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A kind of high-strength anti-warping polyolefin composite material and its preparation method

A composite material and polyolefin technology, which is applied in the field of high-strength anti-warping polyolefin composite material and its preparation field, can solve the problems of uneven glass fiber orientation, large difference in shrinkage rate, and reduction of polypropylene molding shrinkage rate, etc. Achieve the effect of improving warpage resistance, excellent warpage resistance, and reducing shrinkage differences

Active Publication Date: 2022-02-18
厦门德丰行塑胶工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, although the addition of glass fiber can significantly reduce the molding shrinkage of polypropylene, the glass fiber is prone to uneven orientation in the matrix, resulting in anisotropy of the part, which causes changes in the size of the part and shrinkage in the flow direction of the melt. There is a large difference between the shrinkage rate and the vertical shrinkage rate, which will cause warping and deformation of the parts and affect the assembly

Method used

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  • A kind of high-strength anti-warping polyolefin composite material and its preparation method

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Effect test

Embodiment 1

[0063] In terms of components by weight, the high-strength warpage-resistant polyolefin composite material of this embodiment includes the following components and parts by weight: 50 parts of homopolypropylene; 0.4 parts of zinc stearate; 2-hydroxyl-4- 0.2 parts of n-octyloxybenzophenone; 2 parts of nucleating agent masterbatch; 0.8 parts of high molecular weight silicone masterbatch; 12 parts of flat glass fiber; 1 part of maleic anhydride grafted polypropylene. in:

[0064] The length of the flat glass fiber in this embodiment is 3 mm, and its cross section is a rectangular structure with a length of 24 μm and a width of 6 μm.

[0065] The silicone content of the high molecular weight silicone masterbatch in this embodiment is 40%.

[0066] The nucleating agent masterbatch of the present embodiment is made up of maleic anhydride grafted polypropylene and nucleating agent, and the mass ratio of this nucleating agent is 3.0%, is made up of aluminum hydroxide, magnesium hydro...

Embodiment 2

[0073] In terms of components by weight, the high-strength warpage-resistant polyolefin composite material of this embodiment includes the following components and parts by weight: 90 parts of copolymerized polypropylene; 1 part of zinc stearate; 2-hydroxyl-4-n- 1 part of octyloxybenzophenone; 6 parts of nucleating agent masterbatch; 5 parts of high molecular weight silicone masterbatch; 45 parts of flat glass fiber; 6 parts of maleic anhydride grafted methacrylate containing organic silicon, ma The grafting rate of toic anhydride was 1.2%. in:

[0074] The length of the flat glass fiber in this embodiment is 5 mm, and its cross section is a rectangular structure with a length of 30 μm and a width of 8 μm.

[0075] The silicone content of the high molecular weight silicone masterbatch in this embodiment is 55%.

[0076] The maleic anhydride grafted organosilicon-containing methacrylate of the present embodiment is prepared by the following method:

[0077] Step 1: Weigh the...

Embodiment 3

[0089] In terms of components by weight, the high-strength warpage-resistant polyolefin composite material of this embodiment includes the following components and parts by weight: 60 parts of homopolypropylene; 0.6 parts of zinc stearate; 2-hydroxyl-4- 0.6 parts of n-octyloxybenzophenone; 4 parts of nucleating agent masterbatch; 3 parts of high molecular weight silicone masterbatch; 30 parts of flat glass fiber; 3 parts of maleic anhydride grafted polypropylene, maleic anhydride grafting ratio 1.0%. in:

[0090] The length of the flat glass fiber in this embodiment is 3 mm, and its cross section is a rectangular structure with a length of 28 μm and a width of 7 μm.

[0091] The silicone content of the high molecular weight silicone masterbatch in this embodiment is 48%.

[0092] The nucleating agent master batch of this embodiment is composed of isotactic polypropylene and acrylonitrile-styrene copolymer, and the mass ratio of the nucleating agent is 3.0%, and the nucleatin...

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Abstract

The invention relates to a high-strength anti-warping polyolefin composite material, comprising the following components and parts by weight: 50-90 parts of polyolefin resin; 0.4-1 part of heat stabilizer; 0.2-1 part of ultraviolet stabilizer; 2-6 parts of nucleating agent masterbatch; 0.5-5 parts of high molecular weight silicone masterbatch; 10-50 parts of flat glass fiber; 1-6 parts of compatibilizer. The compatibilizer is selected from maleic anhydride grafted polypropylene or maleic anhydride grafted silicone-containing methacrylate; the maleic anhydride graft ratio is 0.8%-1.2%. The molecular weight of the organosiloxane ultra-high molecular weight polymer in the high molecular weight silicone masterbatch is ≥1 million, and the silicone content is 40%-60%. The length of the flat glass fiber is 2-5 mm, and its cross section is a rectangular structure with a length of 20-32 μm and a width of 4-10 μm. The invention has excellent resin mechanical properties, so that the product has higher mechanical properties and anti-warping properties.

Description

technical field [0001] The invention relates to the technical field of polymer material modification, in particular to a high-strength warpage-resistant polyolefin composite material and a preparation method thereof. Background technique [0002] Commonly used polyolefin synthetic resins include polyethylene, polypropylene, ethylene vinyl acetate copolymer, ethylene methyl acrylate copolymer, ethylene ethyl acrylate copolymer, ethylene butyl acrylate copolymer, polystyrene, styrene ethylene butylene ethylene copolymer, styrene butadiene copolymer, maleic anhydride grafted ethylene, maleic anhydride grafted polypropylene, maleic anhydride grafted ethylene vinyl acetate, silane grafted polyethylene, silane grafted polypropylene, silane grafted Branched ethylene vinyl acetate, etc. Among them, polypropylene is a non-toxic, odorless, tasteless milky white high-crystalline general-purpose synthetic resin polymer with a density of only 0.9-0.91 g / cubic centimeter, which is current...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08L83/04C08L51/06C08K13/04C08K7/14C08K3/22C08K5/523C08K13/06C08K9/06C08K9/12C08K3/04C08J3/22
CPCC08J3/226C08L23/12C08L23/14C08J2323/14C08J2323/12C08L2205/025C08L2205/035C08L2201/02C08K2003/2224C08K2003/2227C08K2003/2296C08K2201/004C08K2201/011C08K2201/016C08J2483/04
Inventor 黄志勤周明广熊吉辉曾晓强
Owner 厦门德丰行塑胶工业有限公司