Claims
- 1. A flexible polyester foam produced from a polyester, liquid at 70.degree. F., comprising the reaction product of a diacid, diethylene glycol, a viscosity increasing diacid replacing some of said diacid, and a poly(oxyethylene) glycol, wherein the resulting resin formulation of 100 parts by weight contains about 1-12 parts by weight of the viscosity increasing diacid, about 1-15 parts by weight of the poly(oxyethylene) glycol and about 0.2-5.5 parts of a cross-linking polyol.
- 2. The polyurethane foam of claim 1 wherein said diacid is adipic acid, and said viscosity increasing acid is phthalic acid.
- 3. A flexible polyester polyurethane foam produced from the resin formulation of claim 2.
- 4. The polyurethane foam of claim 3, wherein the polyoxyethylene glycol is present in about 2 to 8 percent by weight and the phthalic acid is present in about 6.0 to 9.0 percent by weight.
- 5. The polyurethane foam of claim 4, wherein the polyoxyethylene glycol is present in about 2 to 3 percent by weight.
Parent Case Info
This is a divisional application of U.S. Ser. No. 263,224, filed May 13, 1981, issued as U.S. Pat. No. 4,349,662 on Sept. 14, 1982.
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Date |
Kind |
3079350 |
Bernstein |
Feb 1963 |
|
3298974 |
Bernstein et al. |
Jan 1967 |
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3399154 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
263224 |
May 1981 |
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