Disclosed is a polyamide-ionomer composition suitable for use in a backsheet in a photovoltaic module comprising a polymer component a polyamide and an anhydride ionomer comprising a copolymer of ethylene, an alpha, beta-unsaturated C.sub.3-C.sub.8 carboxylic acid and an ethylenically unsaturated dicarboxylic acid or derivative thereof selected from the group consisting of maleic acid, fumaric acid, itaconic acid, maleic anhydride, and a C.sub.1-C.sub.1 alkyl half ester of maleic acid, wherein the carboxylic acid functionalities present are at least partially neutralized to carboxylate salts of one or more alkali metal, transition metal, or alkaline earth metal cations; 0 to 20 weight % of pigment; and 0 to 40 weight % of filler; preferably wherein the combination of pigment and filler comprises 10 to 50 weight % of the composition; and 0 to 5 weight % of weatherability additives.

The present invention pertains to a curable composition comprising (a) at least one ethylene polymer, (b) less than 2 parts by weight of at least one monoperoxycarbonate for 100 parts by weight of constituent (a), (c) from 0.4 to less than 4 part by weight of at least one t-alkyl hydroperoxide for 100 parts by weight of constituent (b). It is also directed to a method for preventing scorching of a curable composition comprising an ethylene polymer, by adding a specific amount of t-alkyl hydroperoxide thereto and to a method for manufacturing a scorch-protected material.

A polyester sheet including a polyester (A), a 4-methyl-1-pentene polymer (B) having a specific heat of fusion and a meso diad fraction (m) of 98.5 to 100%, and a compatibilizing agent (C), wherein content proportions of the (A), (B), and (C) are 60 to 98.9 parts by mass for (A), 1 to 25 parts by mass for (B), and 0.1 to 15 parts by mass for (C), when a total content of (A), (B), and (C) is set as 100 parts by mass, and wherein (B) satisfies the requirements (a) to (d) described herein.

A thermally conductive sheet in which an adhesive thermally conductive layer and a non-adhesive resin layer are stacked. The adhesive thermally conductive layer includes an acrylic resin formed by curing an acrylic compound and a thermally conductive filler, a glass transition temperature of the acrylic resin is from 80 to 15 C., a tack property of the adhesive thermally conductive layer is higher than a tack property of the non-adhesive resin layer, the tack property of the non-adhesive resin layer is from 6 to 30 kN/m2. The non-adhesive resin layer has a glass transition temperature from 60 to 110 C. The tack property is measured by pressing probe on a layer and peeling the probe under conditions of pressing speed of 30 mm/min, peeling speed of 120 mm/min, load of 196 g, pressing time of 5.0 sec, pulling distance of 5 mm, probe heating of 40 C. and sheet stage heating of 40 C.

Disclosed is a high-performance repair tape for a backboard of a photovoltaic module. The tape comprises a base material layer, a functional adhesive layer, and a release material layer provided in sequence from top to bottom; the base material layer is formed of a polyester thin film material; the functional adhesive layer is formed of a high weather-resistance adhesive. According to the high-performance repair tape for a backboard of a photovoltaic module, and a manufacturing method therefor provided by the present invention, by selecting a weather-resistant base material layer, effects, such as water resisting, insulation, and ultraviolet radiation resistance, can be achieved, and a backboard independence effect is achieved; by selecting a weather-resistant adhesive for the functional adhesive layer, the weather resistance, high temperature resistance, and yellowing resistance of the tape can be improved; the tape has a strong bonding strength and is not easy to peel off, and the tape is easy to fit and facilitates construction.

A novel AB-type copolymer for use in organic photovoltaics. The AB-type copolymer comprises

a unit A, where the unit A is

##STR00001##

where R.sub.1 is a carbon chain from about 1 to about 30 units and where Y is selected from CN, F and Cl. The B unit of the AB-type copolymer is selected from is selected from:

##STR00002##

wherein
X.sub.1, X.sub.2, X.sub.3, and X.sub.4 are independently selected from the group consisting of: H, Cl, F, CN, alkyl, alkylthiol, alkoxy, ester, ketone, amide and aryl groups.

A novel AB-type copolymer for use in organic photovoltaics. The AB-type copolymer comprises

a unit A, where the unit A is

##STR00001##

where R.sub.1 is a carbon chain from about 1 to about 30 units and where Y is selected from CN, F and Cl. The B unit of the AB-type copolymer is selected from is selected from:

##STR00002## ##STR00003##

wherein
X.sub.1, X.sub.2, X.sub.3, and X.sub.4 are independently selected from the group consisting of: H, Cl, F, CN, alkyl, alkylthiol, alkoxy, ester, ketone, amide and aryl groups.

The invention discloses an aging resistant backside silver paste used for the crystalline silicon solar cells and a preparation method thereof. The paste comprises 40-50 parts by weight of silver powder, 1-10 parts by weight of nanosized copper powder, 2-10 parts by weight of lead-free glass powder, 35-55 parts by weight of organic binder, 1-5 parts by weight of other additives. The preparation method comprises the following steps: preparation of an organic binder; preparation of lead-free glass powder and preparation of an aging resistant backside silver paste. Application of the aging resistant backside silver paste used for crystalline silicon solar cells prepared in the invention may results in a dense electrode conductive layer, excellent welding properties and a distinct advantage in aging resistance.

The present invention relates to a composition for an encapsulant film including an ethylene/alpha-olefin copolymer having high volume resistance and light transmittance, and an encapsulant film using the same.

This disclosure relates to a polyimide polymer that includes the reaction product of: (a) at least one diamine selected from the group consisting of a diamine of Structure (Ia) and a diamine of Structure (Ib), ##STR00001##
(b) at least one diamine of Structure (II), ##STR00002##
(c) at least one tetracarboxylic acid dianhydride, and optionally (d) at least one compound containing a first functional group reactive with an amine or an anhydride and at least a second functional group selected from the group consisting of a substituted or unsubstituted alkenyl group and a substituted or unsubstituted alkynyl group. Each variable in the above formulas is defined in the specification.