Thermoplastic elastomer compounds exhibiting shape memory via thermo-mechanical action
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08L-067/04
C08L-051/06
C08L-053/00
C08L-091/06
C08L-091/00
C08L-053/02
출원번호
US-0019173
(2016-02-09)
등록번호
US-9951220
(2018-04-24)
발명자
/ 주소
Xu, Liang
출원인 / 주소
PolyOne Corporation
대리인 / 주소
Sambrook, Michael J.
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
A thermoplastic elastomer compound has a high strain recovery rate and a high strain fixity rate to provide shape memory, preferably manageable shape memory. The thermoplastic elastomer compound includes a maleated styrenic block copolymer and polycaprolactone to achieve the shape memory. Shape mode
A thermoplastic elastomer compound has a high strain recovery rate and a high strain fixity rate to provide shape memory, preferably manageable shape memory. The thermoplastic elastomer compound includes a maleated styrenic block copolymer and polycaprolactone to achieve the shape memory. Shape modes of articles made from the thermoplastic elastomer compound can be altered by at least one thermo-mechanical event to cause deformation of the compound from a first shape to a second shape with retention of the compound in the second shape for any reasonable time interval.
대표청구항▼
1. A thermoplastic elastomer compound comprising: (a) from about 20 to about 40 weight percent, by weight of the thermoplastic elastomer compound, of maleated polystyrene-poly(ethylene-butylene)-polystyrene block copolymer;(b) from about 5 to about 35 weight percent, by weight of the thermoplastic e
1. A thermoplastic elastomer compound comprising: (a) from about 20 to about 40 weight percent, by weight of the thermoplastic elastomer compound, of maleated polystyrene-poly(ethylene-butylene)-polystyrene block copolymer;(b) from about 5 to about 35 weight percent, by weight of the thermoplastic elastomer compound, of polycaprolactone;(c) from about 35 to about 55 weight percent, by weight of the thermoplastic elastomer compound, of plasticizer; and(d) from about 2 to about 5 weight percent, by weight of the thermoplastic elastomer compound, of polyolefin;wherein the thermoplastic elastomer compound has shape memory. 2. The thermoplastic elastomer compound of claim 1, wherein the thermoplastic elastomer compound further comprises one or more additives selected from the group consisting of adhesion promoters; biocides; anti-fogging agents; anti-oxidants; anti-static agents; blowing agents; dispersants; extenders; fillers; flame retardants; foaming agents; smoke suppressants; impact modifiers; initiators; lubricants; micas; pigments; colorants; dyes; oils; processing aids; release agents; silanes; titanates; zirconates; slip agents; anti-blocking agents; stabilizers; stearates; ultraviolet light absorbers; viscosity regulators; waxes; and combinations of these additives. 3. The thermoplastic elastomer compound of claim 1, wherein the thermoplastic elastomer compound has a strain recovery rate of at least 65%. 4. The thermoplastic elastomer compound of claim 1, wherein the thermoplastic elastomer compound has a strain fixity rate of at least 65%. 5. The thermoplastic elastomer compound of claim 1, wherein the thermoplastic elastomer compound comprises: (a) from about 20 to about 30 weight percent, by weight of the thermoplastic elastomer compound, of the maleated polystyrene-poly(ethylene-butylene)-polystyrene block copolymer;(b) from about 25 to about 30 weight percent, by weight of the thermoplastic elastomer compound, of the polycaprolactone;(c) from about 40 to about 45 weight percent, by weight of the thermoplastic elastomer compound, of the plasticizer; and(d) from about 3 to about 4 weight percent, by weight of the thermoplastic elastomer compound, of the polyolefin;wherein the thermoplastic elastomer compound has a strain recovery rate of at least 90%; andwherein the thermoplastic elastomer compound has a strain fixity rate of at least 90%. 6. The thermoplastic elastomer compound of claim 5, wherein the maleated polystyrene-poly(ethylene-butylene)-polystyrene block copolymer has a weight average molecular weight of about 250,000 and a styrene content of about 32 weight percent. 7. The thermoplastic elastomer compound of claim 5, wherein the polycaprolactone has a weight average molecular weight ranging from about 10,000 to about 80,000. 8. The thermoplastic elastomer compound of claim 5, wherein the plasticizer is mineral oil. 9. The thermoplastic elastomer compound of claim 5, wherein the polyolefin is polypropylene. 10. The thermoplastic elastomer compound of claim 5, further comprising one or more additives selected from the group consisting of phenolic antioxidants, phosphite stabilizers, and waxes. 11. The thermoplastic elastomer compound of claim 1, wherein the thermoplastic elastomer compound is in the form of extruded pellets. 12. An article molded from the thermoplastic elastomer compound of claim 1. 13. The article of claim 12, wherein the article is an injection molded article. 14. The article of claim 12, wherein the article has a Shore A hardness of less than about 60. 15. A method of using the article of claim 12, the method comprising the steps of: (a) performing a thermo-mechanical event on the article; and(b) optionally, performing a second thermo-mechanical event on the article;wherein the article expands or contracts in at least one dimension of the article with each of step (a) and optional step (b) either sequentially or concurrently.
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