We are working with a content based startup that needs to 301 redirect a lot of its pages to other websites. Will give you an example to help you understand.

If we assume this is the startups domain and URL structure

www.ourcompany.com/brand1/article

What they want to do is do a 301 redirect of www.ourcompany.com/brand1/ to www.brand1.com

I have never seen 301 as a problem to SEO or link juice. But in this case where all the major URLs are getting redirected to other sites i was wondering if it would have a negative effect. Right now they have just 20-30 brands but they are planning to hit a couple of hundreds this year.