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Hot melt adhesive composition

A composition and adhesive technology, applied in the direction of adhesives, etc., can solve the problems of hot-melt adhesive preparation in synthetic waxes

Active Publication Date: 2020-01-14
HB FULLER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Synthetic waxes also tend to present hot melt adhesive formulation issues

Method used

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  • Hot melt adhesive composition
  • Hot melt adhesive composition
  • Hot melt adhesive composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0080] test program

[0081] The test procedures used in the examples include the following procedures. Unless otherwise indicated, all ratios and percentages are by weight. Unless otherwise specified, the procedure is performed at room temperature (ie, ambient temperature from about 20°C to about 25°C) and ambient humidity (ie, 30% to 70%).

[0082] Viscosity test method

[0083] According to ASTM D-3236 titled "Standard Test Method for Apparent viscosity of Hot Melt Adhesives and Coating Materials" (October 31, 1988), use Brookfield viscometer, Brookfield Thermosel heated sample chamber and No. 27 spindle to determine viscosity. The results are reported in centipoise (cP).

[0084] Curing time test method

[0085] Using the MEC ASM-15N hot-melt bonding simulator, beads of adhesive composition with a size of 5.08 cm×0.24 cm were applied to the first substrate of WESTROCK 44 pounds of ECT 100% recycled linerboard. The temperature at which the adhesive composition is applied to t...

Embodiment E1-E7

[0100] Examples E1-E7 and controls C1 and C2

[0101] By mixing the components in the amounts specified in Table 1 (weight %), and heating the mixture at 175°C to 190°C while stirring, Examples E1-E7 and controls C1 and C2 were prepared. Examples E1-E7 and controls C1 and C2 were subsequently tested according to viscosity, curing time, fiber tear% and PAFT test method. The difference is that the viscosity was measured at 177°C, 149°C or 135°C as indicated in the table , And curing time and fiber tear% were measured at an application temperature of 177°C or 149°C as indicated in the table. Also determine clarity and homogeneity. The results are reported in Table 1.

[0102]

[0103]

[0104] 1 = AFFINITY GA-1950 ethylene-octene interpolymer (DowDuPont Chemicals Company, Midland, Michigan, USA)

[0105] 2 = AFFINITY GA-1900 ethylene-octene interpolymer (DowDuPont Chemicals Company, Midland, Michigan, U.S.A., Midland, Michigan)

[0106] 3=ATEVA 1880A ethylene-vinyl acetate copolymer ...

Embodiment E8-E16 and C3

[0125] Examples E8-E16 and C3 were prepared by mixing the components in the amounts (% by weight) specified in Table 2 and heating the mixture at 175°C to 190°C while stirring. Examples E8-E16 and C3 were subsequently tested according to viscosity, curing time, fiber tear% and PAFT test method. The difference is that the viscosity was measured at 177°C, 149°C or 135°C as indicated in the table and cured Time and% fiber tear are measured at an application temperature of 177°C or 149°C as indicated in the table. Also determine clarity and homogeneity. The results are reported in Table 2.

[0126]

[0127]

[0128] 20 = AFFINITY GA-1000R maleic anhydride modified ethylene-octene copolymer (DowDuPont Chemicals Company, Midland, Michigan, U.S.A., Midland, Michigan)

[0129] 21 = TRECORA CWP-400 polyethylene wax (Trecora Chemical (Trecora Chemical, Pasadena, Texas), Pasadena, Texas, USA)

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Abstract

A hot melt adhesive composition that includes a first ethylene-alpha-olefin copolymer having a density of no greater than 0.90 grams per cubic centimeter, a second styrene block copolymer, tackifyingagent, synthetic wax having a melting point of at least 70 DEG C and a heat of fusion of at least 200 Joules / gram, and a third polymer selected from the group consisting of ethylene-polar comonomer copolymer derived from at least 90 mole % ethylene and no greater than 10 mole % co-monomer, propylene-alpha-olefin copolymer derived from at least 8 mole % co-monomer, exhibiting a heat of fusion of from at least 5 J / g to no greater than 60 J / g, and having a polydispersity index of no greater than 10, and propylene homopolymer exhibiting a heat of fusion of from at least 5 J / g to no greater than 60J / g.

Description

Background technique [0001] The present invention relates to formulating a hot melt adhesive composition that exhibits strong bonding, fast curing time, and good low-temperature bonding characteristics. [0002] Hot melt adhesive compositions are generally used to bond two substrates together and apply to the substrates in a molten state. To be commercially viable, most hot melt adhesive compositions must maintain adhesion to the substrate at room temperature, and in order to be suitable for high-speed packaging operations, the adhesive must also exhibit rapid curing time and fiber tearing. Bonding. For many applications, it is also desirable for the adhesive to exhibit fiber tear bonding at low temperatures. [0003] Many different types of polymers are used in various hot melt adhesive compositions. However, it is often difficult to combine different types of polymers in the same composition because the polymers tend to be incompatible with each other, phase separation during h...

Claims

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Application Information

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IPC IPC(8): C09J123/08C09J123/12C09J123/14C08L23/08C08L53/00
CPCC09J123/0815C09J123/0853C09J123/12C09J123/14C08L2205/03C08L2205/035C08L23/0853C08L53/025C08L23/14C08L23/0869C08L23/0815C08L51/06C08L23/12C09J165/00
Inventor B·艾池勒-约翰逊T·F·考夫曼J·E·威尔顿A·R·米歇尔
Owner HB FULLER CO