Preparation process of polyurethane-based thermal insulation type multi-layer composite waterproof coiled material

A multi-layer composite and waterproof membrane technology, which is applied in the field of waterproof membrane preparation, can solve the problems of weakening the van der Waals force between polyvinyl chloride molecules, increasing the mobility of polyethylene molecular chains, and reducing the crystallinity of polymer molecular chains. Achieve the effects of enhanced flexibility, reduced viscosity, and reduced crystallinity

Inactive Publication Date: 2020-08-25
徐磊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation process for polyurethane-based heat-insulating multi-layer composite waterproof coiled material, wherein the prepared toughening modifier contains two mercapto groups, which can react with the chlorine atoms on the PVC chain, thereby making The toughening modifier is introduced into the PVC chain. At the same time, because the toughening modifier contains a large number of ester groups, the Van der Waals force between the ester group and the polymer weakens the Van der Waals force between the polyvinyl chloride molecules. Thereby increasing the mobility of the polyethylene molecular chain, reducing the crystallinity of the polymer molecular chain, reducing the viscosity of the polymer, enhancing the flexibility, no need to add plasticizers, and because the toughening modifier acts directly through chemical bonds Combined with the polyvinyl chloride chain, it will not migrate in high temperature and solvents, thus solving the problem of directly adding plasticizers to the existing polyvinyl chloride, and the plasticizers are easy to migrate and cause the performance of polyvinyl chloride to decrease

Method used

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  • Preparation process of polyurethane-based thermal insulation type multi-layer composite waterproof coiled material
  • Preparation process of polyurethane-based thermal insulation type multi-layer composite waterproof coiled material
  • Preparation process of polyurethane-based thermal insulation type multi-layer composite waterproof coiled material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The concrete preparation process of toughening modifier is as follows:

[0036] Step 1, add 100g of α-ionone, 61g of diethanolamine, 17g of paraformaldehyde, 53g of concentrated hydrochloric acid and 400g of absolute ethanol into the reaction kettle at the same time, raise the temperature to 60°C and reflux for 3-4h, cool to room temperature and use sodium hydroxide Adjust the pH of the solution to 13, then add diethyl acetylglutarate dropwise therein, stir and react at room temperature for 6 hours, let stand overnight, filter, wash with deionized water for 4-5 times, and dry to obtain product A. The reaction structural formula is as follows, and the product A is identified by the infrared spectrometer at the same time, and the product A is at 1724cm -1 A new absorption peak appears at the place, which is the infrared absorption peak of -C=O in the ester group of diethyl acetylglutarate, so it can be seen that diethyl acetylglutarate is successfully grafted on α-ionone;...

Embodiment 2

[0052] The preparation process of the toughened polyvinyl chloride sheet is as follows:

[0053] S1: Weigh 1 kg of PVC powder and add it to 8 L of cyclohexanone and stir to dissolve it, then add 340 g of the toughening modifier prepared in Example 1 and 380 g of sodium carbonate to it, heat up to 80°C for reflux reaction for 32 hours, and recover the solvent by rotary evaporation , washing the obtained solid product with water for 4-5 times to obtain modified polyvinyl chloride powder;

[0054] S2: Add 1kg of toughened polyvinyl chloride powder and 96g of calcium carbonate into the open mill at the same time to melt and plasticize the sheet, then preheat the sheet in a vulcanizer at 170°C for 15 minutes, then pressurize, exhaust and re- The pressure was kept for 7 minutes, and then shaped by a cold press to obtain a polyvinyl chloride sheet.

Embodiment 3

[0066] A preparation process of polyurethane-based thermal insulation multi-layer composite waterproof membrane, the specific preparation process is as follows:

[0067] In the first step, 1kg of phosphorous trichloride, 1.21kg of ethanolamine and 860g of acetone were added to the reaction kettle at the same time, stirred and reacted for 3 hours at room temperature, then 350g of sodium carbonate was added to it, stirred and reacted for 2 hours, and then 2.86kg of ethylene glycol disulfide was added. Glycerol ether, heated to 82°C, refluxed and stirred for 4 hours to obtain a light yellow polymer solution, washed the polymer solution with ionic water for 5-6 times, and then subjected to vacuum distillation to obtain polyphosphoryloxypolyamine;

[0068] In the second step, 1 kg of polyphosphoryl oxypolyamine, dibutylene dilaurate, diisopropanolamine and water are simultaneously added to the stirring tank and stirred and mixed for 5 minutes, then triphenylmethane triisocyanate is ...

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Abstract

The invention discloses a preparation process of a polyurethane-based thermal insulation type multi-layer composite waterproof coiled material. The specific preparation process of the preparation process includes the following steps of: simultaneously adding polyphosphooxy polyamine, dibutyl dilaurate, diisopropanolamine and water into a stirring kettle; performing stirring and mixing, then addingtriphenylmethane triisocyanate into the stirring kettle; performing stirring and mixing, pouring an obtained mixture into a mold so as to subject the mixture to foaming and shaping; rolling obtainedpolyurethane foam for multiple times; and adhering a layer of polyvinyl chloride sheet to each of the upper surface and the lower surface of a polyurethane foam sheet to obtain the thermal insulationtype multi-layer composite waterproof coiled material. The toughening modifier prepared by the preparation method disclosed by the invention contains two sulfydryl groups which can react with chlorineatoms on a PVC chain, so that the toughening modifier can be introduced on the PVC chain; the toughening modifier contains a large amount of ester groups, so that Van der Waals' force among polyvinylchloride molecules can be weakened, the mobility of polyethylene molecular chains is improved, the crystallinity of the polymer molecular chains is reduced, the viscosity of the polymer is reduced, and flexibility is enhanced.

Description

technical field [0001] The invention belongs to the field of waterproof coiled material preparation and relates to a process for preparing a polyurethane-based thermal insulation multilayer composite waterproof coiled material. Background technique [0002] Polyvinyl chloride is widely used in the preparation of waterproof membranes due to its low cost, excellent hydrophobicity, flame retardancy and chemical resistance. The toughness of the material, and the thermal stability of polyvinyl chloride is relatively poor, it is easy to decompose to generate hydrogen chloride, and under the action of hydrogen chloride, it is easy to accelerate the oxidative decomposition of polyvinyl chloride, thereby affecting the performance of polyvinyl chloride. Adding plasticizers to PVC materials weakens the force between PVC molecules through plasticizers, thereby improving the toughness of PVC, and improving the stability of PVC by adding heat stabilizers, but due to ultraviolet light Due...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K3/26C08J5/18C08F8/42C08F114/06C08G18/65C08G18/64C08G18/32C08G18/76B29C69/02C08G101/00C08L75/04
CPCB29C69/02C08F8/42C08G18/3275C08G18/6461C08G18/6535C08G18/7664C08J5/18C08J2327/06C08J2375/04C08K2003/265C08G2110/0083C08F114/06
Inventor 徐磊
Owner 徐磊
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