IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0393762
(1999-09-10)
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발명자
/ 주소 |
- Bogdan, Mary Charlotte
- Bement, Leslie Bruce
- Decaire, Barbara Ruth
- Konopa, Dennis Paul
- Kieta, Harold John
- Singh, Rajiv Ratna
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
2 인용 특허 :
11 |
초록
▼
The invention relates to the addition of α-methyl styrene, isobutanol and/or isopropanol to reduce vapor pressure, improve k-factor, enhance the solubility of the blowing agent in the premix and/or improve the processing characteristics of polyurethane and polyisocyanurate closed-cell foams prepared
The invention relates to the addition of α-methyl styrene, isobutanol and/or isopropanol to reduce vapor pressure, improve k-factor, enhance the solubility of the blowing agent in the premix and/or improve the processing characteristics of polyurethane and polyisocyanurate closed-cell foams prepared with a blowing agent comprising a hydrofluorocarbon selected from the group consisting of 1,1,1,3,3-pentafluoropropane, 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, and mixtures thereof.
대표청구항
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1. A method of preparing polyurethane and polyisocyanurate foam compositions comprising the step of reacting and foaming a mixture of ingredients which react to form polyurethane or polyisocyanurate foams in the presence of a blowing agent comprising a hydrofluorocarbon selected from the group consi
1. A method of preparing polyurethane and polyisocyanurate foam compositions comprising the step of reacting and foaming a mixture of ingredients which react to form polyurethane or polyisocyanurate foams in the presence of a blowing agent comprising a hydrofluorocarbon selected from the group consisting of 1,1,1,3,3-pentafluoropropane, 1,1,1,2-tetrafluorethane, 1,1,2,2-tetrafluoroethane, and mixtures thereof; and an effective amount of a blowing agent additive selected from the group consisting of: isobutanol, isopropanol and mixtures thereof; mixtures of α-methyl styrene and isobutanol; mixtures of α-methyl styrene and isopropanol; and mixtures of α-methyl styrene, isobutanol and isopropanol. 2. The method of claim 1 wherein the additive is present in the amount of from about 0.02 to about 10 weight percent, based on the amount of blowing agent. 3. The method of claim 1 wherein the additive includes α-methyl styrene. 4. The method of claim 3 wherein α-methyl styrene is present in an amount of from about 0.02 to about 5 weight percent, based on the amount of blowing agent. 5. The method of claim 1 wherein the blowing agent comprises 1,1,1,3,3-pentafluoropropane and an effective amount of α-methyl styrene. 6. The method of claim 5 wherein the α-methyl styrene is present in the amount of from about 0.02 to about 5 weight percent, based on the amount of blowing agent. 7. The method of claim 6 wherein the α-methyl styrene is present in the amount of from about 0.02 to about 2 weight percent, based on the amount of blowing agent. 8. A closed cell foam prepared from a polymer foam formulation containing a blowing agent comprising a hydrofluorocarbon selected from the group consisting of 1,1,1,3,3-pentafluoropropane, 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, and mixtures thereof; and an effective amount of a blowing agent additive selected from the group consisting of: isobutanol, isopropanol and mixtures thereof; mixtures of α-methyl styrene and isobutanol; mixtures of α-methyl styrene and isopropanol; and mixtures of α-methyl styrene, isobutanol and isopropanol. 9. The closed cell foam of claim 8 wherein the additive is present in the amount of from about 0.02 to about 10 weight percent, based on the amount of blowing agent. 10. The closed cell foam of claim 8 wherein the additive includes α-methylstyrene. 11. The closed cell foam of claim 8 wherein α-methyl styrene is present in an amount from about 0.02 to about 5 weight percent, based on the amount of blowing agent. 12. The closed cell foam of claim 8 wherein the blowing agent comprises 1,1,1,3,3-pentafluoropropane and an effective amount of α-methylstyrene. 13. The closed cell foam of claim 12 wherein the α-methyl styrene is present in the amount of from about 0.02 to about 5 weight percent, based on the amount of blowing agent. 14. The closed cell foam of claim 12 wherein the α-methyl styrene is present in the amount of from about 0.02 to about 2 weight percent, based on the amount of blowing agent. 15. A closed cell foam containing a cell gas comprising a blowing agent as defined in claim 8. 16. The method of claim 1 wherein the additive is selected from the group consisting of isobutanol, isopropanol and mixtures thereof. 17. The method of claim 16 wherein the additive is present in the amount of from about 0.02 to about 10 weight percent, based on the amount of blowing agent. 18. The closed cell foam of claim 8 wherein the additive is selected from the group consisting of isobutanol, isopropanol and mixtures thereof. 19. The closed cell foam of claim 18 wherein the additive is present in the amount of from about 0.02 to about 10 weight percent, based on the amount of blowing agent.
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