Patent US2662889A successfully refreshed from Google Patents.
US4155900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardants for synthetic resins
Assignee: Phillips Petroleum Co
•
Filing: 1978-09-06
•
Granted: 1979-05-22
•
Expires: 1998-09-06
Abstract
Abstract A phosphorus-containing flame retardant for synthetic resins is produced by (1) combining suitable amounts of at least one of certain phosphorus oxide compounds, at least one of certain nitrogenous compounds, and hydroxy compounds including dipentaerythritol and at least one hydroxy polyalkylene oxide having a molecular weight not greater than 800 and being selected from compounds having the formula, HO--(R--O) n --H or HO--(R--O) m --R' wherein R is an alkylene or cycloalkylene hydrocarbyl radical having 1 to 7 carbon atoms, n is 3 or greater, m is 2 or greater, and R' is a methyl or ethyl radical, wherein the amount of said at least one hydroxy polyalkylene oxide is no greater than about 30 weight percent of the total hydroxy compounds, and (2) heating the components under such conditions that the resulting product when incorporated into a synthetic resin will not cause significant foaming of the synthetic resin when it is subjected to molding conditions.
Inventors
- 👤 Harold C. Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:40
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02; C08L; C08L101/00
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
224 words
A phosphorus-containing flame retardant for synthetic resins comprising the product produced by combining reactants comprising 1-100 parts by weight of at least one phosphorus oxide compound of the formula (P 2 O 5 ) 0 .5-1.0 (H 2 O) 0 .0-1.5 ; 1-100 parts by weight of at least one nitrogen compound selected from the group consisting of melamine, dicyandiamide, urea, and dimethylurea; and 1-100 parts by weight of hydroxy compounds including dipentaerythritol and at least one hydroxy polyalkylene oxide having a molecular weight not greater than 800 and being selected from compounds having the formula HO--(R--O) n --H or HO--(R--O) m --R' wherein R is an alkylene or cycloalkylene hydrocarbyl radical having 1 to 7 carbon atoms, n is 3 or greater, m is 2 or greater, and R' is a methyl or ethyl radical, wherein the amount of said at least one hydroxy polyalkylene oxide is no greater than about 30 weight percent of the total hydroxy compounds, under suitable reaction conditions, said suitable conditions comprising employing amounts of said reactants suitable for yielding said phosphorus-containing flame retardant and heating said combined reactants such that said flame retardant when incorporated into a synthetic resin will not cause significant void formation in the synthetic resin when it is subjected to molding conditions but will still impart flame resistance to the synthetic resin composition.
Claim 2
Dependent Claim
224 words
A phosphorus-containing flame retardant for synthetic resins comprising the product produced by combining reactants comprising 1-100 parts by weight of at least one phosphorus oxide compound of the formula (P 2 O 5 ) 0 .5-1.0 (H 2 O) 0 .0-1.5 ; 1-100 parts by weight of at least one nitrogen compound selected from the group consisting of melamine, dicyandiamide, urea, and dimethylurea; and 1-100 parts by weight of hydroxy compounds including dipentaerythritol and at least one hydroxy polyalkylene oxide having a molecular weight not greater than 800 and being selected from compounds having the formula HO--(R--O) n --H or HO--(R--O) m --R' wherein R is an alkylene or cycloalkylene hydrocarbyl radical having 1 to 7 carbon atoms, n is 3 or greater, m is 2 or greater, and R' is a methyl or ethyl radical, wherein the amount of said at least one hydroxy polyalkylene oxide is no greater than about 30 weight percent of the total hydroxy compounds, under suitable reaction conditions, said suitable conditions comprising employing amounts of said reactants suitable for yielding said phosphorus-containing flame retardant and heating said combined reactants such that said flame retardant when incorporated into a synthetic resin will not cause significant void formation in the synthetic resin when it is subjected to molding conditions but will still impart flame resistance to the synthetic resin composition.
Claim 3
Dependent Claim
62 words
A phosphorus-containing flame retardant according to claim 1 wherein the reactants comprise phosphorus pentoxide, phosphorous acid, said at least one nitrogenous compound, and said hydroxy compound and the parts by weight of said reactants per hundred parts by weight of the total reactants is as follows: ______________________________________
phosphorus pentoxide 10-75
phosphorous acid 0.5-25
nitrogenous compound or compounds
10-70
hydroxy compounds 5-50.
______________________________________
Claim 4
Dependent Claim
14 words
A phosphorus-containing flame retardant according to claim 2 wherein said nitrogen compound is melamine.
Claim 5
Dependent Claim
89 words
A phosphorus-containing flame retardant according to claim 3 wherein said hydroxy polyalkylene oxide is selected from the group consisting of triethylene glycol, tetramethylene glycol, pentamethylene glycol, tetraethylene glycol, tetrapropylene glycol, tetrabutylene glycol, pentaethylene glycol, pentapropylene glycol, pentabutylene glycol, hexamethylene glycol, hexaethylene glycol, polyethylene glycol, dimethylene glycol monomethyl ether, dimethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, dipropylene glycol monoethyl ether, trimethylene glycol monomethyl ether, trimethylene glycol monoethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, tetrapropylene glycol monomethyl ether, and polyethylene glycol monomethyl ether.
Claim 6
Dependent Claim
39 words
A phosphorus-containing flame retardant according to claim 4 wherein said hydroxy polyalkylene oxide is selected from the group consisting of tetraethylene glycol, polyethylene glycol having a molecular weight of 200, diethylene glycol monomethyl ether, and diethylene glycol monoethyl ether.
Claim 7
Dependent Claim
37 words
A phosphorus-containing flame retardant according to claim 5 wherein said at least one hydroxy polyalkylene oxide is employed in an amount in the range of about 25 weight percent of the total weight of the hydroxy compounds.
Claim 8
Dependent Claim
33 words
A phosphorus-containing flame retardant according to claim 6 wherein the parts by weight of hydroxy compounds per hundred parts by weight of the reactants employed in making the flame retardant is about 33.
Claim 9
Dependent Claim
36 words
A phosphorus-containing flame retardant according to claim 6 wherein the parts by weight per hundred parts by weight of reactants is as follows: ______________________________________
phosphorus pentoxide 25
phosphorous acid 3
melamine 39
hydroxy compounds 33.
______________________________________
Claim 10
Dependent Claim
19 words
A phosphorus-containing flame retardant according to claim 8 wherein the hydroxy compounds consist essentially of dipentaerythritol and tetraethylene glycol.
Claim 11
Dependent Claim
25 words
A phosphorus-containing flame retardant according to claim 8 wherein the hydroxy compounds consist essentially of dipentaerythritol and polyethylene glycol having a molecular weight of 200.
Claim 12
Dependent Claim
21 words
A phosphorus-containing flame retardant according to claim 8 wherein the hydroxy compounds consist essentially of dipentaerythritol and diethylene glycol monomethyl ether.
Claim 13
Dependent Claim
21 words
A phosphorus-containing flame retardant according to claim 8 wherein the hydroxy compounds consist essentially of dipentaerythritol and diethylene glycol monoethyl ether.
Claim 14
Dependent Claim
23 words
A flame-resistant synthetic resin composition comprising at least one synthetic resin and flame inhibiting amount of a phosphorus-containing flame retardant of claim 1.
Claim 15
Dependent Claim
34 words
A flame-resistant synthetic resin composition according to claim 13 wherein said composition contains about 10 to about 60 parts by weight of said phosphorus-containing flame retardant per 100 parts by weight of synthetic resin.
Claim 16
Dependent Claim
28 words
A flame-resistant synthetic resin composition according to claim 14 wherein said synthetic resin is selected from the group consisting of polyolefin homopolymers, polyolefin copolymers, acrylonitrile-butadiene-styrene polymer, and polystyrene.
Claim 17
Dependent Claim
47 words
A flame-resistant synthetic resin composition according to claim 15 wherein the synthetic resin consists essentially of one or more molding grade homopolymers or copolymers of mono-alpha-olefins having the general formula CH 2 ═CHR" wherein R" represents hydrogen or a hydrocarbyl radical having 1 to 10 carbon atoms.
Claim 18
Dependent Claim
15 words
A flame-resistant synthetic resin composition according to claim 16 wherein the synthetic resin is polypropylene.
Claim 19
Dependent Claim
41 words
A flame-resistant synthetic resin composition according to claim 17 wherein said at least one hydroxy polyalkylene oxide is employed in an amount in the range of about 1 to about 80 weight percent of the total weight of the hydroxy compounds.
Claim 20
Dependent Claim
79 words
A flame-resistant synthetic resin composition according to claim 18 wherein said reactants comprise phosphorus pentoxide, phosphorous acid, said at least one nitrogenous compound, and said hydroxy compounds and the parts by weight of said reactants per hundred parts by weight of the total reactants is as follows: ______________________________________
phosphorus pentoxide 10-75
phosphorous acid 0.5-25
nitrogenous compound or compounds
10-70
hydroxy compounds 5-50.
______________________________________ ______________________________________
phosphorus pentoxide 10-75
phosphorous acid 0.5-25
nitrogenous compound or compounds
10-70
hydroxy compounds 5-50.
______________________________________
Claim 21
Dependent Claim
15 words
A flame-resistant synthetic resin composition according to claim 19 wherein said nitrogen compound is melamine.
Claim 22
Dependent Claim
39 words
A flame-resistant synthetic resin composition according to claim 20 wherein said hydroxy polyalkylene oxide is selected from the group consisting of tetraethylene glycol, polyethylene glycol having molecular weight of 200, diethylene glycol monomethyl ether, and diethylene glycol monoethyl ether.
Claim 23
Dependent Claim
41 words
A flame-resistant synthetic resin composition according to claim 21 wherein said at least one hydroxy polyalkylene oxide is employed in an amount in the range of about 20 to about 30 weight percent of the total weight of the hydroxy compounds.
Claim 24
Dependent Claim
32 words
A flame-resistant synthetic resin composition according to claim 22 containing about 30 to about 50 parts by weight of said phosphorus-containing flame retardant per 100 parts by weight of said synthetic resin.
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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |