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PVC (polyvinyl chloride) composite modified material and preparation method thereof

A technology of composite modification and PVC resin, applied in the field of PVC modified materials and its preparation, can solve the problems of product surface roughness, poor ductility, melt fracture, etc., achieve low density, improve creep resistance, and improve low-temperature impact performance effect

Inactive Publication Date: 2016-05-25
HARBIN ZHONGDA PROFILE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that there is still a certain amount of unsaturated double bonds in the molecular chain of the existing PVC modified materials, which will form active centers, which will lead to poor ductility, easily lead to melt fracture, and cause the surface of the product to be rough and dull. problem, and provide PVC composite modified material and its preparation method

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  • PVC (polyvinyl chloride) composite modified material and preparation method thereof

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specific Embodiment approach 1

[0019] Specific embodiment one: present embodiment is a PVC composite modified material, by weight parts by the PVC resin of 60~85 parts, the low-temperature toughening agent of 3.5~10 parts, the impact modifier of 4~9 parts, 2 ~5 parts of processing aids, 0.5~1 parts of surfactants, 2~5 parts of composite stabilizers, 2~5 parts of covering agents, 0.1~0.5 parts of initiators and 0.5~4.5 parts of crosslinking agents Prepared.

[0020] The thermal stability of PVC resin is an important factor that determines its quality, and can directly affect the processing performance and service life. To study PVC is to consider the inherent molecular structure of PVC resin itself, and this structure has unstable factors. Therefore, this paper On the basis of the original modification, the invention increases the viscoelasticity of PVC melt, thereby improving die expansion and melt strength, and improving the molecular structure, crystallinity, direction of microcrystals, and degree of cros...

specific Embodiment approach 2

[0021] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the PVC resin is a PVC resin with a hardness value of 70. Others are the same as the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the covering agent is rutile titanium dioxide. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a PVC (polyvinyl chloride) modified material and a preparation method thereof, particularly a PVC composite modified material and a preparation method thereof. The invention aims to solve the following problem: the molecular chain of the existing PVC modified material has a certain amount of unsaturated double bonds which can form active centers, thereby causing poor ductility and high melt crushing tendency, and further causing rough surface and no gloss of the product. The PVC composite modified material is prepared from a PVC resin, a low-temperature toughener, an impact modifier, processing aids, a surfactant, a composite stabilizer, a covering agent, an initiator and a crosslinking agent according to parts by weight. The preparation method comprises the following steps: 1. weighing; 2. premixing to obtain a premix; 3. carrying out multi-step mixing to obtain a multi-step mixture; 4. carrying out final mixing to obtain a final mixture; and 5. carrying out extrusion granulation to obtain the PVC composite modified material. The method is mainly used for preparing the PVC composite modified material.

Description

technical field [0001] The invention relates to a PVC modified material and a preparation method thereof. Background technique [0002] It is well known that the difficult-to-process characteristics of PVC resin are manifested in its heat sensitivity, its processing temperature and decomposition temperature are relatively close, and it has poor heat resistance, aging resistance, low melt heat strength, poor fluidity, easy thermal deformation, and low glass transition temperature. And the low temperature performance and impact strength are poor, the adhesion between the resins is not high, it is easy to melt and break, and the processing performance is not good, so the residence time of the resin in the processing equipment is longer than that of the general resin, and it is easy to coke and decompose in the dead corner of the equipment. Causes disadvantages such as difficulty in processing and molding. Therefore, in order to solve the above disadvantages, people have adopte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L9/02C08L51/04C08L33/20C08K3/22B29C47/92B29C48/92
CPCC08L27/06B29C48/92B29C2948/92704C08L2205/035C08L9/02C08L51/04C08L33/20C08K2003/2241
Inventor 张凤兰张涛胡淼李占龙陈锋
Owner HARBIN ZHONGDA PROFILE TECH
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