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Improved products with gap

A product and void technology, which is applied in temperature recording, transportation and packaging, and thin material processing, etc., can solve the problems of poor nucleation of voids around solid particles, yellowing of products or unsatisfactory thermal stability, and achieve uniform size Effect

Inactive Publication Date: 2003-07-09
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some serious problems associated with this method are: (1) agglomeration and particle size control, (2) abrasion of extrusion equipment, guide rolls and knives, (3) high specific gravity of these solids, (4) due to the relative Poor nucleation of voids around solid particles due to low heat shrinkage of liquids and wetting and bonding of polymers to solid surfaces, (5) cost of these materials based on volume, and (6) general handling and handling issues
[0010] The problem to be solved with shaped articles containing said crosslinked microbeads is the unsatisfactory tendency of the article to yellow or to be thermally stable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] A Leistritz 27 mm twin-screw continuous mixer heated to 270 °C was used to mix 1.7 μm poly(methyl methacrylate) beads cross-linked with 30% divinylbenzene with 1:1 poly(ethylene terephthalate). Esters) ("PET", #7352 sold by Eastman Chemicals) and PETG6763 (polyester copolymer produced by Eastman Chemicals) were blended. All components are metered into the compounder, one mix is ​​sufficient to disperse the beads in the polyester matrix. Beads were added to bring the beads to 30% volume fill. The mixed material is extruded through a wire die, cooled in a water bath and pelletized. The particles were then dried in a desiccant oven at 65°C for 12 hours.

[0080] The mixed granules were extruded using a 2-1 / 2 inch flake extruder to obtain flakes. The melt stream at 270°C was fed into a 7 inch film die which was also heated to 270°C. Casting was performed on quenched rolls at 55°C as the extruded sheet came out of the die. The final dimensions of the continuous cast she...

Embodiment 2

[0082] In another example for evaluating samples, 1.7 μm poly(methyl methacrylate) beads cross-linked with 30% 1,6-hexanediol diacrylate were used instead of the 30% divinyl beads cross-linked in Example 1. 1.7 μm poly(methyl methacrylate) beads of benzene. The same process as Example 1 was used and the same physical dimensions as Example 1 were obtained.

Embodiment 3

[0084] In another example, also intended for sample evaluation, 1.7 μm poly(methyl methacrylate) beads cross-linked with 30% ethylene glycol dimethacrylate were used instead of the 1.7 μm cross-linked 30 % divinylbenzene poly(methyl methacrylate beads). The same process as Example 1 was used and the same physical dimensions as Example 1 were obtained. However, during the extrusion process, the extrudate emitted smoke and noxious fumes, which indicated that the thermal stability of the microbeads was unacceptable. Didn't get a sample. Preparation of Dye Receiving Elements

[0085] Thermal dye receiving elements were prepared from the above microvoided support by sequentially coating the following coatings on the surface of the above microvoided support.

[0086] a) Adhesive layer containing Prosil 221 (0.055g / m2) in ethanol-methanol-water solvent mixture 2 ) and Prosil 2210 (0.055g / m2) (PCR Inc.) (both organosiloxanes) and LiCl (0.0033g / m 2 ). The obtained solution (0.113...

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Abstract

Disclosed is a shaped article comprising a continuous first polymer phase having dispersed therein microbeads of a cross-linked second polymer, which microbeads are bordered by void space, wherein the monomers from which the second polymer is derived are selected to provide microbeads that are both low-yellowing and thermally stable.

Description

technical field [0001] The present invention relates to shaped articles having an oriented continuous phase of a first polymer and dispersed therein microbeads of a second polymer bounded at least in part by interstices wherein, by selection, monomers of the second polymer are obtained to provide low yellowing and heat stable microbeads. Background technique [0002] Mixing linear polyesters with other incompatible organic or inorganic based materials to form microporous structures is well known in the art. For example, U.S. Patent 3,154,461 discloses linear polyesters as mixed with calcium carbonate. Patent U.S. 3,944,699 discloses blends of linear polyesters with 3-27% organic materials such as ethylene or propylene polymers. Patent U.S. 3,640,944 also discloses the use of poly(ethylene terephthalate) mixed with 8% organic material such as polysulfone or poly(4-methyl-1-pentene). Patent U.S. 4,377,616 discloses that polypropylene as a matrix is ​​mixed with a minor perc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/00B41M5/41C08L101/00
CPCY10T428/1352C08L101/00Y10T428/139B41M5/41C08L2666/04
Inventor D·E·史密斯T·M·龚T·M·拉尼J·L·米尔鲍尔
Owner EASTMAN KODAK CO
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