摘要:
A fixed abrasive article having a body including abrasive particles contained within a bond material, the abrasive particles including shaped abrasive particles or elongated abrasive particles having an aspect ratio of length:width of at least 1.1:1, each of the shaped abrasive particles or elongated abrasive particles having a predetermined position or a predetermined three-axis orientation, including a placement angle ranging from +90 degrees to −90 degrees and a rake angle ranging from +90 degrees to −90 degrees.
摘要:
The present invention provides process for the manufacture of an aqueous resin composition comprising a phenolic formaldehyde (PF) resin, which process comprises the steps of: providing a formaldehyde and phenolic compound, reacting said compounds in a condensation reaction in the presence of a catalyst, after completion of the condensation reaction to react with free formaldehyde, determining the free formaldehyde content of the resin composition, adding a pre-calculated substantially stoichiometric amount of modifying compound containing a primary amine group to reduce the amount of free formaldehyde in the resin composition to less than 0.1 wt % (relative to the total weight of the aqueous resin composition), and optionally distillation of the reaction product.
摘要:
Sluuries and binder precursor dispersions suitable for use in producing abrasive articles are presented. Slurries comprise a polymerizable resin which is preferably addition polymerizable, abrasive particles, and modifying particles, wherein the modifying particles are present in an amount sufficient to reduce the viscosity of the slurry. Abrasive articles incorporating cured versions of the slurries and dispersions are presented, as well as methods of making the articles and of reducing sedimentation rate of mineral particles (abrasive or filler).
摘要:
A binder precursor dispersion suitable for use in producing abrasive articles, the dispersion consisting essentially of a polymerizable resin, filler particles, and modifying particles, wherein the modifying particles are present in an amount sufficient to reduce the viscosity of the same binder precursor dispersion; a method of making a coated abrasive comprising the steps of (a) coating a backing material with a slurry, the slurry consisting essentially of a polymerizable resin, abrasive particles, and modifying particles, wherein said modifying particles are present in an amount sufficient to reduce the viscosity of the same slurry; (b) subjecting the coated backing of step (a) to conditions sufficient to cure the polymerizable resin; and a method of reducing a sedimentation rate of mineral particles by adding the modifying particles.
摘要:
Slurries and binder precursor dispersions suitable for use in producing abrasive articles are presented. slurries comprise a polymerizable resin which is preferably addition polymerizable, abrasive particles, and modifying particles, wherein the modifying particles are present in an amount sufficient to reduce the viscosity of the slurry. Abrasive articles incorporating cured versions of the slurries and dispersions are presented, as well as methods of making the articles and of reducing sedimentation rate of mineral particles (abrasive or filler).
摘要:
Sluuries and binder precursor dispersions suitable for use in producing abrasive articles are presented. Slurries comprise a polymerizable resin which is preferably addition polymerizable, abrasive particles, and modifying particles, wherein the modifying particles are present in an amount sufficient to reduce the viscosity of the slurry. Abrasive articles incorporating cured versions of the slurries and dispersions are presented, as well as methods of making the articles and of reducing sedimentation rate of mineral particles (abrasive or filler).
摘要:
Abrasive material is provided in which a relatively thick, flexible, porous, abrasive layer is secured adhesively to a flexible backing member. In the manufacture of the abrasive material, abrasive grain is first coated with a liquid resinous binder composition after which the coated grain is then mixed with a solid, particulate, resinous binder composition, the latter binder being more resistant, after curing, to distortion when subjected to heat and pressure. The thus-formed free-flowing abrasive mixture is then coated continuously onto a flexible backing member. Afterwards, the layer of abrasive mixture is heated to cause fusion of the solid binder at the interface with the liquid binder. It is then compacted into a relatively dense abrasive layer, and is wound up into a jumbo roll in which condition the abrasive layer is subjected to further heat to cure the binder material.