Crosslinking type polyvinyl chloride/thermoplastic polyurethane light foaming material and preparation method thereof

A thermoplastic polyurethane and polyvinyl chloride technology, which is applied in the field of cross-linking technology to prepare polyvinyl chloride/thermoplastic polyurethane foam, and cross-linked polyvinyl chloride lightweight materials, can solve the problem of poor impact resistance of hard products, decreased material performance, The plasticizer is easy to migrate and other problems, to achieve the effect of good dimensional stability, high foaming ratio and excellent physical properties

Inactive Publication Date: 2012-07-04
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its hard products have poor impact resistance and are prone to brittle cracks. At the same time, the plasticizer is easy to migrate, which reduces the performance of the material.

Method used

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  • Crosslinking type polyvinyl chloride/thermoplastic polyurethane light foaming material and preparation method thereof
  • Crosslinking type polyvinyl chloride/thermoplastic polyurethane light foaming material and preparation method thereof
  • Crosslinking type polyvinyl chloride/thermoplastic polyurethane light foaming material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Each component is weighed in proportion to prepare a cross-linked polyvinyl chloride / thermoplastic polyurethane lightweight foaming material.

[0033] Pre-plasticization: mix 100g of PVC, 0.5g of dibenzoyl peroxide, 2.0g of azodicarbonamide, 1.0g of zinc oxide, 4g of dioctyl phthalate and 1.0g of calcium oxide, mix them and put them in 100℃ Pre-plasticize in a drying oven or oil bath, stir once every 5 minutes, after the plasticizer is completely absorbed by the polyvinyl chloride resin, cool and set aside;

[0034] Plate preparation: Add 4g of TPU to the pre-plasticized PVC, melt and masticate on a double-roll mill at a temperature of 130°C for 10 minutes; mold it into a plate with a hot press at a temperature of 130°C.

[0035] Cross-linking: Cross-linking was carried out on a hot press at 150° C. for 3 minutes.

[0036] Foaming: Foaming on a hot press at 200°C for 1 minute to prepare a cross-linked polyvinyl chloride / thermoplastic polyurethane lightweight foaming ma...

Embodiment 2

[0038] Each component is weighed in proportion to prepare a cross-linked polyvinyl chloride / thermoplastic polyurethane lightweight foaming material.

[0039] Pre-plasticization: PVC 100g, dicumyl peroxide 1.0g, azodicarbonamide 8.0g, dinitrosopentamethylenetetramine 3.0g, zinc stearate 3.0g, phthalic acid di 8g of octyl ester and 5.0g of white carbon black, after mixing, put it into a 100°C drying oven or oil bath for pre-plasticization, stir once every 3 minutes, after the plasticizer is completely absorbed by the polyvinyl chloride resin, cool and set aside;

[0040] Sheet material preparation: Add 8g of TPU to the pre-plasticized PVC, melt and masticate on a double-roll mill at a temperature of 120°C for 12 minutes. A hot press is molded into a plate, and the molding temperature is 140°C.

[0041] Cross-linking: Cross-linking was carried out on a hot press at 160° C. for 10 minutes.

[0042] Foaming: Foaming on a hot press at 210° C. for 3 minutes to prepare a cross-linke...

Embodiment 3

[0044] Each component is weighed in proportion to prepare a cross-linked polyvinyl chloride / thermoplastic polyurethane lightweight foaming material.

[0045] Pre-plasticization: PVC 100g, triallyl cyanurate 2.0g, sodium bicarbonate 5.0g, azodicarbonamide 5.0g, lead stearate 10g, dibutyl phthalate 12g and calcium carbonate 2.0g, after mixing, put it into a 110°C drying oven or oil bath for pre-plasticization, stir once every 3 minutes, after the plasticizer is completely absorbed by the polyvinyl chloride resin, cool and set aside;

[0046] Plate preparation: Add 12g of TPU to the pre-plasticized PVC, melt and knead in an internal mixer, the plasticizing temperature is 110°C, and the time is 15 minutes. It is molded into a plate in a hot press, and the molding temperature is 100°C.

[0047] Cross-linking: Cross-link for 5 minutes at 160°C on a hot press.

[0048] Foaming: Foaming is carried out in an oil bath at 180° C. for 20 minutes to prepare a cross-linked polyvinyl chlorid...

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Abstract

The invention provides a crosslinking type polyvinyl chloride light foaming material and a preparation method of the crosslinking type polyvinyl chloride light foaming material. The foaming material consists of 100 by weight of polyvinyl chloride, 1 to 20 by weight of thermoplastic polyurethane, 1 to 20 by weight of foaming agents, 1 to 10 by weight of auxiliary foaming agents, 1 to 5 by weight of nucleating agents, 0.1 to 2.0 by weight of crosslinking agents, 1 to 30 by weight of plasticizing agents and 1 to 10 by weight of stabilizing agents, and in addition, the foaming material is prepared through preplastification, melting plastication, chemical crosslinking and chemical foaming. The foaming material has the apparent density being 25 to 100 kg / m<3>, the material thickness being 1 to 8mm, the bending strength being 5 to 20 MPa, the tensile strength being 15 to 25 MPa and the impact strength being 5 to 10 KJ / M<2>. The micro-crosslinking foam plastic provided by the invention has the advantages that the foam hole is uniform and controllable, the foaming ratio is high, the size stability is good, the physical performance and the mechanical strength are excellent, and the micro-crosslinking foam plastic is suitable for being made into large-scale foaming products.

Description

technical field [0001] The invention relates to a cross-linked polyvinyl chloride lightweight material, which has excellent physical properties, mechanical strength and practicability; the invention also relates to a method for preparing polyvinyl chloride / thermoplastic polyurethane foam plastics by cross-linking technology, which belongs to Polymer processing field. Background technique [0002] Polymer foam material refers to a polymer-based microporous material with numerous bubbles inside, and can also be regarded as a composite material filled with gas. [0003] As a type of plastic, foam plastic is composed of plastic and uniformly dispersed gas, so it has the following characteristics. Low density, there are a lot of bubbles in the foam plastic, and its density is about 10-500kg / m 3 , which is a fraction to a few tenths of non-foamed plastic products. The heat insulation performance is excellent, because there are a large number of cells in the foam plastic, the th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L75/04C08K13/02C08K5/12C08K5/098C08K3/26C08K3/30C08K3/32C08J9/12C08J9/10C08J3/24
Inventor 郭卫红焦雷张桂新陈程陈聪李幼辰张唯舟汪济奎
Owner EAST CHINA UNIV OF SCI & TECH
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