Prova qualcosa come
CREATE TABLE #TEMP
(
Node int
)
DECLARE @textXML XML
DECLARE @data NVARCHAR(MAX),
@delimiter NVARCHAR(5)
SELECT @data = '-1,-1,-1,-1,701,-1,-1,-1,-1,-1,304,390,403,435,438,439,442,455 ',
@delimiter = ','
SELECT @textXML = CAST('<d>' + REPLACE(@data, @delimiter, '</d><d>') + '</d>' AS XML)
INSERT INTO #TEMP
SELECT T.split.value('.', 'nvarchar(max)') AS data
FROM @textXML.nodes('/d') T(split)
SELECT * FROM #TEMP
DROP TABLE #TEMP