The invention relates to a resin composition comprising at least an organophosphorous compound and a branched amorphous carboxylic acid functional polyester, said polyester having a T.sub.g of at least 40 C., said polyester comprising at least 1 to 45% mol of 2,2-dimethyl-1,3-propanediol; a C.sub.3 to C.sub.5 aliphatic diol AD1 not including 2,2-dimethyl-1,3-propanediol; a C.sub.6 to C.sub.50 aliphatic or cycloaliphatic diol AD2; 0.1 to 10% mol of an at least trifunctional monomer; 1 to 55% mol of terephthalic acid, wherein the % mol is based on the polyester. The powder coatings of the present invention derived upon curing at low temperature of the thermosetting powder coating compositions of the invention that were storage stable and comprised said resin composition and a crosslinker having functional groups that are reactive with the carboxylic acid groups of the polyester, have limited or no blooming, good smoothness sufficient reverse impact resistance and preferably have also good degassing limit.

The invention relates to a resin composition comprising at least an organophosphorous compound and a branched amorphous carboxylic acid functional polyester, said polyester having a T.sub.g of at least 40 C., said polyester comprising at least 1 to 45% mol of 2,2-dimethyl-1,3-propanediol; a C.sub.3 to C.sub.5 aliphatic diol AD1 not including 2,2-dimethyl-1,3-propanediol; a C.sub.6 to C.sub.50 aliphatic or cycloaliphatic diol AD2; 0.1 to 10% mol of an at least trifunctional monomer; 1 to 55% mol of terephthalic acid, wherein the % mol is based on the polyester. The powder coatings of the present invention derived upon curing at low temperature of the thermosetting powder coating compositions of the invention that were storage stable and comprised said resin composition and a crosslinker having functional groups that are reactive with the carboxylic acid groups of the polyester, have limited or no blooming, good smoothness sufficient reverse impact resistance and preferably have also good degassing limit.

A wax composition that improves at least one of traction or a grip of sporting equipment comprises: 1-98 wt. % of a primary wax component, wherein the primary wax component is not derived from petroleum, is not synthetic, is not derived from a mineral, is not derived from an animal, and is not derived from an annual plant; 1-40 wt. % of a softening agent; and at least one of a) above 0-40 wt. % of a tackifier or b) above 0-70 wt. % of a filler.

A wax composition that improves at least one of traction or a grip of sporting equipment comprises: 1-98 wt. % of a primary wax component, wherein the primary wax component is not derived from petroleum, is not synthetic, is not derived from a mineral, is not derived from an animal, and is not derived from an annual plant; 1-40 wt. % of a softening agent; and at least one of a) above 0-40 wt. % of a tackifier or b) above 0-70 wt. % of a filler.

An apparatus to batch or continuously form solid polymer particles, the apparatus comprising the following components: A) at least one pastillation unit comprising a pastillation head, said unit used to form discrete molten polymer particles from a polymer melt; B) a moving belt to receive and transfer the discrete molten polymer particles from the pastillation head; C) a means to transfer water onto the moving belt, such that the water comes into contact with the discrete molten polymer particles on the moving belt to form the solid polymer particles; and wherein the water of component C is sprayed onto the discrete molten polymer particles, such that the ratio of the rate of water spray to the discharge rate is ?3.0; and wherein the belt residence time is ?50 seconds.

An apparatus to batch or continuously form solid polymer particles, the apparatus comprising the following components: A) at least one pastillation unit comprising a pastillation head, said unit used to form discrete molten polymer particles from a polymer melt; B) a moving belt to receive and transfer the discrete molten polymer particles from the pastillation head; C) a means to transfer water onto the moving belt, such that the water comes into contact with the discrete molten polymer particles on the moving belt to form the solid polymer particles; and wherein the water of component C is sprayed onto the discrete molten polymer particles, such that the ratio of the rate of water spray to the discharge rate is ?3.0; and wherein the belt residence time is ?50 seconds.

A recovery system for recovering plastic recycling material includes at least one rinsing chamber designed for heating and rinsing the plastic recycling material and having a rinsing air feed for feeding heated rinsing air into the at least one rinsing chamber; and at least one cooling chamber designed for cooling the plastic recycling material and having a cooling air feed for feeding cooling air into the at least one cooling chamber. The at least one cooling chamber is connected downstream of the at least one rinsing chamber and is fluid-connected to the rinsing air feed via an exhaust air line in such a manner that the exhaust air heated in the at least one cooling chamber by the plastic recycling material can be fed into the rinsing air feed of the at least one rinsing chamber. Use of such recovery system and method for recovering plastic recycling material.

Provided is a strand producing apparatus including: an extrusion-molding unit configured to melt and knead a resin composition and extrusion-mold the resin composition into a strand shape; and a cooling/solidifying unit configured to cool and solidify the extrusion-molded resin composition having the strand shape, wherein the cooling/solidifying unit is a roll unit that includes a groove having a curvature and internally includes a coolant flow path, and wherein both of a coolant inlet and a coolant outlet of the coolant flow path are provided at the same end side of the roll unit.

Provided is a strand producing apparatus including: an extrusion-molding unit configured to melt and knead a resin composition and extrusion-mold the resin composition into a strand shape; and a cooling/solidifying unit configured to cool and solidify the extrusion-molded resin composition having the strand shape, wherein the cooling/solidifying unit is a roll unit that includes a groove having a curvature and internally includes a coolant flow path, and wherein both of a coolant inlet and a coolant outlet of the coolant flow path are provided at the same end side of the roll unit.

A method for preparing a polyolefin resin powder has the steps of a) heat dissolving a polyolefin resin in an organic solvent having a solubility parameter less than or equal to the solubility parameter of the polyolefin resin to obtain a polyolefin resin solution; b) cooling the polyolefin resin solution to precipitate a solid, thereby obtaining a solid-liquid mixture; c) optionally adding an adjuvant to the solid-liquid mixture and mixing; and d) conducting solid-liquid separation and drying to obtain a polyolefin resin powder suitable for selective laser sintering.

The difference between the solubility parameters of the organic solvent and of the polyolefin resin is within 0-20% of the solubility parameter of the polyolefin resin. The polyolefin resin powder obtained according to this method has good antioxidant property, good powder flowability, moderate size, smooth surface, suitable bulk density, and suitable dispersibility and particle size distribution.