You can't seize the equipment unless when you paid for it, your husband or the business (if the business were an LLC or corporation and were the entity owning the equipment after its purchase) signed an agreement saying that if your husband did not pay his share or repayment were not made, you could take the equipment: there must be a written agreement authorizing it to be taken for nonpayment. Otherwise, you can just try to get the distribution of assets in your divorce to reflect this expense you paid.