Grafted near-gelation polymers having high damping properties
First Claim
1. A thermoplastic elastomer comprising a multi-block polymer including hard segments and soft segments, said hard segments comprising polymeric chains of a crystalline polyalkylene and said soft segments comprising a near gelation polymer, wherein said hard segments and said soft segments are connected via covalent bonds, said near-gelation polymer having at least one functional group capable of being linked to a functional group on the polyalkylene and being the reaction product of a prepolymer and a crosslinking agent, said near-gelation polymer having a physical state relative to its gelation point defined by 0≦
- |(r−
rg)/rg|≦
0.5 where r is the weight ratio of said crosslinking agent to said prepolymer and rg is the weight ratio of said crosslinking agent to said prepolymer at the gelation point.
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Accused Products
Abstract
Thermoplastic elastomers containing hard segments formed from polyalkylenes and soft segments formed from elastomeric polymers near their gelation point are formed. Compositions containing these materials are elastomeric and exhibit excellent damping capabilities over a wide range of temperatures and frequencies.
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Citations
19 Claims
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1. A thermoplastic elastomer comprising a multi-block polymer including hard segments and soft segments, said hard segments comprising polymeric chains of a crystalline polyalkylene and said soft segments comprising a near gelation polymer, wherein said hard segments and said soft segments are connected via covalent bonds, said near-gelation polymer having at least one functional group capable of being linked to a functional group on the polyalkylene and being the reaction product of a prepolymer and a crosslinking agent, said near-gelation polymer having a physical state relative to its gelation point defined by 0≦
- |(r−
rg)/rg|≦
0.5 where r is the weight ratio of said crosslinking agent to said prepolymer and rg is the weight ratio of said crosslinking agent to said prepolymer at the gelation point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A thermoplastic elastomer made by reacting a near-gelation saturated polymer with a crystalline polyalkylene for a time sufficient to form said elastomer, said near gelation saturated polymer having at least one functional group capable of being linked with at least one functional group on the crystalline polyalkylene, said near gelation saturated polymer being the reaction product of a prepolymer and a crosslinking agent and having a physical state relative to its gelation point defined by 0≦
- |(r−
rg)/rg|≦
0.5 where r is the weight ratio of said crosslinking agent to said prepolymer and rg is the weight ratio of said crosslinking agent to said prepolymer at the gelation point.
- |(r−
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17. A method of making a thermoplastic elastomer comprising:
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a) subjecting a composition comprising a liquid, crosslinkable polymer having low or no unsaturation to the action of a crosslinking agent so as to form a near-gelation elastomer, said near-gelation elastomer having a physical state relative to its gelation point defined by 0≦
|(r−
rg)/rg|≦
0.5, in which r is the weight ratio of the crosslinking agent to the crosslinkable polymer, and rg is the weight ratio of the crosslinking agent to the crosslinkable polymer at the gelation point; and
b) allowing a covalent bond to form between at least one functional group on each of said near-gelation elastomer and a crystalline polyalkylene.
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18. A method of making a thermoplastic elastomer comprising:
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a) crosslinking a polymer whose gelation point is known with a crosslinking agent, the crosslinking agent being added in sufficient amount to form a near-gelation polymer, said near-gelation polymer having a physical state relative to the gelation point defined by 0≦
|(r−
rg)/rg|≦
0.5, in which r is the weight ratio of the crosslinking agent to polymer, and rg is the weight ratio of the crosslinking agent to the polymer at the gelation point; and
b) linking the near-gelation polymer to a crystalline polyalkylene via at least one functional group on the near-gelation polymer and at least one functional group on the crystalline polyalkylene to form the thermoplastic elastomer. - View Dependent Claims (19)
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Specification