CPVC pipe and preparation method thereof

A technology of CPVC resin and PVC resin, applied in the field of CPVC pipe and its preparation, can solve the problems of poor thermal stability, decreased impact performance of materials, limited expansion of application fields, etc., and achieves low cost, simple processing, and regular shape. Effect

CN111944080AActive Publication Date: 2020-11-17任丘市华凯通信设备有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-11-17

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Abstract

The invention provides a CPVC pipe and a preparation method thereof, which belong to the field of high polymer materials and comprise the following steps: preparing PVC resin by adopting a binary composite dispersion system consisting of polyvinyl alcohol with alcoholysis degree of 78-82 mol% and dioctyl adipate according to a mass ratio of 2:1-3, and preparing CPVC-g-MHA by adopting a chlorination in-situ grafting method; and blending the prepared CPVC gMHA with a stabilizer, a processing aid, an impact modifier and the like to prepare the CPVC pipe. The CPVC pipe and the preparation method thereof provided by the invention have the advantages of good toughness, good heat resistance, high strength, simplicity, easiness in processing, high efficiency and lower cost.
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Description

technical field

[0001] The invention belongs to the field of polymer materials, and in particular relates to a CPVC pipe and a preparation method thereof. Background technique

[0002] CPVC is the product of PVC after chlorination reaction, and the mass fraction of chlorine can theoretically be increased from 56.8% to 73.2%. With the increase of chlorine content, the molecular polarity increases, and the intermolecular force strengthens, so that the physical and mechanical properties of CPVC resin, especially weather resistance, aging resistance, corrosion resistance, thermal deformation, solubility, flame retardant and self-extinguishing Compared with PVC, its performance and other aspects are greatly improved, so it is widely used in water supply and drainage systems, power cable casings and industrial pipes in heat-resistant environments. It is a polymer material with broad development prospects. However, the melting temperature of CPVC resin is relatively high, the proc...

Examples

Embodiment 1

[0043] 1, a kind of preparation method of PVC resin comprises the following steps:

[0044] Test equipment and raw materials: 4m 3 Polymerization kettle, two layers of three-blade back-swept stirring, two baffles. Vinyl chloride monomer, purity≧99.98%, initiator 1 is 75% (m / m) diethylhexyl peroxydicarbonate organic solution, purchased from Tianjin Aksu Chemical Company, initiator 2 is 75% (m / m) m) organic solution of cumyl peroxide neodecanoate, purchased from Tianjin Aksu Chemical Company, dispersant 1 is 6.0% (m / m) polyvinyl alcohol KH-20 aqueous solution, purchased from Japan Synthetic Chemical Company, dispersing Agent 2 is 15% (m / m) dioctyl adipate methanol solution, purchased from Nantong Runfeng Petrochemical Co., Ltd. The terminator is 40% (m / m) acetone thiosemicarbazone aqueous solution, purchased from Hubei Ferry Chemical Co., Ltd.

[0045] Add 1700L of deionized water, 680g of initiator 1, 195g of initiator 2, 5.1kg of dispersant 1, and 1.02kg of dispersant 2 int...

Embodiment 2

[0055] The addition amount of dispersant 1 is 6.12kg, and the addition amount of dispersant 2 is 0.613kg. All the other parts are completely consistent with Example 1.

Embodiment 3

[0057] The addition amount of dispersant 1 is 2.55kg, and the addition amount of dispersant 2 is 2.04kg. All the other parts are completely consistent with Example 1.