초록

A process of using compositions comprising certain thermoplastic elastomeric polymers for damping and damping compositions comprising soft thermoset polymer containing microscopically discrete segments of said thermoplastic elastomeric polymers.

대표청구항 ▼

A composition useful for damping purposes comprising: (a) crosslinked elastomer containing microscopically discrete segments of (b) multi-phase thermoplastic elastomeric polymer having at least two polymeric phases comprising: (1) an initial linear or lightly crosslinked polymeric phase polymerized

A composition useful for damping purposes comprising: (a) crosslinked elastomer containing microscopically discrete segments of (b) multi-phase thermoplastic elastomeric polymer having at least two polymeric phases comprising: (1) an initial linear or lightly crosslinked polymeric phase polymerized from an alpha, beta-unsaturated monomer, wherein said alpha,beta-ethylenically unsaturated monomer comprises from 0 to about two percent by weight of multi-ethylenically unsaturated monomer, (2) a second polymeric phase in the form of discrete domains of about 2 to about 50 nanometers in diameter dispersed within said initial polymeric phase, wherein said second polymeric phase is polymerized from at least one ethylenically unsaturated monomer comprised of about 5 percent to 100 percent by weight multifunctional monomer having at least two sites of ethylenic unsaturation, wherein the weight ratio of said second polymeric phase to said initial polymeric phase plus said second polymeric phase is from about 1:100 to about 1:2. A process for damping comprising: (a) blending (i) a crosslinkable elastomer; (ii) a multi-phase thermoplastic elastomeric polymer having at least two polymeric phases comprising: (1) an initial linear or lightly crosslinked polymeric phase polymerized from an alpha,beta-ethylenically unsaturated monomer wherein said alpha,beta-ethylenically unsaturated monomer comprises from 0 to about two percent by weight of multi-ethylenically unsaturated monomer, (2) a second polymeric phase in the form of discrete domains of about 2 to about 50 nanometers in diameter dispersed within said initial polymeric phase, wherein said second polymeric phase is polymerized from at least one ethylenically unsaturated monomer comprised of about 5 percent to 100 percent by weight multifunctional monomer having at least two sites of ethylenic unsaturation, wherein the weight ratio of said second polymeric phase to said initial polymeric phase plus said second polymeric phase is from about 1:100 to about 1:2; (iii) at least one curative and optionally one or more reinforcing particulate fillers, wherein the ratio of said optional reinforcing particulate filler to said crosslinkable elastomer plus said multi-phase polymer plus said reinforcing particulate filler is up to about 1:2.5; (b) molding said resultant blend; (c) curing said blend to form a crosslinked elastomer containing microscopically discrete segments of said multi-phase polymer, (d) placing said cured molded blend between two surfaces, at least one of which is subject to vibrations, and damping said vibrations.