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Propylene-alpha-olefin polymers, hot melt adhesive compositions that include propylene-alpha-olefin polymers and articles that include the same

A technology for hot melt adhesives and olefin polymers, which is applied in the field of the ratio of z-average molecular weight (Mz) to number-average molecular weight (Mn) (Mz/M), which can solve problems such as inappropriateness

Inactive Publication Date: 2014-03-05
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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  • Propylene-alpha-olefin polymers, hot melt adhesive compositions that include propylene-alpha-olefin polymers and articles that include the same

Examples

Experimental program
Comparison scheme
Effect test

example

[0089] test program

[0090] The test programs used for the examples include the following programs.

[0091] Glass transition temperature (Tg), melting temperature (Tm) test method

[0092] Using Differential Scanning Calorimetry (DSC) according to ASTM E titled "Standard Test Method for Heats of Fusion and Crystallization by Differential Scanning Calorimetry" -793-06 Determination of glass transition temperature (Tg) and melting temperature (Tm) using the following conditions: heat the sample to 160°C, hold at 160°C for 5 minutes, quench to -60°C, and then heat the sample at 10°C per minute Rate heating from -60°C to 160°C. Results are reported in degrees Celsius (°C).

[0093] Heat of Fusion Test Method

[0094] The heat of fusion (ΔH ). Results are reported in joules per gram (J / g).

[0095] Crystallinity test method

[0096] Crystallinity was determined by differential scanning calorimetry as described in US Patent 7,521,507 at column 26, lines 8-27 and in...

example 1-7

[0140] The hot melt adhesive combinations of Examples 1-7 were prepared by combining 1.0% by weight of IRGAFOS 168 antioxidant, 0.5% by weight of IRGANOX 1010 antioxidant and the ingredients and their amounts shown in Table 3 with mixing at a temperature of 177°C thing.

[0141] Control 10

[0142] Control 10 was prepared in the same manner as in Examples 1-7 and contained the components shown in Table 3.

[0143] According to at least one of the test methods of viscosity, setting time and fiber tearing at -29°C, 22°C and 60°C, and the method for measuring room temperature specific gravity, the compositions of Examples 1-7 and Control 10 are recorded in Table 1. 4 in.

[0144] Examples 1, 2, 5, 6 and Control 10 were tested according to the method for determining specific gravity at room temperature using isopropanol with a specific gravity of 0.785 as the isopropanol test solution.

[0145] table 3

[0146] sample

polymer

Polymer wt%

MAPP 1 weigh...

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Abstract

A propylene-alpha-olefin polymer that includes at least 50% by weight propylene, has a ratio of z average molecular weight (Mz) to number average molecular weight (Mn) (Mz / Mn) from greater than 20 to no greater than 50, and a ratio of Mz to weight average molecular weight (Mw) (Mz / Mw) of greater than 2.5, and exhibits a viscosity of no greater than 2,500 centipoise at 190 DEG C, and a hot melt adhesive composition that includes the propylene-alpha-olefin polymer, a first wax consisting of a functionalized wax, and a second wax different from the first wax, the adhesive composition exhibiting a viscosity of no greater than 2,500 centipoise at 177 DEG C.

Description

[0001] Cross references to related patent applications [0002] This patent application claims priority to US Provisional Patent Application Serial No. 61 / 501,578, filed June 27, 2011, which is incorporated herein. Background technique [0003] This invention relates to the formation of propylene-alpha-olefin polymers and the formulation of propylene-alpha-olefin polymer-based hot melt adhesive compositions. [0004] It is important for adhesives used in packaging applications to exhibit good bond strength and fast set times over a wide temperature range. [0005] Hot melt adhesive compositions formulated with amorphous polypropylene polymers are useful in a variety of applications. Many amorphous polypropylene polymers exhibit long open times, are very tacky immediately upon consolidation from the molten state and remain tacky for undesired times after consolidation. These properties are undesirable for applications requiring short open times and non-tackiness after curing....

Claims

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Application Information

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IPC IPC(8): C09J123/14C08L23/14
CPCC09J123/142C08L51/06C08L23/06C08L51/003C08L23/142C08L91/06C08L93/04C08L2205/03
Inventor K·戴维斯S·U·阿哈迈德S·M·维尔金格R·A·米勒P·西莫内
Owner HB FULLER CO
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