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Emulsifying defoaming system and PVB (Polyvinyl Butyral) resin production method employing the same

A production method and system technology, applied in the direction of foam dispersion/prevention, film/sheet adhesive, adhesive, etc., can solve problems such as laminated glass defects, and achieve easy phase change reaction, less foam, and better adhesion and the effect of optical performance improvement

Active Publication Date: 2013-04-03
HUZHOU XINFU NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the film is made into laminated glass, these micro-bubbles are broken and fused due to high temperature and high pressure, forming bubble defects visible to the naked eye, which leads to the generation of laminated glass defects.

Method used

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  • Emulsifying defoaming system and PVB (Polyvinyl Butyral) resin production method employing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of a solution containing an emulsified defoaming system: Dissolve 1.8kg of cetyl sodium sulfosuccinate (DOS) and 0.2kg of Tween 80 in 4L of ethanol, stir and mix evenly at 50°C, cool to room temperature, spare. At this time, the weight percentage of sodium cetyl sulfosuccinate in the emulsified defoaming system was 90%.

[0025] Dissolution of PVA: Add 8L of hydrochloric acid and 1kg of the above-mentioned solution containing the emulsified defoaming system to 1 ton of PVA aqueous solution with a weight concentration of 9% of PVA, mix and stir evenly. At this time, the weight ratio of PVB, hydrochloric acid and emulsified defoaming system is 100:8.3:0.32.

[0026] Condensation reaction with butyraldehyde: lower the temperature of the above mixed solution to 10° C., and add 50 kg of butyraldehyde within 30 minutes under stirring. After the addition of butyraldehyde was complete, the reaction temperature was raised to 13° C. and kept at this temperature for ...

Embodiment 2

[0030] Add 80L of hydrochloric acid, 0.23kg of sodium cetyl sulfosuccinate and 0.025kg of Tween 80 to 1 ton of 9% PVA aqueous solution and stir to mix evenly. That is: without preparing the solution of the emulsified defoaming system in advance, directly add sodium cetyl sulfosuccinate and Tween 80 to the reaction solution. All the other step processes are identical with implementation example 1.

Embodiment 3

[0032] The weight ratio of sodium cetyl sulfonate to Tween 80 in the emulsified defoaming system is 8:2.

[0033] Dissolution of PVA: Dissolve PVA into a PVA aqueous solution with a PVA weight concentration of 8%, add hydrochloric acid with a concentration greater than 30% and a solution containing an emulsified defoaming system into the PVA aqueous solution and stir evenly, so that the PVA, hydrochloric acid and emulsified defoaming system The weight ratio is 100:5:0.1.

[0034]Condensation reaction with butyraldehyde: lower the temperature of the PVA aqueous solution to 5°C; slowly add the butyraldehyde solution to the reaction solution within 30 minutes under stirring conditions, and the amount of butyraldehyde added is 45% of the weight of PVA; butyraldehyde After the dropwise addition, keep the temperature for 10 minutes, then slowly raise the temperature to 60° C. within 1 hour, and keep this temperature for 20 minutes.

[0035] Add alkali to neutralize: add alkali to n...

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Abstract

The invention provides an emulsifying defoaming system and a PVB (Polyvinyl Butyral) resin production method employing the same and relates to an additive and application thereof in a resin production process, wherein the emulsifying defoaming system is composed of an emulsifier and a defoamer; the weight percentage of the emulsifier is 50-99.9%; and the emulsifier is the mixture of sodium hexadecyl sulfosuccinate or octyl phenyl polyoxyethylene ether and sodium alkyl sulfosuccinate. The emulsifying defoaming system is applied so that bubbles generated by stirring while the excellent emulsification effect of the reaction system is achieved; so that therefore, the generation of massive wastes can be reduced and the quality and yield of the product can be improved. Simultaneously, the defoamer applied in the emulsifying defoaming system provided by the invention is also advantages for improving the compatibility of a plasticizer with the resins. The formation of bubbles in the subsequent extrusion curtain coating processing procedure of the resins also can be eliminated in the presence of the defoamer; and the obtained membrane is free of defect apparently.

Description

technical field [0001] The invention relates to an additive and its application in a resin production process, in particular to an emulsification defoaming system and a PVB resin production method using the emulsification defoaming system. Background technique [0002] Polyvinyl butyral film (PVB) can be used as an interlayer of safety glass, because it has better impact resistance, penetration resistance, sound insulation, UV protection and heat insulation performance than other safety glasses such as tempered glass. , And is widely used in architectural safety glass, car front windshield, window display glass, etc. [0003] Polyvinyl butyral film is a plasticized adhesive film formed by extrusion casting of polyvinyl butyral resin and plasticizer. In order to obtain a film with stable quality and long-lasting adhesive performance in the extrusion casting process, it is necessary to strictly control the resin production process in the production process of PVB resin. Gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04C08J3/03C08L29/04C08F116/06C08F8/28C08F116/38C09J129/14C09J7/00
Inventor 莫国军过鑫富胡益辉盛雪强王凤娥徐寅张晨
Owner HUZHOU XINFU NEW MATERIALS CO LTD
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