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Glass fiber reinforced PP-RCT material and preparation method thereof

A technology of PP-RCT and glass fiber, which is applied in the field of glass fiber reinforced PP-RCT material and its preparation, can solve problems such as the decline of anti-oxidation ability, and achieve improved low-temperature impact performance, high thermal oxidation resistance, and easy glass fiber content The effect of control

Inactive Publication Date: 2016-01-20
ZHEJIANG WEIXING NEW BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the ordinary antioxidant system has a certain water solubility, and the antioxidant will continue to precipitate during the hydrolysis process, and the remaining antioxidant in the material will be less and less, so that the antioxidant capacity of the material will continue to decline.

Method used

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  • Glass fiber reinforced PP-RCT material and preparation method thereof
  • Glass fiber reinforced PP-RCT material and preparation method thereof
  • Glass fiber reinforced PP-RCT material and preparation method thereof

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preparation example Construction

[0032] like figure 1 As shown, the preparation method of the glass fiber reinforced PP-RCT material of the present invention comprises the following steps:

[0033] 1) Weigh the raw materials of random copolymerized polypropylene, compatibilizer, glass fiber, antioxidant, light stabilizer and compound β crystal nucleating agent by weight, for use;

[0034] 2) Fully mixing the raw materials of the random copolymerized polypropylene, compatibilizer, antioxidant, light stabilizer and compound β crystal nucleating agent in parts by weight;

[0035] 3) Add glass fiber to the mixed material, and then melt, blend and extrude to obtain the glass fiber reinforced PP-RCT material.

[0036] Wherein, after step 3), it can also include:

[0037] 4) Pellet the extruded glass fiber reinforced PP-RCT material.

[0038] Wherein, in the step 2), the random copolymerized polypropylene, the compatibilizer, the antioxidant, the light stabilizer and the compound β crystal nucleating agent raw ma...

Embodiment 1

[0045] 80 parts of random copolymerized polypropylene, 5.7 parts of maleic anhydride grafted polypropylene, 3 parts of antioxidant (including 3301.5 parts of antioxidant, 10351.5 parts of antioxidant), light stabilizer (in this example, double ( 2,2,6,6-tetramethyl-4-piperidinyl)sebate) 1 part, 0.3 part of compound β crystal nucleating agent (including 0.15 part of lanthanum phthalate, N, N' -Dicyclohexyl-2,6-naphthalene diamide (DCNDCA) 0.15 parts), added to the high mixer in turn, after fully mixing for 3~5min, the mixture was added to the hopper and mixed and melted with a twin-screw extruder. In a screw extruder, 10 parts of glass fibers whose surface is treated with a silane coupling agent are mixed, then melted and extruded into strands, cooled by water, blown dry, and then cut into pellets. Among them, the screw diameter of the twin-screw extruder is 20~65mm, and the screw length-diameter ratio is 40:1. Section 220 ℃, melt temperature 215 ℃, head 205 ℃.

Embodiment 2

[0047] 65 parts of random copolymerized polypropylene, 9.2 parts of compatibilizer (polypropylene grafted with glycidyl acrylate in this example), 3.5 parts of antioxidant (including 3301.5 parts of antioxidant, 31142 parts of antioxidant) , 2 parts of light stabilizer (containing poly{[6-[(1,1,3,3-tetramethylbutyl)amino]]-1,3,5-triazine-2,4-bis[(2 ,2,6,6-Tetramethyl-4-piperidinyl)imino]-1,6-hexadiene[(2,2,6,6-tetramethyl-4-piperidinyl)imino ]} 1 part, 1 part of polysuccinic acid (4-hydroxy-2,2,6,6-tetramethyl-1-piperidine) ester), 0.3 part of compound β crystal nucleating agent (including tetramethyl 0.15 parts of lanthanum phthalate and 0.15 parts of calcium pimelic acid), added to the high mixer in turn, after fully mixing for 3~5min, the mixture was added to the hopper and mixed and melted with a twin-screw extruder, and then extruded in the twin-screw extruder. In the machine, 20 parts of glass fibers whose surface has been treated with silane coupling agent are mixed, m...

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Abstract

The invention discloses a glass fiber reinforced PP-RCT material and a preparation method thereof. The material comprises the following components by weight: 40-90 parts of random copolymerized polypropylene; 1-30 parts of a compatilizer; 10-30 parts of glass fiber; 0-7.0 parts of an antioxidant; 0-2.0 parts of a light stabilizer; and 0.2-0.6 part of a compound beta crystal form nucleating agent. The preparation method includes: according to the weight part, weighing the random copolymerized polypropylene, the compatilizer, the glass fiber, the antioxidant, the light stabilizer and the compound beta crystal form nucleating agent raw material for standby use; 2) fully mixing the random copolymerized polypropylene, the compatilizer, the glass fiber, the antioxidant, the light stabilizer and the compound beta crystal form nucleating agent raw material by the weight part; and 3) adding glass fiber into the well mixed material, and then performing melt blending and extrusion, thus obtaining the glass fiber reinforced PP-RCT material. According to the invention, the long-term high temperature resistance of the PP-RCT material is maintained, at the same time, the mechanical strength is enhanced, and the low temperature impact performance of the material is improved. The glass fiber reinforced PP-RCT material provided by the invention has high thermal oxidation resistance and simple process.

Description

technical field [0001] The invention relates to the technical field of construction pipes, in particular to a glass fiber reinforced PP-RCT material and a preparation method thereof. Background technique [0002] PP-RCT is a PP random copolymerized polypropylene with a β crystal structure with high heat resistance, pressure resistance, toughness and other characteristics, that is, four-type polypropylene. Among them, C is a hexagonal β crystal, and T is a special attribute endowed with high heat resistance and pressure resistance and high toughness. Germany promulgated the DIN8077PP-RCT (β-PP-R) pipe production standard in May 2007. The pipe made of PP-RCT material changes the crystal structure, thereby improving the long-term performance of the pipe such as high temperature creep resistance, oxidation resistance and slow crack resistance. Compared with the PP-R pipe, the PP-RCT pipe of the same specification can be used at a higher pressure level under certain conditions....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L51/06C08K13/06C08K9/06C08K7/14C08J5/08B29C47/92B29C48/92
CPCC08L23/14B29C48/92B29C2948/92619B29C2948/92704C08J5/08C08L2201/08C08L2203/18C08L2205/08C08L2205/242C08L51/06C08K13/06C08K9/06C08K7/14
Inventor 夏超高莉胡正华
Owner ZHEJIANG WEIXING NEW BUILDING MATERIALS CO LTD
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