Invention Grant
US07824773B2 Shrink labels of oriented polystyrene film containing small rubber particles and low rubber particle gel content and block copolymers
有权
收缩包含小橡胶颗粒和低橡胶颗粒凝胶含量的定向聚苯乙烯薄膜的标签和嵌段共聚物
- Patent Title: Shrink labels of oriented polystyrene film containing small rubber particles and low rubber particle gel content and block copolymers
- Patent Title (中): 收缩包含小橡胶颗粒和低橡胶颗粒凝胶含量的定向聚苯乙烯薄膜的标签和嵌段共聚物
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Application No.: US12306994Application Date: 2006-07-27
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Publication No.: US07824773B2Publication Date: 2010-11-02
- Inventor: Robert L. McGee , Stephen J. Skapik, III
- Applicant: Robert L. McGee , Stephen J. Skapik, III
- Applicant Address: US MI Midland
- Assignee: Dow Global Technologies Inc.
- Current Assignee: Dow Global Technologies Inc.
- Current Assignee Address: US MI Midland
- International Application: PCT/US2006/029493 WO 20060727
- International Announcement: WO2008/013542 WO 20080131
- Main IPC: B32B3/10
- IPC: B32B3/10 ; G09F3/02 ; C08L51/00

Abstract:
A polymer composition containing (a) a high impact polystyrene (HIPS) component with a block copolymer grafted to polystyrene, a rubbery conjugated diene content of one to seven weight percent based on HIPS weight, less than 10 weight-percent gel concentration, an average rubber particle size of between one and 0.01 micrometers, about 40 to about 90 volume percent of the rubber particles have diameters of less than about 0.4 microns and from about 10 to about 60 volume percent of the rubber particles have diameters between about 0.4 and about 2.5 microns, a majority of rubber particles with a core/shell morphology and a concentration that accounts for 10 to 70 weight-percent of the total polymer composition weight and one to five weight-percent rubbery diene based on total polymer composition weight; (b) from 10 to 70 weight percent of a general purpose polystyrene and from about 2 to about 80 weight-percent of a styrene block copolymer component, both based on total polymer composition weight. In a film, preferably oriented, wherein the polymer composition accounts for at least 95 weight-percent of the film, with the balance of the film or film composition weight being additives. Shrink labels are made from the film.
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