Abstract

The present invention relates to a thermally curable liquid resin composition capable of being used in the manufacture of abrasive articles, and to the resulting abrasive articles.

IPC Classes  ?

• B24D 3/28 - Resins
• B32B 27/04 - Layered products essentially comprising synthetic resin as impregnant, bonding, or embedding substance
• B32B 27/38 - Layered products essentially comprising synthetic resin comprising epoxy resins
• C08G 59/22 - Di-epoxy compounds
• C08G 59/32 - Epoxy compounds containing three or more epoxy groups
• C08G 59/68 - Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups characterised by the catalysts used
• C09D 163/02 - Polyglycidyl ethers of bis-phenols
• C09D 163/04 - Epoxynovolacs

Abstract

An abrasive article which is made from a liquid resin composition containing no formaldehyde, which replaces the resol or urea-formaldehyde resin used as an adhesive in coated abrasives and the resol used as an impregnation resin in bonded abrasives. The liquid resin composition comprises a product that results from the oxidative cleavage of an unsaturated plant or animal oil, chosen from aldehydes, peroxides and mixtures of these compounds. The liquid resin composition can be used for the manufacture of coated and bonded abrasive articles.

IPC Classes  ?

• B24D 11/00 - Constructional features of flexible abrasive materialsSpecial features in the manufacture of such materials

Abstract

The invention relates to a liquid resin composition intended for manufacturing abrasives that comprises at least one novolac resin having a glass transition temperature less than or equal to 60° C., at least one reactive diluent and optionally at least one crosslinking agent. Application of the resin composition for producing abrasive articles, especially bonded abrasives and coated abrasives. It also relates to the abrasive articles comprising abrasive grains connected by such a liquid resin composition.

IPC Classes  ?

• B24D 3/28 - Resins
• C09D 161/10 - Phenol-formaldehyde condensates
• C08L 61/10 - Phenol-formaldehyde condensates

Abstract

The invention relates to an abrasive article made from a liquid resin composition that does not contain formaldehyde, which replaces the resol or the urea-formaldehyde resin used as an adhesive in applied abrasives and the resol used as an impregnation resin in agglomerated abrasives. The liquid resin composition is characterised in that it includes a product resulting from the oxidative cleavage of an unsaturated vegetable or animal oil selected from among aldehydes, peroxides and mixtures of said compounds. The invention also relates to the use of the aforementioned liquid resin composition for the production of agglomerated and applied abrasive articles.

IPC Classes  ?

• C08L 61/00 - Compositions of condensation polymers of aldehydes or ketonesCompositions of derivatives of such polymers
• C08L 97/02 - Lignocellulosic material, e.g. wood, straw or bagasse
• C08L 91/00 - Compositions of oils, fats or waxesCompositions of derivatives thereof
• B24D 3/28 - Resins

Abstract

The invention relates to a liquid resin composition intended for the production of abrasives, containing at least one novolac resin having a glass transition temperature of less than or equal to 60°C, at least one diluting reagent and optionally at least one crosslinking agent. The resin composition can be used to produce abrasive articles, such as bonded abrasives and coated abrasives. The invention also relates to abrasive articles including abrasive grains bonded by one such liquid resin composition.

IPC Classes  ?

• C08L 61/06 - Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
• B24D 3/28 - Resins
• B24D 3/34 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special natureAbrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
• B24D 7/00 - Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front faceBushings or mountings therefor

Abstract

The invention relates to a liquid resin composition capable of thermal crosslinking and intended for the production of abrasives, containing at least one epoxy resin including at least two epoxy groups and at least one diluting reagent, said composition having a viscosity at 25°C of less than or equal to 7000 mPa.s. The resin composition can be used to produce abrasive articles, such as bonded abrasives and coated abrasives. The invention also relates to abrasive articles including abrasive grains bonded by one such liquid resin composition.

IPC Classes  ?

• B24D 3/00 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special natureAbrasive bodies or sheets characterised by their constituents
• C08J 5/00 - Manufacture of articles or shaped materials containing macromolecular substances

Abstract

Pulp production techniques are disclosed. In one embodiment, pulpstone segments are provided, that include proppant grits in the place of some or all of the conventional abrasive typically used in pulpstone applications. The proppant or proppant-abrasive mixture can be combined into a three-dimensional matrix supported by a vitrified bond. Alternative embodiments use proppant grits in an organic bond or a metal bond or a cement bond (each of which may also include abrasive grits in addition to proppant grits). The proportion of proppant grits to abrasive grits can be varied to produce pulp of varying fiber length distribution as required by the end-user (e.g., paper mill). The greater the proppant concentration, the less cutting of the fibers by the conventional abrasive will occur, producing a greater percentage content of longer fibers. Such pulp produces higher quality paper.

IPC Classes  ?

• B24D 5/06 - Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their peripheryBushings or mountings therefor with inserted abrasive blocks, e.g. segmental
• C09K 3/14 - Anti-slip materialsAbrasives
• D21B 1/06 - Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods

Abstract

The invention relates to a fettling, optionally sawing, wheel (1), in the form of a disk, said wheel comprising a central axis X, a central attaching region F, and at least one peripheral working region Z which extends outside the central fixing region in relation to the central axis, said wheel comprising at least one layer (3, 5) formed from abrasive grains and two layers which do not contain any abrasive grains (2, 6) surrounding the wheel. The inventive wheel is characterised in that the working region Z has a total thickness of less than 4 mm and preferably less than or equal to 3.2 mm.

IPC Classes  ?

• B24D 13/08 - Wheels having flexibly-acting working parts, e.g. buffing wheelsMountings therefor acting by their periphery comprising annular or circular sheets packed side by side