Amorphous-polypropylene-based hot melt adhesive
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08L-053/02
C08L-023/10
출원번호
US-0399366
(1989-08-28)
우선권정보
ZZX- (); JP-0082778 (1987-04-03)
발명자
/ 주소
Wakabayashi, Toshinori
Sugii, Shinji
출원인 / 주소
Minnesota Mining and Manufacturing Company
대리인 / 주소
Griswold, Gary L.Kirn, Walter N.Jordan, Robert H.
인용정보
피인용 횟수 :
20인용 특허 :
9
초록▼
A hot melt adhesive consisting essentially of amorphous polypropylene, styrene-based themoplastic elastomer, tackifier and wax having a dissipation factor of about 0.010 or less at 1 kilohertz at 23° C., and a volume resistivity of at least about 1×10 14 ohm-cm at 23° C. Such adhesives exhibit good
A hot melt adhesive consisting essentially of amorphous polypropylene, styrene-based themoplastic elastomer, tackifier and wax having a dissipation factor of about 0.010 or less at 1 kilohertz at 23° C., and a volume resistivity of at least about 1×10 14 ohm-cm at 23° C. Such adhesives exhibit good shear strength and shock resistance.
대표청구항▼
1. A composition consisting essentially of the following: (a) between about 10 and about 70 weight percent of amorphous polypropylene; (b) between about 2 and about 70 weight percent of styrene-based thermoplastic elastomer, said elastomer being styrene-diene block copolymer or hydrogenated styr
1. A composition consisting essentially of the following: (a) between about 10 and about 70 weight percent of amorphous polypropylene; (b) between about 2 and about 70 weight percent of styrene-based thermoplastic elastomer, said elastomer being styrene-diene block copolymer or hydrogenated styrene-diene block copolymer; (c) between about 1 and about 35 weight percent of tackifier: and (d) up to about 24 weight percent of wax; and having a dissipation factor of about 0.010 or less at 1 kilohertz at 23° C., and a volume resistivity of at least about 1×10 14 ohm-cm at 23° C. 2. The composition of claim 1 consisting essentially of the following: (a) between about 14 and about 50 weight percent of said amorphous polypropylene; (b) between about 2 and about 60 weight percent of said styrene-based elastomer; (c) between about 1 and about 25 weight percent of said tackifier; and (d) up to about 24 weight percent of said wax. 3. The composition of claim 1 wherein said amorphous polypropylene has a weight average molecular weight between about 10,000 and about 100,000. 4. The composition of claim 1 wherein said amorphous polypropylene has a weight average molecular weight between about 10,000 and about 50,000. 5. The composition of claim 1 wherein said amorphous polypropylene comprises at least one of: atactic polypropylene, and propylene copolymerized with a low molecular weight alkene. 6. The composition of claim 1 wherein said styrene-based elastomer has a repeating structure of A-B or A-B-A wherein A is polystyrene and B is a compatible soft segment copolymer. 7. The composition of claim 6 wherein said A blocks have a weight average molecular weight of between about 5,000 and about 125,000. 8. The composition of claim 6 wherein said A blocks have a weight average molecular weight of between about 8,000 and about 45,000. 9. The composition of claim 7 wherein said B blocks has a weight average molecular weight of between about 30,000 and about 125,000. 10. The composition of claim 6 wherein said B blocks have a weight average molecular weight of between about 50,000 and about 100,000. 11. The composition of claim 6 wherein the weight ratio of said A blocks to said B blocks is between about 1:4 and about 4:1. 12. The composition of claim 1 wherein said styrene-based thermoplastic elastomer comprises blocks of hard segments and blocks of soft segments, said soft segments being substantially saturated. 13. The composition of claim 1 wherein said tackifier is at least one of the following: polyterpenes, rosins, rosin esters and derivatives thereof, aliphatic and aromatic resins, modified terpenes, coumarone-indenes, polyesters, alkyl phenols, or styrene oligomers. 14. The composition of claim 1 wherein said wax is at least one of the following: low molecular weight polyethylene, microcrystalline wax, Fischer-Tropsch wax, or paraffin wax. 15. The composition of claim 1 further comprising at least one of the following: crystalline polyolefin, filler, colorant, or stabilizer. 16. The composition of claim 1 wherein said composition has a volume resistivity of between about 10 14 and about 10 17 ohm-cm at 23° C., a dielectric strength of between about 25 and about 50 kilovolts/millimeter, a dielectric constant of between about 2.3 and about 3.0 at 1 kilohertz, a dissipation factor of between about 0.0008 and about 0.010 at a 1 kilohertz at 23° C., and electrolytic corrosion after 1000 hours of between about 10 10 and about 10 12 ohms. 17. A method of bonding electronic components said method comprising using a composition consisting essentially of the following: (a) between about 10 and about 70 weight percent of amorphous polypropylene; (b) between about 2 and about 70 weight percent of styrene-based thermoplastic elastomer; (c) between about 1 and about 35 weight percent of tackifier; and (d) up to about b 24 weight percent of wax; wherein said composition has a dissipation factor of about 0.010 or less at 1 kilohertz at 23° C., and a volume resistivity of at least about 1×10 14 ohm-cm at 23°C.
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이 특허에 인용된 특허 (9)
Stenger Richard J. (Wilmington DE), Filling material for electric cable.
Runavot Yves (St. Maur des Fosses FRX) Billault Georges (Saint Quen FRX) Salvetat Jaques (Le Vesinet FRX), Hot melt adhesive compositions employing resins based on 2-methyl styrene, styrene and a phenol.
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