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US 12,319,851 B2Granted
Bio-based adhesive for electrical insulation
AssigneeHitachi Energy Ltd
InventorsVishal Srivastava, Lars Erik Schmidt, Susy Varughese, Sruthi Lalitha, Abhijit Prakash Deshpande
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Abstract
The present disclosure is providing a bio-based adhesive composition which is water-based. The adhesive composition includes bioprotein, salt of carboxymethyl cellulose, gum, alkali and a solvent. The adhesive composition is prepared at ambient conditions. The adhesive composition is useful for insulation of the electric material, especially for pressboard for a transformer which requires good adhesive for imparting good mechanical and electrical strength.
Claims13
An adhesive composition comprising:
- a. bioprotein in an amount of 8 to 30 wt. % based on the weight of the adhesive composition, wherein the bioprotein is selected from histone, bovine serum albumin, casein, soy protein isolate, gluten protein, or combination thereof;
- b. salt of carboxymethyl cellulose;
- c. gum;
- d. alkali selected from ammonium hydroxide, borax, sodium carbonate, trisodium phosphate, or sodium hydroxide;
- and
- e. solvent being water in an amount of 75-90 wt. % based on the weight of the adhesive composition, and
- wherein the adhesive composition is free of an organic solvent and exhibits a flexural strength of at least 65 MPa.
4 more elements
Dependencies are inferred from the claim text.