Abstract:
A rubber compound for tyres comprising a cross-linkable unsaturated chain polymer base comprising, in turn, at least a rubber of synthetic origin, a silica-free filler at least partially comprising carbon black, a vulcanization system and a mercapto carboxylic acid.
Abstract:
A method of making a fluoroelastomer composition includes curing a fluoroelastomer precursor composition under ambient pressure conditions resulting in a fluoroelastomer composition that is substantially free of surface bubbles. The fluoroelastomer precursor composition includes peroxide-curable fluoropolymer, an effective amount of peroxide consisting essentially of bis(2,4-dichlorobenzoyl) peroxide for curing the peroxide-curable fluoropolymer. The fluoroelastomer precursor composition is essentially free of non-fluorinated carbon particles. A method of making composite articles based on the method is also disclosed.
Abstract:
The present invention generally relates to vulcanization compositions used to vulcanize elastomeric articles, where the vulcanization compositions have reduced allergenic potential as compared to elastomeric articles formed using vulcanization compositions having non-fugitive accelerators. The present invention also relates to elastomeric articles formed using the vulcanization compositions. The invention further relates to methods for making a reduced-allergenicity vulcanization composition, and to methods for using the vulcanization compositions to vulcanize elastomeric articles.
Abstract:
A composition containing (I) a natural or synthetic organic polymer having a melt flow index of 15 to 1000 g/10 min at 230° C. and 2.16 kg and (II) an additive mixture containing components (A1) and (A2), wherein (A1) is at least one organic cyclic phosphoric acid ester of the formula (I) wherein R0 is a direct bond, —S—, C3-C12cycloalkylidene or a group —C(X1)(X2)— with X1 and X2 independently of one another being hydrogen, C1-C18alkyl or C3-C12cycloalkyl; and the radicals R1 are identical and are C1-C18alkyl or C3-C12cycloalkyl unsubstituted or substituted by one, two or three C1-C4alkyl; and (A2) is at least one alkali or alkaline earth metal salt of a saturated or unsaturated aliphatic mono or dicarboxylic acid unsubstituted or substituted by —OH; with the proviso that the composition is essentially free of an inorganic or organic pigment.
Abstract:
A tire comprises a rubber composition based on at least one diene elastomer, a reinforcing filler predominantly comprising silica, a crosslinking system, and a primary amine of formula (I): R—NH2 (I), in which R represents a linear or branched hydrocarbon group comprising from 8 to 24 carbon atoms. The rubber composition is essentially devoid of guanidine derivative.
Abstract:
A tire comprises a rubber composition based on at least one diene elastomer, a reinforcing filler predominantly comprising silica, a crosslinking system, and a hydroxyalkylpiperazine of formula (I): in which R1 represents a linear or branched alkyl group comprising from 1 to 18 carbon atoms, R2 represents a linear or branched alkylene group comprising from 1 to 18 carbon atoms, it being understood that R1 and R2 can bear one or more additional hydroxyl groups. The rubber composition is essentially devoid of guanidine derivative.
Abstract:
The present invention relates to new improved adhesives for binding books and related articles and the production of such adhesives. In particular, the adhesives have reduced content of monomeric diisocyanates or no monomeric diisocyanate content.
Abstract:
Disclosed are a halogen-free fire-retardant polyamide composition, and a preparation method and application thereof. The halogen-free fire-retardant polyamide composition is prepared from 35 to 71.5% of a semi-aromatic polyamide, 10 to 35% of a fire retardant and 0 to 50% of an inorganic reinforcing filler, the terminal amino group content of the semi-aromatic polyamide being 80 to 150 mol/t. The halogen-free fire-retardant polyamide composition of the present invention has good heat stability and releases only a small amount of gas in production; mold dirt is not easily formed, and the halogen-free fire-retardant polyamide composition can be produced continuously.
Abstract:
The present invention relates to a composition comprising polystyrene or modified-polystyrene or a mixture thereof, said polystyrene or modified-polystyrene or mixture thereof further comprising carbon nanotubes; wherein the composition comprises a polyolefin; and wherein the composition comprises at most 1.90% by weight of carbon nanotubes, based on the total weight of the composition. The present invention also relates to a method for the preparation of the composition, wherein the carbon nanotubes are provided in polyolefin or styrenic copolymer masterbatch.
Abstract:
The present invention relates to a lead-free, non-toxic and arc resistant composite material having a thermosetting polymer, at least one heavy particulate filler, at least one light particulate filler and, optionally, at least one arc resistant filler. The composite material may be utilized in manufacturing articles used in radiation shielding and other applications where arc resistant and dielectric strength are desired.