Polyformaldehyde foam composition, preparation method thereof, and structural foam material containing polyformaldehyde foam composition

A technology of polyoxymethylene and composition, which is applied in the field of foam composition and its preparation, can solve the problems of poor thermal stability of polyoxymethylene, inability to form uniform cells, restriction of foaming method, etc., and achieve light weight and strong usability , the effect of uniform cell distribution

Active Publication Date: 2016-07-20
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although polyoxymethylene has the above advantages, its own melt strength is low and it cannot form uniform cells, so there is no suitable method for foaming
In addition, the thermal stability of polyoxymethylene is also poor during processing, so the choice of foaming method is further restricted

Method used

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  • Polyformaldehyde foam composition, preparation method thereof, and structural foam material containing polyformaldehyde foam composition
  • Polyformaldehyde foam composition, preparation method thereof, and structural foam material containing polyformaldehyde foam composition

Examples

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preparation example Construction

[0039] The present invention also provides the preparation method of polyoxymethylene foam composition of the present invention, it comprises:

[0040] 1) melt-blending and granulating the foamable polymer, foaming agent and optional crosslinking agent, chain extender and / or processing aid with polyoxymethylene to obtain a foamable polyoxymethylene masterbatch,

[0041] 2) Foaming the expandable polyoxymethylene masterbatch obtained in step 1) to obtain the polyoxymethylene foam composition of the present invention.

[0042] In the present invention, the step 1) of preparing expandable polyoxymethylene masterbatch is preferably carried out in two steps, and in this case, the method of the present invention comprises:

[0043]1-1) melt blending and granulating the foamable polymer, foaming agent and optional crosslinking agent to obtain foam masterbatch;

[0044] 1-2) melt-blending and granulating the foaming masterbatch obtained from step 1) with polyoxymethylene and optional...

Embodiment

[0065] Raw Materials and Equipment

[0066] Polyoxymethylene (POM), MC90G, density 1.4g / cm 3 , purchased from Shenhua Ningxia Coal Group Coal Chemical Branch;

[0067] Ethylene-octene copolymer (POE), ENGAGE8150 series, purchased from U.S. Dow Chemical Company;

[0068] High-density polyethylene (HDPE), 5000S, purchased from Daqing Petrochemical Company;

[0069] Ethylenepropylene diene monomer (EPDM), 745P, purchased from U.S. Dow Chemical;

[0070] Polyurethane (PU), WHT-1570IC, purchased from Yantai Wanhua Polyurethane Co., Ltd.;

[0071] Azodicarbonamide, AC blowing agent, purchased from Jinan New Times Chemical Co., Ltd.;

[0072] Dicumyl peroxide (DCP), cross-linking agent, purchased from acros company;

[0073] Diisocyanate (MDI), purchased from AlfaAesar company;

[0074] Talc powder (TALC), sweet-scented osmanthus brand, mesh number: 2500 mesh, density: 2.8g / cm 3 , purchased from Guangxi Longguang Talc Development Co., Ltd.;

[0075] Antioxidant, Irganox245 ...

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Abstract

The invention relates to a polyformaldehyde foam composition, a preparation method thereof, a structural foam material containing the polyformaldehyde foam composition, and a use of the polyformaldehyde foam composition and the structural foam material. The polyformaldehyde foam composition mainly includes polyformaldehyde, a foamable polymer and a foaming agent. The polyformaldehyde foam composition has the advantages of uniform distribution of cells, light weight, excellent comprehensive mechanical performances and high thermal deformation temperature.

Description

technical field [0001] The invention relates to a foam composition and a preparation method thereof, in particular to a polyoxymethylene foam composition and a preparation method thereof. The present invention also relates to structural foams comprising the polyoxymethylene foam compositions of the present invention. Background technique [0002] As a sandwich structure of various composite materials, structural foam materials are mainly used to increase stiffness and reduce weight. Structural foam also has the characteristics of low water absorption and good sound and heat insulation. Therefore, it has become an ideal material for fields requiring high strength and low density, and is widely used in wind power generation, rail transit, ships, aerospace, building energy conservation and other fields. [0003] At present, structural foam materials are mainly based on plastics (PVC, PP, PET, etc.), which can be used as core materials to increase stiffness and reduce weight b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/02C08L23/08C08L23/06C08L23/16C08L75/04C08K13/02C08K5/14C08K5/29C08K3/34C08K3/22C08J9/10C08J3/22
Inventor 孙小杰梁文斌马伊张寅灵赖世燿
Owner CHNA ENERGY INVESTMENT CORP LTD
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