CN104650534A - Expansive type flame-retardant polyformaldehyde composition - Google Patents
Expansive type flame-retardant polyformaldehyde composition Download PDFInfo
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- CN104650534A CN104650534A CN201510091135.8A CN201510091135A CN104650534A CN 104650534 A CN104650534 A CN 104650534A CN 201510091135 A CN201510091135 A CN 201510091135A CN 104650534 A CN104650534 A CN 104650534A
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Abstract
The invention provides an expansive type flame-retardant polyformaldehyde composition. The expansive type flame-retardant polyformaldehyde composition comprises the following components in parts by weight: 55-65 parts of polyformaldehyde, 5-15 parts of encapsulated red phosphorus, 5-15 parts of dipentaerythritol, 3-9 parts of melamine, 1-7 parts of ammonium polyphosphate, 3-9 parts of phenolic resin and 1-7 parts of polyurethane. Encapsulated red phosphorus and ammonium polyphosphate are taken as acid sources, phenolic resin and polyurethane are taken as a char forming agent, melamine is taken as an aldehyde absorbing agent and air source, polyformaldehyde is combined to form a compound halogen-free expansive type flame-retardant polyformaldehyde product, and limit oxygen index of the compound halogen-free expansive type flame-retardant polyformaldehyde product is high, so that the compound halogen-free expansive type flame-retardant polyformaldehyde product has good flame retardancy and high strength, and a flame-retardant polyformaldehyde product is broad in application field and large in application range.
Description
Technical field
The present invention relates to a kind of macromolecule modified technical field, be specifically related to a kind of expansion type flame-retarding polyformaldehyde composition.
Background technology
Polyoxymethylene is the polymkeric substance of formaldehyde, is a kind of simple linear polymer not having side chain, high-density, high crystalline, and general structure length has eight to one hundred unit.Polyoxymethylene has excellent mechanical property, anti-fatigue performance and processing characteristics, especially there is excellent frictional behaviour, therefore there is the title of " supersteel ", " taking steel by force ", be widely used in the fields such as electrical equipment, automobile component, medical facilities and office products.
Polyoxymethylene very easily burns, and limiting oxygen index(LOI) only has 15%, traces it to its cause as follows: one, and the volume fraction of polyoxymethylene self oxygen is up to 53%, and during burning, the demand of oxygen is lower to external world; Its two, polyoxymethylene is heated and easily produces " zip mode " degraded, and the extremely incendive formaldehyde discharged can promote again the further degraded of polyoxymethylene; Secondly, soda acid easily causes polyoxymethylene catalyzed degradation.Therefore, extremely incendive polyoxymethylene Application Areas is greatly limited.High performance study on the modification is carried out to polyoxymethylene, develops the fire-retardant polyoxymethylene product with Good All-around Property, thus widen its range of application further.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide and there is good flame-retardance energy, a kind of expansion type flame-retarding polyformaldehyde composition that hardness is high.
In order to achieve the above object, the technical scheme that the present invention takes is:
A kind of expansion type flame-retarding polyformaldehyde composition, its component is by weight: polyoxymethylene 55 ~ 65 parts, encapsulated red phosphorus 5 ~ 15 parts, dipentaerythritol 5 ~ 15 parts, trimeric cyanamide 3 ~ 9 parts, ammonium polyphosphate 1 ~ 7 part, 3 ~ 9 parts, resol, urethane 1 ~ 7 part.
As preferred component, its component is by weight: polyoxymethylene 57 ~ 63 parts, encapsulated red phosphorus 7 ~ 13 parts, dipentaerythritol 7 ~ 13 parts, trimeric cyanamide 4 ~ 8 parts, ammonium polyphosphate 2 ~ 6 parts, 4 ~ 8 parts, resol, urethane 2 ~ 6 parts.
As preferred component, its component is by weight: polyoxymethylene 59 ~ 61 parts, encapsulated red phosphorus 9 ~ 11 parts, dipentaerythritol 9 ~ 11 parts, melamine phosphate 5 ~ 7 parts, ammonium polyphosphate 3 ~ 5 parts, 5 ~ 7 parts, resol, urethane 3 ~ 5 parts.
As better composition, its component is by weight: polyoxymethylene 60 parts, encapsulated red phosphorus 10 parts, dipentaerythritol 10 parts, trimeric cyanamide 6 parts, ammonium polyphosphate 4 parts, 6 parts, resol, urethane 4 parts.
Preparation method of composition: get after starting material are placed in the dry 1h of baking oven by weight, put into high mixer and be uniformly mixed 30min, then be placed in twin screw extruder and extrude pellet, high-temperature injection is shaping.
Beneficial effect of the present invention: using encapsulated red phosphorus, ammonium polyphosphate as acid source, post for becoming charcoal with resol, urethane, be inhale aldehyde agent to hold concurrently source of the gas with trimeric cyanamide, composite halogen-free expansion type flame-retarding polyoxymethylene product is constituted with polyoxymethylene, the limiting oxygen index(LOI) of product is high, thus there is good flame retardant resistance, and intensity is high, fire-retardant polyoxymethylene Application Areas is wide, use range is large.
Embodiment
Below in conjunction with specific embodiment, the present invention is further described.
Embodiment 1
First, taking each component is by weight: polyoxymethylene 55 parts, encapsulated red phosphorus 13 parts, dipentaerythritol 12 parts, trimeric cyanamide 9 parts, ammonium polyphosphate 1 part, 9 parts, resol, urethane 1 part.
Then, prepare fire-retardant polyformaldehyde composition: after starting material being placed in the dry 1h of baking oven, putting into high mixer and be uniformly mixed 30min, then be placed in twin screw extruder and extrude pellet, high-temperature injection is shaping.
Embodiment 2
First, taking each component is by weight: polyoxymethylene 58 parts, encapsulated red phosphorus 11 parts, dipentaerythritol 11 parts, trimeric cyanamide 7 parts, ammonium polyphosphate 3 parts, 7 parts, resol, urethane 3 parts.
Then, prepare fire-retardant polyformaldehyde composition: after starting material being placed in the dry 1h of baking oven, putting into high mixer and be uniformly mixed 30min, then be placed in twin screw extruder and extrude pellet, high-temperature injection is shaping.
Embodiment 3
First, taking each component is by weight: polyoxymethylene 60 parts, encapsulated red phosphorus 10 parts, dipentaerythritol 10 parts, trimeric cyanamide 6 parts, ammonium polyphosphate 4 parts, 6 parts, resol, urethane 4 parts.
Then, prepare fire-retardant polyformaldehyde composition: after starting material being placed in the dry 1h of baking oven, putting into high mixer and be uniformly mixed 30min, then be placed in twin screw extruder and extrude pellet, high-temperature injection is shaping.
Embodiment 4
First, taking each component is by weight: polyoxymethylene 63 parts, encapsulated red phosphorus 9 parts, dipentaerythritol 8 parts, trimeric cyanamide 5 parts, ammonium polyphosphate 5 parts, 5 parts, resol, urethane 5 parts.
Then, prepare fire-retardant polyformaldehyde composition: after starting material being placed in the dry 1h of baking oven, putting into high mixer and be uniformly mixed 30min, then be placed in twin screw extruder and extrude pellet, high-temperature injection is shaping.
Embodiment 5
First, taking each component is by weight: polyoxymethylene 65 parts, encapsulated red phosphorus 7 parts, dipentaerythritol 8 parts, trimeric cyanamide 3 parts, ammonium polyphosphate 7 parts, 3 parts, resol, urethane 7 parts.
Then, prepare fire-retardant polyformaldehyde composition: after starting material being placed in the dry 1h of baking oven, putting into high mixer and be uniformly mixed 30min, then be placed in twin screw extruder and extrude pellet, high-temperature injection is shaping.
It should be pointed out that above case is only the representational example of the present invention.Obviously, technical scheme of the present invention is not limited to above-described embodiment, can also have many sex change.
Claims (4)
1. an expansion type flame-retarding polyformaldehyde composition, is characterized in that, its component is by weight: polyoxymethylene 55 ~ 65 parts, encapsulated red phosphorus 5 ~ 15 parts, dipentaerythritol 5 ~ 15 parts, trimeric cyanamide 3 ~ 9 parts, ammonium polyphosphate 1 ~ 7 part, 3 ~ 9 parts, resol, urethane 1 ~ 7 part.
2. a kind of expansion type flame-retarding polyformaldehyde composition according to claim 1, it is characterized in that, its component is by weight: polyoxymethylene 57 ~ 63 parts, encapsulated red phosphorus 7 ~ 13 parts, dipentaerythritol 7 ~ 13 parts, trimeric cyanamide 4 ~ 8 parts, ammonium polyphosphate 2 ~ 6 parts, 4 ~ 8 parts, resol, urethane 2 ~ 6 parts.
3. a kind of expansion type flame-retarding polyformaldehyde composition according to claim 2, it is characterized in that, its component is by weight: polyoxymethylene 59 ~ 61 parts, encapsulated red phosphorus 9 ~ 11 parts, dipentaerythritol 9 ~ 11 parts, melamine phosphate 5 ~ 7 parts, ammonium polyphosphate 3 ~ 5 parts, 5 ~ 7 parts, resol, urethane 3 ~ 5 parts.
4. a kind of expansion type flame-retarding polyformaldehyde composition according to claim 2, it is characterized in that, its component is by weight: polyoxymethylene 60 parts, encapsulated red phosphorus 10 parts, dipentaerythritol 10 parts, trimeric cyanamide 6 parts, ammonium polyphosphate 4 parts, 6 parts, resol, urethane 4 parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510091135.8A CN104650534A (en) | 2015-02-28 | 2015-02-28 | Expansive type flame-retardant polyformaldehyde composition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510091135.8A CN104650534A (en) | 2015-02-28 | 2015-02-28 | Expansive type flame-retardant polyformaldehyde composition |
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| CN104650534A true CN104650534A (en) | 2015-05-27 |
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| CN201510091135.8A Pending CN104650534A (en) | 2015-02-28 | 2015-02-28 | Expansive type flame-retardant polyformaldehyde composition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107759965A (en) * | 2017-11-09 | 2018-03-06 | 上海应用技术大学 | A kind of fire-retardant polyformaldehyde of intumescent compounding flame retardant and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1810881A (en) * | 2006-03-08 | 2006-08-02 | 四川大学 | Prepn of polyformaldehyde material with polyurethane-base composite fire retardant |
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2015
- 2015-02-28 CN CN201510091135.8A patent/CN104650534A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1810881A (en) * | 2006-03-08 | 2006-08-02 | 四川大学 | Prepn of polyformaldehyde material with polyurethane-base composite fire retardant |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107759965A (en) * | 2017-11-09 | 2018-03-06 | 上海应用技术大学 | A kind of fire-retardant polyformaldehyde of intumescent compounding flame retardant and preparation method thereof |
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Application publication date: 20150527 |