Pre-expanded beads of flame-retardant polyolefin resin and molded object thereof by in-mold foaming

A technology of polyolefin resin and pre-expansion, which is applied in the field of in-mold foam molding products and flame-retardant polyolefin resin pre-expanded particles, which can solve the problem of foaming moldability and mechanical strength decline, pre-expansion Particle fusion and bonding obstacles, no record of application, etc., to achieve good flame retardancy

Inactive Publication Date: 2007-04-11
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no record about the application of these compounds to polyolefin resin pre-expanded particles and their in-mold foam-molded products.
The polyolefin resin pre-expanded particles are filled into the mold, heated with steam, etc., and fused, thereby foaming into the desired shape in the mold, but when the moldability of the pre-expanded particles is poor, then The value of the industry will drop significantly
It is known that additives compounded in polyolefin resins have an influence on the shape and size of cells, the combination of cells, etc., and the formation of cells, and that additives may cause foaming in the mold due to continuous foaming or miniaturization of cells. Decrease in formability and mechanical strength, occurrence of color spots, and failure of fusion bonding of pre-expanded particles during in-mold foam molding, etc.
Japanese Unexamined Patent Publication No. 11-315067 does not disclose at all the discovery of polyolefin resin pre-expanded particles and their application to in-mold foam-molded products

Method used

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  • Pre-expanded beads of flame-retardant polyolefin resin and molded object thereof by in-mold foaming
  • Pre-expanded beads of flame-retardant polyolefin resin and molded object thereof by in-mold foaming
  • Pre-expanded beads of flame-retardant polyolefin resin and molded object thereof by in-mold foaming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10 and comparative example 1

[0115] With ethylene-propylene random copolymer (ethylene content rate is 2.5% by weight), MI=6.0g / 10 minutes) 100 parts, and by chemical formula (3):

[0116] wxya 2 CH 2 CH 2 NRCH 2 CH 2 NHCH 2 CH 2 CH 2 NHR (3)

[0117] (In the formula, R represents by the following formula:

[0118]

[0119] The sterically hindered phenolic ether flame retardant (trade name: CGL116, チバペスペシヤルテイイラミカルズ (Ciba Specialty Chemicals)) and the carbon black as the colorant are mixed according to the amount shown in Table 1, and then a single After kneading by a shaft extruder, it was pelletized to produce resin pellets (1.8 mg / pellet). The melting point of the obtained polyolefin resin pellets was 147.3°C.

[0120] 100 parts of this resin particle and 9.3 parts of isobutane and dispersant (containing 2 parts of powdery basic tricalcium phosphate and 300 parts of water of n-paraffin sodium sulfonate 0.05 part) are packed together in 10 liters of pressure vessels, The inside of the contai...

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Abstract

Flame retardant polyolefin pre-expanded particles made of a resin composition comprising a polyolefin resin and a sterically hindered amine ether flame retardant, which can be molded with good moldability to give in-mold foamed articles which have an excellent flame resistance and do not generate harmful gas at the time of burning.

Description

technical field [0001] The present invention relates to heat insulation materials, shockproof packaging materials, revolving cargo boxes, core materials for vehicle shock absorbers, electrical and electronic product parts, etc., especially relates to flame-retardant polyolefin resin pre-foaming for manufacturing electrical and electronic product parts Particles, and an in-mold foam-molded product obtained by foam-molding the flame-retardant polyolefin resin pre-expanded particles in a mold. Background technique [0002] In-mold foam molding products of polypropylene have excellent chemical resistance, heat resistance, impact resistance, and deformation recovery rate after compression compared with polystyrene in-mold foam molding products, so they are widely used Used as core materials for shock absorbers, side impact pads, automotive components for floor materials, shockproof packaging materials, turnover boxes, etc. [0003] However, foamed molded articles generally obtai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/18C08J9/228C08J9/00C08J9/16C08K5/3492
CPCC08J2323/10C08J2323/02C08K5/34926C08J9/0028C08J9/16Y10S521/907C08J2203/14C08L23/02
Inventor 约翰·B·斯图尔特史蒂文·C·斯卡克荻田哲也山口武马岩本友典
Owner KANEKA CORP
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