US5167674A
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Bismaleimide-triazine resin bonded superabrasive wheels
Assignee: Saint Gobain Abrasives Inc
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Filing: 1992-04-13
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Granted: 1992-12-01
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Expires: 2012-04-13
Abstract
Abstract An improved superabrasive composition for grinding applications comprising a superabrasive material, a bismaleimide-triazine addition copolymer resin which as a cured polymer exhibits (i) a glass transition temperature (Tg) of at least about 280° C. and (ii) a long term thermal resistance of at least about 180° C., a free radical generating initiator, and preferably a catalyst, is disclosed. The superabrasive abrasive composition is particularly useful as a cutting edge in a high performance cutting wheel.
Inventors
- 👤 Prasad V. Ika
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:39
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/04; C; C08; C08G; C08G73/00; C08G73/06; C08G73/0666; C08G73/0672; B24D3/20; B24D3/28; C08G73/0622; C08G73/0638; C08G73/0683; C08G73/0688; C08G73/0694; C08G73/10; C08G73/12; C08G73/128; C09; C09K; C09K3/00; C09K3/14; C09K3/1409; C09K3/1418
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
50 words
An abrasive composition which comprises a superabrasive material, a bismaleimide-triazine addition copolymer resin which as a cured polymer exhibits (i) a glass transition temperature (Tg) of at least about 280° C. and (ii) a long term thermal resistance of at least about 180° C., and a free radical generating initiator.
Claim 2
Dependent Claim
50 words
An abrasive composition which comprises a superabrasive material, a bismaleimide-triazine addition copolymer resin which as a cured polymer exhibits (i) a glass transition temperature (Tg) of at least about 280° C. and (ii) a long term thermal resistance of at least about 180° C., and a free radical generating initiator.
Claim 3
Dependent Claim
20 words
The composition of claim 1, wherein the superabrasive has a Knoop hardness of at least about 3000 kg/mm 2 .
Claim 4
Dependent Claim
24 words
The abrasive composition of claim 1, wherein the superabrasive material is selected from the group consisting of diamond, cubic boron nitride, and mixtures thereof.
Claim 5
Dependent Claim
13 words
The abrasive composition of claim 3, wherein the superabrasive material is metal coated.
Claim 6
Dependent Claim
11 words
The abrasive composition of claim 4, wherein the coating is nickel.
Claim 7
Dependent Claim
11 words
The abrasive composition of claim 3, additionally containing a secondary abrasive.
Claim 8
Dependent Claim
14 words
The abrasive composition of claim 6, wherein the secondary abrasive is a sintered alumina.
Claim 9
Dependent Claim
26 words
The abrasive composition of claim 1, wherein the superabrasive material is present in an amount of from about 5 to 40% by volume of he composition.
Claim 10
Dependent Claim
26 words
The abrasive composition of claim 1, wherein the bismaleimide-triazine resin is present in an amount of from about 35 to 60% by volume of the composition.
Claim 11
Dependent Claim
23 words
The abrasive composition of claim 9, wherein the bismaleimide-triazine resin is present in an amount of from about 45 to 55% by volume.
Claim 12
Dependent Claim
20 words
The abrasive composition of claim 1, wherein the initiator is selected from the group consisting of peroxide and azo initiators.
Claim 13
Dependent Claim
18 words
The abrasive composition of claim 10, wherein the peroxide is selected from the group consisting o dicumyl peroxide.
Claim 14
Dependent Claim
20 words
The abrasive composition of claim 1, wherein the composition further includes a catalyst for accelerating the curing of the resin.
Claim 15
Dependent Claim
26 words
The abrasive composition of claim 13, wherein the catalyst is selected from the group consisting of an organic metal salt, an amine, or a combination thereof.
Claim 16
Dependent Claim
26 words
The abrasive composition of claim 14, wherein the catalyst is an organic metal salt selected from the group consisting of zinc octoate and ferric acetyl acetonate.
Claim 17
Dependent Claim
22 words
The abrasive composition of claim 14, wherein the catalyst is an amine selected from the group consisting of triethylene diamine, and N,N-dimethylbenzylamine.
Claim 18
Dependent Claim
11 words
The abrasive composition of claim 1, additionally containing a filler material.
Claim 19
Dependent Claim
24 words
The abrasive composition of claim 16, wherein the filler material is selected from the group consisting of polytetrafluoroethylene, silicon carbide, graphite, and molybdenum disulphide.
Claim 20
Dependent Claim
26 words
The abrasive composition of claim 17, wherein the filler material is present in an amount of from about 20 to 40% by volume of the composition.
Claim 21
Dependent Claim
14 words
The abrasive composition of claim 17 wherein the filler material is a secondary abrasive.
Claim 22
Dependent Claim
14 words
The abrasive composition of claim 20, wherein the secondary abrasive is a sintered alumina.
Claim 23
Dependent Claim
13 words
The abrasive composition of claim 1, additionally containing a material for absorbing water.
Claim 24
Dependent Claim
12 words
The abrasive composition of claim 22, wherein the water-absorbing material is lime.
Claim 25
Dependent Claim
25 words
The abrasive composition of claim 23, wherein the lime is present in an amount of from about 1 to 5% by volume of the composition.
Claim 26
Dependent Claim
32 words
An abrasive composition comprising a superabrasive selected from either diamond or cubic boron nitride, a bismaleimide-triazine addition copolymer resin, a free-radical generating initiator, a catalyst for curing said resin, and a filler.
Claim 27
Dependent Claim
32 words
An abrasive composition comprising a superabrasive selected from either diamond or cubic boron nitride, a bismaleimide-triazine addition copolymer resin, a free-radical generating initiator, a catalyst for curing said resin, and a filler.
Claim 28
Dependent Claim
94 words
The abrasive composition of claim 25, wherein the superabrasive material is present in an amount of from about 5 to 40% by volume of the composition, the bismaleimide-triazine resin is present in an amount of from about 35 to 60% by volume, the initiator is present in an amount of from about 0.01 to 1% by weight of the resin, the catalyst is present in an amount of about 0.01 to 1% by weight of the resin, and the filler is present in an amount of from about 20 to 40 % by volume.
Claim 29
Dependent Claim
70 words
The abrasive composition of claim 25, wherein the superabrasive material is present in an amount of from about 10 to 25% by volume of the composition, the bismaleimide-triazine resin is present in an amount of from about 45 to 55% by volume, the initiator is a peroxide, the catalyst is an organic metal salt, and the filler is present in an amount of from about 25 to 35% by volume.
Claim 30
Dependent Claim
27 words
A cutting wheel having an inner core section and an outer annular cutting edge section, said cutting edge being composed of the abrasive composition of claim 1.
Claim 31
Dependent Claim
28 words
A cutting wheel having an inner core portion and an outer annular cutting edge portion, said cutting edge portion being composed of the abrasive composition of claim 25.
Claim 32
Dependent Claim
26 words
A grinding wheel having an inner core section and an outer annular grinding section, said grinding section being composed of the abrasive composition of claim 1.
Claim 33
Dependent Claim
26 words
A grinding wheel having an inner core portion and an outer annular grinding section, said grinding section being composed of the abrasive composition of claim 25.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-12-01 | 1996-06-01 | 1996-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-01 | 2000-06-01 | 2000-12-01 | $3760.00 | Window Closed / Lapsed |
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