Abstract:
PURPOSE: A microporous polyurethane elastomer is provided to remarkably improve permanent contraction strain and durability and to maintain physical properties. CONSTITUTION: A microporous polyurethane elastomer is manufactured by chain-extending an NCO terminated polyurethane prepolymer by an alcohol-substrate chain extender and/or crosslinking agent. The NCO terminated polyurethane prepolymer uses the mixed polyol of a polycaprolactone polyol and polyether polyol with a number average molecular weight of 250 or more. The ratio of an isocyanate part and polyol part in the polyurethane prepolymer is NCO/OH(mole ratio) = 1.6-15.0.
Abstract:
본 발명은 고활성 이중 금속시아염(DMC)촉매 또는 다중금속 시안염(MMC)촉매에 관한 것으로서, 보다 상세하게는 락테이트(lactate)계 화합물을 주착물화제로 사용하는 이중 금속시아염(DMC)촉매 또는 다중금속 시안염(MMC)촉매 및 이를 이용한 폴리올 제조 공정에 관한 것이다. 본 발명에 따른 촉매는 금속시아염(DMC)촉매 또는 다중금속 시안염(MMC)촉매로서 락테이트계 화합물을 주착물화제로 사용하며, 부 착물화제로 선택적으로 폴리에테르 화합물을 사용하는 것을 특징으로 한다. 본 발명에 따른 촉매는 3급 부틸알코올(t-butyl alcohol)을 착물화제로 이용하는 촉매보다 제조 공정이 간편하고, 유기착물화제의 양이 적으며, 친환경적이다. 또한 이 촉매를 이용하여 에폭시 단량체를 개환중합 하였을 경우 중합활성화가 매우 빨라 유도시간(induction time 혹은 induction period)이 짧고 활성이 매우 높다. 또한 제조된 폴리올은 낮은 점도를 가지며, 투명도이 뛰어나며, 분자량이 현저히 높고, 분자량 분포도가 좁고, 불포화도(unsaturation level) 혹은 모놀(monol) 함량이 저하된다.
Abstract:
PURPOSE: A catalyst for epoxy ring-opening polymerization is provided to reduce the generation of alcohol byproducts and to generate polymer of a low unsaturation degree by including the active components of metallic complex compounds, organic complex agents, and phosphorus compounds. CONSTITUTION: A catalyst for epoxy ring-opening polymerization includes metallic complex compounds, organic complex agents, and phosphorus compounds. The metallic complex compounds are selected from a group based on double metal cyanide. The organic complex agents are selected from a group composed of C1 to C10 alcohols, glycol of 500 to 5000 number average molecular weights, C1 to C6 alkyl lactates, and the mixture of the same. The double metal cyanide is zinc chloride-hexacyanocobaltate zinc represented by chemical formula a. The content of the organic complex agents is between 0.1 and 20 parts by weight based 1 part by weight of the metallic complex compounds. The content of the phosphorus compounds is between 0.1 and 20 parts by weight based on 1 part by weight of the metallic complex compounds.
Abstract:
PURPOSE: A polyol for producing a polyurethane foam and a producing method of the polyurethane foam are provided to secure flame lamination property of the foam for a fiber, and to reduce the producing cost of the polyurethane foam. CONSTITUTION: A producing method of a polyurethane foam with flame lamination property comprises a step of foaming polyetherpolyol or a polyol compound formed with polyetherpolyol and polymer polyol with isocyanate. The polyetherpolyol contains 10~80wt% of multi-functional polyetherpolyol including a functional group of 4~8 and the molecular weight of 1,000~10,000 grams per mol, and 20~80wt% of polyetherpolyol with the functional group of 2~3.
Abstract:
PURPOSE: A method for preparing non-yellowing foam is provided to improve high elasticity and high elongation, to keep a reaction speed without use of an excess of catalyst, and to ensure a molding stability of foam. CONSTITUTION: A method for preparing non-yellowing foam comprises a step of making foam by reacting a resin premix with isophorone diisocyanate. The resin premix includes 100.0 parts by weight of polyol consisting of 50-90 weight% polyether polyol with an OH functional group of 3-5 and molecular weight of 3,000-9,000 and 10-50 weight% polyester polyol; 0.1-10 parts by weight of cross-linking agent, 0.1-10 parts by weight of surfactant, and 0.01~5.0 parts by weight of 1,8-diazabicycloalkene and organic tin catalyst.
Abstract:
본 발명은 무황변 우레탄 폼 및 그 제조 방법에 관한 것으로서, 보다 상세하게는 슬라브용 저밀도 무황변 우레탄 폼 및 그 제조 방법에 관한 것이다. 본 발명에 따른 무황변 우레탄 폼은 OH 관능기가 3 - 8 이며 분자량이 3,000 - 9,000 인 폴리에테르 폴리올, 가교제, 정포제, 및 디아자 바이시클로알켄 및 유기계 금속 촉매를 포함하는 레진 프리믹스를 지방족 또는 지환족 디이소시아네이트와 혼합 발포시켜 제조됨으로써, 연속생산 방식으로 제조되는 슬라브 제조 공정에서 폼의 붕괴를 방지할 수 있으며, 소량의 촉매를 사용하여 촉매의 과다 사용으로 인한 황변현상을 억제할 수 있는 효과가 있다. 무황변
Abstract:
A method for preparing flame-retardant polymer polyol is provided to produce the polymer polyol that is superior in dispersion stability, mechanical strength, and flame retardancy. A method for preparing flame-retardant polymer polyol includes a step of adding 1-10wt% of halogenated styrene and 90-99wt% of ethylenically unsaturated monomer to aromatic polyester polyol, and polymerizing the admixture. The aromatic polyester polyol has a functionality of 2-3 and a hydroxyl group number of 50-700. The ethylenically unsaturated monomer is selected from the group comprising styrene, acrylonitrile, acrylate, methacrylonitrile, acryloin, methylmethacrylate, vinylacetate, vinylchloride, vinylidene chloride, acrylamide, methacrylamide, and mixtures thereof.