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A kind of production method of zwitterionic polyvinyl butyral resin

A polyvinyl butyral resin and a production method technology, applied in the field of polymer materials, can solve the problems of yellowing, increased haze, decreased tensile breaking strength and impact strength, etc.

Active Publication Date: 2016-04-20
CHENGDU HUIEN FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to ensure the solubility of IPVBS and the compatibility with polyvinyl alcohol, when carrying out the acetalization reaction with o-formylbenzenesulfonic acid, the amount of the introduced anionic benzenesulfonic acid group (or the first acetalization The degree of acetalization) is very limited, and the anti-adhesion effect is also very limited. At the same time, the adhesion of the resin or / film to the substrate such as glass and metal decreases, the transparency decreases, and the haze increases
[0008] The aforementioned technology introduces benzenesulfonic acid-type anions into the resin compound, so that the resin or membrane will be polluted by multivalent metal ions in improper storage, resulting in chemical crosslinking of the resin polymer chain, and the membrane will become hard and pan. Yellow, decreased transparency, decreased tensile breaking strength and impact strength

Method used

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  • A kind of production method of zwitterionic polyvinyl butyral resin
  • A kind of production method of zwitterionic polyvinyl butyral resin
  • A kind of production method of zwitterionic polyvinyl butyral resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 100g of PVA1799 into 900g of distilled water, stir to dissolve, configure it into a 10% PVA aqueous solution, adjust the pH value of the system to 9 with NaOH; add 0.045mol N,N-dimethylolacrylamide to the system, and stir at 80°C for 3 hours; then add 0.045mol sodium chloroacetate to the system, and stir and react at 80°C for 30min.

[0032] Cool the system down to 10°C, add 0.25g of sodium dodecylbenzenesulfonate, 9g of 36% hydrochloric acid, stir and mix evenly; then slowly add 57g of n-butyraldehyde dropwise for 30min. During the feeding process, the temperature of the system will rise slightly, and white polyvinyl butyral resin will start to precipitate. Control the system to react at 10°C for 30 minutes; then raise the temperature to 70°C in 90 minutes, and then adjust the pH of the system with 4.5g of sodium hydroxide 10, and then kept at 70°C for 60 minutes, filtered, washed 4 times with hot water at 70°C, and dried to obtain 149g of zwitterionic polyvinyl bu...

Embodiment 2

[0034] Add 200g of PVA2199 into 3800g of distilled water, stir to dissolve, configure it into a 5% PVA aqueous solution, adjust the pH value of the system to 9 with KOH; add 0.18mol N,N-dihydroxyethylacrylamide to the system, and stir at 60°C for 5 hours; then add 0.18mol sodium chloroacetate to the system, and stir and react at 60°C for 60min.

[0035] Cool the system down to 12°C, add 0.45g maleic anhydride dioctyl sodium sulfonate, 20g 36% hydrochloric acid, stir and mix evenly; then slowly add 120g n-butyraldehyde dropwise for 60min. During the feeding process, the temperature of the system will rise slightly, and white polyvinyl butyral resin will start to precipitate. The control system is reacted at 10-12°C for 60 minutes; then the temperature is raised to 70°C in 120 minutes, and then adjusted with 9.2g of sodium hydroxide The pH of the system is 10, and the reaction is maintained at 70°C for 60 minutes, filtered, washed three times with hot water at 65°C, and dried to...

Embodiment 3

[0037] Add 50g of PVA1099 into 284g of distilled water, stir to dissolve, and configure it into a 15% PVA aqueous solution. Use KOH to adjust the pH value of the system to 9; add 0.03mol N, N-dihydroxyethylacrylamide to the system, and stir at 50°C for reaction 6 hours; then add 0.03mol sodium chloroacetate to the system, and stir and react at 50°C for 50min.

[0038] 100 g of methanol was added to the system, and a white solid precipitated out of the system, which was filtered, dried, and acetalized to obtain 51 g of modified PVA.

[0039] Dissolve the modified PVA into 459g of dimethyl sulfoxide, add 4g of sulfuric acid under stirring, control the temperature of the system at about 60°C, and add 35g of butyraldehyde dropwise, and the dropping time is controlled at 40min. After the dropwise addition was completed, the mixture was incubated at 70° C. for 100 minutes. Add 82g of warm water to the system under high-speed stirring, precipitate solid, filter, wash with warm water...

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Abstract

The invention discloses a production method of a novel zwitterionic polyvinyl butyral resin. The method comprises the following steps: introducing a zwitterionic group to a high-molecular chain, carrying out acetalation for positioning the zwitterionic group, butyral, vinyl alcohol and a less amount of a vinyl acetate constitutional unit in a same high-molecular chain, and controlling the synthesis technology conditions to obtain the novel polyvinyl butyral resin having a bonding resistance and an antifouling performance. The zwitterionic group is connected with the vinyl alcohol unit on the high-molecular chain through an alkyl ether bond, so the axial rotation of a C-O-C bond in the side chain along the carbon chain and the flexibility of a film are not influenced, the tensile break strength and the impact strength of the film are good, and the transparency, haze and the like of the film can satisfy application requirements.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a production method of zwitterionic polyvinyl butyral resin. Background technique [0002] Polyvinyl butyral resin (PVB) is a functional thermoplastic resin produced by the acetalization reaction of polyvinyl alcohol resin with butyraldehyde under the action of an acid catalyst. Its molecular structure contains vinyl alcohol, butyral six-membered rings, and The structural unit of vinyl acetate can also be regarded as a copolymer of vinyl alcohol, vinyl acetate and butyral structure; changing the composition of different structural units on the resin polymer chain can adjust the performance of PVB resin to meet different applications field requirements. [0003] Polyvinyl butyral resin (PVB) has excellent film-forming performance, optical performance, UV resistance and heat resistance, and has good bonding ability to glass and metal. It is mainly used as automobile windsh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F16/06C08F8/44C08F8/30C08F8/28
Inventor 李晶晶李朝祥
Owner CHENGDU HUIEN FINE CHEM
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