Patent US4514328A successfully refreshed from Google Patents.
US4514328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particulate material reducing the ignitability of combustible substances
Assignee: Hoechst AG
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Filing: 1983-04-15
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Granted: 1985-04-30
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Expires: 2003-04-15
Abstract
Abstract The disclosure relates to a particulate agent based on free-flowing, pulverulent ammonium polyphosphate of the general formula H.sub.(n-M)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1 in which n stands for a whole number with an average value of about 20 to 800 and the ratio of m/n is about 1. The agent reduces the ignitability of combustible substances and constists of (a) about 80 to 99.5 mass % ammonium polyphosphate and (b) about 0.5 to 20 mass % hardened epoxide resin having an epoxide equivalent weight of about 170 to about 220, the epoxide resin enveloping the individual ammonium polyphosphate particles.
Inventors
- 👤 Horst Staendeke
- 👤 Franz-Josef Dany
- 👤 Joachim Kandler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:24
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/009; C08K; C08K3/00; C08K3/32; C08K9/00; C08K9/10; C09; C09K; C09K21/00; C09K21/06; C09K21/12; C09K21/14; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10S521/00; Y10S521/906
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
83 words
Particulate agent, for flameproofing polyurethanes or polyurethane foam plastics, based on a free-flowing pulverulent ammoniumpolyphosphate of the general formula H.sub.n-m)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1 in which n stands for a whole number with an average value of 20 to 800 and the ratio of m/n is about 1, and an epoxide resin with an epoxide equivalent weight of 170 to 220, the agent containing: (a) 80 to 99.5 mass percent ammoniumpolyphosphate, and (b) 0.5 to 20 mass percent epoxide enveloping the individual ammoniumpolyphosphate particles.
Claim 2
Dependent Claim
83 words
Particulate agent, for flameproofing polyurethanes or polyurethane foam plastics, based on a free-flowing pulverulent ammoniumpolyphosphate of the general formula H.sub.n-m)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1 in which n stands for a whole number with an average value of 20 to 800 and the ratio of m/n is about 1, and an epoxide resin with an epoxide equivalent weight of 170 to 220, the agent containing: (a) 80 to 99.5 mass percent ammoniumpolyphosphate, and (b) 0.5 to 20 mass percent epoxide enveloping the individual ammoniumpolyphosphate particles.
Claim 3
Dependent Claim
19 words
Agent as claimed in claim 1, wherein the particles have a mean size of about 0.01 to 0.05 mm.
Claim 4
Dependent Claim
23 words
Agent as claimed in claim 1 or 2, wherein n stands for a whole number with an average value of 450 to 800.
Claim 5
Dependent Claim
23 words
Agent as claimed in claims 1 or 3, wherein the epoxide resin is used in a proportion of 1 to 5 mass %.
Claim 6
Dependent Claim
52 words
Agent as claimed in claims 1 or 4, wherein the epoxide resin is an alcohol-soluble, hardenable resin which is obtained by reacting a dihydric or polyhydric alcohol with epichlorhydrin or glycerol dichlorohydrin under alkaline conditions or, if desired, in the presence of an acid catalyst, and then treating it with an alkali.
Claim 7
Dependent Claim
105 words
Particulate agent for flameproofing polyurethanes or polyurethane foam plastics based on a free-flowing, pulverulent ammonium polyphosphate of the general formula H.sub.(n-m)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1 in which n stands for a whole number with an average value of 20 to 800 and the ratio of m/n is about 1, and an epoxide resin with an epoxide equivalent weight of 170 to 220, the agent containing: (a) 80 to 99.5 mass percent ammonium polyphosphate, and (b) 0.5 to 20 mass percent hardened epoxide enveloping the individual ammonium polyphosphate particles, and the agent being present in the polyurethane foam plastics in amounts from 5 to 25 mass percent.
Claim 8
Dependent Claim
105 words
Particulate agent for flameproofing polyurethanes or polyurethane foam plastics based on a free-flowing, pulverulent ammonium polyphosphate of the general formula H.sub.(n-m)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1 in which n stands for a whole number with an average value of 20 to 800 and the ratio of m/n is about 1, and an epoxide resin with an epoxide equivalent weight of 170 to 220, the agent containing: (a) 80 to 99.5 mass percent ammonium polyphosphate, and (b) 0.5 to 20 mass percent hardened epoxide enveloping the individual ammonium polyphosphate particles, and the agent being present in the polyurethane foam plastics in amounts from 5 to 25 mass percent.
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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) | 1988-04-29 | 1988-10-29 | 1989-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-29 | 1992-10-29 | 1993-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-29 | 1996-10-29 | 1997-04-30 | $7700.00 | Window Closed / Lapsed |