US4041008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low smoke density fire-retardant resins
Assignee: Ashland Inc
•
Filing: 1975-05-12
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Granted: 1977-08-09
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Expires: 1995-05-12
Abstract
Abstract Curable aliphatic polyester resin compositions formed from aliphatic unsaturated polycarboxylic acids and polyols and a crosslinking aliphatic vinyl monomer are disclosed. The degree of unsaturation in the polyesters is carefully controlled so that the resin can be cured to produce strong thermoset products. Resins of this nature can be filled with high levels of aluminum hydrate to give compositions that have high oxygen indices and very low smoke densities as measured by the National Bureau of Standards Smoke Chamber. Also, the resins are capable of room temperature curing.
Inventors
- 👤 Joseph M. Makhlouf
- 👤 Earl E. Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:00
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
163 words
A curable aliphatic polyester resin, suitable for molding and laminating, being essentially free of aromatic constituents comprising a mixture of: A. an unsaturated aliphatic polyester derived from polycondensing: 1. organic polyols having a functionality of at least 2, 2. organic polycarboxylic acids having a functionality of at least 2 in which the unsaturated component of the unsaturated polyester is an alpha, beta-ethylenically unsaturated polycarboxylic acid and the equivalent ratio of alpha, beta-ethylenically unsaturated polycarboxylic acid to all other polycarboxylic acid components in the polyester is at least 1 to 1; and B. an aliphatic vinyl monomer which is a lower alkyl ester containing 1 to 4 carbon atoms of methacrylic or acrylic acid and which is copolymerizable with said polyester, C. at least 50 percent by weight hydrated alumina, the percentage by weight being based on total weight of (A), (B) and (C), said composition capable of being completely cured to produce strong thermoset articles of construction which, when burned, produce little smoke.
Claim 2
Dependent Claim
163 words
A curable aliphatic polyester resin, suitable for molding and laminating, being essentially free of aromatic constituents comprising a mixture of: A. an unsaturated aliphatic polyester derived from polycondensing: 1. organic polyols having a functionality of at least 2, 2. organic polycarboxylic acids having a functionality of at least 2 in which the unsaturated component of the unsaturated polyester is an alpha, beta-ethylenically unsaturated polycarboxylic acid and the equivalent ratio of alpha, beta-ethylenically unsaturated polycarboxylic acid to all other polycarboxylic acid components in the polyester is at least 1 to 1; and B. an aliphatic vinyl monomer which is a lower alkyl ester containing 1 to 4 carbon atoms of methacrylic or acrylic acid and which is copolymerizable with said polyester, C. at least 50 percent by weight hydrated alumina, the percentage by weight being based on total weight of (A), (B) and (C), said composition capable of being completely cured to produce strong thermoset articles of construction which, when burned, produce little smoke.
Claim 3
Dependent Claim
40 words
The composition of claim 1 which contains: A. from 20 to 80 percent unsaturated aliphatic polyester, and B. from 80 to 20 percent aliphatic monomer, the percent by weight being based on total weight of unsaturated polyester and aliphatic monomer.
Claim 4
Dependent Claim
22 words
The composition of claim 1 in which the alpha, beta-ethylenically unsaturated polycarboxylic acid is maleic acid or its anhydride, or fumaric acid.
Claim 5
Dependent Claim
27 words
The composition of claim 1 in which the organic polycarboxylic acid component contains an acyclic saturated polycarboxylic acid or anhydride containing from 2 to 10 carbon atoms.
Claim 6
Dependent Claim
47 words
The composition of claim 4 which contains: A. from 0 to 50 equivalent percent of an acyclic saturated polycarboxylic acid or anhydride containing from 2 to 10 carbon atoms, and B. from 50 to 100 equivalent percent of an alpha, beta-ethylenically unsaturated polycarboxylic acid or its anhydride.
Claim 7
Dependent Claim
19 words
The composition of claim 1 in which the polyol component includes alcohols or polyols containing allylic or acrylic unsaturation.
Claim 8
Dependent Claim
11 words
The composition of claim 6 which includes trimethylol propane diallyl ether.
Claim 9
Dependent Claim
26 words
The composition of claim 1 in which the polyol component is an alkylene glycol or an alkylene oxide glycol containing from 2 to 10 carbon atoms.
Claim 10
Dependent Claim
21 words
The composition of claim 1 in which the polyol component contains in part a polyol having a functionality greater than 2.
Claim 11
Dependent Claim
15 words
The composition of claim 1 in which the aliphatic monomer contains a fully esterified polyol.
Claim 12
Dependent Claim
15 words
The composition of claim 1 in which the aliphatic monomer includes in part N-vinyl pyrrolidone.
Claim 13
Dependent Claim
10 words
The composition of claim 1 which further includes antimony oxide.
Claim 14
Dependent Claim
43 words
The composition of claim 1 which contains: A. 75 to 25 percent by weight aliphatic polyester resin; and B. 25 to 75 percent by weight hydrated alumina, the percentages by weight being based on total weight of aliphatic polyester resin and hydrated alumina.
Claim 15
Dependent Claim
35 words
The composition of claim 13 which further includes about 10 to 70 percent by weight glass fibers; the percentage by weight being based on total weight of aliphatic polyester resin, hydrated alumina and fiber glass.
Claim 16
Dependent Claim
10 words
The composition of claim 1 in a cured, crosslinked state.
Claim 17
Dependent Claim
10 words
The composition of claim 14 in a cured, crosslinked state.
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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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |