IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0198014
(2002-07-18)
|
우선권정보 |
JP-0296056 (2001-09-27) |
발명자
/ 주소 |
- Nishida, Kiyomi
- Shimizu, Toyofumi
- Shimizu, Takayuki
- Motomura, Eiji
- Matsumoto, Takuya
|
출원인 / 주소 |
- Tokai Rubber Industries, Ltd.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
8 |
초록
▼
A flame-resistant and sound- and vibration-insulating member for a vehicle, which is a soft polyurethane foam formed by a reaction between an organic polyisocyanate component and a polyol component, wherein the organic polyisocyanate component includes as a major component a monomeric MDI and furthe
A flame-resistant and sound- and vibration-insulating member for a vehicle, which is a soft polyurethane foam formed by a reaction between an organic polyisocyanate component and a polyol component, wherein the organic polyisocyanate component includes as a major component a monomeric MDI and further includes a reaction product containing carbodiimide and/or uretone imine groups, the monomeric MDI containing 29-33% of NCO and including 1-45% by weight of 2,4′-diphenylmethane diisocyanate, while the polyol component includes at least 50% by weight of polyol having 2-8 functional groups and a molecular weight of 1000-10000, and wherein the soft polyurethane foam has a density of 40-150 kg/m 3 , a 50% compressive load of (5-60)×10 −2 N/mm 2 , a tensile strength of at least 120 kPa and an elongation of at least 50%, and exhibits flame resistance according to FMVSS-302. A process of manufacturing the flame-resistant and sound- and vibration-insulating member is also disclosed.
대표청구항
▼
1. A flame-resistant and sound- and vibration-insulating member for a vehicle, comprising a soft polyurethane foam formed by a reaction between an organic polyisocyanate component and a polyol component, wherein an improvement comprises:said organic polyisocyanate component including as a major comp
1. A flame-resistant and sound- and vibration-insulating member for a vehicle, comprising a soft polyurethane foam formed by a reaction between an organic polyisocyanate component and a polyol component, wherein an improvement comprises:said organic polyisocyanate component including as a major component thereof a monomeric MDI which includes diphenylmethane diisocyanate and further includes a reaction product of carbodiimide and/or uretone imine groups, said reaction product being obtained by carbodiimidizing isocyanate groups of diphenylmethane diisocyanate, said monomeric MDI containing 29-33% of NCO and including 1-45% by weight of 2, 4′-diphenylmethane diisocyanate in the form of a monomer and/or a carbodiimidization product thereof; andsaid polyol component including at least 50% by weight of polyol having 2-8 functional groups and a molecular weight of 1000-10000,wherein said organic polyisocyanate component does not include a polymeric MDI consisting of a crude MDI having at least three benzene rings in a molecule, or includes the polymeric MDI such that a content of said polymeric MDI with respect to a sum of said monomeric MDI and said polymeric MDI is not larger than 5% by weight,and wherein said soft polyurethane foam has a density of 40-150 kg/m 3 , a 50% compressive load of (5-60)×10 −2 N/mm 2 , a tensile strength of at least 120 kPa and an elongation of at least 50%, and exhibits flame resistance under a flammability test according to FMVSS-302 (Federal Motor Vehicle Safety Standards. USA). 2. A process of manufacturing a flame-resistant and sound- and vibration-insulating member for a vehicle, comprising a soft polyurethane foam formed by a reaction between an organic polyisocyanate component and a polyol component, said process comprising the steps of:preparing said organic polyisocyanate component such that said organic polyisocyanate component includes as a major component thereof diphenylmethane diisocyanate and further includes a reaction product containing carbodiimide and/or uretone imine groups, said reaction product being obtained by carbodiimidizing isocyanate groups of diphenylmethane diisocyanate, said monomeric MDI containing 29-33% of NCO and including MDI including 1-45% by weight of 2,4′-diphenylmethane diisocyanate in the form of a monomer and/or a carbodiimidization product thereof, wherein said organic polyisocyanate component does not include a polymeric MDI consisting of a crude MDI having at least three benzene rings in a molecule, or includes the polymeric MDI such that a content of said polymeric MDI with respect to a sum of said monomeric MDI and said polymeric MDI is not larger than 5% by weight;preparing said polyol component such that said polyol component includes at least 50% by weight of polyol having 2-8 functional groups and a molecular weight of 1000-10000; andcausing a reaction between said organic polyisocyanate component and said polyol component, to form said soft polyurethane foam, such that a NCO/OH index is held within a range of 0.6-1.2,and wherein said soft polyurethane foam has a density of 40-150 kg/M 3 , a 50% compressive load of (5-60)×10 −2 N/mm 2 , a tensile strength of at least 120 kPa and an elongation of at least 50%, and exhibits flame resistance under a flammability test according to FMVSS-302 (Federal Motor Vehicle Safety Standards, USA). 3. A flame-resistant and sound- and vibration-insulating member according to claim 1, wherein a content of NCO in said monomeric MDI is held within a range of 30.5-32.5%. 4. A flame-resistant and sound- and vibration-insulating member according to claim 1, wherein each of said tensile strength and said elongation of said soft polyurethane foam after a heat deterioration test for 50 hours at 160° C. is at least 50% of those before said heat deterioration test. 5. A process according to claim 2, wherein said reaction between said polyisocyanate component and said polyol compo nent takes place in the presence of a foaming agent. 6. A flame-resistant and sound-and-vibration-insulating member according to claim 1, wherein said soft polyurethane foam exhibits flame resistance in the absence of a flame retardant. 7. A process according to claim 2, wherein said soft polyurethane foam exhibits flame resistance in absence of a flame retardant.
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