High-performance resin for abrasive products

Patent metadata

Field	Value
Publication number	US-9023955-B2
Application number	US-201414329306-A
Country	US
Kind code	B2
Filing date	Jul 11, 2014
Priority date	Jun 29, 2005
Publication date	May 5, 2015
Grant date	May 5, 2015

Abstract

An abrasive product includes a plurality of abrasive particles and a resin cured with a polythiol group. A method of preparing the abrasive product includes contacting the plurality of abrasive particles with a curable composition that includes a resin and a polythiol group, and curing the curable composition to produce the abrasive product. A method of abrading a work surface includes applying an abrasive product to a work surface in an abrading motion to remove a portion of the work surface. A curable composition includes a formaldehyde resin and a polythiol group. A formaldehyde resin is crosslinked by a polythiol group. A method of crosslinking the formaldehyde resin includes reacting the polythiol group with the formaldehyde resin.

First claim

What is claimed is:

1. An abrasive article comprising:
a substrate;
a crosslinked polymer composition deposited on the substrate; and
abrasive particles disposed on or in the crosslinked polymer composition, wherein the crosslinked polymer composition comprises
the reaction product of a resin and a polythiol group, wherein the resin is a phenol formaldehyde resole resin, and wherein the polythiol group is selected from trimethylolpropane tri(3-mercaptopropionate), trimethylolpropane tri(2-mercaptoacetate), pentaerythritol tetra(3-mercaptopropionate), pentaerythritol tetra(2-mercaptoacetate), polyol-3-mercaptopropionates, polyol-2-mercaptoacetates, polyester-3-mercaptopropionates, polyester-2-mercaptoacetates, and ethoxylated trimethylolpropane tri(3-mercaptopropionate).

2. The abrasive article of claim 1 , wherein the polythiol group is pentaerythritol tetra-(3-mercaptopropionate).

3. The abrasive article of claim 1 , further comprising aluminum trihydrate, wollastonite, cryolite or combinations thereof disposed on or in the crosslinked polymer composition.

4. The abrasive article of claim 1 , wherein the polythiol group forms at least 10% by weight of the crosslinked polymer composition.

5. The abrasive article of claim 1 , wherein the polythiol group forms about 10% to about 50% by weight of the crosslinked polymer composition.

6. The abrasive article of claim 1 , wherein the crosslinked polymer composition comprises the reaction product of the resin, the polythiol group, and an epoxy acrylate.

7. The abrasive article of claim 1 , further comprising a colorant.

8. The abrasive article of claim 7 , wherein the colorant is fluorescent red, orange, yellow, or green.

9. The abrasive article of claim 1 , wherein the crosslinked polymer composition transmits more visible light compared to the same crosslinked polymer composition without the polythiol group.

10. The abrasive article of claim 1 , wherein the crosslinked polymer composition has an increased average storage modulus in a temperature range from about −150 degrees C. to 250 degrees C. compared to the same resin without the polythiol group.

11. The abrasive article of claim 1 , wherein the resin has an increased average loss modulus in a temperature range from about −150 degrees C. to 250 degrees C. compared to the same resin without the polythiol group.

12. The abrasive article of claim 1 , wherein the abrasive article has an increased flexibility of at least 5% compared to an otherwise identical abrasive article not cured with a polythiol.

13. The abrasive article of claim 12 , wherein the abrasive article further has increased interfacial adhesion strength of at least 5% compared to an otherwise identical abrasive article not cured with a polythiol.

14. A method of forming an abrasive article comprising:
disposing a curable composition on a substrate;
disposing abrasive particles on or in the curable composition; and
curing the curable composition to form the abrasive article,
wherein the curable composition comprises
a resin and
a polythiol group,

wherein the resin is a phenol formaldehyde resole resin, and wherein the polythiol group is selected from trimethylolpropane tri(3-mercaptopropionate), trimethylolpropane tri(2-mercaptoacetate), pentaerythritol tetra(3-mercaptopropionate), pentaerythritol tetra(2-mercaptoacetate), polyol-3-mercaptopropionates, polyol-2-mercaptoacetates, polyester-3-mercaptopropionates, polyester-2-mercaptoacetates, and ethoxylated trimethylolpropane tri(3-mercaptopropionate).

Assignees

• Saint Gobain Abrasives Inc
• Saint Gobain Abrasifs Sa

Inventors

• Gaeta Anthony C
• Rice William C

Classifications

• C08L61/24

  with urea or thiourea · CPC title

• C08G12/36

  Ureas; Thioureas · CPC title

• C08G8/28

  Chemically modified polycondensates · CPC title

• C09G1/16

  on natural or synthetic resins · CPC title

• C08G12/32

  Melamines · CPC title