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Continuous production of poly(vinyl butyral)

A continuous flow technology of polyvinyl butyral resin and polyvinyl alcohol is applied in the production of polyvinyl butyral and polyvinyl butyral using continuous production technology, and can solve problems such as unsatisfactory results and the like

Inactive Publication Date: 2012-03-28
SOLUTIA INC
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] While attempts have been made to produce polyvinyl butyral using continuous processes, those conventional attempts have generally yielded less than satisfactory results, including, for example, resins with incompatible polyvinyl butyral components and limitations caused by mixers. Processes resulting in the production of polyvinyl butyral containing poorly condensed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example

[0039] in Typhoon Liquid continuous mixer (Typhoon HSI-4; rotation speed 2,650 RPM), a polyvinyl alcohol solution with a concentration of 11.4 w / w % was pumped continuously. During the experiment, the temperature of the polyvinyl alcohol solution ranged from 100°C to 105°C. In order to obtain a homogeneous acidic PVA solution mixture, the PVA solution in Kenics The acid catalyst was added before the reaction in the mixer, the Kenics The mixer is positioned at Typhoon in front of the inlet of the reactor. Butyraldehyde itself added to Typhoon This acidic polyvinyl alcohol solution in a mixer. The corresponding flow rates for the different reactants were as follows: 1,000 grams per minute for polyvinyl alcohol varnish; 87 grams per minute for nitric acid solution (15%); and 63 grams per minute for butyraldehyde.

[0040] Formed from Typhoon The slurry is pumped to the storage tank to end the high temperature reaction. The precipitation reaction was continued for ...

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Abstract

The present invention provides a method for continuously producing poly(vinyl butyral) in which the acetalization of poly(vinyl butyral) is carried out using a poly(vinyl alcohol) varnish provided to a mixing region of a high shear mixer at an elevated temperature, which reduces the amount of energy required compared to conventional processing because at least one cooling and heating cycle is eliminated, or makes the recuperation of energy more straightforward.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application is a continuation of US Application No. 12 / 426,246, filed April 18, 2009. The entire teachings of the above applications are incorporated herein by reference. technical field [0003] The present invention belongs to the field of polyvinyl butyral production, and in particular, the field of polyvinyl butyral production utilizing continuous production technology. Background technique [0004] Polyvinyl butyral (PVB) is commonly used to make polymer sheets that can be used as interlayers in light transmissive laminates such as safety glass or polymeric laminates. Safety glass generally represents a transparent laminate comprising a thin layer of polyvinyl butyral arranged between two glass sheets. Safety glass is often used to provide transparent barriers in building openings and automotive openings. The primary function of safety glass is to absorb energy, such as that caused by the blowing of object...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/28
CPCC08F8/28C08F8/48C08F16/06
Inventor 陶灵波尔·达纳菲利普·莫尼奥特保罗·范列德
Owner SOLUTIA INC
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