30results about How to "Good adhesive performance" patented technology

The present invention relates to an acrylic pressure-sensitive adhesive including: a) an acrylic polymer containing, as a monomer unit, an alkyl (meth)acrylate including an alkyl group having 1 to 20 carbon atoms in an amount of 50% by weight or more; and b) a tackifier resin, in which the acrylic polymer a) contains two kinds of monomer units having a difference in solubility parameter (SP value) of 0.2 (MPa)1 / 2 or more, each in an amount of 15% by weight or more.

The present invention relates to a method for selective hydrogenation through cracking of a C5-C9 distillate. According to the method, the catalyst comprises an alumina carrier having a macroporous structure and metal active components comprising nickel and tungsten and supported on the carrier, the nickel oxide content is 12-22 wt% based on the total weight of the catalyst, the tungsten oxide is 1.5-8 wt% based on the total weight of the catalyst, and the hydrogenation reaction process conditions are that the reaction inlet temperature is 40-55 DEG C, the reaction pressure is 2.0-3.5 MPa, the hydrogen oil volume ratio is 60-150, and the liquid volume space velocity is 3.0-5.5 h<-1>. According to the present invention, the catalyst has characteristics of good glue capacity, strong arsenic resistance, strong sulfur resistance, strong coking inhibition and low temperature activity; and the method provides strong adaptability for the cracking gasoline raw materials having different arsenic contents and different sulfur contents.

The present invention relates to a pressure-sensitive adhesive composition used for a pressure-sensitive adhesive sheet to be directly attached to a metal surface, the composition including, as a base polymer, an acrylic copolymer obtained by polymerizing a monomer mixture, the monomer mixture including: at least one monomer (monomer m1) selected from alkyl(meth)acrylates represented by the formula (I): CH2═C(R1)COOR2 in which R1 is a hydrogen atom or a methyl group, and R2 is an alkyl group having 1 to 20 carbon atoms, in an amount of 50 to 99.9% by weight based on a total amount of the monomer mixture, and at least one monomer (monomer m2) selected from N-hydroxyalkyl(meth)acrylamides represented by the formula (II): CH2═C(R3)CONHR4 in which R3 is a hydrogen atom or a methyl group, and R4 is a hydroxyalkyl group having 2 to 4 carbon atoms, in an amount of 0.1 to 25% by weight based on the total amount of the monomer mixture; and the monomer mixture including substantially no carboxyl group-containing monomer.

The present invention relates to a first-stage selective hydrogenation catalyst for cracking gasoline, wherein the catalyst comprises an alumina carrier having a macroporous structure and a metal active component palladium supported on the carrier, and the palladium content is 0.2-0.35 wt% based on the total weight of the catalyst. The catalyst of the present invention has advantages of good glue capacity, strong arsenic resistance, strong sulfur resistance, and strong coking inhibition.

A pressure-sensitive adhesive composition of the invention includes a (meth)acryl-based polymer obtained by polymerization of a monomer component including 25% by weight to 99.5% by weight of a cyclic structure-containing monomer and 0.5% by weight to 70% by weight of a branched structure-containing (meth)acryl-based monomer having a branched alkyl group of 3 to 18 carbon atoms at an ester end. The pressure-sensitive adhesive composition has a satisfactory level of adhesive performance and can form a pressure-sensitive adhesive layer with a lower dielectric constant.

The invention discloses a single-layer circuit board, a high-layer circuit board and a fabrication method of the high-layer circuit board. The single-layer circuit board comprises a core board and a copper frame, wherein the copper frame is arranged at an outer edge of the core board, the core board comprises a pattern region and a blank region, wherein the pattern region is arranged at a middle part, the blank region is arranged at the periphery of the pattern region, a plurality of bonding pads are uniformly arranged on the blank region of the upper surface and / or the lower surface of the core board, a distance is reserved between adjacent bonding pads, a plurality of adhesive guide grooves are uniformly arranged on the upper surface and / or the lower surface of the copper frame, and the central line of the plurality of adhesive guide grooves is intersected with a geometric center of the core board so that the plurality of adhesive guide grooves can be radially arranged around the geometric center of the core board. By the single-layer circuit board, the adhesive flowing performance during the lamination process can be effectively improved, resin adhesive flowing among layers is more complete and uniform, so that a copper foil is laminated to be corrugated by the high-layer circuit board.

The invention relates to a first-stage selective hydrogenation method for pyrolysis gasoline. The pyrolysis gasoline is C6-C8 fraction, a catalyst comprises an alumina supporter with a macroporous structure and metal active components including nickel and tungsten which are supported on the supporter, wherein the content of nickel oxide is 12wt%-22wt% of total weight of the catalyst, the content of tungsten oxide is 1.5wt%-8wt% of the total weight of the catalyst, and technological conditions of the hydrogenation reaction are shown as follows: the reaction inlet temperature is 60-100 DEG C, the reaction pressure is 2.0-3.5 MPa, a volume ratio of hydrogen to oil is 60-180, and volume space velocity of a liquid is 3.0-5.5 h<-1>. The catalyst is better in colloid tolerance capacity, is arsenic-resistant and sulfur-resistant, has high coking inhibition capacity and is well-adapted to pyrolysis gasoline raw materials with different arsenic content and different sulfur content.

The invention provides an electrophysiologic catheter with multilevel adjustable bends. The electrophysiologic catheter comprises a first-level adjustable bend section, a second-level adjustable bendsection, a handle, a first pull wire, a second pull wire and a plurality of guide wires, the first-level adjustable bend section comprises a first pipeline and a head electrode arranged at a far end of the first pipeline, two passageways are arranged in the first pipeline along the length direction of the same, the second-level adjustable bend section comprises a second pipeline, a far end of thesecond pipeline is connected with a near end of the first pipeline, three passageways are arranged in the second pipeline along the length direction of the same, two of the three passageways of the second pipeline are communicated with the two passageways of the first pipeline, and at least one ring electrode is arranged on an outer wall of each of the first pipeline and the second pipeline. The electrophysiologic catheter with multilevel adjustable bends is capable of adapting to all heart structures in one specification, so that operation is enabled to be more convenient.

The present invention includes compositions comprising an alkyne-based substrate, an azide-based substrate, optionally a Cu(II) salt and optionally a photoinducible reducing agent. The present invention further includes a method of preparing composite materials that are suitable for use as dental implants using the compositions of the invention.

The present invention is a block copolymer composition comprising an aromatic vinyl-isoprene-aromatic vinyl triblock copolymer (A) and an aromatic vinyl-isoprene diblock copolymer (B),(i) a ratio (MwDa / MwDb) of a weight average molecular weight MwDa of a polyisoprene block in the triblock copolymer (A) to a weight average molecular weight MwDb of a polyisoprene block in the diblock copolymer (B) being 0.5 or more to less than 1,(ii) a ratio of an aromatic vinyl monomer unit in all polymer components of the block copolymer composition being 10 to 30 mass %, and(iii) the block copolymer composition having a breaking strength of less than 8 MPa and an elongation at break of less than 1,100%; a pressure-sensitive adhesive composition comprising the block copolymer composition and a tackifying resin; and a pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer that comprises the pressure-sensitive adhesive composition.

Provided is a resin acid ester-based tackifier having a good compatibility with a synthetic rubber elastomer, being capable of reducing the melt viscosity of the elastomer, and being capable of imparting excellent adhesive properties and / or pressure-sensitive adhesive properties to the elastomer. The tackifier is composed of an ester composition characterized by(i) the ester composition comprising 70% by weight or more of a resin acid ester represented by the general formula (1):and(ii) the S′NMR / SNMR ratio of the ester composition being at least 6% in the 1H-NMR spectrum of the ester composition, wherein S′NMR is the total integral value of the proton signal(s) appearing in the region of 6 to 8 ppm and SNMR is the total integral value of all the proton signals appearing over the entire range of the 1H-NMR spectrum.

The invention relates to an environment-friendly novel water-based ink specially used for decorative paper and manufacturing technique thereof. The preparation method comprises: adding NaHCO3 or Na2CO3 into gelatin deionized water, fully stirring and raising the temperature to over 60 DEG C; taking methyl methacrylate, caprolactam or mixture of the methyl methacrylate and the caprolactam to be emulsified, then simultaneously dripping the emulsified solution and (NH4)2 S2 O8 or K2S2O8 into gelatin solution for reaction, and cooling, filtering and discharging; adding right amount of thickening agent, flatting agent, defoaming agent and alcohols solvent to form the water-based ink, and obtaining bonding material; and finally, evenly mixing the bonding material and color paste to form the water-based ink specially used for the decorative paper. The ink has high bonding strength, meets the requirements of printing the decorative paper and panel-type furniture processing technique of subsequent laminate flooring, and has excellent color contrast property.

Provided is an adhesive that effectively utilizes bark and demonstrates superior adhesion performance. The adhesive of the present invention comprises at least one adhesive resin (A) selected from the group consisting of phenolic resin, urea resin, and melamine resin, and finely pulverized bark (B) comprising cellulose nanofibers.

The invention discloses a catalyst for selective hydrogenation of pyrolysis gasoline. The catalyst comprises an alumina supporter with a pore-expanding structure, wherein the alumina supporter is supported with metal palladium and nickel oxide, the content of the metal palladium is 0.1-0.15% of total weight of the catalyst, and the content of the nickel oxide is 8-10% of the total weight of the catalyst. The surface of the obtained alumina supporter with the pore-expanding structure is modified by using calcium, and the surface of the supporter is further modified by combining with impregnation way, and part of micropores formed in the surface of the supporter can be effectively peptized, so that reduction of the proportion of micropores in the surface of the supporter is facilitated, thegeneration of more active site supporting centers on the surface of the supporter is promoted, the utilization rate of the active component nickel is effectively improved, and the selective hydrogenation activity of the pyrolysis gasoline is improved. In addition, the inner and outer components of the supporter are different in concentration, so that the phenomenon is avoided that alkyne and alkadiene easily enter pore channels cause polymerization reaction and the pore channels are blocked.

Provided is an adhesive that effectively utilizes bark and demonstrates superior adhesion performance. The adhesive of the present invention comprises at least one adhesive resin (A) selected from the group consisting of phenolic resin, urea resin, and melamine resin, and finely pulverized bark (B) comprising cellulose nanofibers.

The invention relates to a cigarette tipping machine, which comprises: a curler, used for curling tipping paper; a first scraper, arranged on the curler, for scraping the tipping paper; The conveying direction of the said gluing device is located at the downstream of the said curler; The paper is pre-shaved. The present invention scrapes the tipping paper through a scraping device before the tipping paper enters the crimper, and then shaves the tipping paper through the crimper, so that the tipping paper obtains excellent glue-absorbing properties, and effectively improves the impact on the cigarette tipping machine. The machine adaptability of different batches and types of tipping paper improves the stability of rubbing quality of tipping paper and reduces the quality problems of cigarettes caused by poor glue absorption of tipping paper.

The invention provides a straight-chain dialdehyde-modified polyvinyl alcohol. By using straight-chain dialdehyde for modification of polyvinyl alcohol, the prepared modified polyvinyl alcohol is usedas a main dispersing agent for suspension polymerization of vinyl chloride, especially has a good dispersion effect when being used as a main dispersing agent for suspension polymerization of vinyl chloride, can effectively inhibit foaming in the vinyl chloride polymerization process, and has good rubber retention performance and dispersion performance. A polyvinyl chloride product with excellentperformance and uniform particle size distribution and having viscosity number of 107-112ml / g, apparent density of 0.45-0.50g / ml and plasticizer absorption of 20% and above can be prepared. The preparation method is simple, has short process time, requires no large equipment, and is suitable for industrial production.

The invention discloses a planting method for landscaping nursery stocks. The method comprises the following steps that landscaping nursery stocks are transplanted into planting pits, and nursery stock slow-release fertilizer and soil are mixed to be uniform and then applied into the planting pits; after transplanting, topdressing is performed one time every three years, and according to the fertilization method, an annular ditch is dug along the extension of a crown, the nursery stock slow-release fertilizer and the soil are mixed to be uniform and then applied into the annular ditch, and then earthing and water irrigation are performed. The nursery stock slow-release fertilizer is prepared from, by weight, 34-45 parts of ammonium chloride, 12-20 parts of ammonium dihydrogen phosphate, 20-40 parts of plant ash, 40-50 parts of paper mill sludge, 1.5-3 parts of colliery powder, 1.5-2.4 parts of sepiolite powder, 0.1-0.2 part of ferriammonium phosphate, 0.1-0.2 part of zinc humate, 2-8 parts of magnesium humane, 0.1-0.2 part of kieselguhr, 2-4 parts of porous adhesive, 1-2 parts of dioxygen amine powder and 2-8 parts of polyethylene glycol.