Hope all stack members are alright .I am able to fetch binary data of Product image using code

p_ids=self.env.context.get('active_ids')
produtc_templates = self.env['product.template']
for p_id in p_ids:
 binaryData = produtc_templates.search([('id', '=',p_id)]).image 
 data=base64.b64decode(binaryData)
        file="marketplaces/rakuten_ftp/static/imageToSave_"+str(p_id)+".png"
        with open(file, "wb") as imgFile:
            imgFile.write(data)

Above code is create files from binary Data But i am failed to apply condition on mimetype base.Because when i query ir_attachment table with Products id's it return me False.

for p_id in p_ids:
 attachments = self.env['ir.attachment']
 mimetype=attachments.search([('res_id','=',p_id)])

I am considering res_id as Product id .But odoo failed to find any record against that id.So if any body have idea that how i can get mimetype against my product id then please help me.