Heat-curable polymer paste
AssigneeE. I. Du Pont de Nemours and Company
InventorsTakuya Konno, Naoto Nakajima
Life of this patent
Estimating the term…
Abstract
A heat-curable polymer paste comprising: (i) 100 parts by weight of a transparent polyester resin having a hydroxyl value of 1 to 10 mgKOH/g and a glass transition point (Tg) of 40 to 120° C., (ii) 1 to 30 parts by weight of a crosslinking agent comprising methoxymethyl imino melamine represented as formula (I); (C2N3)[—N(H)(CH2OCH3)]n[—N(CH2OCH3)2]3-n (I) wherein n is 1 to 3, and (iii) 50 to 200 parts by weight of an organic solvent.
Claims11
An article comprising a substrate, an electrode formed on the substrate, a LED chip placed on the electrode, and a sealant covering the LED chip, wherein the sealant is made from a heat-curable polymer paste comprising:
- (i) 100 parts by weight of a polyester resin having a hydroxyl value of 1 to 10 mgKOH/g and a glass transition point (Tg) of 40 to 120° C.;
- (ii) 1 to 30 parts by weight of a crosslinking agent comprising methoxymethyl imino melamine selected from the group consisting of the following (a), (b), (c) and mixture therefore:
- and
- (iii) 50 to 200 parts by weight an organic solvent,
- wherein the heat-curable polymer paste has been heated to form the sealant and wherein the article is a LED device.
An article comprising a substrate, a light reflector formed on the substrate, an electrode formed on the light reflector, a LED chip placed on the electrode, and a sealant covering the LED chip, wherein the light reflector is made from the heat-curable polymer paste comprising:
- (i) 100 parts by weight of a polyester resin having a hydroxyl value of 1 to 10 mgKOH/g and a glass transition point (Tg) of 40 to 120° C.;
- (ii) 1 to 30 parts by weight of a crosslinking agent comprising methoxymethyl imino melamine selected from the group consisting of the following (a), (b), (c) and mixtures thereof:
- and
- (iii) 50 to 200 parts by weight of an organic solvent;
- and
- (iv) 10 to 65 vol. %, based on the volume of the heat-curable polymer paste, of a white pigment selected from the group consisting of titanium oxide (TiO2), silicon oxide (SiO2), aluminum oxide (Al2O3), zirconium oxide (ZrO2), magnesium oxide (MgO), zinc oxide (ZnO), barium sulfate (BaSO4) and mixtures thereof;
- wherein the heat-curable polymer paste has been heated to form the light reflector and wherein the article is a LED device.
A method of manufacturing a LED device comprising the steps of:
- providing a substrate;
- forming an electrode on the substrate;
- placing a LED chip on the electrode;
- applying a heat-curable polymer paste to cover the LED chip;
- and
- heating the applied heat-curable polymer paste to form a sealant;
- wherein the heat-curable polymer paste comprises:
- (i) 100 parts by weight of a polyester resin having hydroxyl value of 1 to 10 mgKOH/g and glass transition point (Tg) of 40 to 120° C.,
- (ii) 1 to 30 parts by weight of a crosslinking agent comprising methoxymethyl imino melamine selected from the group consisting of the following (a), (b), (c) and a mixture thereof
- and
- (iii) 50 to 200 parts by weight an organic solvent.
A method of manufacturing a LED device comprising steps of:
- preparing a substrate;
- applying a heat-curable polymer paste on the substrate;
- heating the applied heat-curable polymer paste to form a light reflector;
- forming an electrode on the light reflector;
- placing a LED chip on the electrode;
- forming a sealant to cover the LED chip;
- and
- wherein the heat-curable polymer paste comprises:
- (i) 100 parts by weight of a polyester resin having hydroxyl value of 1 to 10 mgKOH/g and glass transition point (Tg) of 40 to 120° C.,
- (ii) 1 to 30 parts by weight of a crosslinking agent comprising methoxymethyl imino melamine selected from the group consisting of the following (a), (b), (c) and a mixture thereof
- and
- (iii) 50 to 200 parts by weight of an organic solvent;
- and
- (iv) 10 to 65 vol. %, based on the volume of the heat-curable polymer paste, of a white pigment selected from the group consisting of titanium oxide (TiO2), silicon oxide (SiO2), aluminum oxide (Al2O3), zirconium oxide (ZrO2), magnesium oxide (MgO), zinc oxide (ZnO), barium sulfate (BaSO4) and mixtures thereof.
Dependencies are inferred from the claim text.