US4105604A
Expired / Lapsed
US
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Moulding compositions containing a novolak phenolic resin and an amine-boric acid stabilizer-catalyst
Assignee: Societa Italiana Resine SpA SIR
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Filing: 1976-12-15
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Granted: 1978-08-08
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Expires: 1996-12-15
Abstract
Abstract A thermosetting molding composition comprising from 15 to 50 wt.% of Novolak phenolic resin; from 3 to 10 wt.% of hexamine; from 1 to 4 wt.% of a stabilizing-catalyzing mixture consisting of an amine chosen from polyamino aliphatic compounds and mono or polyamino aromatic compounds, and orthoboric or metaboric acid, wherein the ratio between said amino groups and the number of acid equivalents in said mixture is from 0.001:1 to 0.3:1; from 0.5 to 2 wt.% of alkaline earth metal oxide; and one or more inert fillers. This composition is particularly suitable for the production of molded articles by injection molding.
Inventors
- 👤 Silvio Vargiu
- 👤 Pier L. Manzoni
- 👤 Mario Bernasconi
- 👤 Antonio Parodi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:55
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
123 words
A thermosetting injection molding composition comprising: (a) from 15 to 50 wt.% of Novolak phenolic resin; (b) from 3 to 10 wt.% of hexamine; (c) from 1 to 4 wt.% of a stabilizing-catalyzing mixture consisting of an amine selected from the group consisting of aliphatic compounds having two or more amino groups, aromatic compounds having one amino group linked to an aromatic ring and aromatic compounds having two or more amino groups linked to one or more aromatic rings, and orthoboric or metaboric acid, wherein the ratio between said amino groups and the number of acid equivalents in said mixture is from 0.001:1 to 0.3:1; (d) from 0.5 to 2 wt.% of alkaline earth metal oxide; and (e) one or more inert fillers.
Claim 2
Dependent Claim
123 words
A thermosetting injection molding composition comprising: (a) from 15 to 50 wt.% of Novolak phenolic resin; (b) from 3 to 10 wt.% of hexamine; (c) from 1 to 4 wt.% of a stabilizing-catalyzing mixture consisting of an amine selected from the group consisting of aliphatic compounds having two or more amino groups, aromatic compounds having one amino group linked to an aromatic ring and aromatic compounds having two or more amino groups linked to one or more aromatic rings, and orthoboric or metaboric acid, wherein the ratio between said amino groups and the number of acid equivalents in said mixture is from 0.001:1 to 0.3:1; (d) from 0.5 to 2 wt.% of alkaline earth metal oxide; and (e) one or more inert fillers.
Claim 3
Dependent Claim
38 words
The composition of claim 1, wherein said Novolak phenolic resin is the condensation product of formaldehyde with phenol in a molar ratio of from 0.8:1 to 0.98:1, in the presence of a mineral or organic acid as catalyst.
Claim 4
Dependent Claim
16 words
The composition of claim 1, which contains from 20 to 45 wt.% of Novolak phenolic resin.
Claim 5
Dependent Claim
14 words
The composition of claim 1, which contains from 6 to 9 wt.% of hexamine.
Claim 6
Dependent Claim
22 words
The composition of claim 1, wherein said alkaline earth metal oxide is selected from the group consisting of calcium and magnesium oxide.
Claim 7
Dependent Claim
22 words
The composition of claim 1, wherein said alkaline earth metal oxide is present in an amount of from 1 to 1.5 wt.%.
Claim 8
Dependent Claim
15 words
The composition of claim 1, which contains from 1.5 to 3 wt.% of stabilizing-catalyzing mixture.
Claim 9
Dependent Claim
21 words
The composition of claim 1, wherein said ratio between the amino groups and the acid equivalents is from 0.04:1 to 0.2:1.
Claim 10
Dependent Claim
34 words
The composition of claim 1, wherein said inert fillers are selected from the group consisting of wood flour, cellulose, organic fibres and fabrics, paper fibres, asbestos, mica, fluorite, talc, diatomaceous earth and rock flour.
Claim 11
Dependent Claim
33 words
The composition of claim 1, which contains from 0.5 to 3 wt.% of a lubricant selected from the group consisting of waxes, stearic acid and its esters and zinc, calcium and magnesium stearates.
Claim 12
Dependent Claim
106 words
A thermosetting injection molding composition comprising: (a) from 15 to 50 wt.% of Novolak phenolic resin; (b) from 3 to 10 wt.% of hexamine; (c) from 1 to 4 wt.% of a stabilizing-catalyzing mixture consisting of an amine selected from the group consisting of aniline, substituted aminobenzenes, methylenedianilines, phenylenediamines, methylenedianilines and phenylenediamines substituted in the aromatic rings, diethylenetriamine, triethylenetriamine, tetraethylenepentamine and ethylenediamine, and orthoboric or metaboric acid, wherein the ratio between the amino groups and the number of acid equivalents in said mixture is from 0.001:1 to 0.3:1; (d) from 0.5 to 2 wt.% of alkaline earth metal oxide; and (e) one or more inert fillers.
Claim 13
Dependent Claim
106 words
A thermosetting injection molding composition comprising: (a) from 15 to 50 wt.% of Novolak phenolic resin; (b) from 3 to 10 wt.% of hexamine; (c) from 1 to 4 wt.% of a stabilizing-catalyzing mixture consisting of an amine selected from the group consisting of aniline, substituted aminobenzenes, methylenedianilines, phenylenediamines, methylenedianilines and phenylenediamines substituted in the aromatic rings, diethylenetriamine, triethylenetriamine, tetraethylenepentamine and ethylenediamine, and orthoboric or metaboric acid, wherein the ratio between the amino groups and the number of acid equivalents in said mixture is from 0.001:1 to 0.3:1; (d) from 0.5 to 2 wt.% of alkaline earth metal oxide; and (e) one or more inert fillers.
Claim 14
Dependent Claim
31 words
The composition of claim 1 which is fluid at a temperature of from 90° to 130° C and which within this temperature range does not undergo substantial premature hardening and cross-linking.
Claim 15
Dependent Claim
24 words
The composition of claim 12 which hardens completely at a temperature on the order of 160°-170° C in a time of about 30-45 seconds.
Claim 16
Dependent Claim
31 words
The composition of claim 11 which is fluid at a temperature of from 90° to 130° C and which within this temperature range does not undergo substantial premature hardening and cross-linking.
Claim 17
Dependent Claim
24 words
The composition of claim 14 which hardens completely at a temperature on the order of 160°-170° C in a time of about 30-45 seconds.
Claim 18
Dependent Claim
18 words
The composition of claim 1 wherein said amine is an aliphatic compound having two or more amino groups.
Claim 19
Dependent Claim
21 words
The composition of claim 1 wherein said amine is an aromatic compound having one amino group linked to an aromatic ring.
Claim 20
Dependent Claim
25 words
The composition of claim 1 wherein said amine is an aromatic compound having two or more amino groups linked to one or more aromatic rings.
Claim 21
Dependent Claim
14 words
The composition of claim 11 wherein said amine is selected from said substituted aminobenzense.
Claim 22
Dependent Claim
13 words
The composition of claim 11 wherein said amine is selected from said methylenedianilines.
Claim 23
Dependent Claim
13 words
The composition of claim 11 wherein said amine is selected from said phenylenediamines.
Claim 24
Dependent Claim
11 words
The composition of claim 11 wherein said amine is said tetraethylenepentamine.
Claim 25
Dependent Claim
11 words
The composition of claim 11 wherein said amine is said ethylenediamine.
Claim 26
Dependent Claim
11 words
The composition of claim 1 consisting essentially of the recited components.
Claim 27
Dependent Claim
11 words
The composition of claim 11 consisting essentially of the recited components.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-07 | 1982-02-06 | 1982-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-07 | 1986-02-06 | 1986-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-07 | 1990-02-06 | 1990-08-08 | $7700.00 | Window Closed / Lapsed |