Unlock instant, AI-driven research and patent intelligence for your innovation.

Heat sealable compositions from aqueous dispersions

A dispersion and heat sealing technology, applied in the direction of coating, etc., can solve the problem of not being able to provide processing flexibility

Inactive Publication Date: 2009-03-11
DOW GLOBAL TECH LLC
View PDF21 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, however, known encapsulation materials do not provide the desired balance of overall properties and / or process flexibility required by converters and encapsulation machines

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Heat sealable compositions from aqueous dispersions
  • Heat sealable compositions from aqueous dispersions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0062] In a twin-screw extruder, 100 parts by weight of a thermoplastic ethylene / acrylic acid copolymer having an acrylic acid content of 20.5% by weight and a density of approx. 0.958g / cm 3 (ASTM D-792), the melting coefficient is 13.5g / 10min (obtained by ASTM D1238 at 125°C and 2.16kg), Mw / Mn is 3.7, and the melting point is about 77°C (obtained by DSC at a scanning speed of 10°C / min ), commercially available from The Dow Chemical Company under the designation PRIMACOR 59801.

[0063] To this melt-kneaded resin, a 45% by weight aqueous solution of potassium hydroxide (in a proportion of 16.5% by weight to the total amount of the mixture) was continuously fed at a rate of 1.8 kg / hour at a downstream injection port. The resulting aqueous dispersion was then diluted with additional water at a rate of 26.9 kg / hour before leaving the extruder. An aqueous dispersion was thus obtained which had a solids content of 26.6% by weight, a pH of 9.9 and a Brookfield viscosity of 224 cp ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A dispersion that includes (A) an ethylene-acid copolymer; (B) a neutralizing agent; and (C) water, wherein the neutralizing agent is present in an amount sufficient to neutralize greater than 55% by weight of the carboxyl groups in component (A) is disclosed. Also, a dispersion that includes (A) an ethylene-acid copolymer; (B) a strong base, having a pKa of about 10 or greater; (C) water, wherein the strong base is the sole neutralizing agent and is present in an amount sufficient to neutralize greater than 55% by weight of the carboxyl groups in component (A) is disclosed.

Description

[0001] CROSS REFERENCE TO THIS APPLICATION [0002] This application claims priority to US Provisional Patent Application 60 / 774,933, filed February 17, 2006, the disclosure of which is incorporated herein by reference. technical field [0003] The present invention generally relates to aqueous dispersions and dispersion compositions for use in heat sealing compositions. Background technique [0004] A particular use of coatings made from dispersions is in packaging and storage containers. For application, a balance of application properties is required, for example, low heat seal initiation temperature, high hot tack strength, wide hot sealing window, good interlayer are required Adhesion and high softening point. [0005] The commercial importance of balanced heat sealing performance is well known. That is, a low heat-sealing initiation temperature is very important for increasing sealing speed and reducing energy consumption. A wide heat sealing window is important to...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09D123/08
Inventor G·M·斯坦博格B·M·蒙克拉M·J·卡利诺夫斯基
Owner DOW GLOBAL TECH LLC