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Low temperature impact resistant nylon flexibilizer and preparation method of low temperature impact resistant nylon flexibilizer

A technology of toughening agent and low temperature resistance, which is applied in the field of nylon toughening agent and its preparation, which can solve the problems of product yellowing, mechanical property decline, difficulty in pulling strands, pelletizing, etc., and achieve high grafting rate and accurate feeding , The effect of reducing the amount of gel

Inactive Publication Date: 2012-07-11
SHANGHAI SUNNY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simple POE is grafted through monomers, and cross-linking is easy to occur during the grafting reaction in the presence of peroxides, and the product turns yellow, and it is not easy to pull strips and pelletize. In addition to impact properties, other mechanical properties have dropped significantly, which reduces the scope of use of graft tougheners

Method used

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  • Low temperature impact resistant nylon flexibilizer and preparation method of low temperature impact resistant nylon flexibilizer
  • Low temperature impact resistant nylon flexibilizer and preparation method of low temperature impact resistant nylon flexibilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh the following components in parts by weight: 70 parts of POE resin (DOW, ENGAGE 8180), 20 parts of CPP (Shanghai Secco, S2040), 10 parts of LLDPE (Korea SK, JL210), and the graft monomer is maleic anhydride 2 The initiator is 0.1 part of bis(tert-butylperoxyisopropyl)benzene, 0.3 part of PE wax, 0.3 part of 1010 antioxidant, and 0.2 part of wax oil.

[0040] Put the other components except the initiator into the high-speed mixer according to the proportion and mix them for 8 minutes, then add them into the twin-screw extruder after metering through the main feeder, and add the initiator into the extruder after metering through the side feeder , the screw temperature of each section of the extruder from the feed port to the head is set between 100°C and 200°C, and the mixed material is melted and plasticized, kneaded and mixed, extruded from the head, drawn, cooled, pelletized, Dry to obtain the product.

Embodiment 2

[0042] Weigh the following components in parts by weight: 80 parts of POE resin (DOW, ENGAGE 8150), 15 parts of CPP (Shanghai Secco, S2040), 5 parts of LLDPE (Korea SK, JL210), and the graft monomer is methacrylic acid shrink 3 parts of glycerides, 0.15 parts of initiator consisting of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane and dicumyl peroxide, 0.4 parts of sodium stearate, 1010 and 168 for 0.4 part of antioxidant, 0.1 part of white oil.

[0043] Put the other components except the initiator into the high-speed mixer according to the proportion and mix them for 10 minutes, then add them into the twin-screw extruder after metering through the main feeder, and add the initiator into the extruder after metering through the side feeder , the screw temperature of each section of the extruder from the feeding port to the machine head is set between 80°C and 180°C, and the mixed material is melted and plasticized, kneaded and mixed, extruded from the machine head, drawn, cooled,...

Embodiment 3

[0045] Weigh the following components by weight: 60 parts of POE resin (DOW, ENGAGE 8150), 25 parts of CPP (Shanghai Secco, S2040), 15 parts of LLDPE (Korea SK, JL210), and the grafting monomers are maleic anhydride and 3 parts of glycidyl methacrylate (1:2), the initiator consists of 0.2 parts of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane, 0.4 parts of sodium stearate, 1010 and 168 It is 0.4 parts of antioxidant and 0.2 parts of white oil.

[0046] Put the other components except the initiator into the high-speed mixer according to the proportion and mix them for 5 minutes, then add them into the twin-screw extruder after metering through the main feeder, and add the initiator into the extruder after metering through the side feeder , the screw temperature of each section of the extruder from the feed port to the head is set between 110°C and 220°C, and the mixed material is melted and plasticized, kneaded and mixed, extruded from the head, drawn, cooled, pelletized, Dry to ...

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Abstract

The invention relates to a low temperature impact resistant nylon flexibilizer and a preparation method of the low temperature impact resistant nylon flexibilizer. The low temperature impact resistant nylon flexibilizer comprises the following components in parts by weight: 50-95 parts of ethylene-alpha-octylene copolymer resin, 4-40 parts of polypropylene copolymer, 1-30 parts of linear low density polyethylene, 0.5-10 parts of graft monomer, 0.01-2 parts of initiator, 0.1-1 part of lubricator, 0.1-1 part of antioxidant and 0.1-2 parts of liquid additive. The preparation method of the low temperature impact resistant nylon flexibilizer comprises the steps of: mixing the above components except for the initiator, and adding into a double-screw extruder; laterally feeding and metering the initiator, and adding into the extruder; and extruding and pelletizing to obtain the low temperature impact resistant nylon flexibilizer as a product. The graft ratio of the flexibilizer is increased and the gel content of the flexibilizer is reduced by the lateral feeding technology; after the flexibilizer is applied to nylon (nylon 6, nylon 66), the flexibilizer is good in comprehensive performance and more excellent in low temperature impact performance; and the notch impact strength of the flexibilizer can reach 600J / m at a temperature of -30 DEG C, so that the flexibilizer can be applied to the fields of auto accessories and bumpers, railway equipment and the like under low temperature resistance.

Description

technical field [0001] The invention relates to a nylon toughening agent and a preparation method thereof, in particular to a low-temperature impact-resistant nylon toughening agent and a preparation method thereof. Background technique [0002] Nylon (PA) ranks first among the five general-purpose engineering plastics. It is flexible, wear-resistant, high in mechanical strength, good in heat resistance, and excellent in flow processability. At the same time, nylon is a crystalline polymer that will There is a sharp yield point, and after passing the yield point, the stress will gradually increase with the increase of the strain. Therefore, unmodified nylon cannot be used in the fields of automotive interior and exterior trims, bumpers, and railway equipment, and its ductility is required. , Notched impact strength and low temperature toughness were modified. [0003] Ethylene-α-octene copolymer (POE) is a new type of metallocene-catalyzed polyolefin thermoplastic elastomer...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L51/06C08F255/02B29B9/06B29C47/92B29C48/92
CPCB29C48/0022B29C48/04B29C48/92B29C2948/92676B29C2948/92704B29C2948/92828B29C2948/92885B29C2948/92895
Inventor 汤俊杰杨涛孟成铭
Owner SHANGHAI SUNNY
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