US3820290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the rapid cure of condensation polymers and products resulting therefrom
Assignee: Saint Gobain Abrasives Inc
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Filing: 1970-10-07
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Granted: 1974-06-28
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Expires: 1990-10-07
Abstract
Abstract Condensation polymers which generate by-products containing hydroxyl or amine radicals are cured rapidly and essentially free of voids and other defects generally resulting from such usually volatile by-products. This improvement is such cured condensation polymers is facilitated by incorporation therein of specified amounts of a non-cross linked polymeric organic acid anhydride which reacts with the hydroxyl or amine containing condensation by-product and likely with the condensation polymer itself, without any significant deleterious side effects such as plasticization or a reduction in the thermal resistivity of the cured condensation polymer.
Inventors
- 👤 L Erikson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:23
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; C08L; C08L87/00; C08L97/00; C08J2387/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
57 words
The method according to claim 1 wherein said filler is a material selected from the group consisting of asbestos, woodflour, chopped fibers, cloth, carbon, silicon carbide, aluminum oxide, aluminum oxide-zirconium oxide, diamond, boron nitride, silica, magnesia spinel-zirconia, magnesia spinel, aluminum, copper, iron, potassium fluoro borate, sodium fluoro aluminate, barium sulfate, calcium oxide, iron sulfide, and mixtures thereof.
Claim 2
Dependent Claim
65 words
The method of claim 2 wherein said essentially non cross-linked polymeric anhydride is at least a tetramer of an organic anhydride monomer and a non-anhydride hydrocarbon monomer, said condensation polymer is one selected from the group consisting of phenol-aldehyde, urea-aldeyde, aniline-aldehyde, melamine-aldehyde, polyimide, polybenzimidazole, saturated polyester, and mixtures thereof, and said heating temperature is at least the temperature midway between said melting and decomposition temperatures.
Claim 3
Dependent Claim
29 words
The method of claim 3 wherein said condensation polymer is phenol-formaldehyde, said polymeric anhydride is poly (methyl vinyl ether/maleic anhydride), and said heating temperature is between 90* and 275*C.
Claim 4
Dependent Claim
61 words
As a new composition of matter, the infusible reaction products formed by the combination under heat of a thermosetting condensation polymer which upon curing generates a by-product containing a functional radical selected from the group consisting of hydroxyl, amine, and mixtures thereof, an essentially non cross-linked polymeric organic acid anhydride containing at least two anhydride groups, and a filler material therefor.
Claim 5
Dependent Claim
28 words
The composition of matter of claim 5 wherein said condensation polymer is one selected from the group consisting of phenol-aldehyde, urea-aldehyde, aniline-aldehyde, melamine-aldehyde, polyimide, polybenzimidazole, and mixtures thereof.
Claim 6
Dependent Claim
55 words
The composition of matter of claim 6 wherein said filler material is selected from the group consisting of asbestos, woodflour, chopped fibers, cloth, carbon, silicon carbide, aluminum oxide, aluminum oxide-zirconium oxide, diamond, boron nitride, silica, magnesia spinel, aluminum, copper, iron, potassium fluoro borate, sodium fluoro aluminate, barium sulfate, calcium oxide, iron sulfide, and mixtures thereof.
Claim 7
Dependent Claim
23 words
The composition of matter of claim 7 wherein said condensation polymer is phenol-formaldehyde and said acid anhydride is poly (methyl vinyl ether/maleic anhydride).
Claim 8
Dependent Claim
92 words
An article of manufacture consisting essentially of from 5 to 100 parts By weight of the infusible reaction product formed by the combination under heat of from 2.5 to 99 parts by weight of a thermosetting condensation polymer which upon curing generates a by-product containing a functional radical selected from the group consisting of hydroxyl, amine, and mixtures thereof with 0.05 to 50 parts by weight of an essentially non cross-linked polymeric acid anhydride containing at least two anhydride groups, and from 0 to 95 parts by weight of a filler material.
Claim 9
Dependent Claim
28 words
The article of manufacture of claim 9 wherein said condensation polymer is one selected from the group consisting of phenol-aldehyde, urea-aldehyde, aniline-aldhyde, melamine-aldehyde, polyimide, polybenzimidazole, and mixtures thereof.
Claim 10
Dependent Claim
61 words
The article of manufacture of claim 9 wherein said filler material is selected from the group consisting of asbestos, woodflour, chopped and milled fibers, cloth, carbon, silicon carbide, aluminum oxide, aluminum oxide-zirconium oxide, diamond, boron nitride, silica, and magnesia spinel zirconia, magnesia spinel, aluminum, copper, iron, potassium fluoro borate, sodium fluoro aluminate, barium sulfate, iron sulfide, calcium oxide, and mixtures thereof.
Claim 11
Dependent Claim
66 words
The article of claim 11 wherein said article is a grinding wheel comprised of from 5 to 25 parts by weight of said infusible reaction product and 75 to 95 parts by weight of filler material, said filler material being an abrasive selected from the group consisting of silicon carbide, aluminum oxide, magnesia spinel, magnesia spinel-zirconium oxide, aluminum oxide-zirconium oxide, diamond, boron nitride, and mixtures thereof.
Claim 12
Dependent Claim
23 words
The grinding wheel of claim 12 wherein said condensation polymer is phenol-formaldehyde and said polymeric acid anhydride is poly (methyl vinyl ether/maleic anhydride).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |