Abstract:
Provided are low-density sealing compositions having high tensile strength and a method of producing the same. The sealing compositions may contain a polyvinyl chloride resin, surface-treated hollow glass microspheres and a plasticizer, and contains 30 to 60 vol % hollow glass microsphere.
Abstract:
Silica coated glass bubbles comprising a glass bubble and a silica coating in direct contact with the outer surface of the bubble, wherein the silica coating is substantially free of silanol groups. A composite comprising a polymer and a plurality of the silica coated glass bubbles dispersed therein. Articles comprising the composite. Methods for making the silica coated glass bubbles.
Abstract:
The present disclosure relates to a thermally conductive pressure sensitive adhesive composition, comprising: a) an acrylic polymer component; and b) a boron nitride mixture composition comprising: i. anisotropic boron nitride agglomerates comprising hexagonal boron nitride primary particles, wherein the hexagonal boron nitride primary particles have an average primary particle size d50 comprised between 1 and 50 micrometer, wherein the anisotropic boron nitride agglomerates have an average agglomerate size d50 comprised between 50 and 250 micrometer and an aspect ratio greater than 1.5, and wherein the envelope density of the anisotropic boron nitride agglomerates is greater than 1 g/cm3?, when measured according to the test method described in the experimental section; and ii. (optionally), free hexagonal boron nitride primary particles having an average primary particle size d50 comprised between 3 and 50 micrometer; and wherein the content of the boron nitride mixture composition is greater than 15 vol %, based on the volume of the thermally conductive pressure sensitive adhesive composition. The present disclosure also relates to a method of manufacturing such thermally conductive pressure sensitive adhesives and uses thereof.
Abstract:
The present disclosure provides a plurality of glass bubbles having an average true density of up to about 0.55 grams per cubic centimeter and a size distribution including a median size in a range from about 15 micrometers to 40 micrometers. A hydrostatic pressure at which ten percent by volume of the plurality of glass bubbles collapses is at least about 100 megapascals. In some embodiments, the plurality of glass bubbles is a graded fraction preparable by classifying a second plurality of glass bubbles, wherein the second plurality of glass bubbles has a higher percentage of glass bubbles with a size of up to ten micrometers than the first plurality of glass bubbles. Composites including the plurality of glass bubbles are also disclosed.