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Crosslinking polyvinyl chloride foam and preparation method thereof

A technology of cross-linking polyvinyl chloride and foam, applied in the field of foam materials, can solve problems such as long time consumption, achieve the effects of improving quality and heat resistance, improving the diffusion of moisture, and reducing time

Active Publication Date: 2015-06-03
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

[0005] The purpose of the present invention is to solve the time-consuming problem of the method for preparing cross-linked polyvinyl chloride foam in the prior art, improve the quality and heat resistance of the foam, and provide a cross-linked polyvinyl chloride foam and its preparation method

Method used

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  • Crosslinking polyvinyl chloride foam and preparation method thereof
  • Crosslinking polyvinyl chloride foam and preparation method thereof
  • Crosslinking polyvinyl chloride foam and preparation method thereof

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preparation example Construction

[0040] The preparation method of above-mentioned cross-linked polyvinyl chloride foam, comprises the following steps:

[0041] Step 1, after weighing each component according to the composition and parts by weight, mixing each component evenly to obtain a pasty material;

[0042] Wherein, when the catalyst is one or more of indole, sodium octanoate, potassium isooctanoate, potassium oleate, and potassium stearate, the components can be mixed in any order as long as they are uniformly mixed;

[0043] When the catalyst contains N', N", N"'-tris(dimethylaminopropyl) symmetrical hexahydrotriazine, due to N', N", N"'-tris(dimethylaminopropyl) Symmetrical hexahydrotriazine has strong catalytic activity. When it is mixed with isocyanate, the reaction temperature rises quickly. If there are other components in the environment, the viscosity of other components will increase rapidly, and even good mixing cannot be completed. ; So when the catalyst contains N', N", N"'-tris(dimethylami...

Embodiment 1

[0054] The cross-linked polyvinyl chloride foam is composed of: 100 parts by weight of PVC resin, 50 parts by weight of liquefied MDI, 20 parts by weight of bisphenol A glycidyl ether, 1 part by weight of potassium stearate and 15 parts by weight of blowing agent H.

[0055] The preparation method of above-mentioned cross-linked polyvinyl chloride foam:

[0056] Mix 100 parts by weight of PVC resin, 50 parts by weight of liquefied MDI, 20 parts by weight of bisphenol A glycidyl ether, 1 part by weight of potassium stearate and 15 parts by weight of foaming agent H, and add them into a mold with a cavity of 22mm thickness. Foaming and molding were carried out at a temperature of 200°C and a pressure of 19MPa, heat preservation for 660s, cooling to 71°C and opening the mold to obtain a pre-foamed body;

[0057] Then place the obtained pre-foam in 95°C hot water for secondary expansion for 40 minutes, then place the secondary expanded foam in 65°C saturated water vapor for curing...

Embodiment 2

[0059] Cross-linked polyvinyl chloride foam, composed of: 30 parts by weight of TDI, 40 parts by weight of methyl hexahydrophthalic anhydride, 40 parts by weight of tetrahydrophthalic anhydride, 0.2 parts by weight of N', N", N"'-tri(dimethylamino Propyl) symmetrical hexahydrotriazine, 100 parts by weight of PVC resin and 1 part by weight of AC.

[0060] The preparation method of above-mentioned cross-linked polyvinyl chloride foam:

[0061] First mix 30 parts by weight of TDI, 40 parts by weight of methyl hexahydrophthalic anhydride and 40 parts by weight of tetrahydrophthalic anhydride to obtain a mixture, and then quickly pour the mixture into 0.2 parts by weight of N',N",N"'- In the container of tris(dimethylaminopropyl) symmetrical hexahydrotriazine, stir and mix evenly, then pour 100 parts by weight of PVC resin and 1 part by weight of AC into the above-mentioned container, and mix evenly to obtain a pasty material;

[0062] Put the paste material into a mold with a cav...

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Abstract

The invention discloses crosslinking polyvinyl chloride foam and a preparation method thereof, and belongs to the technical field of foamed materials. The problem of long time consumption of preparation of a crosslinking polyvinyl chloride foamed material in the prior art is solved, so that the quality and heat-resistant performance of the foamed material can be improved. The crosslinking polyvinyl chloride foam comprises the components in parts by weight: 100 parts of PVC resins, 30-150 parts of isocyanate, 1-15 parts of foaming agents, 0-80 parts of anhydride, 0-20 parts of epoxy compounds and 0.02-4 parts of catalysts, wherein the catalyst is one or more of N',N'',N'''-tri(dimethyl aminopropyl) symmetrical hexahydro-triazine, N-(alpha-ethoxyl) dimethylenimine, indole, sodium caprylate, isocaprylic acid, potassium oleate and potassium stearate. The foamed material is high in quality and heat-resistant performance, and high in production efficiency.

Description

technical field [0001] The invention belongs to the technical field of foam materials, and in particular relates to a cross-linked polyvinyl chloride foam and a preparation method thereof. Background technique [0002] Polyvinyl chloride cross-linked foam is widely used in construction, building materials, decoration, furniture, advertising, automobile 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, foaming agent, isocyanate and anhydride, and different modified components, such as styrene and acrylonitrile, can also be added to improve Foam dimensional stability. [0003] The preparation method of the polyvinyl chloride cross-linked foam material in the prior art is: first mix the solid material and the liquid material to obtain the paste material, then pour the paste material into the mold, raise the temperature un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08J9/10C08J9/08C08J3/24B29C43/02B29C43/58B29C37/00
CPCB29C37/00B29C43/02B29C43/58B29C2043/5808B29C2043/5816C08J3/242C08J9/08C08J9/102C08J9/103C08J9/107C08J2327/06C08L27/06
Inventor 唐涛姜治伟
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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