Copolyester polyol resins, foamable blends comprising the same, and resultant polyisocyanurate foams
OwnerRobert H. Blanpiedinventor
Life of this patent
Estimating the term…
Abstract
Copolyester polyol resins comprising the reaction product of an aromatic component, an aliphatic component selected from certain dibasic compounds, at least one primary hydroxyl glycol, and at least one secondary hydroxyl glycol, the mole ratios of the components being: (i) glycols to aromatic plus aliphatic component of about 1.3 to 2:1, (ii) aliphatic component to aromatic component of about 0.3 to 1.7:1, and (iii) primary glycol to secondary glycol of about 0.6 to 2.5:1. The invention also comprises foamable blends utilizing such resins and resultant polyisocyanurate foams.
Claims20
A hydroxyl terminated copolyester polyol resin having a functionality between about 2 and about 3 comprising the reaction product of:
- (i) an aromatic component selected from phthalic anhydride;
- phthalic acid isomers;
- di-lower alkanol esters of phthalic acids;
- di-, and tri-carbomethoxy substituted diphenyls, benzyl esters, toluenes, benzenes, or benzophenones;
- or mixtures thereof, and
- (ii) at least one aliphatic component selected from succinic, glutaric, or adipic acids, esters, anhydrides, or mixtures thereof,
- (iii) at least one primary hydroxyl glycol, and
- (iv) at least one secondary hydroxyl glycol;
- the mole ratios of the components being:
- (i) glycols to aromatic plus aliphatic component of from about 1.3 to 2:1,
- (ii) aliphatic component to aromatic component of from about 0.3 to 1.7:1, and
- (iii) primary glycol to secondary glycol being from about 0.6 to 2.5:1, where the charged mole ratios are the same as the final mole ratios since no removal of glycols is made during the reaction.
A foamable copolyester polyol blend comprising:
- (a) A hydroxyl terminated copolyester polyol resin having a functionality between about 2 and about 3 comprising the reaction product of:
- (i) at least one aromatic component selected from phthalic anhydride;
- phthalic acid isomers;
- di-lower alkanol esters of phthalic acids;
- mono-, di-, and tri-carbomethoxy substituted diphenyls, benzyl esters, toluenes, benzenes, benzophenones;
- or mixtures thereof, and
- (ii) at least one aliphatic component selected from succinic, glutaric, or adipic acids, esters, anhydrides, or mixtures thereof,
- (iii) at least one primary hydroxyl glycol, and
- (iv) at least one secondary hydroxyl glycol;
- the mole ratios of the components being:
- (i) glycols to aromatic plus aliphatic component of from about 1.3 to 2:1,
- (ii) aliphatic component to aromatic component of from about 0.3 to 1.7:1, and
- (iii) primary glycol to secondary glycol being from about 0.6 to 2.5:1, where the charged mole ratios are the same as the final mole ratios since no removal of glycols is made during the reaction.
- (b) A catalyst suitable for preparing a polyisocyanurate foam;
- (c) A foaming agent suitable for preparing a polyisocyanurate foam;
- and, optionally,
- (d) A surfactant suitable for controlling foam cell size and shape.
A polyisocyanurate foam comprising the reaction product of:
- (a) A polymethylene polyphenylisocyanate,
- (b) A hydroxyl terminated copolyester polyol resin having a functionality between about 2 and about 3 comprising the reaction product of:
- (i) an aromatic component selected from phthalic anhydride;
- phthalic acid isomers;
- di-lower alkanol esters of phthalic acids;
- mono-, di-, and tri-carbomethoxy substituted diphenyls, benzyl esters, toluenes, benzenes, benzophenones, or mixtures thereof,
- (ii) at least one aliphatic component selected from succinic, glutaric, or adipic acids, esters, anhydrides, or mixtures thereof,
- (iii) at least one primary hydroxyl glycol,
- and
- (iv) at least one secondary hydroxyl glycol;
- the mole ratios of the components being:
- (i) glycols to aromatic plus aliphatic component of from about 1.3 to 2:1,
- (ii) aliphatic component to aromatic component of from about 0.3 to 1.7:1, and
- (iii) primary glycol to secondary glycol being from about 0.6 to 2.5:1;
- where the charged mole ratios are the same as the final mole ratios since no removal of glycols is made during the reaction.
- (c) A catalyst suitable for preparing a polyisocyanurate foam,
- (d) A foaming agent suitable for preparing a polyisocyanurate foam, and, optionally,
- (e) A surfactant suitable for controlling foam cell size and shape.
Dependencies are inferred from the claim text.