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Preparation method of metal modified phenolic aldehyde based polyurethane foam

A phenolic-based polyurethane and metal modification technology, applied in the field of metal-modified phenolic-based polyurethane foam, can solve the problems of the influence of polyurethane strength, difficult to control the degree of crosslinking, uncontrollable structure of thermosetting phenolic polyol, etc. The effect of shortening the test cycle and improving thermal and mechanical properties

Active Publication Date: 2018-03-20
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a method for preparing metal-modified phenolic-based polyurethane foam, which solves the problems that the existing thermosetting phenolic polyol structure is uncontrollable, the degree of crosslinking is difficult to control, and the strength of polyurethane is easily affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Heat phenol and molybdic acid to 50°C under the action of hydrochloric acid, and react for 0.5h to generate phenyl molybdate, wherein the mass ratio of phenol:molybdic acid is 100:1, and the mass ratio of phenol:hydrochloric acid is 100:0.2; molybdenum Phenyl acetate and formaldehyde (the mass ratio of phenol to formaldehyde is 100:20) reacted under the catalysis of zinc acetate (phenol is calculated as 100, zinc acetate is 0.2) for 1 hour, and then hydrochloric acid (phenol is calculated as 100, hydrochloric acid is 0.3 ) reaction for 0.2h, then dehydration under reduced pressure, the temperature dropped to 30°C within 0.3h, then raised to 50°C within 0.1h, kept at constant temperature for 0.1h, and the vacuum degree was 8000Pa to obtain low molecular weight molybdenum modified molybdenum with a molecular weight of 340 High ortho thermoplastic phenolic polyol.

[0022] The obtained molybdenum-modified phenolic polyol and catalyst N,N-dimethylcyclohexylamine, foaming ag...

Embodiment 2

[0025] Heat phenol and molybdenum trichloride to 100°C under the action of sulfuric acid, and react for 6 hours to generate molybdate, wherein the mass fraction ratio of phenol to molybdenum trichloride is 100:40, and the mass ratio of phenol to sulfuric acid is 100: 2. Molybdate and formaldehyde (the mass ratio of phenol and formaldehyde is 100:40) are reacted for 6 hours under the catalysis of calcium oxide (phenol is calculated as 100, and calcium oxide is 1), and then concentrated sulfuric acid is added (phenol is calculated as 100, Concentrated sulfuric acid is 2) react for 5 hours, then dehydrate under reduced pressure, the temperature drops to 60°C within 1 hour, then rises to 90°C within 2 hours, keeps the temperature for 2 hours, and the vacuum degree is 400Pa to obtain low molecular weight molybdenum modification with a molecular weight of 840 High ortho thermoplastic phenolic polyol.

[0026] The obtained molybdenum-modified phenolic polyol, catalyst stannous octoat...

Embodiment 3

[0029] Heat m-cresol and tetramethyl titanium oxide under the action of phosphoric acid to 100°C and react for 6 hours to generate a titanium modified product. The mass fraction ratio of m-cresol and tetramethyl titanium oxide is 100:40, m-cresol The mass ratio of phenol and phosphoric acid is 100:2; the titanium modified product reacts with formaldehyde (the mass ratio of m-cresol and formaldehyde is 100:30) under the catalysis of oxalic acid (m-cresol is calculated as 100, and oxalic acid is 3) 6h, then dehydration under reduced pressure, the temperature dropped to 60°C within 1h, then raised to 90°C within 2h, kept at a constant temperature for 2h, and the vacuum degree was 400Pa, to obtain titanium-modified high-ortho thermoplastic phenolics with a molecular weight of 740 Polyol.

[0030] The obtained titanium modified phenolic polyol and catalyst dibutyltin dilaurate, blowing agent hydrofluorocarbon HFC S , Silicone oil foam stabilizer as component A and PAPI of componen...

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Abstract

The invention provides a preparation method of metal modified phenolic aldehyde based polyurethane foam. The method comprises the steps of reacting a phenolic compound and a metallic compound under the action of a catalyst, and then reacting with an aldehyde compound to generate metal modified high-ortho thermoplastic phenolic polyhydric alcohols with low molecular weight; mixing the obtained metal modified phenolic polyhydric alcohols with a foaming agent, a catalyst, a foam stabilizer and the like to obtain a component A; mixing and reacting the component A and a component B (polyisocyanates), and then curing to obtain the metal modified phenolic aldehyde based polyurethane foam. According to the preparation method of the metal modified phenolic aldehyde based polyurethane foam providedby the invention, the metal modified phenolic polyhydric alcohols is adopted as a raw material for preparing polyurethane, so that experimental procedures are simplified, and a test cycle is shortened; a benzene ring is used for replacing a long carbon chain, and meanwhile, a metal-oxygen bond or metal carbide is introduced on a main chain, so that the thermal performance and the mechanical property are improved; through the synthesis of the metal modified high-ortho thermoplastic phenolic polyhydric alcohols, a molecular structure is improved, and the control of a cross-linked structure is facilitated.

Description

technical field [0001] The present invention relates to the field of synthesis and preparation of heat-resistant, flame-retardant and flame-resistant polyurethane, more specifically, to a metal-modified high-ortho-position thermoplastic phenolic polyol reacted with polyisocyanate to prepare polyurethane with good mechanical properties and thermal properties Process for metal modification of phenolic-based polyurethane foams. . Background technique [0002] As an important synthetic material, polyurethane foam (commonly known as sponge) has light weight, wide hardness range, wear resistance, high impact resistance, wide rebound range, good low temperature flexibility, not affected by ozone erosion, radiation resistance , anti-mold, can be processed on standard equipment, can be bonded with wood, metal and most plastics, can be made into noise reduction, insulation, heat insulation materials, etc., with a wide range of performance, many types of products, and a wide range of ...

Claims

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Application Information

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IPC IPC(8): C08G18/54C08G8/28C08J9/14C08G101/00
CPCC08G8/28C08G18/542C08G2101/00C08J9/14C08J9/144C08J9/146C08J2203/142C08J2203/146C08J2375/04
Inventor 焦明立任东雪杨凯刁泉刘英曹健张彩云李洁裴海艳米立伟
Owner ZHONGYUAN ENGINEERING COLLEGE
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