1495 results about "Dicyclopentadiene" patented technology

Compositions including fibers, fillers, reinforcing agents or other property-enhancing agents added to a polymeric matrix formed from DCPD monomer or related compounds such as norbornene and norbornadiene are disclosed. The composition has a mechanically forgiving matrix due to the polymer with the inherent strength and other physical properties of the enhancement agent according to the invention. Enhancement agents according to the invention generally include inorganic, organic and metallic substances in a variety of forms.

Methods for preparing formaldehyde-free resorcinol resins are disclosed. The methods generally comprise reacting resorcinol first with dicyclopentadiene and then reacting that mixture with an olefinic compound. The resins produced by this method are also disclosed, as are rubber compositions utilizing the present resins. The resins are characterized as having a free resorcinol content of about 1 wt. % or less, and yielding a suitable softening point when used in rubber applications.

The invention is a polymerization process for ethylene copolymers having a density less than 0.915 comprising contacting ethylene, one or more alpha-olefin monomer, and optionally one or more diene monomer, with a catalyst composition comprising the reaction product of at least one organometallic Group 4 metallocene compound derived from a bridged, fused-ring ligand containing biscyclopentadienyl hafnocene, said bridge being a substituted or unsubstituted carbon or silicon atom connecting the biscyclopentadienyl ligands, and a salt of a Group 13 element anionic complex having halogenated aromatic ligands in an essentially tetrahedral structure wherein the aromatic groups are polycyclic fused or pendant aromatic rings. The process is particularly suitable for the preparation of high comonomer content and high molecular weight ethylene-alpha-olefin plastomers and ethylene-propylene or ethylene-propylene-diene monomer elastomers.

The present invention relates to a composite water-proof material. It is made up by using (by weight portion) 20-70 portions of plant fibre, 10-60 portions of flyash and 5-40 portions of adhesive through the processes of mixing them, die-pressing and polymerization. The described adhesive is formed from maleic anhydride, phthalic anhydride, polyalcohol, styrene or mixture of their homologous compounds, also can include trimeric cyanamide, acrylic acid or rosin and dicyclopentadiene. Its raw material composition also can include 10-40 portions of new and old plastics. Said plate material has strong strength and good water-proof property, so that it has extensive application range.

The present invention relates to a novel method of using industrial dicyclopentadiene of purity of 75 percent to 85 percent to prepare modified unsaturated polyester resin. In the preparation of the resin, the industrial dicyclopentadiene separated from the saturated or unsaturated dicarbonic acid or acidic anhydride and the distilled part of mixed C5 is used as the raw material. After hydrolysis and addition reaction, the diol or polyol of appropriate amount is added. The polymerization and dehydration reaction is done with the influence of acidic catalyst. When the mixture is condensed to the designated acid value, the inhibitor and cross-linking monomer of appropriate amount are added and then stirred to prepare the product. The present invention has the advantage that the cost of resin is lower than the common type unsaturated resin. At the same time, the air-drying performance, heat resistance, volumetric shrinkage rate and other performances are all superior to the common type unsaturated polyester resin. The product can be widely used in the fields of glass steel, mold, plastic clothing, sealing, and adhesive and so on.

A thermally-conductive interface interposable intermediate a first heat transfer surface and an opposing second heat transfer surface to provide a thermal pathway therebetween. The interface includes a thermally-conductive compound formed into a layer which is conformable between the first and second heat transfer surface. The compound is an admixture of: (a) a liquid resin constituent; and (b) a particulate filler constituent. The liquid resin constituent may be an ethylene-propylene copolymer (EPM) or a terpolymer (EPDM) of ethylene and propylene and a diene which may be ethylidene norbornene (ENB) or dicyclopentadiene (DCPD).

The invention relates to a method for synthesizing unsaturated phenolic resin with various etherification waste, which includes the four steps: (1) etherification waste and polyhydric alcohol have alcohol sis and ester interchange with catalyst existing; (2)alcohol zed product and unsaturated binary acid or have etherification polycondensation; (3) use dicyclopentadiene (DCPD) to blocking modify in the later period of etherification polycondensation; (4) add into styrene solution for cross linking. The invention has plentiful sources of raw material, low price, decreased pollution and productive cost and energy saving, as well as eliminates the disadvantage of bad dissolubility in styrene .

The invention relates to dicyclopentadiene hydrogenation special catalyst and the preparation method thereof; a catalyst active component is abstracted from Pd or Pt, the percentage content of the weight can be Pd 0.3 to 1.3 percent or Pt 0.5 to 1.2 percent, carriers can be porous inorganic materials of aluminum oxide, silicon oxide, molecular sieves, kaolin, etc. By adopting the novel noble metal colloid method process, the prepared catalyst has the advantages that the grain size of active component particles is concentrated, the dispersion degree is high, the surface area is large, etc., thus the catalyst activity is higher, and the operating pressure of a hydrogenation device can be notably reduced. The preparation method provided by the invention effectively reduces the quantity of noble metals, the catalyst is used for the dicyclopentadiene petroleum resin hydrogenation device with poor color phase in the carbon five fraction, the content of unsaturated hydrocarbon key can be obviously reduced, and the color phase of the resin is improved to be of a water white color.

The invention relates to a preparation method of microcapsules for rubber material self-healing, belonging to the field of self-repair microcapsules. By adopting an in-situ polymerization method, the wall material urea-formaldehyde resin is coated on the surface of the repair agent core material dicyclopentadiene liquid drop to form microcapsules. An impregnation film spreading method is utilized to compound the microcapsules with natural latex, so that the microcapsules can break and release the repair agent to fill up the cracks and heal the wounds when the rubber substrate is damaged. The invention provides a new technical way for prolonging the service life of the rubber material.

Disclosed is a resin composition for a PCB, the composition including: (a) a polyphenylene ether resin modified via a redistribution reaction of polyphenylene ether in the presence of 9,9-bis(hydroxyaryl)fluorene or 9,10-dihydro-9-oxa-10-(dihydroxyaryl)-10-phosphaphenanthrene 10-oxide; (b) a dicyclopentadiene epoxy resin represented by Formula 1; and (c) an alkylphenol aldehyde novolak curing agent represented by Formula 2, wherein, when the polyphenylene ether resin is modified via a redistribution reaction of the polyphenylene ether in the presence of 9,9-bis(hydroxyaryl)fluorene, the composition further includes (d) a brominated epoxy resin. Also, a composite substrate and a copper laminate using the same are disclosed.

The invention provides an application of organosilane, a polyolefin in-kettle alloy and a preparation method thereof. The preparation method for the polyolefin in-kettle alloy comprises the following steps: enabling a first olefin monomer to carry out first polymerization reaction in the presence of a catalyst; introducing a second olefin monomer into a polymerization reaction system to carry out second polymerization reaction, wherein the first olefin monomer is different from the second olefin monomer; first polymerization reaction and/or second polymerization reaction is carried out in the presence of organosilane with a general formula of R1mSiXn(OR2)k; R1 is C2-C20 alkyl and a R1 terminal comprises alpha-olefin double bonds, a norborneol alkenyl group, a cycloolefin group or a dicyclopentadiene group; X is halogen; R2 is a C1-C20 linear chain, a branched chain or isomerized alkyl; m is an integer number from 1 to 3; n is an integer number from 1 to 3; k is an integer number from 0 to 2; and m+n+k is equal to 4. Cross-linking degree of a rubber phase in the polyolefin in-kettle alloy obtained from the preparation method is relatively high, and the polyolefin in-kettle alloy has relatively high toughness and relatively low tensile breaking strength.

The invention relates to a toughened epoxy resin composition containing a dicyclopentadiene ester ring structure and a preparation method thereof. The composition comprises 100 parts of epoxy resin, 25 to 50 parts of acid anhydride curing agent, 10 to 25 parts of dicyclopentadiene, and 0.5 to 5 parts of accelerants. By introducing the dicyclopentadiene ester ring structure, the toughness of the epoxy resin is improved. Meanwhile, because of the dicyclopentadiene ester ring structure, the cured epoxy resin has low water absorption, good air dried property and waterproof and moisture-proof performance.

The invention discloses a method for the one-section extraction separation and cracking of C5 distillate. The method comprises the following steps: cracking C5 raw materials to separate light components such as C4 and acetylene hydrocarbons in a lightness removing tower; making the raw materials in a lightness removing tower kettle to react in a dipolymer reactor so as to make cyclopentadiene be dimerized into dicyclopentadiene; removing heavy components of reaction products in a weight removing tower so as to obtain material stream containing isoprene at the tower top; carrying out extraction and rectification in an extraction and rectification tower, and collecting the reaction products at a tower kettle and sending the reaction products into a stripping tower; separating isoprene with solvent in the stripping tower, collecting the isoprene at the tower top and sending the isoprene into the dipolymer reactor, and making cyclopentadiene be dimerized into dicyclopentadiene; and finally introducing the reaction products into an isoprene treating tower for refinement so as to obtain a polymer grade isoprene product. The method has the advantages of short flow, low energy consumption, low construction and operating cost, high product quality, and the like.

Disclosed is an epoxy resin composition for printed circuit board, which includes (A) an epoxy resin comprising a dicyclopentadiene type epoxy resin; (B) a copolymer of styrene and maleic anhydride as a curing agent; (C) a curing accelerator; (D) an optional silane dispersing agent; (E) an optional phosphorous-containing flame retardant; (F) an optional toughening agent; and (G) an optional inorganic filler.

A hydrogenation catalyst for preparing dicyclopentadiene hydrogenant petroleum resin by dicyclopentadiene petroleum resin. The active components of the resin are Pd and Pt. The contents of Pd and Pt are 0.1í½ 1.0wtúÑ and 0.05í½0.5wtúÑ, respectively. The carrier of the catalyst is ª†-Al2O3, the specific surface are is 150í½250m2/g, the volume is 0.5í½0.9ml/g. Hydrogenant resin prepared from dicyclopentadiene petroleum resin through the catalyst has a lowered content of unsaturated hydrocarbon bonds, and the color of the resin is improved to water-white.

The present invention provides a technological process of producing high purity dicyclopentadiene (DCPD) with petroleum cracking C5 fraction as main material. The process includes the following steps: 1. dimerizing C5 fraction and eliminating light components to obtain coarse DCPD; 2. catalytically depolymerizing the coarse DCPD at 100-200 deg.c in the presence of inorganic carrier supported acid catalyst to obtain high purity CPD; and 3. dimerizing CPD and eliminating light components to obtain high purity DCPD. The present invention is a low temperature catalytic depolymerizing process with low scaling, and effectively raised depolymerizing reaction rate and depolymerizing reaction selectivity.

The invention discloses a preparation method for exo-dicyclopentadiene from bridge-type dicyclopentadiene or cyclopentadiene, belonging to the exo-dicyclopentadiene preparation technology. The method includes preparing a solution composed of bridge-type dicyclopentadiene or cyclopentadiene, and benzene, or toluene, or benzyl alcohol, or decalin, or cyclohexane, or heptane, or hexane at a certain quality ratio, adding p-tert-butylcatechol, or 2, 5-di-tert-butylhydroquinone, or 2,6-di-tertbutyl-4-methylphenol, or hydroquinone, or 2-methyl-1,4-dihydroxybenzene, or o-hydroquinone inhibitor and carrying out reaction at a certain temperature and pressure, distilling and separating to obtain the exo-dicyclopentadiene. The invention has the advantages of one-step synthesis without catalyst, mild reaction conditions and high yield, and is suitable for industrial production.