Composite catalytic system and production method of PVB resin adopting composite catalytic system

A catalytic system and production method technology, applied in the field of polymer chemistry, can solve the problems of not reducing the viscosity of PVB materials, not substantially promoting the reaction, etc., to achieve the effect of improving the uniformity of the reaction, promoting the precipitation and reducing the viscosity of the reactants

Inactive Publication Date: 2014-08-06
HANGZHOU XINFU TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These patents have their own characteristics, but they all pay attention to the emulsifying effect of the emulsifier, but do not substantially promote the reaction between the liquid-liquid two-phase or solid-liquid two-phase interface in the PVB production process, and do not reduce the material in the PVB reaction process. viscosity

Method used

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  • Composite catalytic system and production method of PVB resin adopting composite catalytic system
  • Composite catalytic system and production method of PVB resin adopting composite catalytic system

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Preparation of composite catalytic system: Dissolve 0.2kg of sodium dodecylbenzenesulfonate and 1.8kg of tetrabutylammonium bromide in 8kg of distilled water and stir evenly to make the mass ratio of emulsifier to phase transfer catalyst 1: The composite catalytic system solution of 9 is standby;

[0020] Dissolve PVA and add to the composite catalytic system: Dissolve 5kg of PVA in 50kg of distilled water, add 0.75kg of hydrochloric acid with a mass concentration of 30%, adjust the pH to ≤2, then add 2kg of the pre-prepared composite catalytic system solution, stir evenly, and cool down to 10°C. At this time, the mass ratio of PVA, inorganic acid and composite catalytic system is 100:4.5:8;

[0021] Condensation reaction with butyraldehyde: under stirring, slowly add 1.95kg of butyraldehyde to the above reactant within 30 minutes, keep it for 30 minutes and then add 1kg of butyraldehyde, keep it for 30 minutes after adding butyraldehyde, and then keep it at a constant ...

example 2

[0025] Dissolve 0.15 kg of dioctyl sulfosuccinate sodium salt and 0.85 kg of tetrabutylammonium chloride in 9 kg of distilled water, and stir evenly to make an aqueous solution of a composite catalytic system with a mass ratio of emulsifier to phase transfer catalyst of 3:17. All the other steps are the same as Example 1.

example 3

[0027] Add 15kg of hydrochloric acid with a mass concentration of 30% to 1 ton of PVA aqueous solution with a mass concentration of 9%, then add 1.5kg of sodium lauryl sulfate and 10kg of dodecyltrimethylammonium chloride, stir well and then cool down to 15°C . That is, the emulsifier and phase transfer catalyst are directly added to the reaction solution in proportion, without making them into a solution in advance;

[0028] Under the condition of stirring, slowly add 50kg of butyraldehyde to the above reaction solution twice within 90 minutes, keep warm for 60 minutes after the addition of butyraldehyde, raise the temperature to 55°C within 2 hours, and keep at this temperature for 1 hour;

[0029] After the heat preservation is completed, add lye to adjust the pH value of the reaction system to 5 and keep it for 30 minutes;

[0030] Wash the reaction product 6 times with distilled water, add lye to adjust the pH value of the reaction system to 8.5, wash the reaction produc...

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Abstract

The invention relates to a composite catalytic system and a production method of PVB resin adopting the composite catalytic system and belongs to the technical field of high polymer chemistry. The composite catalytic system is characterized in that the composite catalytic system is compounded with and prepared from an emulsifying agent and a phase-transfer catalyst; the mass ratio of the emulsifying agent to the phase-transfer catalyst is 1-30 to 1-70; preferably, the mass ratio of the emulsifying agent to the phase-transfer catalyst is 1-8 to 1-30. The composite catalytic system provided by the invention can promote the dispersion of butyraldehyde, effectively reduce the viscosity of a reactant produced by condensation reaction of PVA and the butyraldehyde, facilitate the precipitation of PVB, improve the reaction efficiency of PVB and the reaction uniformity, and reduce caking of materials during the production of PVB resin. According to the production method of PVB resin adopting the composite catalytic system, related to the invention, the dispersion of the butyraldehyde is better, the viscosity of the reactant during the condensation reaction is lower, the reaction is more uniform, caking of materials is effectively reduced, and the product quality is improved.

Description

technical field [0001] The invention belongs to the technical field of polymer chemistry, and in particular relates to a composite catalytic system and a PVB resin production method using the composite catalytic system. Background technique [0002] American scientists have invented a polymer material that can be used for safety glass interlayer—polyvinyl butyral (PVB). It has characteristics that cannot be replaced by other materials: sandwiching it between two layers of glass can endow the laminated glass with good impact resistance and penetration resistance, and can absorb the impact kinetic energy through the elastic deformation of the PVB diaphragm when it is impacted by the outside world , and the broken glass can continue to stick to the PVB film, which reduces the harm to personnel and improves safety; at the same time, it maintains good light transmission. Now the medium and high-end cars basically use 100% PVB laminated glass as the front windshield. PVB, as an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F16/06C08F8/28
Inventor 贺炜盛学强徐寅莫国军
Owner HANGZHOU XINFU TECH CO LTD
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