US 7,008,312 B2Granted

Using aqueous binders in producing abrasive materials

AssigneeBASF SE

InventorsMatthias Laubender, Matthias Gerst, Bernd Reck, Manfred Weber

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Abstract

The present invention relates to the use of an aqueous polymer dispersion comprising dispersed particles of at least one polymer A1 having a glass transition temperature, Tg, of from −20° C. to +35° C. and obtainable through free-radical emulsion polymerization in the presence of a polymer A2 synthesized from from 50 to 99.5% by weight of at least one ethylenically unsaturated monocarboxylic and/or dicarboxylic acid whose carboxylic groups can form an anhydride group, or mixtures thereof, from 0.5 to 50% by weight of at least one ethylenically unsaturated compound selected from the esters of ethylenically unsaturated monocarboxylic acids and the monoesters and diesters of ethylenically unsaturated dicarboxylic acids with an amine containing at least one hydroxyl group, and up to 20% by weight of at least one further monomer as binder for producing abrasive material.

Claims25

Dependent claims

A method, comprising:

mixing an aqueous polymer dispersion and an abrasive grit to form a grit mixture, then
drying the grit mixture to form an abrasive material,
wherein the aqueous polymer dispersion comprises dispersed particles of at least one polymer A1 having a glass transition temperature Tg of from −20° C. to +35° C. and obtained by free-radical emulsion polymerization in the presence of a polymer A2, wherein the polymer A2 comprises polymerized units of
from 50 to 99.5% by weight of at least one of an ethylenically unsaturated monocarboxylic acid and an ethylenically unsaturated dicarboxylic acid whose carboxylic groups can form an anhydride group, or mixtures thereof,
from 0.5 to 50% by weight of at least one ethylenically unsaturated compound selected from the group consisting of an ester of an ethylenically unsaturated monocarboxylic acid, a monoester of an ethylenically unsaturated dicarboxylic acid and a diester of an ethylenically unsaturated dicarboxylic acid with an amine containing at least one hydroxyl group, and
up to 20% by weight of at least one further monomer.

3 more elements

An abrasive material, comprising:

a dried mixture comprising an abrasive grit and an aqueous polymer dispersion comprising dispersed particles of at least one polymer A1 having a glass transition temperature Tg of from −20° C. to +35° C. and obtained by free-radical emulsion polymerization in the presence of a polymer A2 comprising polymerized units of
from 50 to 99.5% by weight of at least one of an ethylenically unsaturated monocarboxylic acid and an ethylenically unsaturated dicarboxylic acid whose carboxylic groups can form an anhydride group, or mixtures thereof,
from 0.5 to 50% by weight of at least one ethylenically unsaturated compound selected from the group consisting of an ester of an ethylenically unsaturated monocarboxylic acid, a monoester of an ethylenically unsaturated dicarboxylic acid and a diester of an ethylenically unsaturated dicarboxylic acid with an amine containing at least one hydroxyl group, and
up to 20% by weight of at least one further monomer.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 10/759,240Filed 20 Jan 2004
Priority: DE 103 04 9586 Feb 2003
Published: US 2004/0236008 A125 Nov 2004
Granted: 7 Mar 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

C08F 267/04
Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated polycarboxylic acids or derivatives thereof as defined…
C08F 265/02
Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined…
C09J 133/02
Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one…: homopolymers…
C08L 25/14
Copolymers of styrene: with unsaturated esters