By John Revill 

ZURICH-- Sika AG claimed Monday that the Swiss chemicals company's controlling family no longer has the right to call an extraordinary general meeting, marking the latest twist in a 2.75 billion Swiss franc ($3.13 billion) takeover battle for the company by France's Saint-Gobain SA.

The sale has been fiercely opposed by Sika's board and executives, forcing the family to call an EGM where it aims to remove executives who object to it.

Sika insists that the Burkard family--who are descendants of the company's founder--are no longer exempt from a rule that restricts shareholders' to hold no more than 5% of all registered shares. An exception was originally made because of the family's close association with the company and its assertion that it would protect it against takeovers. The company said the voting rights of the family should be restricted to 5%.

French building materials company Saint-Gobain announced plans in December to acquire holding companySchenker-Winkler Holding AG, or SWH, which is the vehicle controlled by the Burkard family. It holds 16.1% of Sika's capital and 52.4% of its voting rights. Saint- Gobain is targeting the Sika stake in an attempt to kick-start its own earnings growth.

"Now that the Burkard family/SWH have formed a group with Saint-Gobain, this historical privilege must be considered lost, together with the right to convene extraordinary general meetings," Sika said Monday.

Saint-Gobain said it disagrees with the Sika board's claim. "Saint-Gobain is advised by its legal counsel that these actions are clearly against all corporate law and governance principles in Switzerland," the French company said.

Sika said shareholders representing more than 35% of its total capital have given their assurance that they support the board of directors in its efforts to fend off the takeover.

The company which employs 16,000 people, supplies additives for concrete and cement as well as noise-damping products for the automotive sector. Sika increased sales by 8.3% to 5.57 billion francs in 2014 and said it expected operating profit of more than 600 million francs.

Write to John Revill at john.revill@wsj.com

Inti Landauro in Paris contributed to this article.

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