Energy-activated room temperature-pumpable polymer compositions and devices for activating and dispensing the same
View Patent ↗Energy-activated room temperature-pumpable polymer compositions, devices for activating and processing the same into solid cellular or non-cellular polymeric materials that can be used as adhesives, sealants, coatings or gasket materials, and methods of making and using the same. The compositions according to the invention include solid particles that include one or more polymers, which are emulsified, dispersed or suspended in a liquid carrier together with at least one processing aid, such as a reactive blowing agent, a low molecular weight surfactant, a high molecular weight surfactant, one or more compounds found in latex paint, starch, cellulosic derived products and combinations of two or more thereof. The processing aids provide various benefits including, for example, reduced density, improved process hygiene, improved foam stability, faster bonding times and/or lower processing temperatures.
1. A composition comprising:
a liquid carrier; and
solid particles disposed in the liquid carrier, the solid particles comprising a sustainable material selected from the group consisting of starches, derivatives of starches, cellulosic materials, derivatives of cellulosic materials and combinations thereof,
the composition being in a form selected from the group consisting of an emulsion, a dispersion, a suspension, and combinations thereof,
the composition being in a non-molten pumpable state at ambient temperatures of from about 32° F. to 140° F.,
the composition forming a substantially homogeneous, fused molten blend when first heated to a temperature greater than about 140° F., and
the substantially homogenous molten blend subsequently becoming a fused solid material when it cools to a temperature below 140° F.
2. The composition according to claim 1 wherein the solid particles comprising a sustainable material are one or more selected from the group consisting of dextrins, hydrogenated dextrins, polydextrose, maltodextrins, hydrogenated maltodextrins, corn syrup solids and hydrogenated starch hydrolysates.
3. The composition according to claim 1 wherein the starches, derivatives of starches, cellulosic materials and derivatives of cellulosic materials are hydrogenated.
4. The composition according to claim 1 wherein the liquid carrier is selected from the group consisting of animal oil, plant oil, glycerol, and water.
5. The composition of claim 1 wherein the liquid carrier is selected from the group consisting of animal oil and plant oil.
6. The composition of claim 1 wherein the liquid carrier is water.
7. The composition of claim 1 additionally comprising one or more materials selected from the group consisting of pigments, fillers and glass treated and untreated microspheres.
8. The composition of claim 1 additionally comprising one or more materials selected from the group consisting of aluminum hydroxide, titanium dioxide, kaolin, calcium carbonate, silica and silicates.
9. The composition of claim 1 wherein the solid particles comprising a sustainable material are present in an amount from 30% to 80% by weight of the composition.
10. An adhesive comprising the composition of claim 1 .
11. A package comprising one or more substrates adhered together using the composition of claim 1 .
12. The package of claim 11 wherein the one or more substrates comprise cellulose fibers.