Process for inducing porosity in an abrasive article
First Claim
1. A process of manufacturing an abrasive article comprising the steps of:
- A) forming an unfired article comprising a polymer resin, a vitreous bond and an abrasive wherein the polymer resin has an elastic modulus greater than about 2.0×
109 Pa, a weight gain due to moisture absorption when measured after exposure to a 90°
C. temperature and 85% relative humidity for 10 hours of less than about 2 wt % and a weight loss on firing in a nitrogen atmosphere at 5°
C. per minute to 550°
C. of greater than about 95 wt %, andB) firing said unfired article thereby decomposing the polymer resin and forming a porous abrasive article.
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Abstract
The invention is a process of manufacturing an abrasive article with the steps of forming an abrasive article in the unfired state comprising an abrasive, a vitreous bond and a polymer resin wherein the polymer resin has an elastic modulus greater than about 2.0×109 Pa, a weight gain due to moisture absorption when measured after exposure to a 90° C. temperature and 85% relative humidity for 10 hours of less than about 2 wt % and a weight loss on firing in a nitrogen atmosphere at 5° C. per minute to 550° C. of greater than about 95 wt %, and firing the abrasive article thereby decomposing the polymer resin and creating pores in the abrasive article. The invention further includes the abrasive article formed in the unfired state by the above process.
115 Citations
18 Claims
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1. A process of manufacturing an abrasive article comprising the steps of:
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A) forming an unfired article comprising a polymer resin, a vitreous bond and an abrasive wherein the polymer resin has an elastic modulus greater than about 2.0×
109 Pa, a weight gain due to moisture absorption when measured after exposure to a 90°
C. temperature and 85% relative humidity for 10 hours of less than about 2 wt % and a weight loss on firing in a nitrogen atmosphere at 5°
C. per minute to 550°
C. of greater than about 95 wt %, andB) firing said unfired article thereby decomposing the polymer resin and forming a porous abrasive article. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An unfired article comprising an abrasive, a vitrified bond and a pore inducing polymer resin wherein the polymer resin has an elastic modulus greater than about 2.0×
- 109 Pa, a weight gain due to moisture absorption when measured after exposure to a 90°
C. temperature and 85% relative humidity for 10 hours of less than about 2 wt % and a weight loss on firing in a nitrogen atmosphere at 5°
C. per minute to 550°
C. of greater than about 95 wt %. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
- 109 Pa, a weight gain due to moisture absorption when measured after exposure to a 90°
Specification