The invention discloses a wear-resistant material for impellers and a preparation method thereof. The main point of the technical scheme is that the wear-resistant material for the impellers comprisesthe following components in parts by weight: 60-70 parts of thermoplastic polyurethane elastomer TPU, 30-40 parts of thermoplastic polyester elastomer TPEE, 10-15 parts of modified aramid fiber, 5-10parts of a filler, 0.3-0.5 part of a lubricant and 0.5-1 part of an antioxidant. The product prepared by using the TPU, TPEE and modified aramid fiber as main materials has excellent wear resistanceand oil resistance, and the TPEE has excellent fatigue resistance, less hysteresis loss and less heat generation deformation, and is suitable for use in the environment of burning oil and machine oil.

Wear-resistant material for impellers and preparation method thereof

This invention relates to a rubber composition comprised of at least one diene-based elastomer and rubber reinforcement comprised of fibrillated aramid fiber micropulp and reinforcing filler comprised of pre-hydrophobated precipitated silica Such fibrillated aramid micropulp is comprised of micronized fibrillated aramid fiber pulp Such pre-hydrophobated precipitated silica is comprised of precipitated silica pre-treated with at least one of bis(3-trialkylsilylalkyl) polysulfide, alkoxyorganomercaptosilane, optionally together with an alkylsilane The invention further relates to such rubber composition wherein said reinforcing filler is comprised of a combination of said pre-hydrophobated precipitated silica as a precipitated silica pre-treated with an alkoxyorganomercaptosilane and a precipitated silica wherein said pre-hydrophobated precipitated silica and said precipitated silica are both hydrophobated in situ within the rubber composition with a bis(3-trialkoxysilylalkyl) polysulfide The invention further relates to tires containing at least one component comprised of such rubber composition such as for example a tire tread

Rubber composition containing fibrillated aramid fiber micropulp with pre-hydrophobated silica reinforcement and tire with component

A method of manufacturing a rubber composition is disclosed. The method comprises: (A) forming a dispersion of hydrophobated silica in a rubber composition containing at least one diene-based elastomer by steps of: (1) blending a pre-hydrophobated silica/fatty acid composite with a rubber composition containing at least one diene-based elastomer to form a dispersion of the composite in the rubber composition; (2) blending zinc oxide with the rubber composition containing the composite dispersion; (3) reacting the zinc oxide with the fatty acid of the composite in the rubber composition to thereby substantially convert the fatty acid of the composite to a zinc salt thereof in situ within the rubber composition and to thereby substantially remove the fatty acid from the composite to yield a substantially fatty acid-free hydrophobated silica within the rubber composition, and/or substantially displacing the fatty acid of the composite of pre-hydrophobated silica directly without reacting with the fatty acid and to thereby expose thiol or polysulfide groups of the composite to aid in coupling the composite to at least one diene-based elastomer in the rubber composition; and (B) coupling the substantially fatty acid-free hydrophobated silica to the diene-based elastomer(s) in situ within the rubber composition.

Preparation of silica reinforced rubber composition, rubber composition and tire with component

A rubber composition is disclosed comprising:(A) at least one conjugated diene-based elastomer, and(B) a filler reinforcement for said rubber composition comprising a combination of silica and carbon black,wherein at least one of said conjugated diene-based elastomers is an end-chain multi-functionalized elastomer comprising a diene-based elastomer end-chain functionalized with at least one multi-functional group comprising at least one of:(1) alkoxyorganosilane polysulfide of the general formula (I):         (I)     (R1O)3-Si-R2-Sx-R2-Si-(OR1)3wherein R1represents the same or different aliphatic hydrocarbon radicals containing from 1 to 12 carbon atoms, R2represents an aliphatic hydrocarbon containing from 1 to 8 carbon atoms and x represents a value of from 1 to and including 8; and(2) alkoxyorganosilane of the general formula (II):         (II)     (R1O)3-Si-R3wherein R1represents the same or different aliphatic hydrocarbon radicals containing from 1 to 12 carbon atoms, and R3represents an unsaturated hydrocarbon containing from 2 to 100 carbon atoms; andwherein said multi-functional groups are exclusive of alkoxyorganomercaptosilanes and alkoxyaminosilanes.

Hahn Bruce Raymond

Papers

Rubber composition containing fibrillated aramid fiber micropulp with pre-hydrophobated silica reinforcement and tire with component

Preparation of silica reinforced rubber composition, rubber composition and tire with component

Silica reinforced rubber composition containing a multifunctional group functionalized elastomer and tire with tread