摘要:
This invention relates to a novel class of polymeric resins which have a softening point ranging from about 50° C. to about 220° C. and a molecular weight ranging from about 500 to about 42,000. The resins comprise the polymers which result from the polymerization reaction between dimethyl dicyclopentadiene and limonene. The polymeric resins are particularly useful in improving traction of the rubber when used in tire treads.
摘要:
This invention relates to a polymeric resin which contains from 35 to 65 percent by weight of polymeric units derived from dicyclopentadiene and from 65 to 35 percent by weight of polymeric units derived from beta-pinene. The polymeric resins are particularly useful in improving traction of the rubber when used in tire treads.
摘要:
The present invention relates to rubber compositions containing organo-nitriles of the formula: N≡C—R—C≡N (I) wherein R is selected from the group consisting of alkylenes having from 2 to 10 carbon atoms, alkylenes having from 2 to 8 carbon atoms which are substituted with N, O, S, hydroxy, alkoxy having from 1 to 3 carbon atoms or an alkyl having from 1 to 3 carbon atoms, arylenes having from 6 to 10 carbon atoms and alkarylenes having from 7 to 10 carbon atoms.
摘要:
The present invention relates to silica-filled rubber compositions containing dialkyleneamide polysulfides of the formula ##STR1## where R.sup.1 is independently selected from alkylene groups having 1 to 18 carbon atoms and x is an integer of from 2 to 7.
摘要:
A process whereby photograde quality hydroquinone can be separated from the reaction mixture produced by a rearrangement of p-diisopropylbenzene dihydroperoxide, which process comprises the steps of (1) subjecting the mixture to hydrogenation to remove color; (2) concentrating the colorless solution; (3) adding a solvent to the concentrated mixture which dissolves impurities but which causes the hydroquinone to precipitate; and (4) separating the hydroquinone from the supernatant liquid in step (3).
摘要:
This invention discloses a process for manufacturing an elastomeric article by liquid injection molding, said process comprising the steps of: (I) heating a curable composition comprised of (1) a liquid polymer comprised of repeat units that are derived from a conjugated diolefin monomer, wherein said liquid polymer has a weight average molecular weight which is within the range of 5,000 to 100,000, and wherein the liquid polymer is functionalized with an amine moiety, (2) a carbonyl inhibited platinum catalyst, and (3) a tetrakis(dialkyl siloxy) silane crosslinking agent, to a temperature which is within the range of 30° C. to 100° C.; (II) injecting the heated curable composition into a mold at a temperature which is within the range of 100° C. to 210° C. to produce the elastomeric article; and (III) removing the elastomeric article from the mold.
摘要:
The present invention relates to a soft thermoplastic elastomer composition that is free of thermoplastic resin that can be utilized in manufacturing shoe sole inserts, seals, gaskets, wheels, and that can be overmolded on a hard substrate, such as a metal or a thermoplastic resin, for grips or handles on various household items. The present invention more specifically discloses a thermoplastic elastomer composition that is made by a process comprising: (1) mixing (A) a block copolymer comprising a first polymeric block that is comprised of repeat units that are derived from a vinyl aromatic monomer and a second block that is comprised of repeat units that are derived from a conjugated diolefin monomer, wherein the repeat units in the second block are hydrogenated, and wherein the repeat units in the second block are elastomeric in nature, (B) a crosslinkable elastomer, and (C) an oil, to produce an un-crosslinked three component blend; and (2) dynamically crosslinking the crosslinkable elastomer in the un-crosslinked three component blend during a thermo-mechanical mixing step; wherein the thermoplastic elastomer composition is void of thermoplastic resins.
摘要:
The invention relates to articles of manufacture, such as for example, tires and industrial products, which have at least one component comprised of a rubber composition which contains particles of pre-sulfur vulcanized rubber (e.g. ground recycled rubber) and high purity trithiodipropionic acid, wherein said trithiodipropionic acid is preferably provided as particles of a carbon black composite comprised of carbon black and said high purity trithiodipropionic acid. Said high purity trithiodipropionic acid is comprised of polythiodipropionic acids containing at least 80 weight percent trithiodipropionic acid based upon said polythiodipropionic acids.
摘要:
This invention relates to a conjugated diene-based rubber composition reinforced with particulate alumina in combination with a non-silane coupling agent as tetrathiodipropionic acid and/or trithiodipropionic acid. The invention includes an article of manufacture, including a tire, having at least one component comprised of such rubber composition.