IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0935783
(1992-08-27)
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발명자
/ 주소 |
- Rogers John E. (Saratoga Springs NY) Kisner Ronnie D. (Queensbury NY)
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출원인 / 주소 |
- Astro-Valcour, Inc. (Glens Falls NY 02)
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인용정보 |
피인용 횟수 :
32 인용 특허 :
0 |
초록
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A foamable composition for producing an ultra low density polyolefin foam having a density of about 0.6 to about 1.5 pounds per cubic foot comprising a heat-plastified mixture comprising (1) an olefin polymer resin selected from the group consisting of ethylene homopolymers and copolymers of ethylen
A foamable composition for producing an ultra low density polyolefin foam having a density of about 0.6 to about 1.5 pounds per cubic foot comprising a heat-plastified mixture comprising (1) an olefin polymer resin selected from the group consisting of ethylene homopolymers and copolymers of ethylene and a copolymerizable monomer; (2) an elastomer in an amount of about 3 to about 30 wt. parts per 100 wt. parts of said olefin polymer resin; (3) polystyrene in an amount of about 1 to about 15 wt. parts per 100 wt. parts of said olefin polymer resin; (4) a stability control agent selected from the group consisting of partial esters of long chain fatty acids with polyols, higher alkyl amines, fatty acid amides, and olefinically unsaturated carboxylic acid copolymers, and (5) a hydrocarbon blowing agent having from 1 to 6 carbon atoms and a boiling point between -175°C. and 50°C., said heat-plastified mixture being at a temperature and a pressure which does not allow said mixture to expand, said low density polyolefin foam made from said foamable composition and process of making said foam.
대표청구항
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A process for producing a polyolefin foam having a density of about 0.6 to about 1.5 pounds per cubic foot comprising (a) mixing and heat plastifying (1) an olefin polymer resin selected from the group consisting of low, medium, or high density polyethylene, ethylene-vinyl acetate copolymers, ethyle
A process for producing a polyolefin foam having a density of about 0.6 to about 1.5 pounds per cubic foot comprising (a) mixing and heat plastifying (1) an olefin polymer resin selected from the group consisting of low, medium, or high density polyethylene, ethylene-vinyl acetate copolymers, ethylene-1-butene copolymers, ethylene-butadiene copolymers, ethylene-vinyl chloride copolymers, ethylene-methyl methacrylate copolymers, ethylene-acrylonitrile copolymers, and ethylene-acrylic acid copolymers, (2) an elastomer selected from the group consisting of random styrene-butadiene rubber, natural rubber, butadiene rubber, isobutylene rubber, ethylene-propylene rubber, diene-modified ethylene-propylene rubber containing bound diene units derived from 1,4-hexadiene, diene-modified ethylene-propylene rubber containing bound diene units derived from dicyclopentadiene, diene-modified ethylene-propylene rubber containing bound diene units derived from ethylidene norbornene, acrylonitrile rubber, acrylonitrile-butadiene copolymer rubber, styrene-butadiene block copolymer rubber, poly(2-chlorobutadiene-1,3), synthetic polyisoprene, chlorinated copolymers of isobutylene and chlorosulfonated polyethylene in an amount of about 3 to about 30 wt. parts per 100 wt. parts of said olefin polymer resin, and (3) polystyrene in an amount of about 1 to about 15 wt. parts per 100 wt. parts of said olefin polymer resin; (b) admixing the resulting heat plastified mixture with (4) a stability control agent selected from the group consisting of partial esters of long chain fatty acids with polyols, higher alkyl amines, fatty acid amides, and olefinically unsaturated carboxylic acid copolymers, and (5) a hydrocarbon blowing agent having from 1 to 6 carbon atoms and a boiling point between -175°C. and 50°C.; and (c) activating said blowing agent to foam the resulting admixture to a substantially closed cell polyolefin foam having a density of about 0.6 to about 1.5 pounds per cubic foot.
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