US4433143A
Expired / Lapsed
US
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Methylated methylolated melamine composition
Assignee: Solutia Inc
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Filing: 1981-09-09
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Granted: 1984-02-21
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Expires: 2001-09-09
Abstract
Abstract A partially methylated partially methylolated melamine composition comprising a fraction of highly polar monomers characterized by liquid chromatography elution ratios. The composition is useful as a crosslinking agent for coating resins and provides curable coating systems capable of fast cure response at relatively low curing temperatures.
Inventors
- 👤 J. Owen Santer
- 👤 George T. Spitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:53
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/40; C08G12/42; C08G12/424; C08G12/425; C08G12/427; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/40; C07D251/54; C07D251/64; C07D251/70; C09; C09D; C09D161/00; C09D161/20; C09D161/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
A methylated methylolated melamine composition comprising a combined formaldehyde content in the range of about 2.4 to about 3.2 moles per mole of melamine and a combined methanol content in the range of about 2.3 to about 3.0 moles per mole of melamine and a combined methanol content in the range of about 0.7 to about 1.0 mole per mole of combined formaldehyde and possessing a first elution ratio in the range of about 0.1 to about 1.5 and a second elution ratio in the range of about 0.2 to about 1.1, and an oligomer content of no more than about 70 percent by weight.
Claim 2
Dependent Claim
105 words
A methylated methylolated melamine composition comprising a combined formaldehyde content in the range of about 2.4 to about 3.2 moles per mole of melamine and a combined methanol content in the range of about 2.3 to about 3.0 moles per mole of melamine and a combined methanol content in the range of about 0.7 to about 1.0 mole per mole of combined formaldehyde and possessing a first elution ratio in the range of about 0.1 to about 1.5 and a second elution ratio in the range of about 0.2 to about 1.1, and an oligomer content of no more than about 70 percent by weight.
Claim 3
Dependent Claim
41 words
The melamine composition according to claim 1 wherein the first liquid chromatographic elution ratio is in the range of about 0.1 to about 0.4 and the second liquid chromatographic elution ratio is in the range of about 0.3 to about 1.0.
Claim 4
Dependent Claim
23 words
The melamine compositions of claim 2 or 1 wherein the hydrocarbon solvent tolerance is in the range of about 2 to about 10.
Claim 5
Dependent Claim
24 words
The melamine compositions of claim 2 or 1 wherein the number average molecular weight is in the range of about 250 to about 500.
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) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |