CAS: 25190-06-1; Polytetramethylene Glycol

四氢呋喃置于钨磷酸 四氢呋喃体系中,用 水 用作溶剂,化学反应生成聚四氢呋喃二醇
参考文献:Process For Producing Polyetherglycol
标题:Process For Producing Polyetherglycol
摘要:通过聚合四氢呋喃或与之可共聚的其他环状醚混合物,生产聚氧四亚甲基乙二醇或共聚聚醚乙二醇的方法,其中使用一种杂多酸作为催化剂,并允许催化剂相中存在每摩尔杂多酸0.1至15摩尔的水.上述聚合物和共聚物是工业上有用的聚合物,可用作聚氨酯的主要起始材料,用于弹性纤维和合成革,溶剂,压力流体等.

专利信息

专利号:US-10717854-B2
优先权日:2016-05-24
标题 :Solution polymerized styrene-butadiene rubber-polyurethane elastomer material for high performance tire and preparation method thereof
发明人：ZHANG LIQUN; QIN XUAN; HAN BINGYONG; MAO LIXIN; WU XIAOHUI; LIU JUN; ZHANG NING; DONG DONG
权利人:UNIV BEIJING CHEM TECH; RED AVENUE NEW MAT GROUP CO LTD; BEIJING UNIV OF CHEMICAL TEHCNOLOGY
摘要:A solution polymerized styrene-butadiene rubber-polyurethane elastomer material and a preparation method thereof are provided. The elastomer material is prepared by performing cast molding on a soft segment and a hard segment in a mass ratio of 100:(20-50); the soft segment includes hydroxyl-terminated solution polymerized styrene-butadiene moiety rubber prepared by an anionic polymerization; the hard segment comprises isocyanate, a small-molecule polyol chain extender and a cross-linking agent; and the soft segment has a molecular weight of 1000-8000 and a glass-transition temperature of −20° C. to −30° C. According to the elastomer material in the disclosure, the hydroxyl-terminated solution polymerized styrene-butadiene rubber is introduced to serve as the soft segment on the basis of synthesis of the traditional polyurethane elastomer, so that the glass-transition temperature of the polyurethane elastomer is regulated, defects such as poor high temperature resistance and undesirable wet-skid resistant grip ability of an existing polyurethane tire are overcome.

专利号:CN-1796437-A
优先权日:2004-12-29
标题 :A kind of solid acid catalyst for synthesis of polytetrahydrofuran

专利号:CN-106608964-A
优先权日:2015-10-26
标 题 :A kind of synthesis of polyurethane prepolymer

专利号:US-4892920-A
优先权日:1988-11-21
标题 :Process for the preparation of cyclohexanediisocyanate containing polyisocyanate prepolymers and polyurethanes having high temperature performance
发明人：QUAY JEFFREY R; CASEY JEREMIAH P
权利人:AIR PROD & CHEM
摘要:This invention relates to a polyisocyanate prepolymer for polyurethane and polyurethane/urea elastomer synthesis and to the resulting elastomer. The prepolymer is formed by reacting a cyclohexanediisocyanate with a long chain polyol under conditions such that essentially a 2:1 adduct is formed. Excess cyclohexanediisocyanate is removed prior to forming the elastomer.

专利号:US-6201137-B1
优先权日:1997-09-30
标 题:Process for purifying tetrahydrofurans used as starting material for polyether polyols
发明人：NAKAOKA HIROSHI; KUBOTA TOSHIRO
权利人:HODOGAYA CHEMICAL CO LTD
摘要:Tetrahydrofurans suitable for use as starting materials in the synthesis of polyether polyols without causing coloration in the product polyether polyols can be obtained by contacting crude tetrahydrofurans with a mineral acid or a strongly acidic cation-exchange resin, followed by isolation through a simple distillation and/or rectification to obtain purified tetrahydrofurans.

专利号:CN-100491428-C
优先权日:2006-12-20
标题 :Process for synthesis of polymer polyhydric alcohol