Patent classifications
C08G18/4692
Polyurethane coating compositions
The present invention relates to non-aqueous coating agent compositions, containing at least one polyol (A), at least one silane-modified compound (B) of formula (I), optionally one or more silane-free aliphatic or cycloaliphatic polyisocyanates (C) having free or blocked isocyanate groups, and at least one catalyst (D) for the cross-linking of the silane groups. Furthermore, the non-aqueous coating agent compositions according to the invention can contain one or more surface additives (E) and one or more non-aqueous solvents (F).
Thermoplastic polyurethane resin composition having enhanced texture and durability and production method thereof
A thermoplastic polyurethane resin composition having enhanced texture and durability is capable of ensuring excellent appearance quality by applying polyester polyol including, polytetramethylene ether glycol and polydimethylsiloxane diol to an existing thermoplastic polyurethane resin composition, having excellent mechanical properties and long-term durability, such as anti-scratch and abrasion resistance, while largely enhancing texture quality, largely reducing producing costs by replacing a material such as natural leather, reducing generation of a volatile organic compound (VOC), and using the VOC in a surface material for a vehicle interior material.
PROCESS FOR THE PREPARATION OF POLYURETHANE SOLUTIONS BASED ON SILICONPOLYCARBONATE DIOLS
The present invention provides silicon-based polycarbonates, processes for their preparation and their use in the synthesis of copolymers, in particular segmented copolymers such as polyurethanes for biomedical applications.
THERMOPLASTIC SILICONE-POLYURETHANE ELASTOMER AND METHOD FOR PREPARING THE SAME
The present invention relates to a thermoplastic silicone-polyurethane elastomer and a method for preparing the same. The elastomer is prepared from raw materials comprising: 25-80 parts of a macromolecular polyol, 0-60 parts of a silicone oil or a liquid silicone rubber, 10-50 parts of a diisocyanate, 3-20 parts of a small molecular diol as a chain extender, and 0.1-3 parts of an auxiliary agent. The macromolecular polyol is selected from a silicon-free polyol having a molecular weight of between 1,000 and 4,000 g/mol and a polyol modified by silicone through copolymerization or grafting. The small molecular diol is a small molecular diol comprising 10 or less carbon atoms. The thermoplastic silicone-polyurethane elastomer of the present invention has the following excellent performance parameters: a hardness of Shore A40-D80; a tensile strength 5 MPa; smooth hand feeling; resistance to dirt such as dust; resistance to liquid permeation; no irritation to skin; good encapsulation effect on PC, ABS, TPU and the like; and a 180 peel strength >25 N/25 mm.
USE OF AN ORAGANOCARBONATE-MODIFIED PREPOLYMER AS REACTANT FOR PREPARATION OF ISOCYANATE-FREE AND ISOTHIOCYANATE-FREE ALKOXYSILANE POLYMERS
The use of an organocarbonate-modified prepolymer having at least an average of 1.5 carbonate, thiocarbonate, carbamate or thiocarbamate groups bonded directly to the polymer backbone each via an oxygen atom, where each of these oxygen atoms has its origin in the reaction of a primary, secondary or tertiary hydroxyl group of the polymer backbone and a reactive compound selected from the group consisting of a diorganocarbonate, a diorganothiocarbonate, a cyclic carbonate, a cyclic thiocarbonate, an N,N-diheterocyclourea derivative and an N,N-diheterocyclothiourea derivative. Also, the preparation of the alkoxysilane polymers.
URETHANE ALKYD RESIN
A formulation and process of preparing a functionalized-urethane alkyd resin, and a siliconized-urethane alkyd resin, is obtained from an alkyd based on semi drying/drying oils, or their fatty acids, having high iodine number of 120-170 (gm I.sub.2/100 gm), followed by grafting of epoxy-alkyl-alkoxy silane or silanol-functional silicone resin into an alkyd backbone. There is also subsequent urethanization of the organosilane grafted alkyd. Siliconized-urethane alkyd thus obtained were incorporated in solvent-borne pigmented-coating compositions and found suitable for preparing air drying 1 pack coatings providing excellent corrosion resistance, weathering and mechanical properties when applied on variety of substrates such as mild steel, corroded mild steel, other metals, alloys, glass, wood and cementitious materials
An Improved Urethane Alkyd Resin
The present invention relates to the formulation and process of preparing a functionalized urethane alkyd resin. More particularly, the invention relates to a siliconized urethane alkyd resin obtained from an alkyd based on semi drying/drying Oils or their fatty acids having high iodine number of 120-170 (gm I.sub.2/100 gm) followed by grafting of epoxy alkyl alkoxy silane or silanol functional silicone resin into the alkyd backbone and subsequent urethanization of the organosilane grafted alkyd. Siliconized urethane alkyd thus obtained were incorporated in solvent borne pigmented coating compositions and found suitable for preparing air drying 1 pack coatings providing excellent corrosion resistance, weathering and mechanical properties when applied on variety of substrates such as mild steel, corroded mild steel, other metals, alloys, glass, wood and cementitious etc.
Silicone-Containing Polyesters, Coating Compositions Containing the Same, and Coatings Formed Therefrom
A silicone-containing polyester polyol can include a reaction product prepared from reactants including: a diol; a polyol having at least three hydroxyl groups; a dimer of a fatty acid having two carboxylic acid groups, or an anhydride or ester thereof; and a silicone component having siloxane linkages and at least two reactive functional groups selected from hydroxyl groups, amino groups, thiol groups, carboxylic acid groups, anhydride groups, or combinations thereof. A coating composition for preparing an anti-fingerprinting, soft touch coating can include the silicone-containing polyester polyol and a crosslinker reactive with the silicone-containing polyester polyol.
Aging-Resistant Moisture-Curing Compositions
The present invention relates to aging-resistant moisture-curing compositions on the basis of silane-functional prepolymers that contain amino-functional compounds as the anti-aging agent. The invention also relates to the cured compositions obtainable therefrom and the use of these moisture-curing compositions or the cured compositions as sealants, adhesives and coatings.
Silyl-terminated resin composition and method for producing same
There are provided a silyl-terminated resin composition and a method for producing the same, the silyl-terminated resin composition being superior in storage stability before curing and providing a cured product which has a low initial modulus and can maintain the low modulus even after a heat-accelerated test. The silyl-terminated resin composition comprises a surface-treated calcium carbonate and a silyl-terminated resin, wherein the surface-treated calcium carbonate is obtained by surface-treating calcium carbonate having a BET specific surface area in the range of 1 m.sup.2/g to 60 m.sup.2/g with a fatty acid, and has an alkali metal content in the range of 500 g/g to 2000 g/g and the free fatty acid as determined by ethanol extraction in the range of 1.8 to 2.5% by mass.