Additives for polyurethane foam polyol blends and polyurethane foams comprising the same

A polyurethane or polyisocyanurate foam composition comprising:

• a polyol or a mixture thereof;
• an isocyanate;
• a compatibility additive;
• a surfactant;
• and
• a polyurethane catalyst or a mixture thereof;
• wherein the compatibility additive is selected from a compound of the formula:
• where:
• M1 is (R1)(R2)(R3)Si—O1/2
• M2 is (R4)(R5)(R6)Si—O1/2
• D1 is (R7)(R8)Si—O2/2
• D2 is (R9)(R10)Si—O2/2
• R10 is —CH2—CH(R10)—CH2—O—[CH2CH(CH3)O]p—[CH2CH2O]q—R12
• R1, R2, R3, R4, R5, and R6, are independently selected from a C1-C10 alkyl or R10;
• R7, R8, and R9 are independently selected from a C1-C10 alkyl,
• R11 is H or a C1-C10 alkyl;
• R12 is H, a C1-C10 alkyl, or an acetyl group;
• m is 0 to 100;
• n is 1 to 50;
• p is 0 to 35;
• q is 0-45;
• and
• p+q≥1.