MXPA01005862A - Non-halogenated polyamide composition - Google Patents
Non-halogenated polyamide compositionInfo
- Publication number
- MXPA01005862A MXPA01005862A MXPA/A/2001/005862A MXPA01005862A MXPA01005862A MX PA01005862 A MXPA01005862 A MX PA01005862A MX PA01005862 A MXPA01005862 A MX PA01005862A MX PA01005862 A MXPA01005862 A MX PA01005862A
- Authority
- MX
- Mexico
- Prior art keywords
- nylon
- composition
- weight
- polyamide
- further characterized
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 57
- 239000004952 Polyamide Substances 0.000 title claims abstract description 42
- 229920002647 polyamide Polymers 0.000 title claims abstract description 42
- 239000011528 polyamide (building material) Substances 0.000 title claims abstract description 37
- 239000004677 Nylon Substances 0.000 claims abstract description 35
- 229920001778 nylon Polymers 0.000 claims abstract description 35
- 229920001577 copolymer Polymers 0.000 claims abstract description 21
- ZQKXQUJXLSSJCH-UHFFFAOYSA-N Melamine cyanurate Chemical compound NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000002667 nucleating agent Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000010899 nucleation Methods 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 9
- 239000003063 flame retardant Substances 0.000 claims description 9
- LCJRHAPPMIUHLH-UHFFFAOYSA-N 1-$l^{1}-azanylhexan-1-one Chemical compound [CH]CCCCC([N])=O LCJRHAPPMIUHLH-UHFFFAOYSA-N 0.000 claims description 5
- 229920002292 Nylon 6 Polymers 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 5
- 239000000314 lubricant Substances 0.000 claims description 5
- 239000006082 mold release agent Substances 0.000 claims description 5
- 239000000049 pigment Substances 0.000 claims description 5
- 239000004014 plasticizer Substances 0.000 claims description 5
- 230000003014 reinforcing Effects 0.000 claims description 5
- 239000003381 stabilizer Substances 0.000 claims description 4
- 239000006096 absorbing agent Substances 0.000 claims description 3
- 239000002216 antistatic agent Substances 0.000 claims description 3
- 229920000393 Nylon 6/6T Polymers 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000000975 dye Substances 0.000 claims 3
- 230000031700 light absorption Effects 0.000 claims 2
- 229920000232 polyglycine polymer Polymers 0.000 claims 2
- ZFSLODLOARCGLH-UHFFFAOYSA-N Cyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N Melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims 1
- 229920000877 Melamine resin Polymers 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 8
- 150000001875 compounds Chemical class 0.000 description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- OZAIFHULBGXAKX-UHFFFAOYSA-N precursor Substances N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229940063655 Aluminum stearate Drugs 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- CEGOLXSVJUTHNZ-UHFFFAOYSA-K aluminium tristearate Chemical compound [Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CEGOLXSVJUTHNZ-UHFFFAOYSA-K 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L cacl2 Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- 238000007706 flame test Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- KNQVWTDLQQGKSV-UHFFFAOYSA-O hydroxy-oxo-phenylphosphanium Chemical compound O[P+](=O)C1=CC=CC=C1 KNQVWTDLQQGKSV-UHFFFAOYSA-O 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000000087 stabilizing Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Abstract
A polyamide composition including (a) at least one polyamide other than nylon 2,2, or a copolymer of at least two polyamide repeating units, neither of which is nylon 2,2, (b) melamine cyanurate, and (c) a nucleating agent such as nylon 2,2 in an amount effective to cause nucleation of the polyamide of (a), has good flameretarding properties and relatively short set-up times in molding processes.
Description
COMPOSITION OF NON-HALOGENATED POLYAMIDE
BACKGROUND OF THE INVENTION
The present invention relates to non-halogenated polyamide compositions, and in particular to compositions of this type having flame retardant properties. Polyamides such as nylon have a variety of commercial uses. An important use is like a resin for molding articles. It is often important that molded polyamide articles have flame retardant properties. The means used in the past to achieve flame retardancy in polyamide compositions have presented several problems or drawbacks. The incorporation of halogen compounds can improve the flame retardancy, but it does not offer the most environmentally friendly system. One problem, for example, is the reduction in mold life due to the known nature of the halogens. Nalogenated llamai retardant nylon compositions (NHFR) can be created by incorporating melamine cyanurate. Nylon products of NHFR prepared with a copolymer base resin have a high degree of stiffness, but the copolymer causes the composition to have a longer curing or setting time in the molding processes. A faster setting time is desired in molding procedures to increase production and thus reduce the
cost d €? manufacturing. The reduction of the relative viscosity (VR) of the base copolymer resin will reduce the setting time, but also decrease the flame retardancy (as measured by the UL-VO vertical flame test of Underwriters' Laboratories). There is a need for improved polyamide compositions that have good flame retardant properties and relatively fast setting times in processes or molding, while also having other desirable properties such as stiffness.
BRIEF DESCRIPTION OF THE INVENTION
One aspect of the present invention is a polyamide composition comprising (a) at least one nylon polyamide tape
2,2, or a copolymer of at least two repeat units of polyamide none of which is nylon 2,2, (b) melamine cyanurate and (c) a nucleating agent in an amount effective to cause nucleation of the polyamide of
(to). In a preferred embodiment, the nucleating agent is nylon 2.2. Nylon 2,2 is preferably present in an amount of from about 0.001% to about 0.1% by weight, most preferably in an amount between about 0.01% and about 0.05% by weight. The polyamide of (a) can be for example nylon 6.6. As another example, it can be a nylon 6,6 and nylon 6 copolymer. Preferably, the
polyamide has a relative viscosity (VR) of about 40 to about 55. A VR on the scale of 44-50 is especially preferred. The composition may further comprise one or more fillers, stabilizing reinforcing agents, colorants, other flame retardants, mold release agents, plasticizers, pigments, ultraviolet light absorbing agents, antistatic agents or lubricants. Preferably the copolymer is about 75-95% by weight of the composition, the melamine cyanurate is about 1-15% by weight of the composition, and the nucleating agent (eg, 2.2 nylon) is about 0.001 -0.1% by weight of the composition. In a particularly preferred embodiment, the copolymer is about 85-95% by weight of the composition, the melamine cyanurate is about 5-10% by weight of the composition, and the 2.2 nylon is about 0.01- 0.05% by weight of the composition. Another aspect of the present invention is a process for producing nucleated polyamide. The process consists of cooling a molten polyamide other than nylon 2.2 in the presence of (a) melamine cyanurate, (b) a nucleating agent in an amount effective to produce nucleation of the polyamide. In various embodiments of the process, the reagents and proportions may be as described above with respect to the composition.
The compositions of the present invention exhibit commercially desirable flame retardancy, stiffness and flow; however, they also have relatively short setting times and thus reduced molding cycle times. In particular, the compositions of the present invention can comply with the UL-VO flame retardancy test of Underwriter's Labs while maintaining relatively short setting times in molding operations. This improvement in molding cycle time increases the reduction and reduces the unit cost.
DESCRIPTION OF SPECIFIC MODALITIES
The composition of the present invention contains one or more polyamides which are condensation polymers obtained by the polycondensation of carboxylic amino acids or mixtures of diamines and dicarboxylic acids by influencing interpolyamides obtained by polycondensation of different polyamide forming components. Suitable polyamides include nylon 6,6. Other suitable polyamides are copolymers of at least two repeating units of polyamide, or mixtures of alloys of two or more polyamides. Suitable copolymers include copolymers of nylon 6,6 with nylon 6, nylon 6IA, nylon 6TA, and the like. The compositions of the present invention also include melamine cyanurate. A variety of ways to provide this compound in polymeric compositions is taught in U.S. Patent 4,180,496,
4,298,518, 4,317,766, 4,321,189, 4,363,890, 4,789,698 and 5,135,974, each of which is incorporated herein by reference. In general, melamine cyanurate for the final composition can be provided by incorporating the compound directly with the polyamide and other ingredients before heating, or alternatively precursor compounds can be incorporated which will react to form melamine cyanurate in situ during the high temperature process. . The compositions of the present invention also include a nucleating agent, preferably a non-heterogeneous nucleating agent. A currently preferred nucleating agent is nylon 2.2. Other suitable non-heterogeneous nucleating agents include nylon 4.6 and the compound formed from the reaction of benzene phosphinic acid and aluminum stearate. Other suitable nucleating agents include heterogeneous nucleating agents such as titanium dioxide and calcium chloride. The nucleating agent (for example nylon 2.2) and the melamine cyanurate or precursor compounds therefor can be incorporated into the polyamide before, during or after the condensation step. For example, nylon 2.2 and melamine cyanurate can be added to the molten polyamide. Alternatively, they can be mixed with the solid polyamide and then the mixture can be melted. As another alternative, the solid polyamide in the form of lumps, tablets or flakes can be coated or sprinkled with the ingredients and then melted.
The compositions of the present invention may further comprise one or more polymer additives such as fillers, reinforcing agents, stabilizers, colorants, other flame retardants, mold release agents, plasticizers, pigments, ultraviolet light absorbing agents, agents antistatic and lubricants. The compositions of the present invention can be molded into articles in various ways using equipment and methods that are well known. The present invention is particularly useful for designing thermoplastic applications that require high flame retardancy. A specific example of a moldable flame retardant nylon composition of the present invention is one comprising nylon 6 / nylon 6,6 (approximately 91% by weight) copolymer, melamine cyanurate (approximately 7%), and nylon 2.2 (about 0.02%), in addition to, optionally, one or more polymer additives as described above. The copolymer, for example, can comprise about 89% by weight of nylon 6,6 and about 11% of nylon 6, in addition to 0.05% of acetic acid. All the compositions and methods described and claimed herein can be made without experimentation in light of the present disclosure. Although the compositions and methods of this invention have been described with respect to preferred embodiments, it will be apparent to those skilled in the art that variations can be applied to the compositions and methods in the steps or sequence of steps of the method described herein. without
depart from the concept, spirit and scope of the invention. Specifically, it will be apparent that certain agents that are chemically related can substitute the agents described herein although the same or similar results would be achieved. All these substitutes and similar modifications apparent to those skilled in the art should be considered within the spirit, scope and concept of the invention, as defined in the appended claims.
Claims (20)
1. - A polyamide composition comprising (a) at least one nylon 2.2 ribbon polyamide or a copolymer of at least two polyamide repeat units, none of which is nylon 2.2, (b) cyanurate melamine and (c) a nucleating agent in an amount effective to produce nucleation of the polyamide of (a). 2. The composition according to claim 1, further characterized in that the nucleating agent is nylon 2.
2.
3. The composition according to claim 1, further characterized in that nylon 2.2 is present in an amount between about 0.001% and about 0.1% by weight.
4. The composition according to claim 3, further characterized in that the nylon 2.2 is present in an amount between about 0.01% and about 0.5% by weight
5. The composition according to claim 1, further characterized because the polyamide of (a) is nylon 6,6.
6. The composition according to claim 1, further characterized in that the copolymer of (a) is nylon 6,6 and nylon 6 copolymer.
7. - The composition according to claim 1, further characterized in that it comprises one or more fillers, reinforcing agents, stabilizers, dyes or flame retardants, mold release agents, plasticizers, pigments, ultraviolet light absorbing agents, agents antistatic or lubricants.
8. A polyamide composition comprising (a) a copolymer of nylon 6,6 and nylon 6, (b) melamine cyanurate and (c) nylon 2,2 in an amount effective to produce nucleation of the copolymer.
9. The composition according to claim 8, further characterized in that the copolymer is about 75-95% by weight of the composition, the melamine cyanurate is about 1-15% by weight of the composition and nylon 2 , 2 of about 0.001-0.1% by weight of the composition.
10. The composition according to claim 9, further characterized in that the copolymer is about 85-95% by weight of the composition, the melamine cyanurate is about 5-10% by weight of the composition and the nylon 2.2 of about 0.01- 0.05% by weight of the composition.
11. The composition according to claim 10, further characterized by comprising one or more fillers, reinforcing agents, stabilizers, dyes or flame retardants, mold release agents, plasticizers, pigments, ultraviolet light absorption agents , antistatic agents or lubricants.
12. A process for producing nucleated polyamide consisting of cooling a molten polyamide other than nylon 2.2 in the presence of (a) melamine cyanurate and (b) a nucleating agent in an amount effective to produce nucleation of the polyamide.
13. The method according to claim 12, further characterized because the nucleating agent is nylon 2.2.
14. The method according to claim 13, further characterized in that the nylon 2.2 is present in an amount between about 0.001% and about 0.1% by weight.
15. The process according to claim 13, further characterized in that the nylon 2.2 is present in an amount between about 0.01% and about 0.05% by weight
16. The process according to claim 12, further characterized because the polyamide is a copolymer of nylon 6,6 and nylon 6.
17. The process according to claim 16, further characterized in that the nucleating agent is nylon 2.2.
18. The process according to claim 17, further characterized in that the copolymer is present in an amount of about 75-95% by weight of the composition, the melamine cyanurate is present in an amount of about 1-15. % by weight of the composition, and nylon 2.2 is present in an amount of about 0.001-0.1% by weight of the composition.
19. - The process according to claim 18, further characterized in that the copolymer is present in an amount of about 85-95% by weight of the composition, the melamine cyanurate is present in an amount of about 5-10% by weight. weight of the composition, and nylon 2.2 is present in an amount of about 0.01-0.1% by weight of the composition.
20. The process according to claim 19, further characterized in that one or more fillers, reinforcing agents, stabilizers, dyes, other flame retardants, mold release agents, plasticizers, pigments, ultraviolet light absorption agents, Antistatic agents or lubricants are also present as the polyamide cools.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US60/111,691 | 1998-12-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MXPA01005862A true MXPA01005862A (en) | 2001-12-13 |
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