US4038046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated abrasive bonded with urea-formaldehyde, phenolic resin blends
Assignee: Saint Gobain Abrasives Inc
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Filing: 1975-12-31
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Granted: 1977-07-26
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Expires: 1995-12-31
Abstract
Abstract Abrasive articles containing abrasive grits bonded to a support are made with a resinous bond consisting of urea formaldehyde prepolymer blended with a phenolic A-stage resin and finally cured under basic conditions.
Inventors
- 👤 Stanley J. Supkis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:31
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/005; B24D3/02; B24D3/20; B24D3/28; B24D3/285; B24D3/34; B24D3/342; B24D3/344
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
43 words
An abrasive product comprising abrasive grits bonded to a fibrous backing by a basic cured condensation product of a urea formaldehyde prepolymer and a phenolic prepolymer resin, the ratio of phenolic prepolymer solids to urea formaldehyde prepolymer solids being from 9/1 to 1/9.
Claim 2
Dependent Claim
43 words
An abrasive product comprising abrasive grits bonded to a fibrous backing by a basic cured condensation product of a urea formaldehyde prepolymer and a phenolic prepolymer resin, the ratio of phenolic prepolymer solids to urea formaldehyde prepolymer solids being from 9/1 to 1/9.
Claim 3
Dependent Claim
18 words
An abrasive product as in claim 1 in which the grits are bonded to a nonwoven fibrous backing.
Claim 4
Dependent Claim
50 words
An abrasive product comprising abrasive grits bonded to a fibrous backing by a condensation product of a urea formaldehyde prepolymer and a phenolic prepolymer resin, the ratio of phenolic prepolymer solids to urea formaldehyde prepolymer solids being from 9/1 to 1/9, said condensation product includes a particulate calcium carbonate filler.
Claim 5
Dependent Claim
50 words
An abrasive product comprising abrasive grits bonded to a fibrous backing by a condensation product of a urea formaldehyde prepolymer and a phenolic prepolymer resin, the ratio of phenolic prepolymer solids to urea formaldehyde prepolymer solids being from 9/1 to 1/9, said condensation product includes a particulate calcium carbonate filler.
Claim 6
Dependent Claim
50 words
An abrasive product as in claim 1 in which the abrasive grit size is between 600 and 16, and the ratio of urea formaldehyde to phenolic prepolymer is from 9/1 to 1/9, the larger ratio being present when 600 grit is employed the smaller ratio when 16 grit is employed.
Claim 7
Dependent Claim
20 words
An abrasive product as in claim 1 which includes a size coat of phenolic resin; grits of 50 and coarser.
Claim 8
Dependent Claim
20 words
An abrasive product as in claim 1 which includes a size coat of urea formaldehyde; grits of 80 and finer.
Claim 9
Independent Claim
47 words
A method of making an abrasive product comprising adhering abrasive grits to a fibrous backing by a liquid adhesive which is a mixture of a urea formaldehyde and a phenol formaldehyde prepolymer, said mixture having a pH between 7 and 10, and curing the adhesive by heat.
Claim 10
Independent Claim
47 words
A method of making an abrasive product comprising adhering abrasive grits to a fibrous backing by a liquid adhesive which is a mixture of a urea formaldehyde and a phenol formaldehyde prepolymer, said mixture having a pH between 7 and 10, and curing the adhesive by heat.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |