Siloxane dispersant and nanoparticle paste composition comprising the same
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsJae Ho Lee, Seong Jae Choi, Eun Sung Lee, Jae Young Choi
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Abstract
Provided is a siloxane dispersant having a structure including a head part having an affinity for nanoparticles and a tail part having an affinity for a polydimethylsiloxane (PDMS) resin, and a nanoparticle paste composition comprising the same. The dispersant significantly improves dispersion efficiency of a polydimethylsiloxane resin system which is used in preparation of high-output light sources such as UV LEDs and the like.
Claims13
A siloxane dispersant having a structure including a head part having affinity for nanoparticles and a tail part having affinity for a polydimethylsiloxane resin,
- wherein the siloxane dispersant contains the head part selected from the group consisting of:
- wherein each R is independently hydrogen or C1-C4 alkyl;
- or a group represented by
- the tail part selected from the group consisting of:
- wherein n is an integer of 2 to 30, and x and y are independently an integer of 2 to 20;
- or
- wherein the siloxane dispersant contains the head part selected from the group consisting of the formulas
- wherein each R is defined above, and the tail part is of the formula
- wherein x, and y are each defined above;
- or
- wherein the siloxane dispersant contains the head part of the formula
- wherein each R is as defined above, and the tail part is
- wherein x, and y are each defined above;
- or
- wherein the siloxane dispersant contains as the head part
- the tail part is
A nanoparticle paste composition comprising
- a siloxane dispersant having a structure including a head part having affinity for nanoparticles and a tail part having affinity for a polydimethylsiloxane resin, wherein the siloxane dispersant contains the head part selected from the group consisting of:
- wherein each R is independently hydrogen or C1-C4 alkyl;
- or a group represented by:
- the tail part selected from the group consisting of:
- wherein n is an integer of 2 to 30, and x and y are independently an integer of 2 to 20;
- or
- wherein the siloxane dispersant contains the head part selected from the group consisting of the formulas
- wherein each R is defined above, and the tail part is of the formula
- wherein x, and y are each defined above;
- or
- wherein the siloxane dispersant contains the head part selected from the group consisting of the formulas
- wherein each R is defined above, and the tail part is
- wherein x, and y are each defined above;
- or
- wherein the siloxane dispersant contains as the head part
- the tail part is
- wherein x, and y are each defined above;
- nanoparticles, and
- a polydimethylsiloxane resin,
- wherein the nanoparticles are selected from the group consisting of Group II-VI, Group III-V, Group IV-VI or Group IV compound semiconductors and metals.
A silicone rubber, formed by dispersing nanoparticles in a polydimethylsiloxane resin using a dispersant having a heterocyclic amine-based, diamine-based, triamine-based, carboxylic acid-based, mercaptan-based, or phosphonic acid-based head part, and a polydimethylsiloxane-based tail part, and adding a polydimethylsiloxane resin having an epoxy group to the resulting dispersion, followed by heat treatment.
A silicone rubber, comprising the heat-cured product of:
- nanoparticles,
- a dispersant having a heterocyclic amine-based, diamine-based, triamine-based, carboxylic acid-based, mercaptan-based, or phosphonic acid-based head part, and a polydimethylsiloxane-based tail part, and
- a polydimethylsiloxane resin having an epoxy group,
- wherein the nanoparticles are homogeneously dispersed, and wherein the silicone rubber exhibits homogeneous photoluminescence.
A method of forming a silicone rubber, comprising:
- dispersing nanoparticles in a polydimethylsiloxane resin using a dispersant having a heterocyclic amine-based, diamine-based, or triamine-based head part and a polydimethylsiloxane-based tail part,
- adding a polydimethylsiloxane resin having an epoxy group to the resulting dispersion, and
- Heat-treating the dispersion at a temperature of 70 to 150° C. for 0.5 to 12 hours.
Dependencies are inferred from the claim text.