Free radical initiator modified hot melt adhesive composition including functionalized polyethylene and propylene-alpha-olefin polymer

A technology of hot melt adhesive and olefin polymer, applied in the direction of graft polymer adhesive, adhesive type, adhesive, etc., can solve problems such as inappropriateness, achieve good fiber tearability, good thermal stability sexual effect

Inactive Publication Date: 2014-03-19
HB FULLER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These properties are unfavorable for applications requiring short open times and non-tackiness after curing

Method used

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  • Free radical initiator modified hot melt adhesive composition including functionalized polyethylene and propylene-alpha-olefin polymer
  • Free radical initiator modified hot melt adhesive composition including functionalized polyethylene and propylene-alpha-olefin polymer
  • Free radical initiator modified hot melt adhesive composition including functionalized polyethylene and propylene-alpha-olefin polymer

Examples

Experimental program
Comparison scheme
Effect test

example

[0093] test program

[0094] The test programs used for the examples include the following programs. All ratios and percentages are by weight unless otherwise indicated.

[0095] thermal stability

[0096] thermal conditioning program

[0097] A 200 gram (g) sample of the hot melt composition was placed in a 400 milliliter (ml) PYREX glass beaker and held at 350°F (177°C) for 24 hours, 48 ​​hours, 72 hours, and 96 hours.

[0098] Gardner color

[0099] The samples were conditioned according to the thermal conditioning procedure and then tested (in the molten state) to determine the Gardner color by comparing the color of the sample against the Gardner color standard described in ASTM D-1544. The comparison was performed using a Gardner Delta comparator equipped with lighting, available from Pacific Scientific, Bethesda, Maryland.

[0100] Clarity

[0101] The samples were conditioned according to the thermal conditioning procedure and then visually inspected fo...

example 1-18

[0132] The hot-melt adhesive compositions of Examples 1-18 were prepared from bases 1, 2, 5, 6, 7, 8, 8a, 10, 11 and 12 by mixing the base with 1.0% by weight of IRGAFOS168 antioxidant, 0.5% by weight % of IRGANOX 1010 antioxidant and optional additional components (eg, waxes and polymers) were melt blended in the amounts shown in Table 2 (weight %). The hot melt adhesive compositions of Examples 1-14 were tested according to the Viscosity, Fiber Tear, and Set Time Test Methods and the results are shown in Table 3. The initial clarity and the observed clarity after 48 hours and 96 hours at 350°F (177°C) are also recorded in Table 3.

[0133]

[0134]

[0135]

[0136]

example 19

[0138] Radiation curable hot melts were prepared by treating a composition comprising the following components with 1.0 weight percent LUPEROX 101 organic peroxide under vacuum at a pressure of about 29 inches of mercury (Hg) and a temperature of about 175°C to about 190°C Adhesive composition: 70.85% by weight of a propylene-α-olefin copolymer of 65% by weight propylene and 35% by weight butene having a viscosity of 6,500 cps at 190°C, 4.48% by weight of A-C-X1783 maleated linear low Density polyethylene wax, 3.00% by weight adipic acid and 0.45% by weight IRGANOX 1010 antioxidant, treatment time was about 45 minutes. The resulting reaction product was then mixed with 3% by weight of IRGACURE184, 10.00% by weight of EASTOTAC H-100E tackifier, 8.52% by weight of N21 polyethylene wax, 1.20% by weight of AC596 maleated polypropylene wax and 0.50% by weight of IRGANOX1010 anti- Oxidants combine.

[0139] The composition is then exposed to UV radiation having a wavelength of 280n...

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Abstract

A hot melt adhesive composition that includes a first copolymer that includes the reaction product of a functionalized polyethylene, a propylene-alpha-olefin polymer that includes at least 50 mole % propylene and has a viscosity of no greater than 10,000 centipoise at 190 DEG C, a ratio of z average molecular weight (Mz) to number average molecular weight (Mn) (Mz / Mn) of greater than 20, and a ratio of Mz to weight average molecular weight (Mw) (Mz / Mw) of greater than 3.0, and a free radical initiator.

Description

[0001] Cross references to related patent applications [0002] This application claims the benefit of US Provisional Patent Application Serial No. 61 / 501,585, filed June 27, 2011 and incorporated herein. Background technique [0003] This invention relates to the formulation of hot melt adhesive compositions based on propylene-alpha-olefin polymers. [0004] Hot melt adhesive compositions are used in a wide variety of applications requiring the bonding of two substrates together including, for example, packaging applications (e.g., corrugated board and paperboard), nonwoven applications (e.g., disposables), bookbinding and shoemaking. Hot melt adhesive compositions are typically applied in a molten state and form a bond as it cools and solidifies. The time required for a hot melt adhesive to cool to a point where it has sufficient strength to form a bond is known as the "set time". Set time is an important parameter in applications that require high-speed processing operat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/14C09J151/06
CPCC09J123/14C09J151/06C08L51/06
Inventor R·A·米勒K·戴维斯`S·M·维尔金格S·U·阿哈迈德T·W·罗斯卡
Owner HB FULLER CO
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