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Sound insulation polyvinyl acetal resin and preparation method and application thereof

A technology of polyvinyl acetal resin and polyvinyl alcohol, which is applied in the field of sound-insulating polyvinyl acetal resin and its preparation and application, and can solve the problem of reducing sound insulation performance and safety performance, reducing the mechanical properties, safety and processing performance of PVB resin Influence and other problems, to achieve the effect of simple process, easy operation, and improved plasticizer absorption capacity

Pending Publication Date: 2022-01-04
SICHUAN DONGFANG INSULATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method has the following deficiencies: (1) reducing the hydroxyl value of PVB resin will reduce the mechanical properties of PVB resin, causing a certain impact on the safety and processability of the diaphragm; (2) the aging resistance of the film (3) The plasticizer precipitates and migrates to the outer layer, thereby reducing the sound insulation performance and safety performance

Method used

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  • Sound insulation polyvinyl acetal resin and preparation method and application thereof
  • Sound insulation polyvinyl acetal resin and preparation method and application thereof
  • Sound insulation polyvinyl acetal resin and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0038]A preparation method of sound-insulating polyvinyl acetal resin (or new polyvinyl acetal resin), the steps are: adding 1000 kg of polyvinyl alcohol and 10000 kg of deionized water into a dissolution kettle at normal temperature, raising the temperature to 95°C, Stir to make it completely dissolve into an aqueous solution of polyvinyl alcohol, then filter, then cool down to 40°C, add a certain amount (see Table 1 for specific dosage) of long-chain aliphatic aldehyde, 6kg of antioxidant 1010, and stir at high speed for 30 minutes to prepare uniform polyethylene Alcohol / long-chain fatty aldehyde mixed solution; the above-mentioned polyvinyl alcohol / long-chain fatty aldehyde mixed solution and hydrochloric acid aqueous solution with a mass concentration of 1.0% are passed through each of them within 8 minutes at the ratio of 100:20 by volume at 30°C. The pipeline continuously enters the tubular reactor with heating and cooling functions, reacts for 20 minutes, and then transf...

Embodiment 8-14

[0046] Put the ordinary PVB resin powder in the amount of 1100KG / H at the screw speed of 700RPM-900RPM, and add it through the automatic feeding system with weight loss scale In the twin-screw extruder, at the same time, plasticizers containing UV agents (ie: ultraviolet absorbers), antioxidants and pigments are passed through at a rate of 400KG / H The liquid material injection port on the barrel of the type twin-screw extruder is injected into the extruder, and the liquid material containing the cohesive force regulator is injected into the extruder synchronously through another liquid material injection port, etc., and the processing temperature is set Between 90 and 170°C, various materials are melted and plasticized through twin-screw shearing; in addition, 200KG of new polyvinyl acetal resin powder is 210KG / H at 300RPM-400RPM screw speed, through a weight loss scale. The automatic feeding system is added In the type twin-screw extruder, the plasticizer is passed throug...

Embodiment 15

[0053] A sound-insulating polyvinyl acetal resin, the compound has the chemical structural formula shown in (I):

[0054]

[0055] In formula (I): x=550-620, y=440-500, z=3-24;

[0056] The chemical structural formula of R is:

[0057]

[0058] In the formula: m=6, 7, 8, 9, 10, 11 or 12.

[0059] The physical and chemical data of the sound-insulating polyvinyl acetal (resin) are: a viscosity of 1500-2000 mPa·s, a hydroxyl content of 18%-21%, a glass transition temperature of 65°C-75°C, and is in the state of white powder.

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Abstract

The invention discloses sound insulation polyvinyl acetal resin as shown in a formula (I) and a preparation method thereof. The preparation method of the compound comprises the following steps: adding polyvinyl alcohol and water into a dissolving kettle, heating to 90-98 DEG C, stirring for dissolving, cooling to 35-45 DEG C, and adding long-chain fatty aldehyde and an antioxidant to prepare a polyvinyl alcohol / long-chain fatty aldehyde mixed solution; continuously feeding the raw materials and a hydrochloric acid aqueous solution into a tubular reactor with heating and cooling functions through respective pipelines to react, transferring all the materials into an aging kettle to react, replenishing the hydrochloric acid aqueous solution, heating to 55-65 DEG C, and reacting; and adding a sodium hydroxide aqueous solution to enable the pH value of the reaction solution to be 10, washing with water, and drying to obtain the sound insulation polyvinyl acetal resin. The prepared sound insulation polyvinyl acetal resin has the advantages of being high in viscosity, good in mechanical property and the like; the resin is used for preparing the three-layer sound insulation PVB film and has good sound insulation performance. (I).

Description

technical field [0001] The invention belongs to organic macromolecular compounds and their preparation and use, and relates to a sound-insulating polyvinyl acetal resin and its preparation method and use. The (prepared) sound-insulating polyvinyl acetal resin of the present invention is particularly suitable as the sound-insulating PVB resin in the field of sound-insulating polyvinyl butyral (abbreviated as PVB) resin films. Background technique [0002] Polyvinyl butyral (referred to as PVB) resin is formed by the polycondensation reaction of polymer polyvinyl alcohol and butyraldehyde, and there is a certain proportion of vinyl alcohol groups in the final polymer. After adding a plasticizer to the resin for plasticization, the precise thickness control system can be used to continuously produce translucent PVB membranes by casting extrusion. Its English name is Polyvinyl Butyral Interlayer, which is abbreviated as PVB membranes. Also known as PVB film or PVB interlayer. ...

Claims

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Application Information

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IPC IPC(8): C08F8/28C08F16/06C08J5/18C08L29/14
CPCC08F8/28C08J5/18C08J2329/14C08F16/06
Inventor 袁港喻永连谢昭亮徐康林
Owner SICHUAN DONGFANG INSULATING MATERIAL
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