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Thermoplastic elastomer material for secondary overmolding and preparation method of thermoplastic elastomer material

A thermoplastic elastomer, secondary injection bonding technology, applied in the field of thermoplastic elastomer materials and their preparation, can solve the problems of insufficient coating, poor adhesion, low peel strength, etc., and achieve good interface compatibility and good elasticity , Improve the effect of peel strength

Inactive Publication Date: 2017-07-07
SUNGALLON PLASTICS SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the current thermoplastic elastomer materials have disadvantages such as poor adhesion and insufficient coating of materials containing polar groups by secondary injection, resulting in low peel strength.

Method used

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  • Thermoplastic elastomer material for secondary overmolding and preparation method of thermoplastic elastomer material
  • Thermoplastic elastomer material for secondary overmolding and preparation method of thermoplastic elastomer material
  • Thermoplastic elastomer material for secondary overmolding and preparation method of thermoplastic elastomer material

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Experimental program
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preparation example Construction

[0043] The above-mentioned preparation method for the thermoplastic elastomer material of secondary shot bonding, comprises the following steps:

[0044] S110. In terms of parts by mass, 55-95 parts of block copolymer and 2-35 parts of mineral oil are evenly stirred, and left for at least 2 days to obtain the first mixture.

[0045] In one embodiment, the stirring is carried out in a horizontal mixer, and the stirring rate is 30r / min-120r / min.

[0046] In one of the embodiments, stirring is performed for 5 minutes to 15 minutes.

[0047] In one of the embodiments, it is placed for 2 to 4 days.

[0048] In one embodiment, 55-90 parts of block copolymer and 2-35 parts of mineral oil are mixed well and the package is sealed for at least 2 days.

[0049] S120. Stir and mix the first mixture with 5-40 parts of EPDM rubber-polypropylene alloy thermoplastic elastomer and 1-20 parts of maleic anhydride graft to obtain a second mixture.

[0050] In one embodiment, the stirring is ca...

Embodiment 1

[0063] Put 9 parts by weight of SEBS YH503T and 63 parts by weight of SBS PB5502 into a horizontal mixer, uniformly add 5 parts by weight of mineral oil 150N, stir for 10 minutes to obtain the first mixture, pack the first mixture, and place it for 2 days.

[0064] Put the first mixture into a horizontal mixer, add 5 parts by weight of EPDM rubber-polypropylene alloy thermoplastic elastomer GP610-55, and 13 parts by weight of thermoplastic styrene-butadiene rubber-maleic anhydride graft FG1901, stir 5 min to get the second mixture.

[0065] Add 5 parts by weight of heavy calcium carbonate, 0.1 part by weight of antioxidant 168, 0.05 part by weight of antioxidant 1076, and 0.15 part by weight of erucamide into the second mixture, stir for 10 minutes until uniformly mixed, and obtain a premix.

[0066] Put the premix in a co-rotating twin-screw extruder to extrude and pelletize to obtain a thermoplastic elastomer material for secondary shot bonding.

Embodiment 2

[0068] Put 50 parts by weight of SBS PB5502 and 10 parts by weight of SBS 3546 into a horizontal mixer, evenly add 2 parts by weight of mineral oil KNH4006, stir for 10 minutes to obtain the first mixture, pack the first mixture, and place it for 5 days.

[0069] Put the first mixture into a horizontal mixer, add 20 parts by weight of EPDM rubber-polypropylene alloy thermoplastic elastomer GP610-55, and 13 parts by weight of thermoplastic styrene-butadiene rubber-maleic anhydride graft FG1901, stir 5 min to get the second mixture.

[0070] Add 5 parts by weight of heavy calcium carbonate, 0.1 part by weight of antioxidant 168, 0.05 part by weight of antioxidant 1076, and 0.2 parts by weight of lubricant erucamide into the second mixture, stir for 10 minutes until uniformly mixed, and obtain a premix.

[0071] Pour the premix into the hopper of the co-rotating twin-screw extruder, shear and disperse through the co-rotating twin-screw, pelletize, pass through a vibrating sieve, ...

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Abstract

The invention relates to a thermoplastic elastomer material for secondary overmolding and a preparation method of the thermoplastic elastomer material. The thermoplastic elastomer material for secondary overmolding is prepared from the following components in parts by mass: 55 to 95 parts of segmented copolymer, 2 to 35 parts of mineral oil, 5 to 40 parts of ethylene propylene diene terpolymer-polypropylene alloy thermoplastic elastomer, 1 to 20 parts of maleic anhydride-grafted polymer and 5 to 20 parts of mineral filler, wherein the segmented copolymer is selected from at least one of a styrene-ethylene-butadiene-styrene block copolymerized elastomer, a styrene-butadiene-styrene block copolymer and a styrene-butadiene block copolymer. The thermoplastic elastomer material for secondary overmolding is higher in stripping strength.

Description

technical field [0001] The invention relates to a thermoplastic elastomer material for secondary injection bonding and a preparation method thereof. Background technique [0002] Thermoplastic polyester PET, PBT, PC, PA, POM, PS and their modified products such as ABS, K glue, HIPS and other general-purpose engineering plastics are in huge demand in national production, and the corresponding products need to be reprocessed to varying degrees. Injection bonding to meet the different hand feel requirements of the product. [0003] For polar group-containing materials such as PC and ABS, and thermoplastic polyesters such as PET and PBT, which contain both polar groups and certain crystalline materials, the thermoplastic elastomer system of thermoplastic polyurethane (TPU) system is usually used. Carry out secondary shot bonding. [0004] Both POM and PA are linear polymer materials with polar groups on the molecular chain, no side chains on the main molecular chain, high dens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L51/04C08L23/16C08L23/12C08K13/02C08K3/26C08K5/134C08K5/526C08K3/36
CPCC08L53/02C08L2205/02C08L2205/025C08L2205/035C08L2207/04C08L53/025C08L51/04C08L23/16C08L23/12C08K13/02C08K2003/265C08K5/1345C08K5/526C08K3/36
Inventor 黄喜梅李文星李萍赵敬东邱廷模
Owner SUNGALLON PLASTICS SHENZHEN CO LTD
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