33 results about "Enthalpy of fusion" patented technology

A method for packaging plastic material using a film to surround the material, and more particularly to a method for packaging hot melt adhesives, the resulting package formed thereby, and the film composition used therein. The method is preferably a coextrusion process for packaging a pressure sensitive hot melt adhesive by extruding a hot melt adhesive through a die orifice, and coextruding a wax-based polymeric film to surround the hot melt adhesive. The coated adhesive may then be formed into individual packaged units having a finite size and shape. The polymeric film comprises a composition having at least 25% by weight of a wax material, an enthalpy of fusion of at least about 100 J / g, and an elongation value at break of at least about 100%. Any type of hot melt adhesive formulation can be packaged or surrounded by the polymeric film in the process. Also, the specific enthalpy of fusion desired and / or elongation value at break desired for the polymeric film can be obtained by blending an appropriate amount of partially crystalline ethylene-based polymer together with a thermoplastic elastomeric block copolymer and / or an ethylene based or propylene-based elastomer.

Care and / or make-up cosmetic composition comprising: a liquid continuous fatty Phase structured with at least one structuring polymer (homopolymer or copolymer) having a weight-average molecular mass ranging from 500 to 500 000, containing at least one moiety comprising: at least one polyorganosiloxane group consisting of 1 to 1 000 organosiloxane units in the chain of the moiety or in the form of a graft, and at least two groups capable of establishing hydrogen interactions, Chosen from ester, amide, sulphonamide, carbamate, thiocarbamate, urea, urethane, thiourea, oxamido, guanidino and biguanidino groups, and combinations thereof, the polymer being solid at room temperature and soluble in the liquid fatty Phase at a temperature of 25 to 250° C., the Said liquid fatty Phase comprising at least one compound capable of reducing the enthalpy of fusion of the structuring polymer, and then the liquid fatty Phase, the structuring polymer and the compound capable of reducing the enthalpy of fusion of the structuring polymer forming a physiologically acceptable medium.

The hydrogenated vinyl-polybutadienes according to the present invention have degrees of hydrogenation of from 20 to 100%, Mooney viscosities in the range of from 10 to 150 Mooney units (ML 1+4 / 100° C.), glass transition temperatures (Tg) of ≦−57° C. and enthalpies of fusion (ΔH) of ≦30 J / g and having a microstructure witha) from 0 to 44 wt. % 1,2-vinyl-butadiene units of the formulab) from 20 to 64 wt. % 1,2-butylene units of the formulac) from 0 to 60 wt. % 1,4-butenylene units of the formulaCH2—CH═CH—CH2andd) from 0 to 60 wt. % 1,4-butylene units of the formulaCH2—CH2—CH2—CH2are outstandingly suitable for the production of rubber molded bodies of any kind, especially for the production of industrial rubber articles and of tires and tire components. The rubber molded bodies produced from the hydrogenated vinyl-polybutadienes according to the present invention have good resistance to ageing and good elasticity at low temperatures.

A film which comprises a layer composed of a moulding composition composed of a semicrystalline polyamide whose enthalpy of fusion is at least 8 J / g is used for production of a composite part with a substrate composed of a moulding composition composed of a substantially amorphous polyamide whose enthalpy of fusion is less than 8 J / g.

Polyamide blend molding compound, includes a polyamide blend content and at least one impact-resistant component, characterized in that the polyamide blend content includes the following polyamides: (A) 20 to 65% by weight of at least one semi-crystalline polyamide with an enthalpy of fusion >40 J / g and with an average of at least 8 C atoms per monomeric unit; (B) 8 to 25% by weight of at least one amorphous and / or microcrystalline polyamide, with the microcrystalline polyamide having an enthalpy of fusion in the range of 4 to 40 J / g, and (C) 1 to 20% by weight of at least one polyamide with an average of a maximum of 6 C atoms per monomeric unit. The impact-resistant component includes as follows: (D) 10 to 40% by weight of a polyamide elastomer which is composed of hard segments and soft segments, with the hard segments being based on lactams and / or amino-carboxylic acids, and (E) 0 to 35% by weight of a non-polyamide elastomer.

A hot melt adhesive for use on porous substrates, wherein the hot melt adhesive hasabout 10% to about 70% by weight of a polypropylene homopolymer having a DSC melting point of less than 100° C.;about 10% to about 60% of a first tackifying resin having a Ring & Ball Softening Point ofabout 95° C. to about 140° C.;about 0% to about 65% of a second tackifying resin that is different than the first tackifying resin;about 5% to about 50% of a plasticizer;about 1% to about 40% by weight of a secondary polymer which is either a semi crystalline polymer or wax with an enthalpy of fusion of greater than 30 Joules / gram;about 0.1% to about 5% of a stabilizer or antioxidant; wherein the components total 100% by weight of the composition, and the viscosity of the composition is equal to or less than about 20,000 centipoise (cP) at 163° C. (325° F.).

The present invention relates to a polymer composition for production of shaped objects via selective laser sintering wherein the polymer composition comprises a thermoplastic material having: a crystallisation half time of >= 30 s and <= 12 min at a supercooling of 50 DEG C below the peak melt temperature, wherein the crystallisation half time t1 / 2,c as determined via differential scanning calorimetry in accordance with ISO 11357-1 (2009); a glass transition temperature Tg of >= 50 DEG C as determined in accordance with ISO 11357-2 (2013); a peak melt temperature Tp,m of >= 200 DEG C as determined in accordance with ISO 11357-3 (2011), first heating run; an extrapolated first heating run melt onset temperature Tei,m of >= 5 DEG C above the extrapolated first cooling run crystallisation end temperature Tef,c as determined in accordance with ISO 11357-1 (2009), first heating and cooling run; and a degree of crystallinity of >= 10.0 % as determined according to the formula (I), wherein:D = degree of crystallinity of the thermoplastic material (%); deltaHf = enthalpy of fusion of the thermoplastic material as determined in accordance with ISO 11357-3 (2011); deltaHf,100 = enthalpy offusion of the thermoplastic material in a 100% crystalline state. Such polymer composition has a continuous use temperature of >= 100 DEG C, and a low change of molecular weight during exposure to selective laser sintering processing temperatures.

The present invention relates to a polylactic acid resin composition which has a low glass transition temperature, fusion temperature, and enthalpy of fusion, can be crystallized under commercially meaningful processing conditions, has good film processability such as extrusion properties, has excellent storage stability, and is highly biodegradable. The polylactic acid resin composition comprises a block copolymer comprising a hard segment and a soft segment, the hard segment comprising polylactic acid repeat units, and the soft segment comprising polyurethane polyol repeat units which have polyether-based polyol repeat units linearly connected via a urethane bond, wherein the soft segment is contained by 5% to 35% by weight based on the weight of the block copolymer, and the polylactic acid repeat units include poly(L-lactic acid) repeat units and poly(D-lactic acid) repeat units by a molar ratio of 94:6 to 88:12.

A resin composition contains a polymer whose enthalpy of fusion (ΔH) observed within a temperature range of 10° C. or higher and lower than 60° C. in differential scanning calorimetry is 30 J / g or more; and a low-molecular-weight compound whose enthalpy of fusion (ΔH) observed within a temperature range of 0° C. or higher and lower than 100° C. in differential scanning calorimetry is 30 J / g or more and whose molecular weight is 2000 or lower. A content of the low-molecular-weight compound is 3 parts by weight to 1000 parts by weight with respect to 100 parts by weight of the total amount of polymer components contained in the resin composition except the low-molecular-weight compound.

A resin composition contains a polymer whose enthalpy of fusion (ΔH) observed within a temperature range of 10° C. or higher and lower than 60° C. in differential scanning calorimetry is 30 J / g or more; and a low-molecular-weight compound whose enthalpy of fusion (ΔH) observed within a temperature range of 0° C. or higher and lower than 100° C. in differential scanning calorimetry is 30 J / g or more and whose molecular weight is 2000 or lower. A content of the low-molecular-weight compound is 3 parts by weight to 1000 parts by weight with respect to 100 parts by weight of the total amount of polymer components contained in the resin composition except the low-molecular-weight compound.

The present invention relates to a polymer composition for the production of shaped objects via selective laser sintering, wherein the polymer composition comprises a thermoplastic material having: -≥30s and ≤12min below the peak melting temperature The semi-crystallization time when supercooled at 50°C, wherein the semi-crystallization time t 1 / 2,c Glass transition temperature T measured by differential scanning calorimetry according to ISO 11357‑1 (2009); -≥50°C g , determined according to ISO 11357‑2(2013); -≥200℃ peak melting temperature T p,m , according to ISO 11357‑3 (2011), measured in the first heating run; - at the extrapolated first cooling run crystallization end temperature T ef,c Above the extrapolated first heating run melting onset temperature T ≥ 5°C ei,m , determined according to ISO 11357-1 (2009), first heating and cooling operation; and- a degree of crystallinity ≥ 10.0% determined according to formula (I), where - D = crystallinity (%) of the thermoplastic material ;‑ΔH f = enthalpy of fusion of the thermoplastic material, determined according to ISO 11357-3 (2011); -ΔH f,100 = enthalpy of fusion of the thermoplastic material in the 100% crystalline state. Such polymer compositions have continuous use temperatures > 100°C and low molecular weight changes during exposure to selective laser sintering processing temperatures.

The present invention relates to a polypropylene-based composite material comprising: (A) polypropylene; and (B) an olefin-based polymer satisfying the requirements of: (1) a melt index (MI, 190 DEG C and 2.16 kg load conditions) of 0.1-10.0 g / 10 min; (2) a melting temperature of 20-70 DEG C as measured by differential scanning calorimetry (DSC); and (3) high-temperature melting peaks being confirmed at 75-150 DEG C, as measured by a differential scanning calorimetry precision measurement method (SSA), in which the sum of melting enthalpies, DeltaH (75), in the corresponding region is 1.0 J / g or more. The polypropylene-based composite material of the present invention can exhibit excellent impact strength.

Provided is a resin composition from which a heat dissipation sheet having high effect to suppress temperature elevation due to heat generated by electronic parts (elements) can be obtained. Specifically provided is a resin composition containing: a polymer (1) whose enthalpy of fusion observed within a temperature range of 10° C. or higher and lower than 60° C. in differential scanning calorimetry is 30 J / g or more; and a thermally conductive material (3) whose thermal conductivity is 1 W / (m·K) or higher, wherein the content of the thermally conductive material (3) is 1 part by weight or more and 80 parts by weight or less, with respect to 100 parts by weight of the total amount of polymer components contained in the resin composition.