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Halogen-free flame-retardant polyformaldehyde aggregate and production process thereof

A technology of polyoxymethylene and pellets is applied in the field of flame retardant polyoxymethylene materials, which can solve the problems of poor flame retardant effect, and achieve the effects of reducing the side effect of flame retardant zipper, improving drying effect, and reducing formaldehyde decomposition and release.

Pending Publication Date: 2022-07-22
安徽银隆塑业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, CN102924862A has prepared modified materials containing chlorinated paraffin, tri(chloroisopropyl) phosphate, etc., but the actual flame retardant effect is not good

Method used

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  • Halogen-free flame-retardant polyformaldehyde aggregate and production process thereof
  • Halogen-free flame-retardant polyformaldehyde aggregate and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The rotating speed of the extruder is 60 rpm, the 300-type gantry pelletizer, the water temperature of the water tank is 16 ° C, the first step, by weight, is to mix the lime nitrogen and magnesium hydroxide that account for 10wt% of the weight of Yuejiang TY-250 magnesium hydroxide, Obtain 15 parts of magnesium hydroxide, wherein lime nitrogen is purchased from Nanjing He Yixin fertilizer lime nitrogen powder; Second step, by weight, select FORMOCON FM090 copolymerized polyoxymethylene pellets, and then polyoxymethylene: 63.5 parts, Weifang Weidong Chemical FR-NP melamine polyphosphate: 6 parts, 4 parts of basic sodium and aluminum carbonate, processing aids: 1.5 parts, processing aids are 0.75 parts of antioxidant 2246 and 0.75 parts of UV-531, the remaining phosphorus- The nitrogen-based flame retardant is 10 parts, and the total amount of the above components is 85 parts; the third step, mixing materials: weighed magnesium hydroxide and polyoxymethylene, melamine pol...

Embodiment 2

[0031]The speed of the extruder is 50rpm, the water temperature of the stainless steel water tank is 15°C, and the 300-type gantry pelletizer. The first step, calculated in parts by weight, will account for 5wt% of the weight of Yuejiang TY-250 magnesium hydroxide. Lime nitrogen and magnesium hydroxide Mix, obtain 20 parts of magnesium hydroxide, wherein lime nitrogen is purchased from Nanjing He Yixin fertilizer lime nitrogen powder; The second step, by weight, will select co-formaldehyde M90LV DURACON polyformaldehyde again: 57 parts, polyphosphoric acid Melamine: 10 parts, basic sodium aluminum carbonate 7 parts, processing aid: 0.5 part, the processing aid is 0.5 part of antioxidant BHT, the rest is phosphorus-nitrogen flame retardant 5.5 parts, the total amount of the above components The third step, mixing materials: the weighed magnesium hydroxide and polyoxymethylene, KEMI KM-C04 melamine polyphosphate, phosphorus-nitrogen flame retardant, basic sodium aluminum carbonat...

Embodiment 3

[0033] The copolymerized polyoxymethylene in Example 2 was replaced with DuPont homopolymer Delrin 900P polyoxymethylene, and the remaining steps were the same as those in Example 2, marked as 3#.

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Abstract

The invention provides halogen-free flame-retardant polyformaldehyde granules and a production process thereof, and belongs to the technical field of flame-retardant polyformaldehyde materials, lime nitrogen is mixed with magnesium hydroxide, so that the water content in a mixed material is reduced, the relative amount of formaldehyde released is reduced, non-combustible water vapor, carbon dioxide and the like are increased, the combustion of polyformaldehyde is retarded, and the flame-retardant effect is improved. By adding triethanolamine to stabilize the tail end of a molecular chain, inactivate the tail end of the molecular weight and reduce the decomposition and release of formaldehyde, a compound intumescent flame retardant system with melamine polyphosphate, basic sodium aluminum carbonate and a phosphorus-nitrogen flame retardant as main bodies is designed, and through the nitrogen-phosphorus synergistic compound intumescent flame retardant system and a synergistic charring agent system, the flame retardant property of the flame retardant is improved. Meanwhile, a formaldehyde absorption and stabilization system is matched, the flame retardant property can reach UL94-V0 level, the raw materials are easy to obtain, the cost is relatively low, and the halogen-free flame-retardant polyformaldehyde granule has a certain economic added value and can be applied to flame-retardant polyformaldehyde spare and accessory parts in the fields of fire fighting, petrifaction, metallurgy and the like, such as fireproof zippers in fireproof and flame-retardant clothes.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant polyoxymethylene materials, in particular to a production process of halogen-free flame-retardant polyoxymethylene pellets. Background technique [0002] The quality of the zipper produced with polyoxymethylene as the chain teeth is relatively high, and it is called a new type of plastic-steel zipper. Polyoxymethylene has excellent self-lubrication and wear resistance, and the zipper made of it has good performance. Due to the influence of decabromodiphenyl ether and hexabromocyclododecane being listed as persistent organic pollutants, the development of halogen-based flame retardants is greatly restricted. Halogen-free, low-smoke, low-toxic environmentally friendly engineering plastic products have always been the goal that people pursue. Polyoxymethylene is an engineering plastic with excellent comprehensive properties, which is widely used in electronics, electrical appliances and aut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/04C08L59/02C08K3/22C08K3/28C08K5/529C08K3/26C08K5/435C08K3/32C08K5/17C08K5/5399C08K13/02
CPCC08K3/22C08K3/28C08K5/529C08K3/26C08K5/435C08K3/32C08K5/17C08K5/5399C08K13/02C08K2003/2224C08K2003/322C08L2201/02C08L2201/22C08L59/04C08L59/02
Inventor 程春银
Owner 安徽银隆塑业科技有限公司