Abrasive articles comprising a grinding aid dispersed in a polymeric blend binder

• US 5,507,850 A
• Filed: 05/15/1995
• Issued: 04/16/1996
• Est. Priority Date: 04/19/1993
• Status: Expired due to Term

• Current Assignee: 3M Company
• Original Assignee: 3M Company
• Inventors: Helmin, Harvey J.
• Primary Examiner(s): JONES, DEBORAH D
• Application Number:
  US08/440,708
• Time in Patent Office: 337 Days
• Field of Search: 523/149, 523/158, 524/404, 524/437, 51/298, 51/307
• US Class Current: 51/298
• CPC Class Codes: B24D 3/28 Resins or natural or synthetic macromolecular compounds B24D3/22 takes precedence
• CPC Class Codes: B24D 3/344 the bonding agent being organic

Abstract

Abrasive articles and methods of making and using same are presented, the abrasive articles having a peripheral surface adapted to contact and abrade a workpiece. The abrasive articles comprise abrasives particles and a grinding aid composition positioned at an effective location in reference to the abrasive particles, the grinding aid composition comprising:

a) a cured grinding aid binder comprising a blend of a thermoplastic resin and a thermoset resin, the thermoplastic resin and thermoset resin being present at an effective weight ratio; and

b) an effective amount of a grinding aid dispersed in the grinding aid binder.

Claims

1. A coatable, stable grinding aid precursor composition comprising

(a) a thermoset resin having a thermoplastic resin dispersed therein, said thermoplastic resin and said thermoset resin are present at a weight ratio sufficient to improve at least one of rheological and grinding efficiency effects of the grinding aid composition;

and

(b) a plurality of grinding aid particles dispersed in said thermoset resin;

said grinding aid particles are present in said grinding aid composition in an amount effective to increase grinding efficiency.

2. A grinding aid precursor composition in accordance with claim 1 further comprising a dispersing agent.

3. A grinding aid precursor composition in accordance with claim 2 wherein said dispersing agent comprises sodium dioctyl sulfosuccinate.

4. A grinding aid precursor composition in accordance with claim 1 further comprising a thixotropic agent.

5. A grinding aid precursor composition in accordance with claim 1 further comprising a coupling agent.

6. Grinding aid precursor composition in accordance with claim 1 wherein said weight ratio is at least 0.1:

1.0.

7. Grinding aid precursor composition in accordance with claim 1 wherein said weight ratio is at least 0.3:

1.0.

8. Grinding aid precursor composition in accordance with claim 1 further comprising an organic diluent.

9. A grinding aid precursor composition in accordance with claim 1 further comprising water.

10. A grinding aid precursor composition in accordance with claim 1 wherein said thermosetting resin comprises an epoxy resin and a curing agent for the epoxy resin.

11. A grinding aid precursor composition in accordance with claim 10 wherein said epoxy resin is emulsified.

12. Grinding air precursor composition in accordance with claim 1 wherein said thermoplastic resin comprises low softening point nonpolar materials selected from the group consisting of:

(a) aliphatic hydrocarbons; and

(b) polymerized units of C₇ and C₉ inclusive aromatic monomers.

13. A grinding aid precursor composition in accordance with claim 1 wherein said grinding aid is selected from the group consisting of halide salts, halogenated polymers, and sulfur-containing compounds.

14. A grinding aid precursor composition in accordance with claim 13 wherein said halide salt is selected from the group consisting of KBF₄, cryolite, and ammonium cryolite.

15. A grinding aid in accordance with claim 12 wherein the materials are anionic emulsified thermoplastic resins of (a) and (b).