Halogen-free flame-retardant polypropylene foam material and preparation method thereof

A technology of flame-retardant polypropylene and foam materials, which is applied in the field of polymers and can solve problems such as unreachable, high flame-retardant grades, etc.

Active Publication Date: 2013-01-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nitrogen-based flame retardants are represented by melamines and triazines, but they cannot achieve high flame-retardant grades within the thickness of polypropylene insulation sheets within the range of 0.125-0.75mm

Method used

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  • Halogen-free flame-retardant polypropylene foam material and preparation method thereof
  • Halogen-free flame-retardant polypropylene foam material and preparation method thereof
  • Halogen-free flame-retardant polypropylene foam material and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0090] Preparation of High Melt Strength Polypropylene:

[0091] The polymerization reaction was carried out on a polypropylene pilot plant. Its main equipment includes prepolymerization reactor, first loop reactor and second loop reactor. Polymerization method and steps are as follows:

[0092] HMSPP101

[0093] (1) Prepolymerization reaction:

[0094] The main catalyst (titanium-containing solid catalyst active component) is obtained by the method described in Example 1 of Chinese Patent CN93102795, its Ti content: 2.4wt%, Mg content 18.0wt%, di-n-butyl phthalate content: 13wt %.

[0095]The main catalyst, co-catalyst (triethylaluminum), and the first external electron donor (dicyclopentyldimethoxysilane, DCPMS) were pre-contacted at 10°C for 20 minutes, and then continuously added to the pre-polymerization reactor for pre-polymerization. In the polymerization reactor, the pre-polymerization is carried out in the environment of the propylene liquid phase body, the tempe...

Embodiment 1

[0109] Preparation of hydrotalcite

[0110] Step A: 53.0g (0.5mol) of solid Na 2 CO 3 and 100.0 g (2.5 mol) of solid NaOH were dissolved in 225 mL of H 2 O, another 101.7g (0.5mol) of solid MgCl 2 6H 2 O and 120.7 g (0.5 mol) of solid AlCl 3 6H 2 O dissolved in 225 mL H 2 In O, put alkali solution and salt solution in the reactor at room temperature to nucleate rapidly, cool and crystallize the obtained slurry at 100°C, place it for 10h, centrifuge, wash the obtained sample until the pH value is less than 8, and dry at 70°C 24h, get Mg-Al-HCO 3 LDHs, its Mg 2+ / Al 3+ =2:1.

[0111] Step B: Weigh 35.8g (0.1mol) Na 2 HPO 4 12H 2 O, prepared as 1.0M phosphate solution.

[0112] Step C: Add 9.6 g (0.02 mol) of LDHs obtained in Step A into a container containing 100 mL of deionized water, and stir magnetically at room temperature to obtain a hydrotalcite suspension.

[0113] Step D: While stirring, add the phosphate solution to the LDHs suspension, and then add 0....

Embodiment 2

[0116] Preparation method as described in embodiment 1, process parameter changes as follows:

[0117] The ratio of sheet extrusion is updated to 100:10:5:2.

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PUM

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Abstract

The invention discloses a halogen-free flame-retardant polypropylene foam material and a preparation method thereof. The foam material comprises the following blended components in parts by weight: 100 parts of high-melt-strength polypropylene, 10-15 parts of phosphorus-series houghite and 3-15 parts of a foaming agent. The method for preparing the halogen-free flame-retardant polypropylene foam material comprises the following step of: melting according to the using amounts, blending and foaming. The foam material disclosed by the invention has the advantages of consistence with the environmental protection requirement, recyclability, non-crosslinking, uniform foam holes, high physical heat resistance, low production cost, smooth surfaces and suitability for continuous mass production.

Description

technical field [0001] The invention relates to the field of macromolecules, in particular to a halogen-free flame-retardant polypropylene foam material and a preparation method thereof. Background technique [0002] Foamed plastic refers to a resin-based microporous material with numerous bubbles inside, and can also be regarded as a composite material filled with gas. There are many kinds of foamed plastics. Because they contain a large number of bubbles, they have the advantages of light weight, heat insulation, sound insulation, cushioning, high specific strength, and low price. They are widely used in daily necessities, packaging, industry, agriculture, transportation, military industry, aerospace, etc. Widely used in industry and other fields. In terms of performance, compared with polyethylene, polystyrene, and polyurethane foamed materials, polypropylene (PP) foamed material is a highly crystalline polymer / gas composite material with excellent performance. Superior...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K3/32C08F110/06C08F4/646C08J9/04C08J9/10
Inventor 郭鹏吕明福张师军高达利吕芸杨庆泉徐萌徐凯陈力
Owner CHINA PETROLEUM & CHEM CORP
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