44results about How to "Ensure the uniformity of foaming" patented technology

The invention discloses a polyurethane foaming method by combining and using carbon dioxide and organic amine. The method comprises the following step of mixing a polyurethane foaming composition witha polyisocyanate monomer and/or isocyanate-terminated prepolymer for foraming, wherein before mixing, carbon dioxide is added to the polyurethane foaming composition, or added into the polyisocyanatemonomer and/or isocyanate-terminated prepolymer, or simultaneously added into the polyurethane foaming composition and the polyisocyanate monomer and/or isocyanate-terminated prepolymer, and the carbon dioxide is gas carbon dioxide, liquid carbon dioxide, subcritical carbon dioxide and/or supercritical carbon dioxide.

The invention discloses an alkaline foaming agent containing a polyamine salt and a propanolamine salt. The alkaline foaming agent has a pH value of between 8.5 and 9.5, and the foaming agent comprises: 1) a first compound mixture (M1) comprising organic polyamine salt compounds of a following general formula (I): A<->B<+> (I), wherein B<+> is a cation of an organic polyamine B, and A<-> is CO<3><2->, HCO<3><->, or a combination of CO<3><2-> and HCO<3><->; and 2) a second compound mixture(M2) comprising an N-monohydroxypropyl-ammonium carbonate compound of a general formula (II) and an N,N'-di(hydroxypropyl)-ammonium carbonate compound of a general formula (III): (RN<+>H<3>)(N<+>H<4>)CO<3><2-> (II), or (RN<+>H<3>)<2>CO<3><2-> (III), wherein R is hydroxypropyl, and the molar ratio of the compound of the general formula (II) to the compound of the general formula (III) is from 1:0 to 1:1.0. The foaming agent is suitable for use in the preparation of a polyurethane spray foam material.

The invention discloses a polyurethane alkaline foaming agent containing an orthoformic acid alcohol amine salt and a carbonic acid propanolamine salt. The alkaline foaming agent has a pH value of between 8.5 and 9.5, and the foaming agent comprises: 1) a first compound mixture (M1) comprising orthoformic acid alcohol amine compounds of a following general formula (I): A<->B<+> (I), wherein B<+> is a cation of an organic alcohol amine B, and A<-> is orthoformate; and 2) a second compound mixture (M2) comprising a N-monohydroxypropyl-ammonium carbonate compound of a general formula (II) and anN,N'-di(hydroxypropyl)-ammonium carbonate compound of a general formula (III): (RN<+>H<3>)(N<+>H<4>)CO<3><2-> (II), or (RN<+>H<3>)<2>CO<3><2-> (III), wherein R is hydroxypropyl, and the molar ratio ofthe compound of the general formula (II) to the compound of the general formula (III) is from 1:0 to 1:1.0. The foaming agent is suitable for use in preparation of a polyurethane spray foam material.

The invention discloses a polyurethane alkaline foaming agent containing tertiary amine salts and propanol amine salts. A pH value of the alkaline foaming agent is between 8.5 and 9.5. The foaming agent comprises the following components: 1) a first compound mixture (M1) containing organic tertiary amine salt compounds having a general formula (I) which is A<->[B<+>]p, the B<+> is a cation of organic tertiary amine B with +1 valence and the A<-> is CO<3><2->, HCO<3><-> or a combination of the CO<3><2-> and HCO<3><->; and 2) a second compound mixture (M2) containing N-monohydroxypropyl-ammoniumcarbonate compounds having a general formula (II) which is (RN<+>H3)(N<+>H4)CO<3><2-> and N,N'-bis(hydroxypropyl)-ammonium carbonate compounds having a general formula (III) which is (RN<+>H3)2CO<3><2->, wherein the R is a hydroxypropyl group, and a molar ratio of the compounds of the formula (II) to the compounds of the formula (III) is 1:0 to 1:1.0. The foaming agent is suitable for the preparation of polyurethane spray foam materials.

The invention discloses a foaming agent containing secondary amine and alcohol amine salts and an application for a foam material of polyurethane continuous slabs, and discloses the polyurethane foaming agent containing the secondary amine salts and alcohol amine salts. The foaming agent comprises the following components: 1) a first compound mixture (M1) containing organic secondary amine salt compounds having a general formula (I) which is A<->[B<+>]p, wherein the B<+> is a cation of organic secondary amine B with +1 valence and the A<-> is CO<3><2->, HCO<3><-> or a combination of the CO<3><2-> and HCO<3><->; and 2) a second compound mixture (M2) containing N-monohydroxypropyl/monohydroxyethyl-ammonium carbonate compounds having a general formula (II) which is (RN<+>H3)(N<+>H4)CO<3><2->and N,N'-bis(hydroxypropyl/hydroxyethyl)-ammonium carbonate compounds having a general formula (III) which is (RN<+>H3)2CO<3><2->, wherein the R is a combination of a hydroxypropyl group and a hydroxyethyl group, and a molar ratio of the monoalcoholic amine compounds of the formula (II) to the diol amine compounds of the formula (III) is 1:0 to 1:2.5. The foaming agent is suitable for the preparation of a foam material of polyurethane continuous slabs.