Abstract: Provided is a polymerizable composition including (a) a polymerizable component comprising a diol bis(allyl carbonate) and/or a pre-polymer thereof; and (b) a polymerization initiator component including: (i) a di(C6-C10 alkyl) peroxydicarbonate, and (ii) an organic peroxide having one peroxy, one peroxycarbonate, or one peroxybenzoate group and a 1,1-dimethylalkyl group bonded to a peroxy oxygen, where (ii) comprises a molecular weight ranging from 200 to 250 g/mole, the polymerization initiator (b) is free of diisopropyl peroxydicarbonate, (i) comprises an amount ranging from 4.87% to 7.90% by weight relative to the total solids of the polymerizable composition and (ii) comprises an amount within the range defined by the following formula: (4.406X2?0.592X+0.021)?Y?(0.726X2?0.121X+0.009) where X corresponds to the weight fraction of (i) and Y corresponds to the weight fraction of (ii). Also provided is a method of making an optical article from the polymerizable composition.

Abstract: Polyetherpolyols containing residues of catalysts of the double metal cyanide complex class are treated with a strong base and ion exchanged or neutralized and filtered to provide a stable polyol with reduced tendency to form allophanates with diisocyanates. Further, the addition of ethylene oxide to the polyol while in contact with the strong base serves to end cap the polyol to provide it with primary hydroxyl groups.

Abstract: A laminated product such as a tire is cast from chemically extending liquids which form a laminated solid in a mold. The mold cavity is closed in preparation for use except for casting fluid inlet ports and exhaust vents. The mold cavity defines the shape of the product to be cast. Two or more chemically extendable liquids are injected into the mold without mixing through the inlet ports. Each liquid is injected through a different port. After injection, the liquids are arranged in alternate circumferential segments within the annular space. At least one of the inner and outer surfaces which define the mold cavity is then rotated about the common axis to impart a spiral configuration to each of the injected liquids. The liqiuds are then allowed to chemically extend to solids and form a laminated product such as a tire.

Abstract: A thermoset, segmented and elastomeric polypropylene ether urethane is made by reacting together tolylene diisocyanate, ethylene glycol and a polypropylene ether triol having an average molecular weight of from 7,000 to 14,000, in certain ratios. The resulting polyurethane exhibits a temperature retraction TR-10 of less than about -35.degree. C. and a Goodyear-Healy rebound of greater than about 55%.

Abstract: A thermoplastic, linear and segmented poly-1,2-propylene ether urethane having a Tg of below about -30.degree. C. for the poly-1,2-propylene ether segments is made by reacting poly-1,2-propylene glycol having a high molecular weight; ethylene glycol, 2,3-butane diol or neopentyl glycol or mixture thereof; and 2,4-tolylene diisocyanate containing from about 55 to 100% by weight of the 2,4-isomer with the balance being the 2,6-isomer.

Abstract: A laminated product such as a tire is cast from chemically extending liquids which form a laminated solid in a mold. The mold cavity is closed in preparation for use except for casting fluid inlet ports and exhaust vents. The mold cavity defines the shape of the product to be cast. Two or more chemically extendable liquids are injected into the mold without mixing through the inlet ports. Each liquid is injected through a different port. After injection, the liquids are arranged in alternate circumferential segments within the annular space. At least one of the inner and outer surfaces which define the mold cavity is then rotated about the common axis to impart a spiral configuration to each of the injcted liquids. The liquids are then allowed to chemically extend to solids and form a laminated product such as a tire.