Patent US1706097A successfully refreshed from Google Patents.
US4239503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soft acting phenol-formaldehyde resin bonded grinding wheel
Assignee: Saint Gobain Abrasives Inc
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Filing: 1976-05-21
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Granted: 1980-12-16
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Expires: 1996-05-21
Abstract
Abstract The invention is a phenol-formaldehyde resin bonded grinding wheel which has grinding characteristics like that of shellac bonded grinding wheels. This soft, mild grinding action results from the basic phenol-formaldehyde resin initially containing from 0.5 to 2.5% by weight of hexamethylenetetramine, when used in conjunction with a material such as liquid one-stage phenol-formaldehyde resin, or furfural as the bond pick-up agent.
Inventors
- 👤 Denis I. Harris
- 👤 Luke Staples
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:03
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/20; B24D3/28; B24D3/285
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
98 words
A bonded abrasive product comprising abrasive grain and a thermoset polymeric bond, wherein the improvement comprises: A thermoset polymeric bond based on the reaction product of a phenol and an aldehyde in a molar ratio of said phenol to said aldehyde of greater than 1, and wherein said reaction product is cured by a methylene group donor, said donor being present in sufficient quantity so as to provide from 0.3 to less than 1.2% by weight of methylene groups, based on the weight of said methylene group donor and said reaction product of said phenol and said aldehyde.
Claim 2
Dependent Claim
98 words
A bonded abrasive product comprising abrasive grain and a thermoset polymeric bond, wherein the improvement comprises: A thermoset polymeric bond based on the reaction product of a phenol and an aldehyde in a molar ratio of said phenol to said aldehyde of greater than 1, and wherein said reaction product is cured by a methylene group donor, said donor being present in sufficient quantity so as to provide from 0.3 to less than 1.2% by weight of methylene groups, based on the weight of said methylene group donor and said reaction product of said phenol and said aldehyde.
Claim 3
Dependent Claim
31 words
The abrasive product of claim 1 wherein said methylene group donor is one selected from the group consisting of hexamethylenetetramine, an aldehyde, trimethylol phenol, one stage phenol-aldehyde resin, and mixtures thereof.
Claim 4
Dependent Claim
35 words
The abrasive product of claim 2 including a reactive liquid pick-up agent for said bond, the liquid pick-up agent being selected from the group consisting of furfuraldehyde, liquid one stage phenol-formaldehyde resin, and mixtures thereof.
Claim 5
Dependent Claim
75 words
An abrasive product comprising abrasive grain, a reactive liquid bond pick-up agent, and a thermoset polymeric bond, wherein the improvement comprises: a thermoset polymeric bond based on the reaction product of phenol and an aldehyde in a molar ratio of phenol to aldehyde greater than 1, and wherein said reaction product is cured with an amount of hexamethylenetetramine of from 0.5 to less than 2% of the combined weight of hexamethylenetetramine and phenol-aldehyde reaction product.
Claim 6
Dependent Claim
75 words
An abrasive product comprising abrasive grain, a reactive liquid bond pick-up agent, and a thermoset polymeric bond, wherein the improvement comprises: a thermoset polymeric bond based on the reaction product of phenol and an aldehyde in a molar ratio of phenol to aldehyde greater than 1, and wherein said reaction product is cured with an amount of hexamethylenetetramine of from 0.5 to less than 2% of the combined weight of hexamethylenetetramine and phenol-aldehyde reaction product.
Claim 7
Dependent Claim
39 words
The abrasive product of claim 4 wherein said bond pick-up agent is a liquid phenol-aldehyde resin based on the reaction product of phenol and an aldehyde in a molar ratio of aldehyde to phenol equal to at least 1.
Claim 8
Dependent Claim
14 words
The abrasive product of claim 4 wherein said bond pick-up agent is an aldehyde.
Claim 9
Dependent Claim
20 words
The abrasive product of claim 4 wherein said thermoset polymeric bond includes from 0% to 30% by weight or filler.
Claim 10
Dependent Claim
119 words
An abrasive product consisting essentially of from 44 to 60% by volume of abrasive, 2 to 56% by volume of bond, and 0 to 38% by volume of pores; said bond including 5 to 30% by weight of a liquid bond pick-up agent, 0 to 30% by weight of filler 40 to 90% by weight of a thermoset polymeric bond, wherein the improvement comprises: a thermoset polymeric bond based on the reaction product of a phenol and formaldehyde in a molar ration of said phenol to said formaldehyde greater than 1, and wherein said reaction product is cured with from 1 to less than 2% hexamethylenetetramine, based on the combined weight of said phenol-formaldehyde reaction product and said hexamethylenetetramine.
Claim 11
Dependent Claim
119 words
An abrasive product consisting essentially of from 44 to 60% by volume of abrasive, 2 to 56% by volume of bond, and 0 to 38% by volume of pores; said bond including 5 to 30% by weight of a liquid bond pick-up agent, 0 to 30% by weight of filler 40 to 90% by weight of a thermoset polymeric bond, wherein the improvement comprises: a thermoset polymeric bond based on the reaction product of a phenol and formaldehyde in a molar ration of said phenol to said formaldehyde greater than 1, and wherein said reaction product is cured with from 1 to less than 2% hexamethylenetetramine, based on the combined weight of said phenol-formaldehyde reaction product and said hexamethylenetetramine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |