US3839289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aminotriazine-aldehyde resins and process for preparation
Assignee: Plastics Engineering Co
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Filing: 1972-03-08
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Granted: 1974-10-01
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Expires: 1992-03-08
Abstract
Abstract A polyamino triazine, such as melamine or benzoguanamine, etc., is reacted with an aldehyde such as formaldehyde, and a vinyl compound containing two active hydrogens capable of reaction with an aldehyde or alkylol group in such a manner as not to react with or destroy the vinyl group. Typical vinyl-containing compounds are acrylamide, diacetone acrylamide, allyl amine, etc. The resultant resins are capable of being cured by free radical catalysts through the vinyl group. The resulting crosslinked products have excellent electrical properties and are particularly useful as molding compositions for encapsulating electrical parts, and also as binders in fiber-reinforced plastics.
Inventors
- 👤 P Waitkus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:26
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/38; C; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C08G12/34; C08L; C08L67/00; C08L67/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
61 words
A PROCESS FOR PRODUCING AND CURING A MOLDING RESIN OF IMPROVED CURING AND ELECTRICAL RESISTANCE CHARACTERISTICS COMPRISING THE STEPS OF REACTING IN AN INERT LIQUID MEDIUM: A. TRIAZINE COMPOUND SELECTED FROM THE CLASS CONSISTING OF MELAMINE AND BENZOGUANAMINE; B. AN ALDEHYDE SELECTED FROM THE CLASS CONSISTING OF FORMAL DEHYDE, ACETALDEHYDE, CHLORACTADEHYDE AND FURFURALDEHYDE; AND C. A VINYL COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
61 words
A PROCESS FOR PRODUCING AND CURING A MOLDING RESIN OF IMPROVED CURING AND ELECTRICAL RESISTANCE CHARACTERISTICS COMPRISING THE STEPS OF REACTING IN AN INERT LIQUID MEDIUM: A. TRIAZINE COMPOUND SELECTED FROM THE CLASS CONSISTING OF MELAMINE AND BENZOGUANAMINE; B. AN ALDEHYDE SELECTED FROM THE CLASS CONSISTING OF FORMAL DEHYDE, ACETALDEHYDE, CHLORACTADEHYDE AND FURFURALDEHYDE; AND C. A VINYL COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
12 words
The process of claim 1 in which said liquid medium is water.
Claim 4
Dependent Claim
11 words
The process of claim 2 in which said aldehyde is formaldehyde.
Claim 5
Dependent Claim
12 words
The process of claim 3 in which said triazine compound is melamine.
Claim 6
Dependent Claim
44 words
The process of claim 4 in which the proportion of said vinyl compound is 0.1-10 moles per mole of melamine and the proportion of said aldehyde is 1.5-2.5 moles per mole of melamine plus an additional 1.5-3 moles per mole of said vinyl compound.
Claim 7
Dependent Claim
36 words
The process of claim 5 in which said reaction is effected at a temperature of 85*-95* C., the pH is initially 7-8 and prior to the complete removal of water the pH is adjusted to 10-12.
Claim 8
Dependent Claim
13 words
The process of claim 6 in which said vinyl compound is diacetone acrylamide.
Claim 9
Dependent Claim
12 words
The process of claim 6 in which said vinyl compound is acrylamide.
Claim 10
Dependent Claim
13 words
The process of claim 6 in which said vinyl compound is vinylmethyl ketone.
Claim 11
Dependent Claim
13 words
The process of claim 6 in which said vinyl compound is allyl amine.
Claim 12
Dependent Claim
12 words
The process of claim 3 in which said triazine compound is benzoguanamine.
Claim 13
Dependent Claim
13 words
The process of claim 11 in which said vinyl compound is diacetone acrylamide.
Claim 14
Dependent Claim
35 words
The process of claim 1 in which 0.1-5 percent by weight of a peroxy free radical generating catalyst is added to the resin product and the mixture is cured at a temperature of 300*-350* F.
Claim 15
Dependent Claim
21 words
The process of claim 1 in which said catalyst is a peroxide selected from the class of benzoyl and dicumyl peroxides.
Claim 16
Dependent Claim
23 words
The process of claim 13 in which said resin is admixed with 5-50 percent by weight of styrene prior to said curing step.
Claim 17
Dependent Claim
24 words
The process of claim 13 in which said resin is admixed with 5-50 percent by weight of diallyl phthalate prior to said curing step.
Claim 18
Dependent Claim
17 words
A resin of improved curing and electrical resistance properties produced according to the process of claim 1.
Claim 19
Dependent Claim
13 words
The process of claim 14 in which said curing temperature is 300*-350* F.
References Cited (Backward Citations)
US3535148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |