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Modified polyvinyl alcohol gel technology formula

  • Author:Guo
  • Source:Linkage
  • Release on:2015-01-08
Polyvinyl acetate adhesive cream dosage increase in furniture production, and its raw material vinyl acetate supply, prices rise, the cost will be increased latex. Polyvinyl alcohol modified wood glue, white glue with both easy to use features, but also has the characteristics of cheap glue, the production process is simple, is promising wood adhesives. 

     Polyvinyl alcohol 14% 

     Carboxymethylcellulose 1% 

     Defoamers little 

     5% isocyanate crosslinking agent 

     Propylbenzene emulsion 10% 

     Water 70% 

     Production methods: by the proportion of the above formula, carboxymethyl cellulose, polyvinyl alcohol and stirring, heating 500 (2 dissolved in water under the conditions at this time if the foam is generated, you can add a little defoamers' the material. drop Temperature ~ 20 ~ C, slowly dropping isocyanate crosslinking agents throughout the addition, the material has been cooled with cold water, its temperature is kept below 20 ℃, the maximum does not exceed 22 ℃. Stirred at 20 ℃ 0.5 ~ 1 Hours to complete the reaction. Then added propylbenzene emulsion was stirred for half an hour at 20 ℃, to the material. 

     The product is white emulsion, about 20% solids. At room temperature, the wood adhesive force is greater than 4.782 MPa (wood part of the fracture).