Patent application number | Description | Published |
20090043055 | Polyhydroxy compounds as polymerization quenching agents - A method for quenching an active polymerization mixture, the method comprising introducing a polyhydroxy compound to an active polymerization mixture. | 02-12-2009 |
20090062434 | METHOD OF IMPROVING AFFINITY BETWEEN FILLER AND POLYMERS HAVING A LOW DEGREE OF UNSATURATION - Provided is a composition comprising at least one polymer having a degree of unsaturation of no more than about 50 mol %; a filler selected from the group consisting of carbon black, silica, and mixtures thereof; and a polymeric additive comprising a functional end group reactive with said filler, wherein said polymeric additive has a degree of unsaturation of no more than about 50 mol % and a number average molecular weight between about 1,000 and about 25,000. The composition may optionally contain one or more polymers having a degree of unsaturation of more than 50 mol %. The composition may be particularly useful as a component for a tire. | 03-05-2009 |
20090126845 | SILOXANE MODIFIED ELASTOMERS - The present invention relates to coating compositions for use on the surface of elastomeric articles and materials. The compositions are useful in the manufacture of rubber goods such as tires. | 05-21-2009 |
20110054069 | RUBBER COMPOSITION HAVING IMPROVED CRACK RESISTANCE - Disclosed is a rubber composition which comprises: (a) a first polymer, (b) a second polymer that is different from said first polymer, (c) a filler, (d) a first low molecular weight polymer comprising a block A and a block B, wherein said block A comprises a majority of the same type of mer units that make up a majority of the first polymer and block B comprises a majority of the same type of mer units that make up a majority of the second polymer, and (e) a second low molecular weight polymer comprising at least one functional group, wherein said first and second low molecular weight polymers have number average molecular weights of about 5,000 to about 100,000. Also disclosed is a method of mixing the rubber composition. | 03-03-2011 |
20110237729 | Rubber Composition Having Improved Crack Resistance - A method includes: (a) mixing in a first step a first polymer and a filler, (b) mixing in a second step a second polymer and a polyhydroxy compound, and (c) mixing in a third mixing step the mixtures resulting from steps (a) and (b) and optionally additional filler, wherein said first polymer and second polymer may be the same polymer or different polymers, and wherein steps (a) and (b) can occur simultaneously or consecutively. | 09-29-2011 |
20120077922 | Amino Alkoxy-Modified Silsesquioxane Adhesives For Improved Metal Adhesion And Metal Adhesion Retention To Cured Rubber - Amino alkoxy-modified silsesquioxanes (amino AMS), and/or amino co-AMS compounds that also comprise a mercaptosilane or a blocked mercaptosilane, are excellent adhesives for coating plated or unplated metal wire for adherence of the wire to a rubber stock. The amino AMS and/or the amino/mercaptan co-AMS adhesives can be used with all types of rubber and there is no requirement for the use of special adhesive additives to the rubber vulcanizates, such as, but not limited to, cobalt, resins and high sulfur levels. In particular, the use of amino AMS and/or amino/mercaptan co-AMS compounds as adhesives for bonding wire to rubber also improves the adherence performance of the reinforcements to obtain sufficient bonding that is resistant to degradation over the course of time, especially resistance to thermal aging and/or thermo-oxidizing aging, in particular corrosion in the presence of water. Vulcanized rubber compositions that contain an amino AMS and/or amino/mercaptan co-AMS compound also have improved adhesion to embedded uncoated steel after humidity aging compared with vulcanized rubber compositions not containing the amino alkoxy-modified silsesquioxane. | 03-29-2012 |
20120108736 | RUBBER COMPOSITIONS INCLUDING A POLYMERIC COMPONENT HAVING A MULTI-MODAL MOLECULAR WEIGHT DISTRIBUTION - A vulcanizable composition of matter comprising a rubber component, a filler, a curative for the rubber, where the rubber component includes a multi-modal polymer including at least two distinct peak molecular weights within a range defined by a lower limit of 80 kg/mole and an upper limit of 500 kg/mole. | 05-03-2012 |
20120252979 | Process for Producing Blends of Syndiotactic, 1,2-Polybutadiene and Rubbery Elastomers - Blends of syndiotactic 1,2-polybutadiene and rubbery elastomers are prepared by a process that comprises polymerizing 1,3-butadiene monomer into syndiotactic 1,2-polybutadiene within a rubber cement of an elastomeric terpolymer by using a chromium-based, molybdenum-based, or iron-based catalyst composition. Polymer composition comprising the blend with improved properties is also provided. | 10-04-2012 |
20130172446 | INTERMESHING MIXING OF FILLER AND POLYMER SOLUTION MASTERBATCH - A method includes: mixing a polymer cement and a filler to form a solution masterbatch; optionally drying the solution masterbatch to form a crumb polymer composition; mixing a low viscosity polymeric or oligomeric liquid into the solution masterbatch or crumb polymer composition; and intermeshing mixing the solution masterbatch or crumb polymer composition. | 07-04-2013 |