摘要:
A polyol composition is provided which when reacted with and organic isocyanate, has good flow characteristics and makes an all water blown rigid polyurethane foam having good dimensional stability at low core densities of 1.1 pcf to 2.0 pcf. The polyol composition has a polyol component which must have present a polyoxyalkylene polyether polyol having an equivalent weight of 130 or less, an average functionality of 3.1 or greater, and a hydroxyl number of 400 or more, a polyoxyalkylene polyether polyol having an average functionality from 1.5 to 3.1 and a viscosity of less than 800 cP at 25.degree. C., and a polyoxyalkylene polyether polyol having an average functionality of greater than 3.1 and an equivalent weight of greater than 130. The polyol composition also has water as the blowing agent, and further contains a blow catalyst, a delayed action gel catalyst, and preferably a cure catalyst and a surfactant.
摘要:
A polyol composition is provided which when reacted with and organic isocyanate, has good flow characteristics and makes an all water blown rigid polyurethane foam having good dimensional stability at low core densities of 1.1 pcf to 2.0 pcf. The polyol composition has a polyol component which must have present a polyoxyalkylene polyether polyol having an equivalent weight of 130 or less, an average functionality of 3.1 or greater, and a hydroxyl number of 400 or more, a polyoxyalkylene polyether polyol having an average functionality from 1.5 to 3.1 and a viscosity of less than 800 cP at 25.degree. C., and a polyoxyalkylene polyether polyol having an average functionality of greater than 3.1 and an equivalent weight of greater than 130. The polyol composition also has water as the blowing agent, and further contains a blow catalyst, a delayed action gel catalyst, and preferably a cure catalyst and a surfactant.
摘要:
A polyol composition is provided which when reacted with an organic isocyanate, has good flow characteristics and makes a rigid polyurethane foam having good dimensional stability at low densities. The polyol compostion has a polyol component which must have present a polyoxyalkylene polyether polyol having an equivalent weight of 130 or less and a hydroxyl number of 400 or more, a polyoxyalkylene polyether polyol having an average functionality from 1.5 to 3.1 and a viscosity of less than 800 cP at 25.degree. C., and a polyoxyalkylene polyether polyol having an average functionality of greater than 3.1 and a viscosity of 5,000 cp or less at 25.degree. C. The polyol composition also has formic acid or a mixture of formic acid and water as blowing agents, and further contains a delayed action blow catalyst and a delayed action gel catalyst.
摘要:
The present invention discloses a method for the formation of and a flexible slabstock polyurethane foam having substantially improved indentation force deflection and resilience characteristics while maintaining the other physical properties. The method comprises the steps of: forming a polyol blend having a nominal functionality of at least 2.3 by combining at least one polyether polyol having a plurality of terminal ethylene oxide caps of from 5 to 25% by weight based on the total weight of the polyether polyol, a molecular weight of greater than or equal to 4000 Daltons, and an unsaturation of greater than 0.04 meq/g KOH; at least one graft polyether polyol having an equivalent weight of greater than 1000 Daltons, a solids content of at least 28%, and a plurality of terminal ethylene oxide caps of from 5 to 25% by weight based on the total weight of the graft polyether polyol; and at least one very low unsaturated polyether polyol having an unsaturation of less than or equal to 0.018 meq/g KOH and a plurality of terminal ethylene oxide caps of from 5 to 25% by weight based on the total weight of the polyether polyol; providing at least one polyisocyanate component; providing a catalyst; providing water as a blowing agent at a level of between 3 to 7% by weight; and combining the polyol blend with the polyisocyanate component, the catalyst and the water to form a slabstock polyurethane foam.
摘要翻译:本发明公开了一种用于形成柔性板坯聚氨酯泡沫的方法,其具有显着改善的压痕力偏转和弹性特性,同时保持其它物理性能。 该方法包括以下步骤:通过组合至少一种具有多个端基环氧乙烷盖的聚醚多元醇形成多元醇共混物,所述多元醇共混物具有至少2.3的标称官能度,基于聚醚的总重量为5至25重量% 多元醇,分子量大于或等于4000道尔顿,不饱和度大于0.04meq / g KOH; 至少一种接枝聚醚多元醇,其当量重量大于1000道尔顿,固体含量至少为28%,多个末端环氧乙烷盖为5至25重量%,基于接枝聚醚的总重量 多元醇 和至少一种具有小于或等于0.018meq / g KOH的不饱和度的非常低的不饱和聚醚多元醇和基于聚醚多元醇总重量的5至25重量%的多个末端环氧乙烷盖; 提供至少一种多异氰酸酯组分; 提供催化剂; 以3至7重量%的水平提供水作为发泡剂; 并将多元醇共混物与多异氰酸酯组分,催化剂和水混合以形成板块聚氨酯泡沫。
摘要:
Thus, there is provided according to the present invention polyol compositions comprising(A) a polytetramethylene ether glycol, and(B) a difunctional active hydrogen compound-initiated polyoxyalkylene polyether polyol having a degree of unsaturation of not greater than 0.04 milliequivalents per gram of said polyether polyol.
摘要:
A polyol composition is provided which when reacted with an organic isocyanate, has good flow characteristics and makes a rigid polyurethane foam having good dimensional stability at low densities. The polyol composition has a polyol component which must have present a polyoxyalkylene polyether polyol having an equivalent weight of 130 or less and a hydroxyl number of 400 or more, a polyoxyalkylene polyether polyol having an average functionality from 1.5 to 3.1 and a viscosity of less than 800 cP at 25.degree. C., and a polyoxyalkylene polyether polyol having an average functionality of greater than 3.1 and a viscosity of 5,000 cp or less at 25.degree. C. The polyol composition also has formic acid or a mixture of formic acid and water as blowing agents, and further contains a delayed action blow catalyst and a delayed action gel catalyst.
摘要:
Thus, there is provided according to the present invention polyol compositions comprising(A) a polytetramethylene ether glycol, and(B) a difunctional active hydrogen compound-initiated polyoxyalkylene polyether polyol having a degree of unsaturation of not greater than 0.04 milliequivalents per gram of said polyether polyol.
摘要:
There is provided a polyol composition which comprises aa) compound having at least two isocyanate reactive hydrogens, at least one of which is a polyoxyalkylene polyether polyol,b) 2-chloropropane, and,c) a C.sub.4 -C.sub.6 aliphatic hydrocarbon.There is also provided a rigid polyurethane foam made with the polyol composition. The 2-chloropropane acts to solubilize the C.sub.4 -C.sub.6 aliphatic hydrocarbon in the polyols.
摘要:
There is now provided a polyisocyanate-based foam made by reacting an organic polyisocyanate with a polyol solution containing a C.sub.4 -C.sub.7 aliphatic and/or cycloaliphatic hydrocarbon as a blowing agent. The hydrocarbon blowing agent is soluble in the polyol solution having polyols with polyester linkages by using a reacted or unreacted compatibilizing agent represented by the formula: ##STR1## wherein R.sup.1 is preferentially OH, and R.sup.2 is a C.sub.6 -C.sub.24 aliphatic, branched or unbranched, hydrocarbon group.
摘要:
There is now provided a polyisocyanate-based foam made by reacting an organic polyisocyanate with a polyol solution containing a C.sub.4 -C.sub.7 aliphatic and/or cycloaliphatic hydrocarbon as a blowing agent. The hydrocarbon blowing agent is soluble in the polyol solution having polyols with polyester linkages by using a reacted or unreacted compatibilizing agent represented by the formula: ##STR1## wherein R.sup.1 is preferentially OH, and R.sup.2 is a C.sub.6 -C.sub.24 aliphatic, branched or unbranched, hydrocarbon group.