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Polypropylene-toughened insulation composite and preparation method thereof

A composite material, polypropylene technology, applied in the field of plastics, can solve the problems of unsuitable for buried pipelines and underwater pipeline insulation, low engineering construction efficiency, insufficient water resistance, etc., to achieve the improvement of elongation at break and impact strength, Increased synergistic effects, improved compatibility effects

Inactive Publication Date: 2019-02-19
安庆市泽烨新材料技术推广服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN103819644A discloses "a pipeline insulation material with good fluidity and its preparation method". The pipeline insulation material is polyurethane foam. Although its insulation performance is excellent, its strength is too low and its water resistance is insufficient. It is used for the insulation of buried pipelines and underwater pipelines; in addition, the preparation of polyurethane foam insulation layers requires prefabricated molds, resulting in low construction efficiency

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  • Polypropylene-toughened insulation composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of modified glass microspheres comprises the following steps:

[0026] 1) Dissolve the hollow glass microspheres in a saturated ammonia solution, and stir ultrasonically for 3 hours. After stirring, filter the hollow glass microspheres, wash and dry them; the particle size of the hollow glass microspheres is 40 μm to 100 μm.

[0027] 2) Put the dried hollow glass microspheres into an aqueous solution of acrylic acid, then add maleic anhydride and benzoyl peroxide, stir and react for 8 hours, filter, and dry to obtain modified glass microspheres. The mass ratio of hollow glass microspheres to acrylic acid is 10:1, the mass ratio of hollow glass microspheres to maleic anhydride is 28:1, and the mass ratio of acrylic acid to benzoyl peroxide is 6:1.

Embodiment 2

[0029] The preparation method of modified glass microspheres comprises the following steps:

[0030] 1) Dissolve the hollow glass microspheres in a saturated ammonia solution, and stir ultrasonically for 6 hours. After stirring, filter the hollow glass microspheres, wash and dry them; the particle size of the hollow glass microspheres is 40 μm to 100 μm.

[0031] 2) Put the dried hollow glass microspheres into an aqueous solution of acrylic acid, then add maleic anhydride and benzoyl peroxide, stir and react for 4 hours, filter, and dry to obtain modified glass microspheres.

[0032] The mass ratio of hollow glass microspheres and described acrylic acid is 16:1, the mass ratio of described hollow glass microspheres and described maleic anhydride is 23:1, the mass ratio of described acrylic acid and described benzoyl peroxide The mass ratio is 12:1.

Embodiment 3

[0034] A polypropylene toughened thermal insulation composite material, calculated in parts by weight, comprises the following components:

[0035] 61 parts of polypropylene resins, 30 parts of modified hollow glass microspheres of Example 1, 7 parts of cellulose whiskers, 2 parts of zinc oxide whiskers, 2 parts of isopropyl tri(dioctyl phosphate acyloxy) titanate 8 parts of ethylene-octene copolymer, 0.6 parts of tris(2,4-di-tert-butylphenyl) phosphite and 1.2 parts of polyethylene wax.

[0036] Preparation:

[0037] 1) The modified hollow glass microspheres of Example 1, isopropyl tris(dioctyl phosphate acyloxy) titanate, copolymerized polypropylene accounting for 35% of the total mass and 15% of the total mass of ethylene- The octene copolymer is mixed evenly, and the masterbatch is prepared with an internal mixer;

[0038] 2) mix the masterbatch obtained in step 1) with cellulose whiskers, zinc oxide whiskers, tris(2,4-di-tert-butylphenyl) phosphite, polyethylene wax, re...

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Abstract

The invention provides a polypropylene-toughened insulation composite and a preparation method thereof. The polypropylene-toughened insulation composite comprises 55-65 parts of polypropylene resin, 25-35 parts of modified hollow glass microspheres, 5-10 parts of cellulose whiskers, 1-3 parts of zinc oxide whiskers, 1-3 parts of titanate coupling agent, 6-12 pats of a toughener, 0.2-0.8 parts of an antioxidant, and 0.6-1.8 parts of a lubricant. The modified hollow glass microspheres are prepared with hollow glass microspheres, maleic anhydride, acrylic acid and benzoyl peroxide. The preparation method includes 1) mixing well the modified hollow glass microspheres, the titanate coupling agent, the polypropylene resin accounting for 30-40% of total mass, and the toughener accounting for 10-20% of the total mass, and preparing masterbatch with a mixer; 2) mixing the masterbatch of step 1) with the rest components, melting at 200-240 DEG C in a twin-screw extruder, mixing, dispersing, andextruding for granulating. The polypropylene-toughened insulation composite has low heat conductivity coefficient and excellent heat insulation and toughness.

Description

technical field [0001] The invention belongs to the technical field of plastics, and in particular relates to a polypropylene toughened thermal insulation composite material and a preparation method thereof. Background technique [0002] Polypropylene, as a general-purpose plastic, has entered every corner of daily life. Polypropylene modified with mineral powder has been widely used in household appliances due to its good rigidity, low shrinkage and deformation. The currently used method is to add elastomer materials to the polypropylene matrix to improve the impact strength, and to improve the tensile strength, bending strength and bending modulus by introducing 10-40% talcum powder, mica powder, wollastonite, kaolin and other fillers. The amount of scratch resistance is improved by introducing scratch resistance agents such as silicone masterbatches and amide-containing resins. [0003] At present, metal delivery pipes are widely used in various fields such as oil extrac...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L23/12C08L23/08C08L1/04C08K9/08C08K7/28C08K7/08
CPCC08L23/12C08L23/14C08L2205/035C08L23/0815C08L1/04C08K9/08C08K7/28C08K7/08
Inventor 汪琦
Owner 安庆市泽烨新材料技术推广服务有限公司