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Low-foaming high-impact-resistance PVC product and preparation method and application thereof

A high-impact, low-foaming technology, applied in the field of PVC products, can solve the problems of poor impact resistance of low-foaming PVC products, achieve smooth inner and outer walls of pipes, inhibit skin foaming, and achieve the effects of low density

Active Publication Date: 2021-08-03
长春联塑实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of the poor impact resistance of existing low-foaming PVC products, and to provide a low-foaming high-impact PVC product. The preparation method of PVC products adopts a combination of two foaming agents. During the preparation process, different temperatures and gas flows are controlled to control different foaming amounts in the early and late stages, so as to obtain the best foaming effect and improve the performance of low-foaming PVC products. impact resistance

Method used

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  • Low-foaming high-impact-resistance PVC product and preparation method and application thereof
  • Low-foaming high-impact-resistance PVC product and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of low-foaming high-impact PVC products, comprising the steps of:

[0036] S1. Weighing of formula materials: Screen qualified raw materials and weigh them in turn, except for PVC resin and nano-calcium carbonate, and make them into small material bags;

[0037] Mixing process: Put the above-mentioned weighed small material bags into the mixer in sequence according to the above-mentioned PVC resin, nano-calcium carbonate, and small material bags in proportion. , the hot mixing temperature is 110°C, and the cold mixing temperature is 50°C to obtain a homogeneous blend;

[0038] S2. Put the blend obtained in step S1 into the mixer again, add stearic acid at the same time, control the mixing speed of the mixer for hot mixing to 1200r / min, the stirring time is 3min, and the hot mixing temperature is 100°C. Cold mixing at 60°C to obtain a surface-treated blend; the mass fraction of stearic acid in the blend is 2%;

[0039]S3. Then put the surface-treat...

Embodiment 2～8

[0041] The difference between the preparation methods of the low-foaming high-impact PVC products of Examples 2-8 and Example 1 lies in the replacement of components. The components and parts by weight of Examples 1-8 are shown in Table 1 below.

[0042] Components and parts by weight of each embodiment of table 1

[0043]

[0044]

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Abstract

The invention provdies a low-foaming high-impact-resistance PVC product and a preparation method and application thereof, the AC foaming agent and the universal foaming agent are combined for use, the foaming amount in the front stage and the later stage is controlled by controlling the temperature, and the gas flow is controlled during extrusion, so that the optimal foaming effect is achieved, the impact resistance of the product is improved, after the tube blank is extruded, the inner wall and the outer wall are rapidly cooled and shaped, skin foaming is inhibited, the smoothness of the inner wall and the outer wall is improved, in addition, the foaming agent is further matched with nano calcium carbonate and MBS flexibilizer, the dispersity is improved, the tensile extension effect of a molecular chain structure is improved, and the mechanical property of the product is improved; stearic acid is also utilized to perform surface modification wrapping on the blend, the smoothness of the inner and outer walls of the foamed product is increased and the mechanical friction is reduced. The material can be used for preparing a novel PVC drainage pipe material, has the characteristics of excellent low foaming and high impact resistance, is light in weight and good in mute capability, and is suitable for a low-pressure drainage system, a communication electric power sleeve and the like.

Description

technical field [0001] The invention relates to the technical field of PVC products, more specifically, to a low-foaming high-impact PVC product and its preparation method and application. Background technique [0002] PVC products are often used in the field of drainage systems. PVC products have excellent flame retardancy, acid and alkali resistance, and corrosion resistance. widely welcomed. Existing conventional PVC products will also add foaming agent to make low-foaming PVC products, which have low relative density and have the basic properties of ordinary rigid PVC pipes. In recent years, they have developed rapidly. For example, Chinese patent CN104945777A discloses a It is a low-foaming rigid PVC pipe with a crust. PVC pipes are made by using modifiers such as PVC and MBS. ACR is used as a processing aid for PVC so that the foaming agent can be fully foamed and dispersed evenly. The impact resistance of PVC products can only reach 0 ° 2h, 10 / 12 without cracking. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L55/02C08L23/08C08K3/26C08K5/09C08J9/10B29C48/09B29L23/00
CPCC08J9/103C08J9/0061C08J9/0066C08J9/0023B29C48/09B29L2023/22C08J2203/04C08J2327/06C08J2455/02C08J2423/08
Inventor 王振陈建辉张振鹏谢智恒彭先伍吴远辉
Owner 长春联塑实业有限公司