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US 8,906,974 B2Granted
Method for producing polyurethane foam
AssigneeEvonik Degussa GmbH
InventorsMartin Glos, Carsten Schiller, Christian Eilbracht
Life of this patent
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Abstract
A method for producing polyurethane foams by reacting at least one organic isocyanate moiety, at least one polyol, a blowing agent consisting of halogen-containing (fluorine-containing) olefins and at least a siloxane of Formula I b, c and d are defined herein, as well as compositions made by said method are described.
Claims12
A method for producing polyurethane foams comprising reacting at least one organic isocyanate containing two or more isocyanate functions, at least one polyol containing two or more isocyanate-reactive groups, and a blowing agent consisting of at least one halogenated olefin and at least one siloxane of formula (I):
- a in each occurrence independently is from 1 to 300,
- b in each occurrence independently is from 1 to 50,
- c in each occurrence independently is >0 to 4,
- d in each occurrence independently is >0 to 4,
- with the proviso that, per molecule of formula (I), the average number Σd of T-units and the average number Σc of Q-units per molecule are neither greater than 20, the average number Σa of D-units per molecule is not greater than 1500 and the average number Σb of R1-bearing siloxy units per molecule is not greater than 50,
- R in each occurrence independently is one or more than one moiety selected from the group consisting of linear, cyclic or branched, aliphatic or aromatic, saturated or unsaturated hydrocarbon moieties having 1 up to 20 carbon atoms,
- R2 in each occurrence independently is R1 or R,
- R1 is unlike R and in each occurrence independently is an organic moiety and/or a moiety selected from the group consisting of:
- —CH2—CH2—CH2—O—(CH2—CH2O—)x—(CH2—CH(R)O—)y—R″
- —CH2—O—(CH2—CH2O—)x—(CH2—CH(R1)O—)y—R″
- —CH2—RIV
- —CH2—CH2—CH2—O—CH2—CH(OH)—CH2OH
- —CH2—CH2—CH2—O—CH2—C(CH2OH)2—CH2—CH3, where
- x is from 0 to 100,
- x′ is 0 or 1,
- y is from 0 to 100,
- R′ in each occurrence independently is an alkyl or aryl group of 1 to 12 carbon atoms, and
- R″ in each occurrence independently is hydrogen or an alkyl group of 1 to 4 carbon atoms, a —C(O)—R′″ group where R′″=alkyl, a —CH2—O—R′ group, an alkylaryl group, or a
- —C(O)NH—R′ group,
- RIV is a linear, cyclic or branched hydrocarbon moiety having 1 to 50 carbon atoms,
- R4 in each occurrence independently is R, R1 and/or a heteroatom-substituted, functionalized, organic, saturated or unsaturated moiety selected from the group consisting of alkyl, aryl, chloroalkyl, chloroaryl, fluoroalkyl, cyanoalkyl, acryloyloxyaryl, acryloyloxyalkyl, methacryloyloxyalkyl, methacryloyloxypropyl and vinyl,
- with the proviso that at least one substituent from R1, R2 and/or R4 is other than R.
19 more elements
A composition of matter comprising a polyurethane foam and from 0.01% to 10% by weight of at least one siloxane of formula (I), based on the total weight of the polyurethane foam,
- a in each occurrence independently is from 1 to 300,
- b in each occurrence independently is from 1 to 50,
- c in each occurrence independently is >0 to 4,
- d in each occurrence independently is >0 to 4,
- with the proviso that, per molecule of formula (I), the average number Σd of T-units and the average number Σc of Q-units per molecule are neither greater than 20, the average number Σa of D-units per molecule is not greater than 1500 and the average number Σb of R1-bearing siloxy units per molecule is not greater than 50,
- R in each occurrence independently is one or more than one moiety selected from the group consisting of linear, cyclic or branched, aliphatic or aromatic, saturated or unsaturated hydrocarbon moieties having 1 up to 20 carbon atoms,
- R2 in each occurrence independently is R1 or R,
- R1 is unlike R and in each occurrence independently is an organic moiety and/or a moiety selected from the group consisting of:
- —CH2—CH2—CH2—O—(CH2—CH2O)x—(CH2—CH(R′)O—)y—R″
- —CH2—CH2—O—(CH2—CH2O—)x—(CH2—CH(R′)O—)y—R″
- —CH2—RIV
- —CH2—CH2—CH2—O—CH2—CH(OH)—CH2OH
- —CH2—CH2—CH2—O—CH2—C(CH2OH)2—CH2—CH3, where
- x is from 0 to 100,
- x′ is 0 or 1,
- y is from 0 to 100,
- R′ in each occurrence independently is an alkyl or aryl group of 1 to 12 carbon atoms, and
- R″ in each occurrence independently is hydrogen or an alkyl group of 1 to 4 carbon atoms, a —C(O)—R′″ group where R′″=alkyl, a —CH2—O—R′ group, an alkylaryl group, or a —C(O)NH—R′ group,
- RIV is a linear, cyclic or branched, including further substituted, hydrocarbon moiety having 1 to 50 carbon atoms,
- R4 in each occurrence independently is R, R1 and/or a heteroatom-substituted, functionalized, organic, saturated or unsaturated moiety selected from the group consisting of alkyl, aryl, chloroalkyl, chloroaryl, fluoroalkyl, cyanoalkyl, acryloyloxyaryl, acryloyloxyalkyl, methacryloyloxyalkyl, methacryloyloxypropyl and vinyl,
- with the proviso that at least one substituent from R1, R2 and/or R4 is other than R.
18 more elements
Dependencies are inferred from the claim text.