Additive to prevent phase separation of low profile additive in unsaturated thermoset polyester compositions

A unsaturated resin molding composition comprising

• an additive to prevent phase separation,
• an addition polymerized polymer (D) for low profile characterized as having a number average molecular weight above 50,000 g/mole and existing as a dispersed phase in said composition,
• a radical copolymerizable unsaturated resin, and
• a polymerizable unsaturated monomer,
• wherein said additive to prevent phase separation comprises a reaction product of a functionalized polyether of a formula:
• R1—(OCδH2δ)x—(OCH2CH2)y—W-Φ-COOH with an aminic polybasic species having at least 3 primary and/or secondary amine groups per molecule and a number average molecular weight of from 100 to 100,000 g/mole in a weight ratio of said R1—(OCδH2δ)x—(OCH2CH2)y—W-Φ-COOH:aminic polybasic species of 10:1 to 60:1,
• wherein:
• R1 is a C1-C36 hydrocarbyl group which can be a cyclic, branched, or non-branched alkyl;
• aryl;
• alkylaryl or arylalkyl,
• δ is 3 and/or 4,
• x is 10-60,
• y is 0-10,
• the —(OCδH2δ) and —(OCH2CH2) repeat units can be in any order such as random or blocky and y must be less than x,
• W is an ester, imide, or optionally amide linking group that can optionally include a hydrocarbylene of 1-4 carbon atoms,
• Φ is an aryl group of 6-10 carbon atoms and said aryl group can optionally have substituent(s) which include linear or branched alkyl chains of 1-4 carbon atoms, halides, and/or —NO2.