IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0286723
(2002-11-01)
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발명자
/ 주소 |
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출원인 / 주소 |
- E.I. duPont de Nemours and Co.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
2 인용 특허 :
11 |
초록
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Spandex having good whiteness retention, high heat-set efficiency, and percent set is made from comprises amide soluble polyurethaneurea polymers prepared by reacting polyether which comprises the reaction product of a polymeric glycols with ortho-substituted diisocyanates and bulky diamine chain ex
Spandex having good whiteness retention, high heat-set efficiency, and percent set is made from comprises amide soluble polyurethaneurea polymers prepared by reacting polyether which comprises the reaction product of a polymeric glycols with ortho-substituted diisocyanates and bulky diamine chain extenders.
대표청구항
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1. A polyurethaneurea comprising the reaction product of: i. a polymeric glycol; ii. a diisocyanate composition comprising at least one Orthoalky-MDI selected from the group represented by Formula I: wherein: each R1may be the same or different and are independently selected from the grou
1. A polyurethaneurea comprising the reaction product of: i. a polymeric glycol; ii. a diisocyanate composition comprising at least one Orthoalky-MDI selected from the group represented by Formula I: wherein: each R1may be the same or different and are independently selected from the group consisting of hydrogen, methyl, ethyl, propyl and isopropyl; each R2may be the same or different and are independently selected from the group consisting of hydrogen, methyl, ethyl, propyl and isopropyl; each X may be the same or different and are selected from the group consisting of hydrogen, fluorine, and chlorine; wherein the total amount of said at least one Orthoalkyl-MDI of Formula I is at least about 20 mole percent of said diisocyanate composition; and iii. a chain extender composition comprising at least one bulky diamine selected from the group consisting of: 2,2-dimethyl1.3-pentanediamine, 2,5-dimethyl-2,5-hexanediamine, 2,3,5,6-tetramethyl-1,4-diaminocyclohexane, and 2,5-dimethylpiperazine; and wherein the total amount of said at least one bulky diamine is at least about 80 mole percent of said chain extender composition; wherein said polyurethaneurea polymer is amide soluble. 2. The polyurethaneurea according to claim 1 wherein said Orthoalkyl-MDI is selected from the group consisting of bis(3,5-dimethyl-4-isocyanatophenyl)methane, bis(3,5-diethyl-4-isocyanatophenyl)methane, and mixtures thereof. 3. The polyurethaneurea according to claim 1 wherein said Orthoalkyl-MDI is bis(3,5-diethyl-4-isocyanatophenyl)methane. 4. The polyurethaneurea according to claim 1 wherein said polymeric glycol is a polyether glycol and said at least one Orthoalkyl-MDI of Formula I is at least about 60 mole percent of said diisocyanate composition. 5. The polyurethaneurea according to claim 1 wherein said bulky diamine is 2,2'dimethyl-1,3-diaminopentane. 6. The polyurethaneurea according to claim 1 wherein said at least one bulky diamine is at least about 90 mole percent of said chain extender composition. 7. The polyurethaneurea according to claim 1 wherein: (i) said polymeric glycol is selected from the group consisting of poly(tetramethyleneether) glycol and poly(tetramethyleneether-co-2-methyltetramethyleneether) glycol, (ii) said Orthoalkyl-MDI is selected from the group consisting of bis(3,5-dimethyl-4-isocyanatophenyl)methane, bis(3,5-diethyl-4-isocyanatophenyl)methane, and mixtures thereof, (iii) said at least one Orthoalky-MDI of Formula I is at least about 60 mole percent of said diisocyanate composition, and (iv) said chain extender composition comprises at least about 90 mole percent 2,2'-dimethyl-1,3-diaminopentane. 8. The polyurethaneurea according to claim 1 wherein: (i) said polymeric glycol is poly(tetramethyleneether) glycol, (ii) said Orthoalkyl-MDI is selected from the group consisting of bis(3,5-diethyl-4-isocyanatophenyl)methane, bis(3.5-diisopropyl-4-isocyanatophenyl)methane, and mixtures thereof, and (iii) said chain extender composition comprises 2,2'-dimethyl-1,3-diaminopentane. 9. Spandex comprising the polyurethaneurea polymer of claim 1. 10. Spandex comprising the polyurethaneurea of claim 7.
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