4results about "Wax adhesives" patented technology

The application belongs to the technical field of adhesives and sealants, and specifically provides a sealing wax as well as a preparation method and application thereof. The sealing wax comprises the following components in parts by mass: microcrystalline wax 40-60 parts, polyethylene wax 1-5 parts, ethylene-vinyl acetate copolymer 3-8 parts, low-molecular-weight polyisobutylene 2-5 parts, medium-molecular-weight polyisobutylene 2-5 parts, tackifying resin 15-20 parts, and flame retardant 3-5 parts. The number-average molecular weight of the low-molecular-weight polyisobutylene is less than 5000, and the viscosity-average molecular weight of the medium-molecular-weight polyisobutylene is 10000-40000. Through the design and mutual compounding of the components, the sealing wax has a high melting point, a low water absorption rate, a high volume resistivity, good high-temperature and low-temperature resistance, and strong waterproof and moisture-proof performance, high mechanical strength and toughness, high insulation, high transparency, and strong sealing effect, and has good flow leveling property and good flame retardant performance, and can meet the strict use requirements of high-end electronic equipment.

This invention discloses a hot melt adhesive for high-temperature protective clothing and its preparation method, comprising the following raw materials: Fischer-Tropsch wax, styrene-isoprene-styrene block copolymer with 0% diblock content, styrene-isoprene-styrene block copolymer with 20-30% diblock content, styrene-isoprene-styrene block copolymer with 40-50% diblock content, rosin resin, petroleum resin, ethylene-vinyl acetate copolymer, and antioxidant. This hot melt adhesive requires no toxic solvents, possesses both heat resistance and water resistance, and is suitable for high-temperature protective clothing. The preparation method of this hot melt adhesive involves heating and mixing polymer materials without adding any solvents or toxic substances during the preparation process, reducing the risk of toluene poisoning, completely solving the problems of solvent evaporation and recovery, and, more importantly, eliminating safety hazards in the storage and use of organic chemicals, achieving environmentally friendly, safe, and efficient production.

A variety of wax compositions derived from plastic waste are disclosed, including, in one embodiment, a wax composition comprising C14 to C42 n-paraffins in an amount from about 30 wt.% to about 50 wt.% based on a total weight of the wax composition, C14 to C42 non n-paraffins in an amount from about 50 wt.% to about 70 wt.% of the total weight of the wax composition, wherein the n-paraffins and the non n-paraffins comprise C40 paraffins in an amount from about 0.001 wt.% to about 5 wt.% of the total weight of the wax composition, and wherein the n-paraffins and the non n-paraffins comprise C18 paraffins in an amount from about 0.001 wt.% to about 10 wt.% of the total weight of the wax composition.

To provide a hot melt adhesive which can reduce stringing, is excellent in thermal stability, excellent in adhesive property to a paper, and also excellent in heat-resistant creep property and hot tack property.SOLUTION: There is provided a hot melt adhesive comprising: (A) a copolymer of ethylene with an olefin having 3 to 20 carbon atoms; (B) an ethylene-carboxylic acid ester copolymer; and (C) a wax. The (A) copolymer of ethylene with an olefin having 3 to 20 carbon atoms comprises (A1) a metallocene-based copolymer of ethylene with propylene, and the (B) ethylene-carboxylic acid ester copolymer comprises (B1) an ethylene-carboxylic acid ester copolymer which has a structural unit derived from the carboxylic acid ester in an amount of 2 mass% or more and less than 25 mass%, and a melt flow rate of 1 g / 10 min. or more and 400 g / 10 min. or less.SELECTED DRAWING: None