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Microporous PVC foam and preparation method thereof

A foam and microporous technology, applied in the field of PVC foam, can solve the problems of limited development, poor mechanical properties and strength, and achieve the effects of being conducive to construction, high production efficiency, and good flame retardancy

Active Publication Date: 2022-02-01
东营瑞致新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Microcellular PVC foam is divided into linear PVC foam and cross-linked PVC foam. It was originally used in thermal insulation compartments. As people continue to recognize it, its excellent specific strength, specific modulus and excellent corrosion resistance However, in some specific application fields, the mechanical properties of microcellular foam, especially the poor strength, limit its development.

Method used

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  • Microporous PVC foam and preparation method thereof
  • Microporous PVC foam and preparation method thereof
  • Microporous PVC foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The microporous PVC foam described in the present embodiment 1, in parts by weight, has a raw material composition as follows:

[0029]

[0030]

[0031] in:

[0032] The viscosity of polyvinyl chloride resin at room temperature is 5000-6000mPa·s.

[0033] Small molecule alcohol is a mixture of ethanol and tert-butanol.

[0034] The isocyanate is a mixture of toluene diisocyanate and carbodiimide-modified diphenylmethane diisocyanate.

[0035] The anhydride is a mixture of phthalic anhydride, maleic anhydride and cyclohexane-1,2-dicarboxylic anhydride.

[0036] The blowing agent is a mixture of diisopropyl azodicarboxylate and 4,4'-oxobisbenzenesulfonyl hydrazide; among them, diisopropyl azodicarboxylate and 4,4'-oxobisbenzenesulfonyl The mass ratio of hydrazine is 2:2.5.

[0037] The heat stabilizer is a mixture of carbon-4,4-diisoidene-alcohol-phosphate chelating polymer and organotin 181.

[0038] The phosphorus-based flame retardant is tricresyl phosphate...

Embodiment 2

[0045] The microporous PVC foam described in the present embodiment 2, in parts by weight, has a raw material composition as follows:

[0046]

[0047]

[0048] in:

[0049] The viscosity of polyvinyl chloride resin at room temperature is 7000-8000mPa·s.

[0050] The small molecule alcohol is methanol.

[0051] The isocyanate is cyclohexyl diisocyanate.

[0052] The anhydride is a mixture of trimellitic anhydride, hexachloromethenetetrahydrophthalic anhydride and methylhexahydrophthalic anhydride.

[0053] The blowing agent is a mixture of diisopropyl azodicarboxylate and 4,4'-oxobisbenzenesulfonyl hydrazide; among them, diisopropyl azodicarboxylate and 4,4'-oxobisbenzenesulfonyl The mass ratio of hydrazine is 3:4.5.

[0054] The heat stabilizer is a mixture of carbon-4,4-diisoidene-alcohol-phosphate chelating polymer and organotin 181.

[0055] The phosphorus-based flame retardant is a mixture of tert-butylated triphenyl phosphate and methacryloyloxyethyl phosphate...

Embodiment 3

[0062] The microporous PVC foam described in the present embodiment 3, in parts by weight, has a raw material composition as follows:

[0063]

[0064] in:

[0065] The viscosity of polyvinyl chloride resin at room temperature is 7500-8000mPa·s.

[0066] The small molecule alcohol is tert-butanol.

[0067] The isocyanate is diphenylmethane diisocyanate.

[0068] The anhydride is a mixture of trimellitic anhydride and cyclohexane-1,2-dicarboxylic anhydride.

[0069] The blowing agent is a mixture of diisopropyl azodicarboxylate and 4,4'-oxobisbenzenesulfonyl hydrazide; among them, diisopropyl azodicarboxylate and 4,4'-oxobisbenzenesulfonyl The mass ratio of hydrazine is 2.5:4.0.

[0070]The heat stabilizer is a mixture of carbon-4,4-diisoidene-alcohol-phosphate chelating polymer and organotin 181.

[0071] The phosphorus-based flame retardant is a mixture of tricresyl phosphate and tert-butylated triphenyl phosphate.

[0072] The preparation method of the microporous P...

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Abstract

The invention belongs to the technical field of PVC foam, and in particular relates to a microporous PVC foam and a preparation method thereof. The raw material consists of 95-100 parts of polyvinyl chloride resin, 20-35 parts of small molecule alcohol, 40-75 parts of isocyanate, 20-30 parts of anhydride, 6-8 parts of foaming agent, 3-7 parts of heat stabilizer, melamine cyanurate It is composed of 1-3.5 parts of salt and 0.5-1.5 parts of phosphorus flame retardant. The microporous PVC foam of the present invention has dense and uniform cells, high compressive strength and tensile strength, and good flame retardancy; the preparation method is simple and controllable, beneficial to construction, easy to operate, and easy to produce. High efficiency, suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of PVC foam, and in particular relates to a microporous PVC foam and a preparation method thereof. Background technique [0002] Polyvinyl chloride foam material is a foam material made of polyvinyl chloride resin as the main body, adding foaming agent and other additives. Polyvinyl chloride foam materials are divided into two types: hard and soft. Rigid PVC foam materials generally have a relatively large elastic modulus, no flexibility, and high compressive strength. When the stress reaches a certain value, deformation can occur, and it cannot be restored after the stress is released. undisturbed. Rigid polyvinyl chloride foam has the advantages of good mechanical properties, stable chemical properties, corrosion resistance, non-absorbent, non-combustible, cheap, etc., and is widely used in packaging, heat preservation and other fields. [0003] Microcellular PVC foam is divided into linear PVC foam and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L85/02C08K5/00C08K5/523C08K5/521C08K5/3492C08K5/57C08J9/10C08J9/02
CPCC08J9/103C08J9/105C08J9/0038C08J9/0052C08J9/0061C08J9/0095C08J9/0028C08J9/02C08J2327/06C08J2485/02C08J2203/04C08J2205/044
Inventor 张成王亮亮杨江龙
Owner 东营瑞致新材料有限公司
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