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Foam material based on suspended polyvinyl chloride resin and preparation method thereof

A technology of polyvinyl chloride resin and foam materials, which is applied in the field of foam materials, can solve the problems of the deviation between the composition of foam materials and the design composition, the formation of wet powder materials, and the deterioration of the uniformity of foam materials, so as to reduce the production cost. Effects of cost, reduced time, improved quality and heat resistance

Active Publication Date: 2017-08-11
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is due to the high oil absorption value of the loose PVC suspension resin and its strong ability to absorb liquids. When solid materials and liquid materials are mixed, no paste materials can be obtained, only wet powder materials can be formed. If they are directly put into the mold for molding, The liquid raw material in the wet powdery material will flow out from the gap of the mold, so that the composition of the foam material deviates from the design composition, and waste is generated, and the uniformity of the foam material will be deteriorated due to the temperature gradient of heat transfer during heating

Method used

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  • Foam material based on suspended polyvinyl chloride resin and preparation method thereof
  • Foam material based on suspended polyvinyl chloride resin and preparation method thereof
  • Foam material based on suspended polyvinyl chloride resin and preparation method thereof

Examples

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preparation example Construction

[0046] The preparation method of the above-mentioned foam material based on suspended polyvinyl chloride resin may further comprise the steps:

[0047] Step 1. After weighing the above-mentioned components according to the composition and parts by weight, mix them uniformly at room temperature to obtain a mixed material;

[0048] Wherein, after weighing each component according to the composition and parts by weight, when the component contains a catalyst, and the catalyst contains N', N", N"'-tris(dimethylaminopropyl) symmetrical hexahydrotriazine, First mix the isocyanate and acid anhydride evenly to obtain the mixture, then pour the mixture into the container with the catalyst, in order to make the isocyanate and the catalyst fully contact, generally pour it quickly, after mixing evenly, then pour it into the container with the catalyst Add loose PVC suspension resin, PVC paste resin, foaming agent and epoxy compound, mix evenly at room temperature to obtain a mixed materia...

Embodiment 1

[0074] The foam material based on suspended polyvinyl chloride resin consists of: 50 parts by weight of TDI, 15 parts by weight of phthalic anhydride, 100 parts by weight of loose PVC suspension resin, 5 parts by weight of bisphenol A glycidyl ether, 0.02 parts by weight of DC193 , 5 parts by weight of AIBN and 1 part by weight of blowing agent H.

[0075] The preparation method of above-mentioned foam material:

[0076] 50 parts by weight of TDI, 15 parts by weight of phthalic anhydride, 100 parts by weight of PVC paste resin, 5 parts by weight of bisphenol A glycidyl ether, 0.02 parts by weight of DC193, 5 parts by weight of AIBN and 1 part by weight of blowing agent H room temperature Mix evenly to obtain a mixed material;

[0077] Add the above-mentioned mixed materials into a mold with a cavity of 22mm thickness, close the mold, fix the mold with a flat hot press, preheat at 80°C for 20min, then foam and press at a temperature of 175°C and pressurize to 16MPa, and keep i...

Embodiment 2

[0081] The foam material based on suspended polyvinyl chloride resin consists of: 30 parts by weight of MDI, 40 parts by weight of maleic anhydride, 20 parts by weight of succinic anhydride, 100 parts by weight of loose PVC suspension resin, and 10 parts by weight of trimethylol glycidyl ether , 10 parts by weight of epoxy soybean oil and 15 parts by weight of blowing agent H.

[0082] The preparation method of above-mentioned foam material:

[0083] With 30 parts by weight of MDI, 40 parts by weight of maleic anhydride, 20 parts by weight of succinic anhydride, 100 parts by weight of loose type PVC suspension resin, 10 parts by weight of trimethylol glycidyl ether, 10 parts by weight of epoxy soybean oil and 15 parts by weight of The foaming agent H is mixed uniformly at room temperature to obtain a mixed material;

[0084] Add the above-mentioned mixed materials into a mold with a cavity of 22 mm in thickness, close the mold, fix the mold with a flat hot press, preheat at 1...

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Abstract

The invention discloses a suspension PVC (Polyvinyl Chloride) resin-based foaming material and a preparation method thereof, belonging to the technical field of foaming materials. The foaming material comprises 50-100 parts of loose type PVC suspension resin, 0-50 parts of PVC paste resin, 30-150 parts of isocyanate, 1-15 parts of a foaming agent, 0-80 parts of anhydride, 0-20 parts of an epoxy compound and 0-4 parts of a catalyst, wherein the total parts by weight of the loose type PVC suspension resin and the PVC paste resin are 100 parts by weight. According to the preparation method for the foaming material, the phenomenon that the abscesses of the foaming material are nonuniform caused by re-flow of mixing material in a mould, so that the PVC foaming material with a uniform abscess structure can be prepared by adopting the PVC suspension resin, and the preparation cost of the PVC foaming material is greatly lowered.

Description

technical field [0001] The invention belongs to the technical field of foam materials, and in particular relates to a foam material based on suspended polyvinyl chloride resin and a preparation method thereof. Background technique [0002] Rigid polyvinyl chloride foam is widely used in construction, building materials, decoration, furniture, advertising, automobiles and other industries due to its wide service temperature and good corrosion resistance. In the prior art, the components of rigid polyvinyl chloride cross-linked foam mainly include polyvinyl chloride resin, blowing agent, isocyanate and acid anhydride. The preparation method is as follows: first mix the solid material and the liquid material to obtain the mixed material, and then pressurize and heat it in a sealed mold, the polyvinyl chloride resin in the mold is gelled, the foaming agent is decomposed, and after cooling, the mold is opened. A pre-foamed body containing many cells is obtained, and then after s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K13/02C08K5/1539C08K5/1515C08J9/10C08J9/40B29C44/08B29C44/60
CPCB29C44/08B29C44/60C08G18/003C08G18/02C08J9/102C08J9/103C08J9/107C08J9/40C08J2203/04C08J2203/18C08K2201/014C08L27/06C08L2203/14C08L2205/025C08L2205/03C08L75/00C08L91/00
Inventor 唐涛姜治伟
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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