments, except that the HDPE has an I _{2 of} 1-50 g / 10 min, or 5-40 g / 10 min, or 10-20 g / 10 min. I will provide a.

In an alternative embodiment, the second composition provides a composition according to any of the above embodiments, except that HDPE is present in an amount of 30-100 PHR relative to the weight of the ethylene / α-olefin interpolymer.

In an alternative embodiment, the second composition provides a composition according to any of the above embodiments except that it further comprises an oil.

In an alternative embodiment, the second composition provides a composition according to any of the above embodiments except that it further comprises a filler.

The present invention further provides a commercial product comprising at least one component formed from the composition of any one of the above embodiments.

  In one embodiment, the product of the present invention has an adhesive strength of 0.012 N or less.

In an alternative embodiment, the product of the present invention is 70 as measured by ASTM D-395.
Except for having a compression set of less than 70 percent at 0 ° C., according to any of the above embodiments.

  Some embodiments of the second composition of the present invention further comprise an oil.

  Some embodiments of the second composition of the present invention further comprise a filler.

  Some embodiments of the product of the present invention have an adhesive strength of 0.012 N or less.

  Some embodiments of the products of the present invention have a compression set of less than 70 percent at 70 ° C.

Embodiments of the present invention further include additives and fillers for producing rheological behavior to replace polyolefin-based profiles that meet the performance characteristics required by the intended end use. A composition of the invention is provided.

One embodiment of the second composition of the present invention has a hardness in the range of 40-85 Shore A, 2-8 MP
It is further characterized by a tensile strength of a, elongation> 400% and a compression set of 30-75% at 40 ° C.

One embodiment of the second composition has a Mooney viscosity of 55 or greater and a ΔHf of 36 J / g or greater.
At least one ethylene / α-olefin interpolymer having the following: Component C; and Component D, at least one high density polyethylene (HDPE).

One embodiment of the second composition is characterized by an SRI of less than 1.6 at 10000 Pa-s and less than 4.5 at 1000 Pa-s for a composition having a TMA greater than 85 ° C. at 1000 μm.

  One embodiment of the second composition includes component c having an MWD of less than 3.

  One embodiment of the second composition includes component c having a MWD of less than 2.5.

  One embodiment of the second composition includes component c having an MWD of less than 2.

  One embodiment of the second composition comprises component c having a MWD in the range of 1-3.

  One embodiment of the second composition comprises component c having a MWD in the range of 1.5-3.

Additives In some embodiments, inventive compositions of the present invention further comprise an oil. Oils useful in each embodiment of the present invention include, for example, paraffinic oils, aromatic oils, naphthenic oils, hydrogenated (white) oils (such as Kaydol oil), plant and animal oils and their derivatives, petroleum-derived Oil or a combination thereof. If oil is present, it can be in an amount of 50 to 200 PHR (relative to the weight of the ethylene / α-olefin interpolymer). All values and subranges from 50 to 200 PHR are encompassed and disclosed herein, for example, the oil amount has a lower limit of 50, 70, 90, 110, 130, 150, 170, or 190 PHR and 60, 80, 100 , 120, 140, 160, 180 or 200 PHR. Oil is 50-200 PHR, alternative 50-130 PHR, alternative 70-180 PHR, alternative 80-12
It may be present in an amount of 0 PHR, or in the alternative, 130-190 PHR.

Optionally, various additives can be used in the compositions of the present invention. Additives include surfactants, flame retardants, scratch and scratch correction agents, antiblocking agents (a wide variety of primary amides, secondary amides and secondary bis-amides such as oleamide, erucamide, etc. And lubricants, including stearamide), lubricants, antibacterials (such as organometallics, isothazolones, organosulfurs and mercaptans); antioxidants (such as phenol,
Secondary amines, phosphites and thioesters); antistatic agents (such as quaternary ammonium compounds, amines, and ethoxylated, propoxylated or glycerol compounds); hydrolysis stabilizers; lubricants (fatty acids, Fatty alcohols, esters, aliphatic amides, metal stearates, paraffinic and microcrystalline waxes, silicones and orthophosphates, etc .; mold release agents (fine or powdered solids, soaps, waxes, silicones, polys) Glycols and complex esters such as trimethylolpropane tristearate or pentaerythritol tetrastearate); pigments, dyes and colorants; plasticizers (esters of dibasic acids (or their anhydrides) with monohydric alcohols, for example , O-
Phthalates, adipates and benzoates; thermal stabilizers (such as organotin mercaptides, octyl esters of thioglycolic acid and barium or cadmium carboxylates); UV stabilizers (hindered amines, o-hydroxy-phenylbenzotriazoles, 2-hydroxy, 4-alkoxyenzophenone
enzophenone), salicylic acid esters, cyanoacrylic acid esters, nickel chelates and benzylidene malonates and oxalanilides); and zeolites, molecular sieves and other known deodorants. An example of a hindered phenolic antioxidant is Irganox ™ 1076 antioxidant available from BASF. Each of the above additives, when used, is generally 5 wt% relative to the total weight of the composition
Not exceeding 0.001 to 2 wt%, preferably 0.01 to 1 wt%, more preferably 0.00.
It can be 1-5 wt%.

In some embodiments of the invention, the composition is a polydimethysiloxane.
oxane). When present, polydimethylsiloxane may be present in an amount of 0-0.5 wt% based on the total weight of the thermoplastic elastomer composition.

The inventive compositions disclosed herein can include at least one filler that can be used, for example, to adjust volume, weight, cost, and / or technical performance. Non-limiting examples of fillers useful in various embodiments of the present invention include talc, calcium carbonate, chalk, calcium sulfate, clay, kaolin, silica, glass, fumed silica,
Mica, wollastonite, feldspar, aluminum silicate, calcium silicate, alumina, alumina hydrates such as alumina trihydrate, glass microspheres, ceramic microspheres, thermoplastic microspheres, barite, wood flour, Examples include glass fiber, carbon fiber, marble dust, cement dust, magnesium oxide, magnesium hydroxide, antimony oxide, zinc oxide, barium sulfate, titanium dioxide, titanate, and combinations thereof. In some embodiments, the filler is
Barium sulfate, talc, calcium carbonate, silica, glass, glass fiber, alumina, titanium dioxide, or mixtures thereof. In other embodiments, the filler is talc, calcium carbonate, barium sulfate, glass fiber or mixtures thereof. US Pat. No. 6,103,803, which is incorporated herein by reference, and Zweifel Hans et al., “
Plastics Additives Handbook ", Hanser Gardner Publications, Cincinnati, Ohio, No.
Fillers disclosed in the 5th edition, Chapter 17, 901-948 (2001) can also be used in various embodiments of the present invention.

The amount of filler in the composition of the present invention can be 20 to 200 PHR (relative to the weight of the ethylene / α-olefin interpolymer). All values and subranges from 20 to 200 PHR are disclosed and included herein, for example, fillers are 30, 60, 90,
From the upper limit of 120, 150, 170 or 200 PHR to 20, 50, 80, 110,
It can exist from a lower limit of 140, 170 or 190 PHR. The filler is 20-100.
It may be present in an amount in the range of PHR, in the alternative 40-180 PHR, in the alternative 60-150 PHR, or in the alternative 100-130 PHR.

In the specific examples described herein, odor problems do not exist, but in some embodiments, inclusion of adsorbent inorganic additives improves the odor characteristics of the products provided herein. can do. About 0.1 to about 3 weight percent, or about 0, based on the total composition
. Addition of odor absorbing additives such as charcoal, calcium carbonate or magnesium oxide in the range of 5 to about 2 weight percent is effective in removing odor.

In other embodiments, the inventive compositions disclosed herein optionally comprise at least one UV stabilizer that can prevent or reduce degradation of the inventive composition by UV radiation.
Any UV stabilizer known to those skilled in the art can be added to the compositions of the present invention disclosed herein. Non-limiting examples of suitable UV stabilizers include benzophenone, benzotriazole, aryl esters, oxanilide, acrylate esters, formamidine, carbon black, hindered amines, nickel quenchers, hindered amines, phenolic antioxidants, metal salts , Zinc compounds and combinations thereof. If you use it,
The amount of UV stabilizer in the composition of the present invention is greater than about 0 to about 5 wt% of the total weight of the composition of the present invention,
It can be about 0.01 to about 3 wt%, about 0.1 to about 2 wt%, or about 0.1 to about 1 wt%. Several UV stabilizers are described in Zweifel Hans et al., Incorporated herein by reference.
“Plastics Additives Handbook”, Hanser Gardner Publications, Cincinnati, Ohio,
It is described in the 5th edition, Chapter 2, pages 141-426 (2001).

Optionally, the inventive compositions disclosed herein can include at least one lubricant. In general, lubricants are used, inter alia, to modify the rheology of the melt of the composition of the present invention to improve the surface finish of the molded article and / or to promote the dispersion of fillers or pigments. Can do. Any lubricant known to those skilled in the art can be added to the inventive compositions disclosed herein. Non-limiting examples of suitable lubricants include fatty alcohols and their dicarboxylic acid esters, fatty acid esters of short chain alcohols,
Fatty acids, fatty acid amides, metal soaps, oligomeric fatty acid esters, fatty acid esters of long chain alcohols, montan wax, polyethylene wax, polypropylene wax, natural and synthetic paraffin waxes, fluoropolymers and combinations thereof.
In some embodiments, the lubricant comprises an organopolysiloxane. In some embodiments, the organopolysiloxane has an average molecular weight of 40,000 or greater and at least 50
. It can have a viscosity of 000 cSt.

When used, the amount of lubricant in the composition of the present invention may be greater than 0 to 5 of the total weight of the composition of the present invention.
It can be 0.1 wt%, in an alternative, 0.1-4 wt%, or in an alternative, 0.1-3 wt%. Lubricants useful in various embodiments of the present invention are described in Zweifel Hans et al., “Plastics Additives Handbook”, Hanser Gardner, the disclosure of which is incorporated herein by reference.
Publications, Cincinnati, Ohio, 5th edition, chapter 5, pages 511-552 (2001).

Optionally, the composition of the present invention comprises a low temperature and / or a bacteriostatic and fungistatic compound.
Or it may contain antimicrobial agents to prevent and / or limit the growth of organisms commonly found in wet applications. The Dow Chr comprising a non-limiting example of an antimicrobial agent useful in the present invention, dichloro-octyl-isothiazolone; 10,10′-oxybisphenoxarsine; octyl-isothiazolone; and trichlorophenoxyphenol.
VINYZE from the electronic Company (Midland, Michigan)
Any one or combination of antibacterial agents available under the trade name NE ™. In a preferred embodiment, PolyChem Alloy (Lenoir, North Car)
zinc pyrithione and n-butyl-1,2-benzisothiazoneline sold under the trade name PolySept ™ 2003ZV-HF available from
A blend of 3-one (n-butyl-1,2-benzisothiazonlin-3-one) can be used in the inventive composition of the present invention.

Optionally, the compositions of the present invention can include additives to improve wear resistance. For example, but not limited to, the anti-wear additive useful in the present invention, the polydimethylsiloxane composition disclosed in US Pat. No. 5,902,854, the disclosure of which is incorporated herein by reference. Can be used in certain embodiments of the inventive composition.

In certain embodiments, the composition of the present invention comprises at least one thermoplastic vulcanizate (TPV).
, Hydrogenated styrene block copolymers (such as SEBS, or styrene-ethylene ethylene propylene styrene (SEEPS)), or combinations thereof, but do not exceed 50 wt% of the total elastomer content of the composition. Thermoplastic elastomers, unlike conventional vulcanized rubbers, are rubber-like materials that can be processed and recycled like thermoplastic materials. When the thermoplastic elastomer contains vulcanized rubber, the thermoplastic vulcanizate (T
PV). TPV is a thermoplastic elastomer having a chemically cross-linked rubber phase produced by dynamic vulcanization. One measure of this rubbery behavior is that the material is stretched to twice its original length at room temperature, held for 1 minute and then released within 1 minute of its original length. Shrink to less than 5 times (ASTM D1566). Another measure for the determination of tensile set is found in ASTM D412. The material refers to the ratio of recovery after deformation and is also characterized by a high elastic recovery that can be quantified as a percent recovery after compression. Fully elastic materials have 100% recovery, while fully plastic materials do not have elastic recovery. Yet another measure for determining compression set is found in ASTM D395.

An example of a commercially available TPV is manufactured by Advanced Elastomer Systems and is a cross-linked EPDM (“XL-EPDM”) in a crystalline polypropylene matrix.
) SATOPRENE ™ thermoplastic rubber, which is a mixture of particles. Another example is Ad
VYRAM ™ consisting of a mixture of polypropylene and natural rubber, marketed by vanced Elastomer Systems. Other suitable elastomers include the styrene block copolymer (SBC) brand, KRATON ™, and GLS Corporation, marketed by KRATON Polymers.
DYNAFLEX ™, a thermoplastic elastomer marketed by Ion and manufactured using KRATON ™ polymer.

Components of the composition of the present invention, i.e. ethylene / [alpha] -olefin interpolymer, at least one other polymer component, e.g. elastomer (e.g. TPV, styrene / ethylene-butene / styrene (SEBS) copolymer), polyolefin, For example, hPP
RCP, LDPE, or HDPE, etc., and optional additives, fillers and oils can be obtained by methods known to those skilled in the art, preferably the polyolefin and / or additive in the ethylene / α-olefin interpolymer. Can be mixed or blended using methods that can achieve an evenly uniform distribution. Non-limiting examples of suitable blending methods include melt blending, solvent blending, extrusion and the like.

In some embodiments, a physical blending device that achieves dispersive mixing, distributed mixing, or a combination of dispersive and distributed mixing can be useful in preparing a uniform blend. Both physical blend batch and continuous processes can be used. Non-limiting examples of batch processes include mixing equipment available from Brabender (eg, C. W. Braben).
der Instruments, Inc. South Hackensack, N .;
J. et al. BRABENDER PREP CENTER (TM) or BA available from
NBURY ™ closed mix and roll mill (Farrel Company, Ans)
onia, Conn. A method using a machine. Non-limiting examples of continuous processes include single screw extrusion, twin screw extrusion, disk extrusion, reciprocating single screw extrusion, and pin barrel single screw extrusion. In some embodiments, the additive can be added to the extruder through a feed hopper or feed port during extrusion of the ethylene / α-olefin interpolymer, polyolefin or composition of the present invention. Polymer mixing or blending by extrusion is described in C. Rauwendaal, “Polymer Extrusion”, Hanser P, incorporated herein by reference.
ublishers, New York, NY, pages 322-334 (1986).

When one or more additives are required in the composition of the present invention, the desired amount of additive can be one or more times divided into ethylene / α-olefin interpolymers, polyolefins or It can be added to the composition of the invention. Furthermore, this addition can be carried out in any order. In some embodiments, the additive is added first, mixed or blended with the ethylene / α-olefin interpolymer, and then the interpolymer containing the additive is blended with the polyolefin. In other embodiments, the additive is added first, mixed or blended with the polyolefin, and then the polyolefin containing the additive is blended with the ethylene / α-olefin interpolymer. In a further embodiment, the ethylene / α-olefin interpolymer is first blended with the polyolefin and then the additive is blended with the composition of the present invention.

The first thermoplastic elastomer composition may comprise a combination of two or more embodiments as described herein.

  The second composition can comprise a combination of two or more embodiments as described herein.

Articles of Use Using the Composition of the Present Invention The present invention further provides an article of manufacture comprising at least one component formed from the composition of the present invention. Examples of products that can be produced from the composition of the present invention include gaskets,
Profile materials (including, for example, profile materials used in refrigerators and / or freezers), molded products, overmolded products, sheet materials, and tube materials.

Some embodiments of the product of the present invention are less than 70 percent at 70 ° C., in an alternative, 65%
Less than, or in the alternative, has a compression set of less than 60%.

  In one embodiment, the item is a gasket.

  In another embodiment, the item is a profile.

Definitions The term “composition” as used herein includes a mixture of materials comprising the composition, as well as reaction products and degradation products formed from the materials of the composition.

The term “polymer” as used herein refers to a polymeric compound prepared by polymerizing the same or different types of monomers. The generic term polymer is therefore the term homopolymer (taken to refer to polymers prepared from only one type of monomer with the understanding that trace amounts of impurities may be incorporated into the polymer structure), And the term interpolymer as defined below.

The term “interpolymer” as used herein refers to a polymer prepared by the polymerization of at least two different types of monomers. The generic term interpolymer thus includes copolymers (taken to refer to polymers prepared from two different types of monomers), and polymers prepared from three or more different types of monomers.

The term “ethylene / α-olefin interpolymer” as used herein includes a large amount of ethylene monomer (based on the weight of the interpolymer) and at least one α-olefin in polymerized form. Refers to interpolymer.

The term “ethylene / α-olefin copolymer” as used herein refers to a large amount of ethylene monomer (based on the weight of the copolymer) in polymerized form, and α-
Refers to a copolymer containing olefins as only two monomer types.

The term “propylene / α-olefin interpolymer” as used herein includes a large amount of propylene monomer (based on the weight of the interpolymer) and at least one α-olefin in polymerized form. Refers to interpolymer.

The term “propylene / α-olefin copolymer” as used herein refers to polymerized forms of large amounts of propylene monomer (based on the weight of the copolymer) and α-olefin as only two monomer types. Refers to a copolymer comprising.

The term “propylene / ethylene copolymer” as used herein refers to
Refers to a copolymer containing a large amount of propylene monomer (relative to the weight of the copolymer) and ethylene as the only two monomer types in polymerized form.

The terms “comprising”, “including”, “having” and their derivatives refer to the presence of any additional components, steps or procedures that are specifically disclosed. Regardless, it is not intended to be excluded.
For the avoidance of doubt, all compositions claimed through the use of the term “comprising” do not contain any additional additives, adjuvants, or compounds (whether polymers or not). May be included unless otherwise specified. In contrast, the term “consisting essentially of” excludes any other ingredient, step or procedure from the scope of any subsequent enumeration, except those not essential to the feasibility. To do. The term “consisting of” excludes any component, step or procedure not specifically described or listed.

The term “elastomer” as used herein is any melt processable with continuous elastomeric phase domains enhanced by dispersed hard (glass or crystalline) phase domains that act as contact points over a limited temperature range. Refers to a polymer blend or copolymer.

The term “thermoplastic” as used herein refers to a material that can be repeatedly melted (soft) and solidified (hard) through heating and cooling, respectively.

The term “semicrystalline polymer” as used herein refers to a polymer having regions of crystalline molecular structure and amorphous regions.

The term “elastomeric polymer” as used herein refers to a thermoplastic elastomer.

The terms “blend”, “polymer blend” and like terms, as used herein, refer to a composition of two or more polymers. Such blends may or may not be miscible. Such a blend may or may not be phase separated. Such blends may have one or more domain configurations as determined from transmission electron spectroscopy, light scattering, x-ray scattering, and any other method known in the art. May be.

The term “pre-compounded” as used herein refers to a polymer that is used prior to any post-reactor compounding or modification of such polymers to make polymer blends. Such polymers may contain small amounts of unstable processing oil from processing equipment or additional slurry, but are still considered to contain no oil. If the oil is intentionally added to the polymer prior to post-reactor compounding or modification, the amount of oil is determined relative to the weight of the polymer. For “polymer containing 25% oil”, a 1 kg sample contains 0.2 kg oil and 0.80 kg polymer.

Polymers designated as “free flowing” do not preclude the use of surface additives such as talc or polyethylene powder to enhance the free flowing properties of the products used.

Test Method Examples of the test method used for characterizing the components of the examples and comparative examples of the present invention include the following tests.

Each test sample (other than the examples of the present invention and comparative examples shown in Table 11) was added to the Krupp.
Fully meshed co-rotating twin screw extruder manufactured by Werner Pfleiderer Corporation (Model ZSK-25, 25m with a length to diameter ratio of 48: 1
m screw diameter). The extruder was equipped with a two-hole strand die, a water bath and a pelletizer for producing a resin in the form of pellets. Each material was starved into the extruder using a screw-type powder feeder. Conditioning zone 1 of the extruder
To zone 7 are 140 ° C., 190 ° C., 190 ° C., 190 ° C., 190 ° C., 19
It was 0 ° C., 190 ° C., and 180 ° C. for the die. A 500 RPM was used at a chiller temperature of 10 ° C. The examples in Table 11 were processed using the conditions shown in Table 12.

All samples other than the examples of the present invention and comparative examples shown in Table 11 used for TMA, DMS, Shore A hardness, NOBI, compression set, SRI, tensile strength and elongation at break, and adhesive strength 440F flat barrel profile (4 for each example in Table 11)
4 inch × 6 inch × 0.125 inch (10.16 cm × 15.24 cm × 0.32 cm) mold with a 18 F flat barrel profile) and a mold temperature of 18.33 ° C. and 25 cc / s It was an injection molded plaque that was injection molded on an Arburg 370C-80 ton injection molding machine using the injection speed. Annular die (inner diameter (ID) = 2.54m)
m, wall thickness = 0.42 mm), the compound was extruded with a Haake single screw extruder. The extruded pipe profile was air cooled on a conveyor. Once stabilized, the top pressure and torque were measured at various RPMs ranging from 20 to 160. Each sample was collected at each RPM.
Visual observation was performed about the surface roughness and shape retention property of each collect | recovered sample.

Standard CRYSTAF method CRYS commercially available from PolymerChar, Valencia, Spain
Branch distribution is determined by crystallization analysis fractionation (CRYSTAF ™) using TAF 200 units. Each sample is dissolved in 1 hr, 1,2,4-trichlorobenzene at 160 ° C. (0.66 mg / mL) and stabilized at 95 ° C. for 45 minutes. Sampling temperature is 0.2 ° C
It is the range of 95-30 degreeC with the cooling rate of / min. The polymer solution concentration is measured using an infrared detector. The cumulative dissolved concentration is measured when the polymer crystallizes as the temperature decreases. The analytical derivative of the cumulative profile reflects the short chain branching distribution of the polymer.

CRYSTAF peak temperature and area are determined using CRYSTAF software (version 2
001. b, PolymerChar, Valencia, Spain). The CRYSTAF peak finding routine identifies the peak temperature as the maximum value of the dW / dT curve and identifies the area between the largest positive inflections on either side of that identified peak in the derivative curve. The preferred processing parameter for calculating the CRYSTAF curve has a temperature limit of 70 ° C., and the smoothing parameter is 0.1 above the temperature limit and 0.3 below the temperature limit.

Each sample is compression molded using bend / secant modulus ASTM D 1928. Measure bending and 2 percent secant modulus according to ASTM D-790.

Differential scanning calorimetry TAI model Q1000 DSC with RCS cooling aid and autosampler
To obtain the differential scanning calorimetry result. A nitrogen purge gas flow of 50 ml / min is used. The sample was pressed into a thin film at 175 ° C. and 30000 psi for 5 minutes and then air cooled to room temperature (25 ° C.). Next, the pressed sample (3 to 10 mg) was cut to a diameter of 6 m.
m discs, weighed accurately, placed in a light aluminum pan (about 50 mg), then crimped closed. The following temperature profile is used to investigate the thermal behavior of the profile composition sample. The sample is heated rapidly to 230 ° C. and held isothermal for 3 minutes to erase all previous thermal history. Next, the sample is cooled to −90 ° C. at a cooling rate of 10 ° C./min and held at −90 ° C. for 3 minutes. The sample is then heated to 230 ° C. at a heating rate of 10 ° C./min.
Record the cooling and secondary heating curves. The crystallization temperature is indicated as Tc (° C.).

The DSC melting peak is measured as the maximum heat flow rate (W / g) relative to the linear baseline drawn between −40 ° C. and the end of melting. The heat of fusion is measured as the area under the melting curve between −40 ° C. and the end of melting using a linear baseline.

For olefin block copolymers or ethylene / α-olefin interpolymers, cooling to −40 ° C. is performed instead of cooling to −90 C, and heating to 150 ° C. is performed instead of heating to 230 ° C.

The DSC melting peak is measured as the maximum heat flow rate (W / g) relative to the linear baseline drawn between −30 ° C. and the end of melting. The heat of fusion is measured as the area under the melting curve between −30 ° C. and the end of melting using a linear baseline.

DSC calibration is performed as follows. First, a baseline is obtained by performing a DSC from −90 ° C. without any sample in the aluminum DSC pan. Then 7 milligrams of a new indium sample was heated to 180 ° C. and the sample was 10 ° C./mi to 140 ° C.
Cool at a cooling rate of n, then hold the sample isothermally at 140 ° C. for 1 minute, and then analyze the sample by heating from 140 ° C. to 180 ° C. at a heating rate of 10 ° C./min. The melting heat and melting start point of the indium sample were obtained, and the melting start point was measured from 156.6 ° C.
. It is within 5 ° C, and the heat of fusion is confirmed to be within 28.71 J / g to 0.5 J / g. The deionized water is then analyzed by cooling a small drop of fresh sample from 25 ° C. to −30 C at a cooling rate of 10 ° C./min in a DSC pan. The sample is held isothermally at −30 ° C. for 2 minutes and heated to 30 ° C. at a heating rate of 10 ° C./min. Obtain the melting start point, 0 ° C
To within 0.5 ° C.

Calculation of percent crystallinity The heat of fusion (ΔHf) determined from the second thermal curve is 292 J / g for PE (165 J for PP (a propylene-based polymer with the majority of the weight percent being polymerized propylene)).
The percent crystallinity is calculated by dividing by the theoretical heat of fusion of / g) and multiplying this amount by 100 (eg,% crystallinity = (ΔHf / 292 J / g) × 100 (PE (weight percent (Ethylene-based polymer, most of which is polymerized ethylene)) As described above, the melting point (s) (Tm) of each polymer sample is determined from the second thermal curve obtained from DSC. The crystallization temperature (Tc) is measured.

GPC method For gel permeation chromatography (GPC) measurements, the chromatography apparatus used is a Polymer Laboratories model PL-210. The column and carousel compartments were operated at 145 ° C. 1,24 Trichlorobenzene (TCB)
Polymer Laboratories 20 μm Mi using
An xed-ALS column was used. Each sample was prepared at a concentration of 0.1 g polymer in 50 mL solvent. The solvent is 200 ppm antioxidant butylated hydroxytoluene (BHT)
Contained. Each sample was prepared by agitating lightly at 160 ° C. for 1-2 hours. The injection amount was 200 microliters, and the flow rate was 1.0 ml / min. Varian
Inc. Calibration of the GPC column set was performed using narrow molecular weight distribution polystyrene standards purchased from (formerly Polymer Laboratories). Williams
, T., and IM Ward, “The Construction of Polyethylene Calibration Curve for
Gel Permeation Chromatography Using Polystyrene Fractions ", J. Polym. Sci. Poly
m. Lett., 6, 631 (1968): M _polyethylene = 0.431 (M _polystyrene ) was used to convert the peak molecular weight of the polystyrene standard to polyethylene molecular weight.

Calculation of molecular weight of polyethylene equivalents is performed using Viscotek TriSEC software version 3.0.

ATREF analysis US Pat. No. 4,798,081, both of which are incorporated herein by reference in their entirety.
And Wilde, L .; Ryle, TR; Knobeloch, DC; Peat, IR; Determination of Branc
hing Distributions in Polyethylene and Ethylene Copolymers, J. Polym. Sci., 20,
Analytical temperature rising elution fractionation (ATREF) analysis is performed according to the method described in 441-455 (1982). The composition to be analyzed is dissolved in trichlorobenzene and crystallized in a column containing an inert support (stainless steel shot) by slowly lowering the temperature to 20 ° C. at a cooling rate of 0.1 ° C./min. The column is equipped with an infrared detector. Then:
By eluting the crystallized polymer sample from the column by slowly increasing the temperature of the eluting solvent (trichlorobenzene) from 20 to 120 ° C. at a rate of 5 ° C./min, an ATREF chromatogram curve is generated. .

¹³ C NMR analysis Each sample is prepared by adding approximately “3 g of a 50/50 mixture of tetrachloroethane-d ² / orthodichlorobenzene” to a “0.4 g sample” in a 10 mm NMR tube. Each sample is dissolved and homogenized by heating the tube and its contents to 150 ° C. JEOL Eclipse ™ 400 MHz spectrometer or Varian Un
The data corresponding to the ¹³ C resonance frequency of 100.5 MHz is collected using an ity Plus ™ 400 MHz spectrometer. Data is acquired using 4000 transients per data file with a 6 second pulse repetition delay. Numerous data files are combined to minimize signal-to-noise for quantitative analysis. Spectral width is 25,000Hz
And the minimum file size is 32K data points. Each sample is analyzed at 130 ° C. with a 10 mm broadband probe. Comonomer incorporation is described by Randall's triad method (Randall, JC; JMS-Rev. Macromol. Chem, which is incorporated herein by reference in its entirety).
Phys., C29, 201-317 (1989)).

Stress-strain ASTM D 1708 micro-tensile specimens are used to measure stress-strain behavior in uniaxial tension. Each sample is stretched at 500% min ⁻¹ using an Instron at 21 ° C. Tensile strength and elongation at break are reported from an average of 5 specimens. Type C tear was measured using ASTM-882.

The block index ethylene / α-olefin multiblock copolymer is greater than zero and up to about 1.0
Characterized by an average block index of ABI, ABI and a molecular weight distribution greater than about 1.3, M _w / M _n . The average block index, ABI, is obtained in increments of 5 ° C. from 20 ° C. and 110 ° C. (1 ° C.) in preparative TREF (ie fractionation of the polymer by temperature rising elution fractionation).
Other temperature increments, such as 2 ° C., 10 ° C., etc.) are weight averages of the block index (“BI”) of each polymer fraction,
ABI = Σ (w _i BI _i )
Where BI _i is the block index of the i-th fraction of the inventive ethylene / α-olefin interpolymer obtained in preparative TREF, and w _i is the weight percent of the i-th fraction. . Similarly, the square root of the second moment around the average value, referred to below as the second moment weight average block index, can be defined as:
Second moment weight average BI =
Where N is defined as the number of fractions with BI _i greater than zero.

BI is defined by one of the following two equations (both yield the same BI value):
Wherein, _{T X} is the i th fraction of ATREF (i.e., analytical TREF) elution temperature (preferably expressed in Kelvin), _{P X} is the ethylene mole fraction of i th fraction, described below It can be measured by NMR or IR as follows. P _AB is the ethylene mole fraction of the entire ethylene / α-olefin interpolymer (before fractionation), again NMR or I
R can be measured. T _A and P _A are the ATREF elution temperature and the ethylene mole fraction of pure “hard segments” (referring to the crystalline segments of the interpolymer). As an approximation, or for polymers with unknown “hard segment” composition, T
_A and P _A values are set to T _A and P _A of high density polyethylene homopolymer. T _AB
Is the ATREF elution temperature for a random copolymer of an olefin block copolymer with the same composition (having an ethylene mole fraction of P _AB) and molecular weight. T _AB can be calculated from the molar fraction of ethylene (measured by NMR) using the following equation:
Where α and β are well-characterized multiple preparative TRs of a well-characterized random copolymer having a wide composition and / or a narrow composition.
Two constants that can be determined by calibration using the EF fraction. Note that α and β can vary from instrument to instrument. In addition, an appropriate calibration curve for the polymer composition of interest must be generated using the molecular weight range and comonomer type appropriate for the preparative TREF fraction and / or random copolymer used to create the calibration. . There is a slight molecular weight effect. Such effects are essentially negligible when calibration curves are obtained from similar molecular weight ranges. In some embodiments, the random ethylene copolymer and / or the preparative TREF fraction of the random copolymer has the following relationship:
Meet.

The above calibration equation relates the molar fraction of ethylene, P, to the analytical TREF elution temperature, T _ATREF , for preparative TREF fractions of narrow and / or broad composition random copolymers. T _XO is the same composition (i.e., the same comonomer type and content) and and the same molecular weight, is the ATREF temperature for a random copolymer having an ethylene mole fraction of P _X. T _XO is, by _{P X} mole fraction was measured, "LnPX = α /
It can be calculated from “T _XO + β”. Conversely, P _XO is the same composition (i.e., the same comonomer type and content) and the same molecular weight, the ethylene mole fraction for a random copolymer having an ATREF temperature of T _X, using the values of the measured T _X Ln P _X
It can be calculated from _O = α / T _X + β. Once the block index (BI) of each preparative TREF fraction is obtained, the weight average block index, ABI, of the entire polymer can be calculated.

Thermomechanical analysis Thermomechanical analysis (TMA) (penetration temperature) is performed on an injection molded plaque. The equipment used is P
TMA 7 ™ available from erkin-Elmer. In the test,
A probe with a 1.5 mm rounded tip (P / N N519-0416) is applied to the surface of the sample with 1 N force. The temperature is increased from 25 ° C. at 5 ° C./min. The probe penetration distance is measured as a function of temperature. The experiment shows that the probe is 1000 μm (1 mm
) After entering and reporting all TMA temperatures with a penetration depth of 1000 μm, it ends.

Dynamic mechanical spectroscopy Rheology was measured using dynamic mechanical spectroscopy (DMS). DMS experiment is 25m
Performed at 190 ° C. on a Rheometrics ARES equipped with m parallel plates. A sample disk (25 mm in diameter) was cut from the injection molded plaque and purged with nitrogen. Its frequency is 0
. It fluctuated between 1 and 100 rad / s. The strain amplitude was adjusted between 4 and 10% based on the response of each sample. The rheological ratio (RR) was calculated as the ratio of the complex viscosity at 0.1 rad / s to the complex viscosity at 100 rad / s. Tan δ, which is the ratio of loss modulus (G ″) to storage modulus (G ′), was characterized by 0.1 rad / s.

Calculation of shape retention index (SRI) 4 and 10% automatically adjusted to prevent 1 rad / s frequency and over-torque in parallel plate placement with ARES instrument made by Rheometric Scientific
90 ° C. to 190 ° C. for all compounds using a 25 mm parallel plate geometry with a strain between
DMS-temperature gradient experiments are performed. 130 ° C to 19 commonly used in the extrusion process
Plot tan delta log as a function of log complex viscosity over a temperature range such as 0 ° C.
A straight line can be fitted to the log tan delta plot for this log complex viscosity,
Then, the linear equation by linear regression in MICROSOFT OFFICE EXCEL 2003 can be extrapolated from 1 to 5 to the log viscosity curve to obtain the value of tan (delta) at an arbitrary viscosity. An ideal profile composition should have a low viscosity to extrude at high line speeds without generating melt fracture of the profile surface. Also, to prevent the profile from collapsing, these compounds are low tan (delta)
Should have. The shape retention index, SRI, is defined as the value of tan (delta) at a specific viscosity determined by the above DMS-temperature gradient extrapolation, SRI = 100-1000
Tan (delta) at a specific viscosity in the range of 0 Pas. 25mm diameter for DMS test
Disc samples were punched from injection molded plaques, the overall dimensions were 10.16 cm x
15.24 cm × 0.32 cm.

Density Density (g / cm ³ ) was measured in isopropanol according to ASTM-D 792-03, Method B. Prior to measurement, the specimens were conditioned in an isopropanol bath at 23 ° C. for 8 minutes to reach thermal equilibrium, and then the specimens were measured within 1 hour after molding. ASTM D-4
The specimen was compression molded according to 703-00 Annex A and was first cooled at a rate of 15 ° C./min at about 190 ° C. for a 5 min heating period according to Procedure C. The test piece was cooled to 45 ° C. with a press and continued to cool until it felt “cold to touch”.

Melt Index and Melt Flow Rate The melt index (I ₂ ) of the ethylene polymer is measured according to ASTM D-1238-04, conditions 190 ° C./2.16 kg. ASTM D-1238-04, Condition 1
The melt index (I ₅ ) of the ethylene polymer is measured according to 90 ° C./5.0 kg. The melt index (I ₁₀ ) of the ethylene polymer is measured according to ASTM D-1238-04, conditions 190 ° C./10.0 kg. According to ASTM D-1238-04, conditions 190 ° C./21.0 kg, high load melt index (I
₂₁ ) is measured. For propylene-based polymers, the melt flow rate (MFR) is measured according to ASTM D-1238-04, conditions 230 ° C./2.16 kg.

Shore A Hardness Shore A hardness was measured with an injection molded plaque having a thickness of 0.32 cm according to ASTM D2240. This test method allows for hardness measurements based on the initial indentation or indentation after a specified period, or both. As used herein, indentation was measured at a specified time of 10 seconds.

Tensile and Elongation Properties Tensile strength and elongation at break were measured using ASTM D 1708, a micro-tensile method using a pulling speed of 5 inches / minute in the flow direction of the injection molded plaque. The dimensions of the injection molded plaque were 101.6 mm x 152.4 x 3.2 mm.

Compression set Compression set was measured at 23 ° C, 40 ° C and 70 ° C according to ASTM D-395.
Samples were prepared by stacking 25.4 mm diameter circular discs cut from 0.125 inch thick injection molded plaques to a total thickness of 12.7 mm. Arb
Injection molding was performed on a urg 370C-80 ton injection molding machine using a 101.6 mm x 152.4 x 3.2 mm plaque mold. General processing conditions for sample preparation include the following. Extruder conditions of barrel and mold temperature, zones 1 to 4 and 205 ° C for nozzle and 15 ° C for mold; RPM 30 (m / min), back pressure 15 bar, extrusion rate 70 cubic centimeters (cc), and actual extrusion rate 72 cc Injection speed 25 cc / second, transfer position 15 cc, transfer pressure 327 bar, filling time 2.37 seconds, and cushion 7.1c
c optimal injection parameters; pressure holding conditions at 300 bar; holding time 40 seconds, cooling time 20 seconds, extrusion time 7.2 seconds and cycle time 68.8 seconds. Based on the ISO 815-type B method, compression set after 24 hours (h) at 40 ° C. or 60 ° C. may be reported at 25% strain using a 13 mm circular disc, 6 mm thickness. Injection molding plaque (
Samples cut from 0.125 "thickness) are stacked up to a maximum thickness of 6 mm.

Normalized oil bleed index Normalized oil bleed index (NOBI) is an optical measurement for comparing oil bleed characteristics. The formed plaques are aged for 3 weeks (at 23 ° C. and 70 ° C.) on a sheet of ZigZag ™ tobacco paper. After aging, the tobacco paper is removed and optically scanned against a black background to measure the degree of oil bleed. Xerox
Scans are performed using a WorkCenter ™ M118i copier / fax / scanner. The image is scanned in 200 dpi “text” mode and saved as a TIFF file. Open the TIFF file with MS Paintbrush, trim two sides and then save. Next, the image is opened with Photoshop CS2 (v.9), and the remaining two sides are trimmed. The image is then converted to an 8-bit grayscale image so that a grayscale histogram can be created. Next, Photoshop
The grayscale image is analyzed using op software to create a histogram showing each percentile of the four quadrants of grayscale ranging from 0 (black) to 255 (white). Record the average grayscale percentile. For example, 1% of pixels are in levels 0 to 64 of the grayscale quadrant and 3% of pixels are 65 in the grayscale quadrant.
~ 128 levels, 15% at 129 ~ 192 levels in the grayscale quadrant, 3
If 1% is in the 193-255 level of the grayscale quadrant, the device has an average of 12.2.
Calculated to be 5%. The following equation:
Normalized oil bleed index = 100 · (grayscale sample% −grayscale control%) / (100−grayscale control%)
To calculate a normalized oil bleed index (NOBI).

The term “% grayscale sample” is the percent grayscale measured for the aged sample, and “% grayscale control” is the measurement for the untreated tobacco sheet. NOBI has a range of 0-100. NOBI = 1
At 00, the paper is saturated and no oil bleed above that level is recorded in the test.

Adhesion Adhesion was measured using a ChemInstruments EZ Lab compatibility loop tack tester (model LT-1000). The test sample was an injection molded or compression molded bar “4” × 6 ”× 0.125”. For each polymer composition, 5 bars were tested and the average was recorded.

The test bar was conditioned for 7 days at 70 ° C. in a forced convection oven before testing for tack. The test method is a modified version of ASTM D6195-03, “Standa
rd Test Methods for Loop Tack "(Reference: 3Annual Book of ASTM Standards, Vol.
15.06.). For each test, a bar was placed on the lower support of the loop tack tester. A “5 mm thick” MYLAR strip (1 inch × 6 inches) was cut using a “1 inch × 6 inch” die. The end of the MYLAR strip was trimmed to form a “1 inch × 5 inch” strip. The MYLAR strip was folded into a loop with the glossy side facing out and placed on the top grip of the loop tack tester. With only the weight of the MYLAR strip itself applied as a force, the outer surface of the loop was in controlled contact with the “1 inch × 1 inch” surface of the test bar specimen. Next, the M
The YLAR strip was peeled from the substrate, and the force for peeling the MYLAR strip from the contact surface was measured by a recording instrument.

Mooney Viscosity Polymer Mooney viscosity (ML 1 + 4 at 125 ° C.) was measured according to ASTM 1646-04 with a preheat time of 1 minute and a rotational run time of 4 minutes. The instrument is Alpha Te
Chronology Rheometer MDR.

The following examples illustrate the invention but are not intended to limit the scope of the invention. The weight percentage of each component of the inventive examples and comparative examples is
Unless otherwise specified, it is relative to the total weight of the formulation.

Table 1 lists the ingredients used in the preparation of the examples and comparative examples of the present invention. NORD
EL IP hydrocarbon rubber, ENGAGE polyolefin elastomer, VERSIFY elastomer and plastomer and INFUSE olefin block copolymer are:
Available from The Dow Chemical Company, PROFAX
The resin is a Lyondellbasell Industries N.I. V. (Rotte
rdam, Netherlands) and LUPEROX compounds are available from A
rkema, Inc. Organic peroxide available from (Philadelphia, PA).

In each of Tables 2-6, the component polymers are given in weight percent. Imer
Calcium carbonate available from ys Performance Minerals under the trademark ATOMITE, and MB50-002 MAST from Dow Corning
MB50-002 (polyethylene (LDPE)) available under the trade name ERBATCH
A masterbatch of pelletized formulation containing 50% ultra high molecular weight siloxane polymer dispersed in a homopolymer) was used in the inventive examples and comparative examples in Tables 2-6.

As used in all tables herein, the term “NM” means “not measured”.

Tables 2A-2B below show examples of the present invention ("Inventive Ex.").
1 and Comparative Example ("Comparative Ex.") AD, the respective formulations and the observed properties. Each of the formulations in Tables 2A-2B contains 15 wt% oil. The tensile properties shown in Tables 2A-2B were measured according to ASTM D638 (508 mm / sec pull rate). The black concentrate used is Amerchem, In
c. And is sold under the trade name ESCORENE AN13K.

Tables 2A and 2B show that Example 1 of the present invention is a tensile that meets the overall validity criteria,
It illustrates that it exhibits elongation and compressibility. In contrast, each comparative example does not meet the overall validity requirements. Comparative Examples C and D do not meet the SRI requirements of the present invention,
Comparative Examples A and B do not meet the compression set requirement of the present invention.

Tables 3A-3B show Examples 2-5 and Comparative Example E of the present invention, their respective formulations and observed properties. Each of the formulations in Tables 3A-3B contains 25 wt% oil.

Examples and comparative examples of the invention shown in Tables 3A and 3B are SEBS or OBC
Exemplifies that high temperature compression set can be reduced by adding to the EDPM formulation as compared to a formulation containing only EDPM, oil and filler. As can be seen from Table 3A, each of the embodiments of the present invention meets the requirements of the present invention for overall validity. Table 3B shows Comparative Example E
Exemplifies that at least the SRI requirements of the composition of the invention are not met.

Tables 4A-4B show Examples 6-7 and Comparative Examples FH of the present invention, their respective formulations and observed properties.

Table 4A illustrates that Examples 6 and 7 of the present invention each meet the composition and overall validity requirements of the present invention. Table 4B illustrates that Comparative Examples F and H contain vulcanizing agents and / or auxiliaries. Comparative examples G and H do not meet at least the overall validity requirements of the present invention. Tables 5A-5B show the formulations and observed properties of Examples 8-10 and Comparative Examples I-M of the present invention.

Tables 5A-5B show the formulations and observed properties of Examples 8-10 and Comparative Examples I-M of the present invention.

Table 5A illustrates that each of Examples 8-10 of the present invention meets the overall validity requirements of the present invention. Comparative Examples J and K each contain peroxide-modified OBC (see Table 1). As can be seen from Table 5B, Comparative Examples I, L, and M do not meet at least the overall validity requirements of the present invention.

Tables 6A-6B show Examples 11-13 and Comparative Examples N-Q of the present invention, their respective formulations and observed properties.

As can be seen in Table 6A, each of Examples 11-13 of the present invention meets all requirements of the composition of the present invention. Comparative Examples N and O do not meet the overall validity requirements of the present invention. Comparative Example P contains peroxide-modified OBC (see Table 1).
. Comparative Example Q was modified with peroxide (see Table 1).

Table 7 shows the components of the formulations shown in Tables 8-10. Table 8 shows Example 1 of the present invention.
4 to 16 and Comparative Examples R to S are shown. Each of the inventive examples and comparative examples in Table 8 contain 72.5 PHR of oil. Table 9 shows the formulations of Examples 17-19 and Comparative Examples TU of the present invention. Each of the inventive examples and comparative examples in Table 9 is 13
Contains 0 PHR oil. Table 10 shows the formulations of Examples 20 to 22 and Comparative Examples V to W of the present invention. Each of the inventive examples and comparative examples in Table 10 contain 190 PHR of oil.

Table 11 shows the formulations of Examples 23 to 26 and Comparative Examples X to Y of the present invention. Table 11
All amounts of are in percent by weight. Table 12 shows ZSK-3 with two-stage injection port
Table 11 shows the extruder conditions for each sample of the inventive examples and comparative examples of Table 11 prepared with a 0 twin screw extruder. Table 13 shows the characteristics of Examples 23 to 26 and Comparative Examples X to Y of the present invention.

Comparative Examples R, T and V use EP rubber with a delta H of less than 36 J / g, and the final product adhesive strength results in an IS of over 0.012N which is ineligible from the point of view of stickiness. Comparative Examples S and U use an EP rubber having a Mooney viscosity approaching 20 below the preferred range of greater than 55. These Samples S and U NOBI are ineligible because such low Mooney polymers cannot retain high levels of oil. Comparative Example W is
VISTALLON containing 75 phr of oil supplied as a bale rather than a pellet
3666 is used and is not the preferred means for thermoplastic extrusion compounders.

On the other hand, Examples 14 to 22 of the present invention are blends containing an ethylene / α-olefin interpolymer having a ΔHf of more than 36 J / g and a Mooney viscosity of more than 55, and further containing HDPE. These compositions also have a rheological ratio greater than 25. The formulations of the examples of the present invention have the correct balance of Shore A hardness, compression set at high temperature, low tack, low oil bleed, tensile strength, elongation, and TMA.

Comparative Example R shows adhesive strength that is too high (note that ΔHf for R07 is ΔHf of 34 J / g). Comparative Example S includes R04 having a Mooney viscosity of less than 55.
Comparative Example S also had high adhesive strength.

Examples 22-26 of the invention are formulations having EPDM with Component A and HDPE as Component B having a ΔHf greater than 36 J / g and a Mooney viscosity greater than 55. These formulations also have a rheological ratio greater than 25. These inventive compositions have a Shore A hardness,
FIG. 5 illustrates the balance of the present invention of compression set at high temperature, low tack, low oil bleed, tensile strength and elongation. Comparative Example Y did not have HDPE and the shape was deformed. Comparative Example X had a NOBI value of 100 indicating significant oil bleed. The remaining comparative examples did not have an optimal balance of properties.

EPDM 1 / HDPE 1 (75/25 or 3/1 ratio) +1 wt% PDMS (M
Example 27 of the present invention containing B50-002) was prepared using a continuous mixer.
EPDM 1 has a Mooney viscosity of 70 (ML (1 + 4) at 125 ° C.), a ΔHf of 39.4
And an MWD of 3.04. HPDE 1 has a density of 0.954 g / cc and a melt index (I ₂ ) of 20 g / 10 min.

Inventive Example 27 was formed in a Farrel CP 250 continuous mixer. The mixer has two dams at the 4 and 5 positions and a vent in the middle of the 7/8 position.
It had a 2.88 inch 7/7 rotor combination. EPDM 1 (74.25 wt%) and HDPE 1 (24.75%) and P through a loss-in-weight feeder
DMS (MB50-002 MASTERBATCH) (1% based on the total weight of the composition)
) And each polymer was melted and compounded in the mixer. 300 pounds /
Residence time was controlled by time feed rate, 45-65% orifice opening, and mixer rotation speed of 300-450 RPM. The mixer conditions are shown in Table 14.

As each polymer is mixed, the compounded ribbon is then 4 inches of 11/1 L.
/ D was fed to the extruder and extruded into strands. A 6-hole strand die was used. Each strand was then passed through a 16 foot water bath with an initial water temperature of 20 ° C. before being cut into pellets. The extruder conditions are shown in Table 15.

  Some rheological properties of this example are listed below in Table 16.

Example 27 of the present invention has excellent rheological properties (eg, V0.1 / V100 = 28),
And has good shear thinning behavior. This example also had good shape retention and shape controllability.

The present invention may be embodied in other forms without departing from the spirit and essential characteristics of the invention, and therefore, rather than the foregoing specification showing the scope of the invention, the appended claims will be described. Should be referenced.

Claims (21)

At least one elastomeric polymer selected from the group of ethylene / α-olefin interpolymers and propylene / α-olefin interpolymers, at least selected from the group of component A, polypropylene homopolymer, propylene / ethylene copolymer and high density polyethylene 100 for a composition comprising one semicrystalline polymer, component B, at least one oil, and at least one filler and having a TMA greater than 85 ° C.
A first thermoplastic elastomer composition characterized by an SRI of less than 1.6 at 00 Pa-s and less than 4.5 at 1000 Pa-s. The first thermoplastic elastomer composition according to claim 1, characterized by an SRI of not more than 1.5 at 10,000 Pas. Further characterized by a hardness in the range of 40-85 Shore A, a tensile strength of 2-8 MPa, an elongation> 400%, and a compression set of 30-75% at 40 ° C. as measured by ISO 815, Type B method. Item 1. The first thermoplastic elastomer composition according to Item 1. The first thermoplastic elastomer composition of claim 1, wherein component A is one or more EPDMs. Component A is 20 wt% to 5 wt% in total with respect to the total weight of the first thermoplastic elastomer composition
The first thermoplastic elastomer composition of claim 1, wherein the first thermoplastic elastomer composition is one or more olefin block copolymers in an amount of 0 wt%. The thermoplastic elastomer composition of claim 1, wherein the elastomeric polymer, Component A, is an ethylene / α-olefin copolymer. An elastomeric polymer, component A is an ethylene / α-olefin interpolymer,
A first thermoplastic elastomer composition according to any preceding claim, wherein the semicrystalline polymer, component B, is high density polyethylene. i) Component C, an ethylene / α-olefin interpolymer having a Mooney viscosity (ML 1 + 4, 125 ° C.) of 55 or greater and a ΔHf of 36 J / g or greater; and ii) Component D, High Density Polyethylene (HDPE)
A second composition comprising:   9. The second composition of claim 8, wherein component C has an MWD of less than 4. 10. The second composition according to claim 8 or claim 9, wherein the ethylene / [alpha] -olefin interpolymer is an ethylene / [alpha] -olefin / diene interpolymer. 11. The second composition of claim 10, wherein the ethylene / [alpha] -olefin / diene interpolymer has a rheological ratio (V0.1 / V100) of greater than or equal to 25 at 190 <0> C. 10. A second composition according to claim 8 or claim 9, wherein the ethylene / [alpha] -olefin interpolymer is an ethylene / propylene interpolymer. The ethylene / propylene interpolymer has a rheological ratio (V0.
The second composition of claim 12 having 1 / V100). HDPE has an _{I 2} of 1 to 50 g / 10min, a second composition according to any of claims 8 13. HDPE is 30 to 100 P based on the weight of ethylene / α-olefin interpolymer
15. A second composition according to claim 14 present in an amount of HR.   The second composition according to any one of claims 8 to 15, further comprising an oil.   The second composition according to any one of claims 1 to 16, further comprising a filler. The composition according to any one of the preceding claims, having a compression set of less than 70 percent at 70 ° C as measured by ASTM D-395.   The composition according to any one of the preceding claims, which does not contain a vulcanizing agent or vulcanization aid. A product comprising at least one component formed from the composition according to any one of the preceding claims.   The product according to claim 20, having an adhesive strength of 0.012 N or less.