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Preparation method of anti-electromagnetic radiation polyurethane foam

A technology of polyurethane foam and anti-electromagnetic radiation, applied in the field of preparation of anti-electromagnetic radiation polyurethane foam, can solve the problems of low electromagnetic shielding efficiency, poor anti-electromagnetic radiation ability, high cost, etc., achieve low cost, reduce mixing performance, and improve mechanical properties Effect

Inactive Publication Date: 2019-01-25
德清舒华泡沫座椅有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problems of low electromagnetic shielding efficiency, poor anti-electromagnetic radiation ability and high cost of foamed plastics in the prior art, and provides a low-cost foam plastic that can effectively improve its anti-electromagnetic radiation ability. A kind of preparation method of anti-electromagnetic radiation polyurethane foam

Method used

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  • Preparation method of anti-electromagnetic radiation polyurethane foam

Examples

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Comparison scheme
Effect test

Embodiment 1

[0037] A kind of preparation method of anti-electromagnetic radiation polyurethane foam, described preparation method comprises the following steps:

[0038] (1) Preparation of siloxane-modified phthalic anhydride polyester polyol:

[0039] (1.1) Preparation of silicone-modified polyol: Weigh 100 parts of propylene glycol in parts by weight, then add 5 parts of tetraethyl orthosilicate to it and stir evenly, then continue to add 0.5 part of glacial acetic acid and water 10 parts, and then stirred and reacted at 40°C for 2 hours, and evaporated under reduced pressure to remove the water and the small molecular substances generated by the reaction to obtain a silicone-modified polyol;

[0040](1.2) Polyester polyol prepolymerization: Weigh 100 parts of silicone-modified polyol obtained in step (1.1) and 45 parts of phthalic anhydride in parts by weight, stir evenly and raise the temperature to 135°C , after stirring and reacting for 3 hours, the prepolymerization step was compl...

Embodiment 2

[0049] A kind of preparation method of anti-electromagnetic radiation polyurethane foam, described preparation method comprises the following steps:

[0050] (1) Preparation of siloxane-modified phthalic anhydride polyester polyol:

[0051] (1.1) Preparation of silicone-modified polyol: Weigh 100 parts of propylene glycol in parts by weight, then add 10 parts of tetraethyl orthosilicate to it and stir evenly, then continue to add 2 parts of glacial acetic acid and water 15 parts, then stirred and reacted at 60°C for 5 hours, and evaporated under reduced pressure to remove the water and the small molecular substances generated by the reaction to obtain a silicone-modified polyol; (1.2) Polyester polyol prepolymerization: according to parts by weight Count and weigh 100 parts of silicone-modified polyol and 80 parts of phthalic anhydride obtained in step (1.1), stir evenly, raise the temperature to 185°C, stir and react for 5 hours until the acid value is 30mgKOH / When the prep...

Embodiment 3

[0060] A kind of preparation method of anti-electromagnetic radiation polyurethane foam, described preparation method comprises the following steps:

[0061] (1) Preparation of siloxane-modified phthalic anhydride polyester polyol:

[0062] (1.1) Preparation of silicone-modified polyol: Weigh 100 parts of propylene glycol in parts by weight, then add 8 parts of tetraethyl orthosilicate to it and stir evenly, then continue to add 1 part of glacial acetic acid and water 12 parts, and then stirred and reacted at 50°C for 3 hours, and evaporated under reduced pressure to remove the water and the small molecular substances generated by the reaction to obtain a silicone-modified polyol;

[0063] (1.2) Polyester polyol prepolymerization: Weigh 100 parts of silicone-modified polyol obtained in step (1.1) and 75 parts of phthalic anhydride in parts by weight, stir evenly and raise the temperature to 155°C , after stirring and reacting for 4 hours, the prepolymerization step was comple...

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Abstract

The invention relates to the field of preparation methods of special foam materials, in particular to electromagnetic shielding polyurethane foam and a preparation method thereof. The polyurethane foam comprises a polyurethane foam base layer, an adhesion enhancing layer, an electromagnetic shielding layer and a wear-resistant layer from inside to outside in sequence. The electromagnetic shieldinglayer is formed by curing electromagnetic shielding paint on the adhesion enhancing layer, and the wear-resistant layer is prepared from wear-resistant paint subjected to ultraviolet-curing cured onthe surface of the electromagnetic shielding layer. By means of the electromagnetic shielding polyurethane foam and the preparation method thereof, the problems in the prior art that the in the priorart, foam plastic is low in electromagnetic shielding efficiency, poor in anti-electromagnetic radiation capability and high in cost are solved, therefore, the electromagnetic shielding polyurethane foam and the preparation method thereof have the following beneficial effects that electromagnetic radiation can be effectively shielded; the cost is low, and the preparation method is simple; charge accumulation is prevented, and formation of static is hinderedavoided.

Description

technical field [0001] The invention relates to a preparation method of a special foam material, in particular to a preparation method of electromagnetic radiation-proof polyurethane foam. Background technique [0002] Polyurethane rigid foam is a high molecular polymerization made of isocyanate and polyether as the main raw materials, mixed by special equipment, and foamed on-site by high-pressure spraying under the action of various additives such as foaming agent, catalyst, and flame retardant. thing. [0003] Polyurethane foam has a wide range of applications and has penetrated into almost all sectors of the national economy, especially in furniture, bedding, transportation, refrigeration, construction, heat insulation and other sectors, and has become one of the indispensable materials. It has become one of the most widely used varieties in plastics. Polyurethane soft foam is mainly used in furniture, bedding and other household items, such as sofas and seats, back cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L83/04C08K3/24C08K3/04C08K5/3492C08K3/32C08G18/46C08G101/00
CPCC08G18/4692C08K2003/323C08K2201/011C08L75/06C08L2201/08C08G2110/0083C08L83/04C08K3/24C08K3/042C08K5/34922C08K3/32
Inventor 卢伟蔡盼盼
Owner 德清舒华泡沫座椅有限公司
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