Crosslinked polyethylene foamed material and preparation method thereof

A technology of cross-linked polyethylene and polyethylene, which is applied in the field of polymer materials, can solve the problems of poor mutual solubility, achieve high tensile strength, highlight environmental protection, economic benefits, and good biodegradability

Active Publication Date: 2018-03-06
ZHEJIANG WANLI NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, polyurethane polyols have poor misci

Method used

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  • Crosslinked polyethylene foamed material and preparation method thereof
  • Crosslinked polyethylene foamed material and preparation method thereof

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preparation example Construction

[0035] Such as figure 1 Shown, the preparation method of this cross-linked polyethylene foam material may further comprise the steps:

[0036] The present application also provides a preparation method of the above-mentioned cross-linked polyethylene foam material, the preparation method comprising the following steps:

[0037] (1) Polybio-oil polyether polyol synthesis stage: 80-95 parts by weight of poly-bio-oil and 5-20 parts by weight of ethanolamine are formed by transesterification at 150-250°C for 4-12 hours under nitrogen atmosphere Polyol initiator; then, continuously feed propylene oxide at 80-160°C for polymerization reaction, and obtain polybio-oil polyether polyol after polymerization for 4-24 hours;

[0038] (2) Polyethylene foam preparation stage: Weigh 65-90 parts by weight of polyethylene, 5-30 parts by weight of polybio-oil polyether polyol, 5-30 parts by weight of thermoplastic elastomer, and 0.5-7 parts by weight of foam agent, 0.5 to 4 parts by weight se...

Embodiment 1

[0045] Step 1 Synthesis of polypeanut oil polyether polyol

[0046] 100 parts by weight of peanut oil and 0.5 parts by weight of azobisisobutyronitrile were placed in the reactor, stirred and mixed evenly, and then the air in the reactor was replaced by nitrogen gas. In a nitrogen atmosphere, the reactor was heated to 310°C, and the peanut oil and azobisisobutyronitrile were polymerized for 8 hours to obtain polypeanut oil;

[0047] Next, 90 parts by weight of polypeanut oil and 10 parts by weight of diethanolamine were placed in the reactor for stirring and mixing, and then the air in the reactor was replaced by nitrogen gas. Heating to about 180°C in a nitrogen atmosphere for transesterification reaction for about 8 hours, forming a polyol initiator; finally, continuously feeding propylene oxide at 135-140°C for polymerization reaction, maintaining the pressure of the reaction system at about 0.8MPa , Polymerized for 12h to obtain polypeanut oil polyether polyol.

[0048] ...

Embodiment 2

[0061] Step 1 Synthesis of Poly-Rapeseed Polyether Polyols

[0062] 100 parts by weight of rapeseed oil and 0.8 parts by weight of azobisisobutyronitrile were placed in the reactor, stirred and mixed evenly, and then the air in the reactor was replaced by nitrogen gas. In a nitrogen atmosphere, the reactor was heated to 320°C, and rapeseed oil and azobisisobutyronitrile were polymerized for 18 hours to obtain polyester rapeseed oil;

[0063] Next, 95 parts by weight of rapeseed oil and 5 parts by weight of diethanolamine were placed in the reactor for stirring and mixing, and then the air in the reactor was replaced by nitrogen gas. After heating to about 160°C in a nitrogen atmosphere for transesterification reaction for about 12 hours, a polyol initiator is formed; finally, propylene oxide is continuously introduced at about 130°C for polymerization reaction, and the pressure of the reaction system is maintained at about 0.7MPa. Polymerized for 10 hours to obtain poly-rapee...

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Abstract

The embodiment of the invention provides a crosslinked polyethylene foamed material which is prepared from the following components in parts by weight: 65-90 parts of polyethylene, 5-30 parts of polymerized bio-oil polyether polyol, 5-30 parts of a thermoplastic elastomer, 0.5-7 parts of a foaming agent, 0.5-4 parts of a sensitizer and 0.5-5 parts of an antioxidant. The crosslinked polyethylene foamed material has good properties such as longitudinal tensile strength greater than 3.5MPa, a longitudinal elongation rate greater than 200%, transverse tensile strength greater than 1.5MPa, a transverse elongation rate greater than 350%, a 25% compression ratio less than 80KPa, and the like, and meanwhile the apparent density of the foamed material is 0.2-0.5g/cm<3>. The crosslinked polyethylenefoamed material can be used as a sealing buffer or adhesive substrate of a window and a touch screen of an electronic product.

Description

technical field [0001] The invention relates to a cross-linked polyethylene foam material and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Radiation cross-linked polyethylene foam is a new type of foamed plastic with a closed-cell structure between soft (polyurethane) and rigid (polystyrene) foams, with superior strength, toughness, elasticity, and flexibility. , Abrasion resistance, chemical corrosion resistance, low temperature resistance and good insulation, etc., can be used as good insulation, heat insulation, shockproof and buoyancy materials, and are widely used in various fields such as industry, agriculture, construction and transportation. [0003] High tensile strength polyethylene foam products are widely used in cushioning materials, packaging, tapes and other applications, and with the improvement of product quality requirements, higher requirements are put forward for product tensile strengt...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L71/02C08L23/16C08K5/098C08K5/134C08J9/10
CPCC08J9/103C08J9/105C08J9/107C08J2203/04C08J2323/06C08J2409/00C08J2409/06C08J2423/08C08J2423/16C08J2471/02C08K5/098C08K5/1345
Inventor 张轩郭枫梁学正
Owner ZHEJIANG WANLI NEW MATERIALS TECH CO LTD
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