HCP Inc. is selling about $450 million in senior unsecured notes, in part to pay down more expensive debt.

The Long Beach health care real estate investment trust said late Wednesday that the size of the offering was increased in response to investor demand, but did not provide details. The offering is expected to close on Monday.

Investors are to get an effective yield of 3.83 percent. The notes will be due in 2019.

The net proceeds are expected to be nearly $444 million, which will be used to pay down the balance on the company’s revolving credit facility and for general corporate purposes. Citigroup, RBS and UBS Investment Bank acted as joint book-running managers for the offering.

Shares were down 21 cents, or less than 1 percent, to $41.43.