摘要:
Tyres for vehicle wheels having reduced environmental impact and the components thereof, in particular reinforcing structural elements such as carcass structures, belt structures, flippers and chafers, include elongated reinforcing elements treated with resorcinol and formaldehyde-free cross-linkable adhesive compositions. The adhesive compositions include at least a) a rubber latex, at least b) an epoxide and at least c) a polyamine with molecular weight higher than 190 Daltons, including at least two amino groups selected from primary —NH2 and secondary —NH— amino groups. In the structural element, these compositions confer an adhesion between cords and compounds that is comparable to, if not better than, the traditional RFL system in use in this sector. Furthermore, by suitably modifying the compound compositions in the reinforced structural elements and, possibly, also in the other elastomeric components of the tyre, it is possible to manufacture tyres while avoiding the use of toxic chemicals, such, as resorcinol and formaldehyde.
摘要:
The present invention provides a rubber-improving material exhibiting good dispersion properties in a dispersion liquid, and having excellent rubber-improving effects such as rubber strengthening properties. This invention pertains to: a rubber-improving material comprising a cellulose fiber, having at least 50% of cellulose fibers having a fiber length of no more than 450 nm, out of the total number of cellulose fibers; a rubber-improving material dispersion fluid containing said rubber-improving material and a dispersion medium; and a rubber composition containing said rubber-improving material and a rubber component.
摘要:
(i) a water reducible monomer modified alkyd obtained by the acidolysis of a polyalkylene terephthalate or polyalkylene napthanaie and subsequent monomer modification and (ii) a latex having an average particle size greater than 200 nm and (iii) a small particle size latex having an average particle size less than 110 nm.
摘要:
The present invention relates to a starch-based binder for carpet backings and carpets made therewith. The binder comprises water, a polymer and an oligomeric or polymeric starch hydrosylate compound.
摘要:
The present invention is directed to a process of preparing a composite comprising an elastomer and at least partially exfoliated, intercalated water-swellable clay. The process includes: (A) forming a first blend of water-swelled clay and anionic polymer particle emulsion by blending: (1) an aqueous mixture comprised of water and a multilayered water-swellable clay, comprising a plurality of stacked platelets with water-expanded galleries between said platelets; and (2) an elastomer latex comprising an elastomer selected from the group consisting of natural rubber, synthetic polyisoprene, polybutadiene, and styrene-butadiene rubber;
(B) blending with said first blend an aqueous mixture comprised of water and from 1 to 5 percent by weight of a polar polymer selected from the group consisting of hydroxyethylcellulose, carboxymethylcellulose, carboxymethylcellulose sodium salt, starch, modified starch, gelatin, polyvinylalcohol, polyacrylic acid, polyacrylic acid salts, derivatives of polyacrylic acid, and carboxylated rubbers.
摘要:
A latex binder for a pigmented paper coating, the latex including particles of an emulsion copolymer comprising (i) from about 15 to about 35 weight % mer units deriving from the polymerization of acrylonitrile; (ii) from about 25 to about 65 weight % mer units deriving from the polymerization of conjugated diene monomer; and (iii) from about 5 to about 55 weight % mer units deriving from the polymerization of alkenyl aromatic monomer, based upon the total weight of the mer units within the particle.
摘要:
Organic gels of resorcinol-formaldehyde type, carbon-based materials of adjusted porosity derived therefrom by pyrolysis. Such materials may be used, in particular, for the production of electrodes.
摘要:
A dip-formed article that has wearing comfort, excelling in not only tensile strength but also flexing fatigue and that itself does not tend to suffer coloration even when the article is worn and operation is continued; and a dip-forming composition capable of providing such a dip-formed article. There is provided a dip-forming composition comprising a conjugated diene rubber latex and an organic peroxide, wherein providing that X refers to the 10-hr half-life temperature (°C) of organic peroxide and Y refers to the octanol-water partition coefficient of organic peroxide, the organic peroxide satisfies the formulae: 11 ‰¥ Y ‰¥ 2 (1), and 100 - 2Y ‰¥ X ‰¥ 70 - 2Y (2). There is further provided a dip-formed article obtained from the composition.
摘要:
Accelerator composition for a rubber latex derived from a conjugated diene and optionally a vinyl aromatic comonomer comprising: (i) a diethyl dithiocarbamate (like e.g. ZDEC), and (ii) diphenylguanidine (DPG), and substantially free of any thiazole derative, a curable aqueous synthetic rubber latex composition comprising said accelerator composition, and a process for the water-based solvent-free manufacture of synthetic shaped synthetic elastomeric articles, prepared by using said accelerator composition.