Investor demand lead Health Care Property Investors Inc. to announce Wednesday that it will sell $500 million worth of 10-year senior secured notes, twice the amount it originally planned.

Net proceeds from offering, which is expected to close Jan 22, will be used to repay amounts outstanding under the Long Beach-based real estate investment trust’s credit facilities and for general corporate purposes.

The price to the investors was 99.323% of the principal amount of the notes for an effective yield of 6.09 percent, with new proceeds approximately $493.1 million. the company said. The securities contain a so-called “poison put,” meaning the company must buy the bonds back at 101 cents on the dollar if there is a change of control at the REIT.

Citigroup Global Markets Inc., UBS Investment Bank and Wachovia Securities LLC are the joint lead managers for the sale, the Long Beach-based real estate investment trust said. Underwriter for the offering is Goldman, Sachs & Co.

Shares of Health Care Properties closed down 70 cents to $38.70.