Structures and fabricated articles having shape memory made...

C - Chemistry – Metallurgy – 08 – L

Patent

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C08L 23/08 (2006.01) A63H 3/44 (2006.01) A63H 9/00 (2006.01) C08L 25/06 (2006.01) C09J 123/08 (2006.01) D01F 8/06 (2006.01) C08L 23/16 (2006.01) C08L 27/06 (2006.01) C08L 53/02 (2006.01) C08L 55/02 (2006.01) C08L 67/00 (2006.01) C08L 77/00 (2006.01)

Patent

CA 2322571

The present invention pertains to structures and fabricated articles having shape/reshape behavior (and processes for their preparation) comprising: (A) from 1 to 100 weight percent (based on the combined weights of Components A and B) of at least one substantially random interpolymer having an I2 of 0.1 to 1,000 g/10 min and an Mw/Mn of from 1.5 to 20, which comprises: (1) from 38 to 65 mol percent of polymer units derived from: (a) at least one vinyl or vinylidene aromatic monomer, or (b) at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer, or (c) a combination of at least one aromatic vinyl or vinylidene monomer and at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer, and (2) from 35 to 62 mol percent of polymer units derived from ethylene and/or at least one C3-20 .alpha.-olefin; and (B) from 0 to 99 weight percent (based on the combined weights of Components A and B) of at least one polymer other than that of Component A; and (C) from 0 to 50 percent by weight (based on the combined weights of components A, B, C and D) of at least one tackifier; and (D) from 0 to 80 percent by weight (based on the combined weights of components A, B, C and D) of at least one filler.

La présente invention concerne des structures et des articles manufacturés à mémoire de forme (ainsi que leurs procédés de préparation), qui renferment: A) 1 à 100 pour cent en poids (sur la base des poids combinés des constituants A et B) d'au moins un copolymère sensiblement aléatoire présentant un I¿2? variant entre 0,1 et 1000 g/10 mn, et un rapport M¿w?/M¿n? situé entre 1,5 et 20, ce copolymère comprenant: 1) entre 38 et 65 pour cent molaire d'unités polymères dérivées de: a) au moins un monomère aromatique de vinyle ou de vinylidène; ou b) au moins un monomère encombré aliphatique ou cycloaliphatique de vinyle ou de vinylidène; ou c) une combinaison d'au moins un monomère aromatique de vinyle ou de vinylidène et d'au moins un monomère encombré aliphatique ou cycloaliphatique de vinyle ou de vinylidène, et 2) entre 35 et 62 pour cent molaire d'unités polymères dérivées d'éthylène, et/ou au moins une alpha-oléfine C¿3-20?; et B) entre 0 et 99 pour cent en poids (sur la base des poids combinés des constituants A et B) d'au moins un polymère différent du constituant A; et C) entre 0 et 50 pour cent en poids (sur la base des poids combinés des constituants A, B, C, et D) d'au moins un agent collant; et D) entre 0 et 80 pour cent en poids (sur la base des poids combinés des constituants A, B, C, et D) d'au moins une charge.

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