摘要:
An excellent flame- and smoke-resistant flexible polyurethane foam is produced by reacting a polyisocyanate with a mixture ofA. polyether polyol containing secondary hydroxyl group of at least 50 mol% of total hydroxyl content and having a number average molecular weight of 3,000-6,000 andB. a low molecular weight polyhydroxyl compound, an equivalent weight ratio of said low molecular weight polyhydroxyl compound (B) to said polyether polyol (A) being 0.5-2.0, if desired, the flame retardancy of the foam may be enhanced by the addition of a small amount of flame retardant.
摘要:
A flame- and smoke-retarded, non-shrinkable flexible polyurethane foam is prepared by reactingA. a polyol having at least two active hydrogen atoms and a molecular weight of from 1,000 to 10,000,B. a low molecular weight polyhydroxyl compound having a molecular weight of from 60 to 700,C. a polyisocyanate andD. an ammonium compound which generates ammonia gas at a temperature below 100.degree. C,wherein the equivalent weight ratio of (B) to (A) is ranging from 0.5 to 2.0 and the amount of (D) based upon 100 parts by (A) ranges from 0.5 to 10 parts by weight.
摘要:
The flexible polyurethane foams having high flame resistance and smoke resistance can be produced by reacting a polyhydroxyl compound and a polyisocyanate with a urea derivative selected from the group consisting of(a) a compound represented by the general formula ##STR1## wherein at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents hydroxylalkyl, alkoxyalkyl, alkyl and aryl groups and the remainder represents hydrogen atom, and(b) a urea-formaldehyde condensation product in the presence of a catalyst, a surfactant and a blowing agent.These polyurethane foams can easily provide the favorable foam sheets by compression-molding these foams under heating.
摘要翻译:具有高阻燃性和耐烟性的柔性聚氨酯泡沫体可以通过使多羟基化合物和多异氰酸酯与选自以下的脲衍生物反应制备:(a)由通式“IMAGE”表示的化合物,其中至少一种 R 1,R 2,R 3和R 4表示羟基烷基,烷氧基烷基,烷基和芳基,其余表示氢原子,和(b)在催化剂,表面活性剂和发泡剂存在下的脲 - 甲醛缩合产物。 这些聚氨酯泡沫可以通过在加热下对这些泡沫进行压缩成型而容易地提供有利的泡沫片材。
摘要:
A flame-resistant and smoke-retardant polyurethane foam is produced by reacting a polyisocyanate with a polyhydroxyl compound in the presence of an alkaline earth metal salt of a carboxylic acid and a foaming agent.
摘要:
The flexible polyurethane foams having high flame resistance and smoke resistance can be produced by reacting a polyhydroxyl compound and a polyisocyanate with a urea derivative selected from the group consisting of(a) a compound represented by the general formula ##STR1## wherein at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents hydroxylalkyl, alkoxyalkyl, alkyl and aryl groups and the remainder represents hydrogen atom, and(b) a urea-formaldehyde condensation product in the presence of a catalyst, a surfactant and a blowing agent.These polyurethane foams can easily provide the favorable foam sheets by compression-molding these foams under heating.
摘要翻译:具有高阻燃性和耐烟性的柔性聚氨酯泡沫体可以通过使多羟基化合物和多异氰酸酯与选自以下的脲衍生物反应制备:(a)由通式“IMAGE”表示的化合物,其中至少一种 R 1,R 2,R 3和R 4表示羟基烷基,烷氧基烷基,烷基和芳基,其余表示氢原子,和(b)在催化剂,表面活性剂和发泡剂存在下的脲 - 甲醛缩合产物。 这些聚氨酯泡沫可以通过在加热下对这些泡沫进行压缩成型而容易地提供有利的泡沫片材。
摘要:
The present invention relates to a process for manufacturing a new elastomer having high elasticity, mechanical strength and processability from epoxy compounds, trimellitoyl-functional polymers and a third element. The third element is any of acid anhydride compounds having a molecular weight lower than 700, and having at least one acid anhydride group, such as maleic, phthalic, succinic, adipic, trimellitic, pyromellitic, and benzophenone tetracarboxylic anhydrides. It is, according to another aspect, an improvement of physical properties, especially tensile and tear strengths of the elastomer manufactured by reacting said first two elements according to the copending application Ser. No. 143,643, filed May 14, 1971, while keeping desirably low exothermicity and thermal contraction during the curing.
摘要:
Aldehyde functional polymers having a molecular weight of about 500 to 50,000 and containing aldehyde functional groups at both ends and/or on side chains of the molecule are produced by subjecting some of the double bonds in a high polymer containing olefinically unsaturated double bonds to ozone-decomposition by ozone-containing gas and reducing the ozone-decomposition products by means of a trivalent phosphorus compound as a reducing agent into substantially only aldehyde functional groups.
摘要:
An excellent flame- and smoke-resistant polyurethane foam is produced by reacting a polyol, a polyisocyanate and an amine-carbamate of primary or secondary amine having hydroxyl group in the presence of a catalyst and a surfactant.
摘要:
Polyurethane is prepared by reacting a prepolymer having terminal isocyanate groups with 3,9-bis(2-hydrazidoethyl)-2,4,8,10-tetraoxaspiro-[5,5]-undecane.