A polyol formulation for producing flameproof polyurethane/polyisocyanate rigid foams (referred to individually or jointly in the following as “PUR/PIR rigid foams”), containing a polyester polyol having an OH number ≤250 mg KOH/g, a functionality of 1.5 to 2.5 and a free glycol content with Mn<150 g/mol of <6 wt. %, a polyethylene glycol with an average molecular weight of <700 g/mol and an average functionality of <2.5 and specific polyethyleneglycol alkylphenyl ethers, and methods for producing PUR/PIR rigid foams using said polyol formulation and to the PUR/PIR rigid foams obtained thereby are provided.

A polyurethane hot melt adhesive is provided. The polyurethane hot melt adhesive is formed by reacting an isocyanate component, a polyol component, and a chain extender component. The polyol component includes a first polyol and a second polyol, a number-average molecular weight of the first polyol is within a range from 650 to 1,500, and a number-average molecular weight of the second polyol is within a range from 1,500 to 3,000. The chain extender component includes a first chain extender and a second chain extender, and the second chain extender is a diyol having an ether group or a hydrocarbyl. A ratio between a weight percentage of the first chain extender and a weight percentage of the second chain extender is within a range from 9:1 to 4:1. A forming temperature of the polyurethane hot melt adhesive is within a range from 100° C. to 150° C.

This invention relates to the field of polymers. More specifically, the invention comprises thermoplastic polyurethane elastomers comprising polyesters comprising nitro-substituted dicarboxylic acids that are products obtained by decomposition of polyethylene. The thermoplastic polyurethane elastomers described herein exhibit higher glass transition temperatures and higher Shore A hardness compared to thermoplastic polyurethane elastomers synthesized from similar polyester diols made from virgin monomers that do not contain nitro substitution.

A curable glass coating composition including 5-70 wt % aliphatic polycarbonate diol, 5-60 wt % crosslinker, 1-20 wt % extender, 4-20 wt % fatty alcohol, and 2-30 wt % crystalline or amorphous powder filler material, and optionally 2-20 wt % aliphatic polyester polyol and 2-20 wt % cycloaliphatic epoxy. The coating composition can be applied to a glass substrate and cured to form a decorative cured polyurethane coating layer on the substrate that has improved caustic and UV resistance.

A method for forming a multilayer coating film which includes forming an uncured coating film by applying a first aqueous base coating composition, forming an uncured coating film by applying a second aqueous base coating composition, forming an uncured coating film by applying a clear coating composition, and simultaneously heat curing the obtained coating films. The first aqueous base coating composition contains a carbodiimide compound, the clear coating composition contains a hydroxyl group-containing acrylic resin (A) having a hydroxyl value of 120 to 160 mgKOH/g and an acid value of 5 to 10 mgKOH/g, a polyisocyanate compound (B), and a polycarbonate diol compound (C). The component (A) has a hydroxyl group-containing alkyl moiety having 3 or less carbon atoms, and the ratio of the numbers of moles of the isocyanate functional groups of the component (B) and the hydroxyl group functional groups of the component (A) is 1.15 to 1.35.

The present application relates to the technical field of floor surface decoration materials, and particularly provides a multi-coating radiation-cured pre-coating film and a preparation method therefor. The first aspect of the present application provides the multi-coating radiation-cured pre-coating film, which sequentially comprises a flexible transparent film layer and a radiation-cured coating from bottom to top, wherein the radiation-cured coating sequentially comprises a radiation-cured elastic primer layer and a radiation-cured wear-resistant finish paint layer from bottom to top, the at least one radiation-cured elastic primer layer and the at least one radiation-cured wear-resistant finish paint layer are arranged, and the radiation-cured elastic primer layer equentially comprises a radiation-cured elastic wear-resistant primer layer and a radiation-cured elastic matte/bright primer layer from bottom to top.

A thermoplastic polyurethane resin suitable for melt spinning is formed from a reaction mixture via a polymerization reaction. The reaction mixture includes an isocyanate component and a polyol component. The polyol component includes a first polyol that has a first number average molecular weight and a second polyol that has a second number average molecular weight. The first number average molecular weight is between 1,000 g/mol and 1,500 g/mol, and the second number average molecular weight is between 2,500 g/mol and 3,000 g/mol. One resin component formed by the first polyol via the polymerization reaction is defined as a low melting point segment and correspondingly has a first melting point between 170° C. and 185° C. Another resin component formed by the second polyol via the polymerization reaction is defined as a high melting point segment and correspondingly has a second melting point between 195° C. and 210° C.

A thermal plastic polyurethane with a stress more than 2.5 MPa, its preparing formulation and making process are disclosed. In particular, the thermal plastic polyurethane with a stress more than 2.5 MPa is prepared from a formulation comprises a polycarbonate derivative and a chain extender.

There is provided a pressure sensitive adhesive composition comprising a polyurethane polymer that comprises the reaction product of a polyisocyanate component and a polyol component. The polyol component has a hydrophilic-lipophilic balance (HLB) less than 10. The polyurethane further comprises 0.5 to 10 wt.-% of hydrophilic polymerized units having an HLB greater than 12, such as a reaction product of a polyethylene glycol polymer. In another embodiment, the polyurethane further comprises pendent ethylenically unsaturated groups. Also described are articles such as laminating tapes and protective films as well as methods of bonding substrates with the pressure sensitive adhesive and laminating tape.

This invention relates to moisture curable polyurethane adhesive compositions and more particularly to moisture curable polyurethane adhesive compositions having improved initial tack and moisture permeability when cured. In one embodiment the disclosed moisture curable polyurethane adhesive compositions are suited for use as hot melt adhesives for use in manufacturing textile, clothing and/or footwear articles.