The present invention provides a tin-free, room temperature curable silicone elastomer composition, wherein the uncured composition is a putty.

The present invention provides a tin-free, room temperature curable silicone elastomer composition, wherein the uncured composition is a putty.

The invention relates to a curable composition comprising: a) at least one polymer having at least one silicon-containing group of formula Si(R.sup.1).sub.k(Y).sub.3-k as defined herein; b) at least one titanium complex of formula TiL(OR.sup.3).sub.2 wherein each R.sup.3 is independently selected from a C.sub.1-20 alkyl or aryl which may optionally contain one or more heteroatoms, preferably selected from silicon, sulfur, nitrogen or oxygen atoms, wherein preferably R.sup.3 is selected from n-butyl or isopropyl, and L is a deprotonated, tridentate ligand, and c) optionally at least one compound which has a hydrolyzable silicon-containing group and a weight average molecular weight in the range of 100 to 1000 g/mol, preparations containing these compositions and use thereof.

The invention relates to a curable composition comprising: a) at least one polymer having at least one silicon-containing group of formula Si(R.sup.1).sub.k(Y).sub.3-k as defined herein; b) at least one titanium complex of formula TiL(OR.sup.3).sub.2 wherein each R.sup.3 is independently selected from a C.sub.1-20 alkyl or aryl which may optionally contain one or more heteroatoms, preferably selected from silicon, sulfur, nitrogen or oxygen atoms, wherein preferably R.sup.3 is selected from n-butyl or isopropyl, and L is a deprotonated, tridentate ligand, and c) optionally at least one compound which has a hydrolyzable silicon-containing group and a weight average molecular weight in the range of 100 to 1000 g/mol, preparations containing these compositions and use thereof.

The present invention is directed to a pneumatic tire comprising a tread, the tread comprising a rubber composition comprising from 30 to 80 phr of a styrene-butadiene rubber having a Tg ranging from 70 C to 40 C, from 10 to 50 phr of a high vinyl polybutadiene having a Tg ranging from 40 C to 5 C and has an isomeric vinyl 1,2 content in a range of from 50 to 90 percent by weight, and from 10 to 30 phr of a natural rubber or synthetic polyisoprene, silica, a blocked mercaptosilane, a traction resin, and liquid plasticizer selected from the group consisting of a low molecular weight polybutadiene functionalized with a hydroxyl functional group and sunflower oil.

The present invention is directed to a pneumatic tire comprising a tread, the tread comprising a rubber composition comprising from 30 to 80 phr of a styrene-butadiene rubber having a Tg ranging from 70 C to 40 C, from 10 to 50 phr of a high vinyl polybutadiene having a Tg ranging from 40 C to 5 C and has an isomeric vinyl 1,2 content in a range of from 50 to 90 percent by weight, and from 10 to 30 phr of a natural rubber or synthetic polyisoprene, silica, a blocked mercaptosilane, a traction resin, and liquid plasticizer selected from the group consisting of a low molecular weight polybutadiene functionalized with a hydroxyl functional group and sunflower oil.

The present disclosure provides a method for crosslinking polyolefins through using a substantially-miscible, polyolefin-based, silane-crosslinking-agent carrier and related moisture-crosslinkable polyolefin-based compositions. The method is for crosslinking a first polyolefin includes the steps of: (A) selecting a second polyolefin being substantially-miscible with the first polyolefin and having particles of a morphology selected from the group consisting of powder and substantially spherical; (B) admixing the second polyolefin to the first polyolefin; (C) adsorbing a silane-crosslinking agent onto the second polyolefin, thereby rendering a substantially-miscible, polyolefin-based, silane-crosslinking-agent carrier; (D) melt blending the first polyolefin and the substantially-miscible, polyolefin-based, silane-crosslinking-agent carrier, thereby yielding a moisture-crosslinkable polyolefin-based composition; and (E) crosslinking the moisture-crosslinkable polyolefin-based composition.

The present disclosure provides a method for crosslinking polyolefins through using a substantially-miscible, polyolefin-based, silane-crosslinking-agent carrier and related moisture-crosslinkable polyolefin-based compositions. The method is for crosslinking a first polyolefin includes the steps of: (A) selecting a second polyolefin being substantially-miscible with the first polyolefin and having particles of a morphology selected from the group consisting of powder and substantially spherical; (B) admixing the second polyolefin to the first polyolefin; (C) adsorbing a silane-crosslinking agent onto the second polyolefin, thereby rendering a substantially-miscible, polyolefin-based, silane-crosslinking-agent carrier; (D) melt blending the first polyolefin and the substantially-miscible, polyolefin-based, silane-crosslinking-agent carrier, thereby yielding a moisture-crosslinkable polyolefin-based composition; and (E) crosslinking the moisture-crosslinkable polyolefin-based composition.

A polyimide composition for a package structure is provided. The polyimide composition includes a polyimide precursor, a cross-linker, a photosensitizer, a first additive, a second additive and a solvent. The first additive comprises a polyether based compound, and the second additive comprises a siloxane based compound. The polyimide composition has more than 98% cyclization of the polyimide precursor when the polyimide composition is cured at a temperature range of 160 C. to 200 C.

The present disclosure relates to a photocurable polymer composition for 3D printing including: a UV-curable polyurethane oligomer; a photoinitiator; an oligomer; and a stabilizer. The photocurable polymer composition for 3D printing can produce a 3D printed product having excellent physical properties such as thermal properties, strength, elastic modulus and tensile elongation. In addition, the photocurable polymer composition can produce a 3D printed product which, even when the original shape thereof is deformed during use, can be restored to the original shape thereof.